Usenet 1994 October/usenetsourcesnewsgroupsinfomagicoctober1994disk2.iso/unix/volume28/skill/part03

Text File | 1994-07-15 | 68.1 KB | 2,517 lines

Newsgroups: comp.sources.unix
From: [e-mail] (Jeff Forys)
Subject: v28i089: skill - signal or reprioritize specified processes, V3.6, Part03/03
References: <[e-mail]>
Sender: [e-mail]
Approved: [e-mail]

Submitted-By: [e-mail] (Jeff Forys)
Posting-Number: Volume 28, Issue 89
Archive-Name: skill/part03

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of archive 3 (of 3)."
# Contents:  machdep/aos-43.c machdep/bsd-43.c machdep/irix-3.c
#   machdep/irix-4.c machdep/ultrix-4.c
# Wrapped by [e-mail] on Fri Jul 15 19:29:13 1994
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'machdep/aos-43.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'machdep/aos-43.c'\"
else
echo shar: Extracting \"'machdep/aos-43.c'\" \(11465 characters\)
sed "s/^X//" >'machdep/aos-43.c' <<'END_OF_FILE'
X#ifndef lint
Xstatic char rcsid[] = "$Header: aos-43.c,v 1.8 1994/06/26 04:15:19 forys Exp $";
X#endif
X
X/*
X**  This program may be freely redistributed for noncommercial purposes.
X**  This entire comment MUST remain intact.
X**
X**  AOS 4.3 support by Christos Zoulas ([e-mail])
X**
X**  Copyright 1994 by Jeff Forys ([e-mail])
X*/
X
X#define    NO_MEXTERN
X#include "conf.h"
X#undef    NO_MEXTERN
X
X#include <sys/user.h>
X#include <sys/proc.h>
X
X#include <stdio.h>
X
X/*
X * Define SigNames, NSig, and TtyDevDir here; they are used by other
X * routines and must be global.  Everyone seems to have their own
X * idea as to what NSIG should be.  Here, `NSig' is the number of
X * signals available, not counting zero.
X */
Xchar *SigMap[] = { "0",
X    "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",        /*  1 -  6 */
X    "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",        /*  7 - 12 */
X    "PIPE", "ALRM", "TERM", "URG", "STOP", "TSTP",        /* 13 - 18 */
X    "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",        /* 19 - 24 */
X    "XFSZ", "VTALRM", "PROF", "WINCH", "LOST", "USR1",    /* 25 - 30 */
X    "USR2", "32",                        /* 31 - 32 */
X};
Xint NSig = NSIG;
X
X#define    SETCMD(dst,src,maxlen) {            \
X    extern char *rindex();                \
X    if (maxlen > 0) src[maxlen] = '\0';        \
X    dst = (dst = rindex(src, '/')) ? ++dst: src;    \
X}
X
Xstatic char *TtyDevDir = "/dev";
X
Xint    Skill;            /* set 1 if running `skill', 0 if `snice' */
Xint    PrioMin, PrioMax;    /* min and max process priorities */
Xint    SigPri;            /* signal to send or priority to set */
Xpid_T    MyPid;            /* pid of this process */
Xuid_T    MyUid;            /* uid of this process */
Xchar    *ProgName;        /* program name */
X
X/*
X * This is the machine-dependent initialization routine.
X *
X *   - The following global variables must be initialized:
X *     MyPid, MyUid, ProgName, Skill, PrioMin, PrioMax, SigPri
X *   - The working directory will be changed to that which contains the
X *     tty devices (`TtyDevDir'); this makes argument parsing go faster.
X *   - If possible, this routine should raise the priority of this process.
X */
Xvoid
XMdepInit(pname)
X    char *pname;
X{
X    extern char *rindex(), *SysErr();
X
X    MyPid = (pid_T) getpid();
X    MyUid = (uid_T) getuid();
X    SETCMD(ProgName, pname, 0)
X
X    /*
X     * If we are running as root, raise our priority to better
X     * catch runaway processes.
X     */
X    if (MyUid == ROOTUID)
X        (void) setpriority(PRIO_PROCESS, MyPid, PRIO_MIN);
X
X    /*
X     * Determine what we are doing to processes we find.  We will
X     * either send them a signal (skill), or renice them (snice).
X     */
X    Skill = (strcmp(ProgName, "snice") != 0);
X
X    /*
X     * chdir to `TtyDevDir' to speed up tty argument parsing.
X     */
X    if (chdir(TtyDevDir) < 0) {
X        fprintf(stderr, "%s: chdir(%s): %s\n", ProgName, TtyDevDir,
X                SysErr());
X        exit(EX_SERR);
X    }
X
X    /*
X     * Set up minimum and maximum process priorities.
X     * Initialize SigPri to either default signal (`skill') or
X     * default priority (`snice').
X     */
X    PrioMin = PRIO_MIN;
X    PrioMax = PRIO_MAX;
X    SigPri = Skill? SIGTERM: 4;
X}
X
X/*
X * Carry out an action on a particular process.  If this is `skill',
X * then send the process a signal, otherwise this is `snice' so change
X * it's priority.
X *
X * If 0 is returned, the operation was successful, otherwise -1 is
X * returned and `errno' set.
X */
Xint
XMdepAction(pid)
X    pid_T pid;
X{
X    if (Skill)
X        return(kill((int)pid, SigPri));
X    else
X        return(setpriority(PRIO_PROCESS, (int)pid, SigPri));
X}
X
X/*
X * Now, set up everything we need to write a GetProc() routine.
X */
X
X#include <sys/file.h>
X#include <sys/vm.h>
X
X#include <machine/pte.h>
X
X#include <nlist.h>
X
Xstatic char *kmemf =    "/dev/kmem";    /* window into kernel virtual memory */
Xstatic char *memf =    "/dev/mem";    /* window into physical memory */
Xstatic char *swapf =    "/dev/drum";    /* paging device */
Xstatic char *kernf =    "/vmunix";    /* kernel image */
Xstatic int kmem = 0, mem = 0, swap = 0;
X
Xstatic struct nlist nl[] = {
X    { "_nproc" },
X#define    X_NPROC        0
X    { "_proc" },
X#define    X_PROC        1
X    { "_Usrptmap" },
X#define    X_USRPTMAP    2
X    { "_usrpt" },
X#define    X_USRPT        3
X    { "" },
X#define    X_LAST        4
X};
X
Xstatic    int    nproc = -1;
Xstatic    struct    proc *procp;
Xstatic    struct    pte *usrptmap, *usrpt;
X
X#define    NPROCS    32            /* number of procs to read at once */
X
Xstatic    char    *pidmap[] = { "swapper", "init", "pagedaemon" };
Xstatic    int    pidmapsiz = sizeof(pidmap) / sizeof(pidmap[0]);
X
Xextern    off_t lseek();
X
X/*
X * GetProc()
X *
X * Fill in and return a `struct ProcInfo' with information about the
X * next process.  If no processes are left, return NULL.
X *
X * Fflag support:
X *    If Fflag is set we will try to avoid reading in the user struct.
X *    We can do this only if Iflag, TtyIndx, and CmdIndx are zero.
X */
Xstruct ProcInfo *
XGetProc()
X{
X    extern char *SysErr();
X    static struct user *GetUser();
X    static struct proc procs[NPROCS], *procsp;
X    static struct ProcInfo procinfo;
X    register struct user *auser;
X    register struct proc *aproc;
X    static int thisproc = 0;
X    static int needuser = 1;        /* Fflag support */
X
X    /*
X     * If this is our first time here, open various files,
X     * and set up the nlist.
X     */
X    if (nproc == -1) {
X        char *errstr = "%s: %s: %s\n";
X        int nfound;
X
X        if ((kmem=open(kmemf, 0)) < 0) {    /* open kmem */
X            fprintf(stderr, errstr, ProgName, kmemf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((mem=open(memf, 0)) < 0) {        /* open mem */
X            fprintf(stderr, errstr, ProgName, memf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((swap=open(swapf, 0)) < 0) {    /* open swap device */
X            fprintf(stderr, errstr, ProgName, swapf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((nfound=nlist(kernf, nl)) < 0) {    /* kernel name list */
X            fprintf(stderr, errstr, ProgName, kernf,"no name list");
X            exit(EX_SERR);
X        }
X        if (nfound != 0) {
X            register int i;
X
X            fprintf(stderr, "%s: nlist: unresolved symbols:",
X                    ProgName);
X            for (i = 0; i < X_LAST; i++)
X                if (nl[i].n_type == 0)
X                    fprintf(stderr, " %s", nl[i].n_name);
X            (void) putc('\n', stderr);
X            exit(EX_SERR);
X        }
X
X        usrpt = (struct pte *) nl[X_USRPT].n_value;
X        usrptmap = (struct pte *) nl[X_USRPTMAP].n_value;
X        procp = (struct proc *)GetWord((off_t)nl[X_PROC].n_value);
X        nproc = GetWord((off_t)nl[X_NPROC].n_value);
X        /*
X         * We run much faster without reading in the user struct;
X         * the price is incomplete information for errors (no cmd).
X         */
X        if (Fflag && Iflag == 0 && TtyIndx == 0 && CmdIndx == 0)
X            needuser = 0;
X    }
X
X    /*
X     * Read in NPROCS proc structures at-a-time.  Decrement `nproc'
X     * by the number of proc structures we have read; when it reaches
X     * zero, we are finished (return NULL).
X     */
X    do {
X        while (thisproc == 0) {
X            int nread;
X            int psize;
X
X            if (nproc == 0)
X                return((struct ProcInfo *)NULL);
X
X            thisproc = MIN(NPROCS, nproc);
X            psize = thisproc * sizeof(struct proc);
X            nproc -= thisproc;
X            if (lseek(kmem, (off_t)procp, L_SET) == -1 ||
X                (nread = read(kmem, (char *)procs, psize)) < 0) {
X                fprintf(stderr, "%s: read proc: %s\n",
X                        ProgName, SysErr());
X                return((struct ProcInfo *)NULL);
X            } else if (nread != psize) {
X                thisproc = nread / sizeof(struct proc);
X                nproc = 0;
X                fprintf(stderr, "%s: read proc: short read\n",
X                        ProgName);
X            }
X            procsp = procs;
X            procp += thisproc;
X        }
X
X        aproc = procsp++;
X        thisproc--;
X
X        if (aproc->p_stat != 0) {
X            /*
X             * Before we go through the trouble of reading
X             * in the user struct, let's make sure this isn't
X             * a "zombie" or "exiting" process.  If it is,
X             * we have all the information we need; fill in
X             * procinfo and return.
X             */
X            procinfo.pi_flags = 0;
X            procinfo.pi_pid = (pid_T) aproc->p_pid;
X            procinfo.pi_uid = (uid_T) aproc->p_uid;
X
X            if (aproc->p_stat == SZOMB) {        /* zombie */
X                static char *zombie = "<defunct>";
X                procinfo.pi_flags |= PI_ZOMBIE;
X                procinfo.pi_cmd = zombie;
X            } else if (aproc->p_flag & SWEXIT) {    /* exiting */
X                static char *exiting = "<exiting>";
X                procinfo.pi_flags |= PI_SWEXIT;
X                procinfo.pi_cmd = exiting;
X            } else if (!needuser) {            /* Fflag */
X                static char *fflagcmd = "<-f>";
X                procinfo.pi_cmd = fflagcmd;
X            }
X
X            if (procinfo.pi_flags || !needuser)
X                return(&procinfo);
X            else
X                auser = GetUser(aproc);
X        }
X
X    } while (aproc->p_stat == 0 || auser == NULL);
X
X    /*
X     * We now have a process (`aproc') and a user (`auser').
X     * Fill in the rest of `procinfo'.
X     */
X    if (auser->u_ttyp != 0) {    /* has a controlling tty */
X        procinfo.pi_flags |= PI_CTLTTY;
X        procinfo.pi_tty = (tty_T) auser->u_ttyd;
X    }
X
X    if (aproc->p_pid < pidmapsiz) {    /* special */
X        procinfo.pi_cmd = pidmap[aproc->p_pid];
X        procinfo.pi_flags |= PI_ASKUSR;
X    } else                 /* set path-stripped command name */
X        SETCMD(procinfo.pi_cmd, auser->u_comm, MAXCOMLEN)
X
X    return(&procinfo);
X}
X
X#define    SKRD(file, src, dst, size)            \
X    (lseek(file, (off_t)(src), L_SET) == -1) ||    \
X    (read(file, (char *)(dst), (size)) != (size))
X
X/*
X * GetWord(loc)
X *
X * Read in word at `loc' from kernel virtual memory.
X * If an error occurs, call exit(2) with EX_SERR.
X */
Xstatic int
XGetWord(loc)
X    off_t loc;
X{
X    int val;
X
X    if (SKRD(kmem, loc, &val, sizeof(val))) {
X        fprintf(stderr, "%s: can't read word at %lx in %s\n",
X                ProgName, (u_long)loc, kmemf);
X        exit(EX_SERR);
X    }
X    return (val);
X}
X
X#ifndef    CLBYTES
X#define    CLBYTES    (CLSIZE*NBPG)
X#endif
X
X/*
X * GetUser(aproc)
X *
X * Read in the user struct for `aproc' and return a pointer to it.
X * If an error occurs, return NULL.
X */
X#define    SW_UADDR    dtob(aproc->p_swaddr)
X#define    SW_UBYTES    sizeof(struct userx)
X
Xstruct userx {
X    char userfill[UPAGES * NBPG - sizeof(struct user)];
X    struct user user;
X};
X#define REDSIZE (CLSIZE * 2)
X
Xstatic struct user *
XGetUser(aproc)
X    struct proc *aproc;
X{
X    static char *WarnMsg = "Warning: can't read ";
X    union u {
X        struct userx user;
X        char    upgs[UPAGES][NBPG * CLSIZE];
X    } u;
X    static struct pte apte, uptes[HIGHPAGES + CLSIZE + REDSIZE];
X    register int ncl, i;
X
X    /*
X     * If process is not in core, we simply snarf it's user struct
X     * from the swap device.
X     */
X    if ((aproc->p_flag & SLOAD) == 0) {
X        if (SKRD(swap, SW_UADDR, &u, SW_UBYTES)) {
X            if (Wflag)
X                printf("%su for pid %d from %s\n",
X                       WarnMsg, aproc->p_pid, swapf);
X            return ((struct user *)NULL);
X        }
X        return (&u.user.user);
X    }
X
X    /*
X     * Process is in core.  First read from the user page-table
X     * map for this process to get the u-area page table entry.
X     * Next, read in the page table entries that map the u-area.
X     * Finally, read in the physical pages that comprise the u-area.
X     *
X     * If at any time, an lseek() or read() fails, print a warning
X     * message (if `Wflag' is set) and return NULL.
X     */
X    if (SKRD(kmem, &usrptmap[btokmx(aproc->p_p0br) + aproc->p_szpt - 1],
X             &apte, sizeof(apte))) {
X        if (Wflag)
X            printf("%sindir pte of user pt for pid %d from %s\n",
X                   WarnMsg, aproc->p_pid, kmemf);
X        return ((struct user *)NULL);
X    }
X
X    if (SKRD(mem, ctob(apte.pg_pfnum+1) - sizeof(uptes),
X             uptes, sizeof(uptes))) {
X        if (Wflag)
X            printf("%suser pt for pid %d from %s\n",
X                   WarnMsg, aproc->p_pid, memf);
X        return ((struct user *)NULL);
X    }
X
X    /*
X     * Set `ncl' to the (rounded up) number of u-area page clusters
X     * to read, and then read in this user struct (in reverse).
X     */
X    ncl = (SW_UBYTES + NBPG * CLSIZE - 1) / (NBPG * CLSIZE);
X    while (--ncl >= 0) {
X        i = ncl * CLSIZE;
X        if (SKRD(mem,ctob(uptes[CLSIZE+REDSIZE+i].pg_pfnum),
X             u.upgs[i],CLBYTES)){
X            if (Wflag)
X                printf("%suser page %u for pid %d from %s\n",
X                       WarnMsg,
X                       uptes[CLSIZE+REDSIZE+i].pg_pfnum,
X                       aproc->p_pid, memf);
X            return((struct user *)NULL);
X        }
X    }
X    return (&u.user.user);
X}
END_OF_FILE
if test 11465 -ne `wc -c <'machdep/aos-43.c'`; then
    echo shar: \"'machdep/aos-43.c'\" unpacked with wrong size!
fi
# end of 'machdep/aos-43.c'
fi
if test -f 'machdep/bsd-43.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'machdep/bsd-43.c'\"
else
echo shar: Extracting \"'machdep/bsd-43.c'\" \(12470 characters\)
sed "s/^X//" >'machdep/bsd-43.c' <<'END_OF_FILE'
X#ifndef lint
Xstatic char rcsid[] = "$Header: bsd-43.c,v 1.9 1994/06/26 04:15:06 forys Exp $";
X#endif
X
X/*
X**  This program may be freely redistributed for noncommercial purposes.
X**  This entire comment MUST remain intact.
X**
X**  Copyright 1994 by Jeff Forys ([e-mail])
X*/
X
X#define    NO_MEXTERN
X#include "conf.h"
X#undef    NO_MEXTERN
X
X#include <sys/user.h>
X#include <sys/proc.h>
X
X#include <stdio.h>
X
X/*
X * Define SigNames, NSig, and TtyDevDir here; they are used by other
X * routines and must be global.  Everyone seems to have their own
X * idea as to what NSIG should be.  Here, `NSig' is the number of
X * signals available, not counting zero.
X */
Xchar *SigMap[] = { "0",
X    "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",        /*  1 -  6 */
X    "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",        /*  7 - 12 */
X    "PIPE", "ALRM", "TERM", "URG", "STOP", "TSTP",        /* 13 - 18 */
X    "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",        /* 19 - 24 */
X    "XFSZ", "VTALRM", "PROF", "WINCH", "29", "USR1",    /* 25 - 30 */
X    "USR2", "32",                        /* 31 - 32 */
X};
Xint NSig = NSIG;
X
X#define    SETCMD(dst,src,maxlen) {            \
X    extern char *rindex();                \
X    if (maxlen > 0) src[maxlen] = '\0';        \
X    dst = (dst = rindex(src, '/')) ? ++dst: src;    \
X}
X
Xstatic char *TtyDevDir = "/dev";
X
Xint    Skill;            /* set 1 if running `skill', 0 if `snice' */
Xint    PrioMin, PrioMax;    /* min and max process priorities */
Xint    SigPri;            /* signal to send or priority to set */
Xpid_T    MyPid;            /* pid of this process */
Xuid_T    MyUid;            /* uid of this process */
Xchar    *ProgName;        /* program name */
X
X/*
X * This is the machine-dependent initialization routine.
X *
X *   - The following global variables must be initialized:
X *     MyPid, MyUid, ProgName, Skill, PrioMin, PrioMax, SigPri
X *   - The working directory will be changed to that which contains the
X *     tty devices (`TtyDevDir'); this makes argument parsing go faster.
X *   - If possible, this routine should raise the priority of this process.
X */
Xvoid
XMdepInit(pname)
X    char *pname;
X{
X    extern char *rindex(), *SysErr();
X
X    MyPid = (pid_T) getpid();
X    MyUid = (uid_T) getuid();
X    SETCMD(ProgName, pname, 0)
X
X    /*
X     * If we are running as root, raise our priority to better
X     * catch runaway processes.
X     */
X    if (MyUid == ROOTUID)
X        (void) setpriority(PRIO_PROCESS, MyPid, PRIO_MIN);
X
X    /*
X     * Determine what we are doing to processes we find.  We will
X     * either send them a signal (skill), or renice them (snice).
X     */
X    Skill = (strcmp(ProgName, "snice") != 0);
X
X    /*
X     * chdir to `TtyDevDir' to speed up tty argument parsing.
X     */
X    if (chdir(TtyDevDir) < 0) {
X        fprintf(stderr, "%s: chdir(%s): %s\n", ProgName, TtyDevDir,
X                SysErr());
X        exit(EX_SERR);
X    }
X
X    /*
X     * Set up minimum and maximum process priorities.
X     * Initialize SigPri to either default signal (`skill') or
X     * default priority (`snice').
X     */
X    PrioMin = PRIO_MIN;
X    PrioMax = PRIO_MAX;
X    SigPri = Skill? SIGTERM: 4;
X}
X
X/*
X * Carry out an action on a particular process.  If this is `skill',
X * then send the process a signal, otherwise this is `snice' so change
X * it's priority.
X *
X * If 0 is returned, the operation was successful, otherwise -1 is
X * returned and `errno' set.
X */
Xint
XMdepAction(pid)
X    pid_T pid;
X{
X    if (Skill)
X        return(kill((int)pid, SigPri));
X    else
X        return(setpriority(PRIO_PROCESS, (int)pid, SigPri));
X}
X
X/*
X * Now, set up everything we need to write a GetProc() routine.
X */
X
X#include <sys/file.h>
X#include <sys/vm.h>
X
X#include <machine/pte.h>
X
X#include <nlist.h>
X
Xstatic char *kmemf =    "/dev/kmem";    /* window into kernel virtual memory */
Xstatic char *memf =    "/dev/mem";    /* window into physical memory */
Xstatic char *swapf =    "/dev/drum";    /* paging device */
Xstatic char *kernf =    "/vmunix";    /* kernel image */
Xstatic int kmem = 0, mem = 0, swap = 0;
X
Xstatic struct nlist nl[] = {
X    { "_nproc" },
X#define    X_NPROC        0
X    { "_proc" },
X#define    X_PROC        1
X    { "_Usrptmap" },
X#define    X_USRPTMAP    2
X    { "_usrpt" },
X#define    X_USRPT        3
X#ifndef hp800
X    { "" },
X#define    X_LAST        4
X#else
X    { "_ubase" },
X#define    X_UBASE        4
X    { "" },
X#define    X_LAST        5
X#endif
X};
X
Xstatic    int    nproc = -1;
Xstatic    struct    proc *procp;
Xstatic    struct    pte *usrptmap, *usrpt;
X#ifdef hp800
Xstatic    int    ubase;
X#endif
X
X#define    NPROCS    32            /* number of procs to read at once */
X
Xstatic    char    *pidmap[] = { "swapper", "init", "pagedaemon" };
Xstatic    int    pidmapsiz = sizeof(pidmap) / sizeof(pidmap[0]);
X
Xextern    off_t lseek();
X
X/*
X * GetProc()
X *
X * Fill in and return a `struct ProcInfo' with information about the
X * next process.  If no processes are left, return NULL.
X *
X * Fflag support:
X *    If Fflag is set we will try to avoid reading in the user struct.
X *    We can do this only if Iflag, TtyIndx, and CmdIndx are zero.
X */
Xstruct ProcInfo *
XGetProc()
X{
X    extern char *SysErr();
X    static struct user *GetUser();
X    static struct proc procs[NPROCS], *procsp;
X    static struct ProcInfo procinfo;
X    register struct user *auser;
X    register struct proc *aproc;
X    static int thisproc = 0;
X    static int needuser = 1;        /* Fflag support */
X
X    /*
X     * If this is our first time here, open various files,
X     * and set up the nlist.
X     */
X    if (nproc == -1) {
X        char *errstr = "%s: %s: %s\n";
X        int nfound;
X
X        if ((kmem=open(kmemf, 0)) < 0) {    /* open kmem */
X            fprintf(stderr, errstr, ProgName, kmemf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((mem=open(memf, 0)) < 0) {        /* open mem */
X            fprintf(stderr, errstr, ProgName, memf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((swap=open(swapf, 0)) < 0) {    /* open swap device */
X            fprintf(stderr, errstr, ProgName, swapf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((nfound=nlist(kernf, nl)) < 0) {    /* kernel name list */
X            fprintf(stderr, errstr, ProgName, kernf,"no name list");
X            exit(EX_SERR);
X        }
X        if (nfound != 0) {
X            register int i;
X
X            fprintf(stderr, "%s: nlist: unresolved symbols:",
X                    ProgName);
X            for (i = 0; i < X_LAST; i++)
X                if (nl[i].n_type == 0)
X                    fprintf(stderr, " %s", nl[i].n_name);
X            (void) putc('\n', stderr);
X            exit(EX_SERR);
X        }
X
X        usrpt = (struct pte *) nl[X_USRPT].n_value;
X        usrptmap = (struct pte *) nl[X_USRPTMAP].n_value;
X        procp = (struct proc *)GetWord((off_t)nl[X_PROC].n_value);
X        nproc = GetWord((off_t)nl[X_NPROC].n_value);
X#ifdef hp800
X        ubase = nl[X_UBASE].n_value;
X#endif
X        /*
X         * We run much faster without reading in the user struct;
X         * the price is incomplete information for errors (no cmd).
X         */
X        if (Fflag && Iflag == 0 && TtyIndx == 0 && CmdIndx == 0)
X            needuser = 0;
X    }
X
X    /*
X     * Read in NPROCS proc structures at-a-time.  Decrement `nproc'
X     * by the number of proc structures we have read; when it reaches
X     * zero, we are finished (return NULL).
X     */
X    do {
X        while (thisproc == 0) {
X            int nread;
X            int psize;
X
X            if (nproc == 0)
X                return((struct ProcInfo *)NULL);
X
X            thisproc = MIN(NPROCS, nproc);
X            psize = thisproc * sizeof(struct proc);
X            nproc -= thisproc;
X            if (lseek(kmem, (off_t)procp, L_SET) == -1 ||
X                (nread = read(kmem, (char *)procs, psize)) < 0) {
X                fprintf(stderr, "%s: read proc: %s\n",
X                        ProgName, SysErr());
X                return((struct ProcInfo *)NULL);
X            } else if (nread != psize) {
X                thisproc = nread / sizeof(struct proc);
X                nproc = 0;
X                fprintf(stderr, "%s: read proc: short read\n",
X                        ProgName);
X            }
X            procsp = procs;
X            procp += thisproc;
X        }
X
X        aproc = procsp++;
X        thisproc--;
X
X        if (aproc->p_stat != 0) {
X            /*
X             * Before we go through the trouble of reading
X             * in the user struct, let's make sure this isn't
X             * a "zombie" or "exiting" process.  If it is,
X             * we have all the information we need; fill in
X             * procinfo and return.
X             */
X            procinfo.pi_flags = 0;
X            procinfo.pi_pid = (pid_T) aproc->p_pid;
X            procinfo.pi_uid = (uid_T) aproc->p_uid;
X
X            if (aproc->p_stat == SZOMB) {        /* zombie */
X                static char *zombie = "<defunct>";
X                procinfo.pi_flags |= PI_ZOMBIE;
X                procinfo.pi_cmd = zombie;
X            } else if (aproc->p_flag & SWEXIT) {    /* exiting */
X                static char *exiting = "<exiting>";
X                procinfo.pi_flags |= PI_SWEXIT;
X                procinfo.pi_cmd = exiting;
X            } else if (!needuser) {            /* Fflag */
X                static char *fflagcmd = "<-f>";
X                procinfo.pi_cmd = fflagcmd;
X            }
X
X            if (procinfo.pi_flags || !needuser)
X                return(&procinfo);
X            else
X                auser = GetUser(aproc);
X        }
X
X    } while (aproc->p_stat == 0 || auser == NULL);
X
X    /*
X     * We now have a process (`aproc') and a user (`auser').
X     * Fill in the rest of `procinfo'.
X     */
X    if (auser->u_ttyp != 0) {    /* has a controlling tty */
X        procinfo.pi_flags |= PI_CTLTTY;
X        procinfo.pi_tty = (tty_T) auser->u_ttyd;
X    }
X
X    if (aproc->p_pid < pidmapsiz) {    /* special */
X        procinfo.pi_cmd = pidmap[aproc->p_pid];
X        procinfo.pi_flags |= PI_ASKUSR;
X    } else                 /* set path-stripped command name */
X        SETCMD(procinfo.pi_cmd, auser->u_comm, MAXCOMLEN)
X
X    return(&procinfo);
X}
X
X#define    SKRD(file, src, dst, size)            \
X    (lseek(file, (off_t)(src), L_SET) == -1) ||    \
X    (read(file, (char *)(dst), (size)) != (size))
X
X/*
X * GetWord(loc)
X *
X * Read in word at `loc' from kernel virtual memory.
X * If an error occurs, call exit(2) with EX_SERR.
X */
Xstatic int
XGetWord(loc)
X    off_t loc;
X{
X    int val;
X
X    if (SKRD(kmem, loc, &val, sizeof(val))) {
X        fprintf(stderr, "%s: can't read word at %lx in %s\n",
X                ProgName, (u_long)loc, kmemf);
X        exit(EX_SERR);
X    }
X    return (val);
X}
X
X#ifndef    CLBYTES
X#define    CLBYTES    (CLSIZE*NBPG)
X#endif
X
X/*
X * GetUser(aproc)
X *
X * Read in the user struct for `aproc' and return a pointer to it.
X * If an error occurs, return NULL.
X */
X#ifndef hp800
X
X#define    SW_UADDR    dtob(aproc->p_swaddr)
X#define    SW_UBYTES    sizeof(struct user)
X
Xstatic struct user *
XGetUser(aproc)
X    struct proc *aproc;
X{
X    static char *WarnMsg = "Warning: can't read ";
X    static union {
X        struct user user;
X        char upgs[UPAGES][NBPG];
X    } u;
X    static struct pte apte, uptes[HIGHPAGES+CLSIZE];
X    register int ncl, i;
X
X    /*
X     * If process is not in core, we simply snarf it's user struct
X     * from the swap device.
X     */
X    if ((aproc->p_flag & SLOAD) == 0) {
X        if (SKRD(swap, SW_UADDR, &u.user, SW_UBYTES)) {
X            if (Wflag)
X                printf("%su for pid %d from %s\n",
X                       WarnMsg, aproc->p_pid, swapf);
X            return ((struct user *)NULL);
X        }
X        return (&u.user);
X    }
X
X    /*
X     * Process is in core.  First read from the user page-table
X     * map for this process to get the u-area page table entry.
X     * Next, read in the page table entries that map the u-area.
X     * Finally, read in the physical pages that comprise the u-area.
X     *
X     * If at any time, an lseek() or read() fails, print a warning
X     * message (if `Wflag' is set) and return NULL.
X     */
X    if (SKRD(kmem, &usrptmap[btokmx(aproc->p_p0br) + aproc->p_szpt - 1],
X             &apte, sizeof(apte))) {
X        if (Wflag)
X            printf("%sindir pte of user pt for pid %d from %s\n",
X                   WarnMsg, aproc->p_pid, kmemf);
X        return ((struct user *)NULL);
X    }
X
X    if (SKRD(mem, ctob(apte.pg_pfnum+1) - sizeof(uptes),
X             uptes, sizeof(uptes))) {
X        if (Wflag)
X            printf("%suser pt for pid %d from %s\n",
X                   WarnMsg, aproc->p_pid, memf);
X        return ((struct user *)NULL);
X    }
X
X    /*
X     * Set `ncl' to the (rounded up) number of u-area page clusters
X     * to read, and then read in this user struct (in reverse).
X     */
X    ncl = (sizeof(struct user) + CLBYTES - 1) / CLBYTES;
X    while (--ncl >= 0) {
X        i = ncl * CLSIZE;
X        if (SKRD(mem,ctob(uptes[CLSIZE+i].pg_pfnum),u.upgs[i],CLBYTES)){
X            if (Wflag)
X                printf("%suser page %u for pid %d from %s\n",
X                       WarnMsg, uptes[CLSIZE+i].pg_pfnum,
X                       aproc->p_pid, memf);
X            return((struct user *)NULL);
X        }
X    }
X    return (&u.user);
X}
X#else    /* hp800 and Inverted Page Tables */
X
X#undef    pindx
X#define    pindx(p)    ((p)->p_ndx)
X
X#define    SW_UADDR    dtob(aproc->p_swaddr + ctod(btoc(KSTAKSIZE*CLBYTES)))
X#define    SW_UBYTES    sizeof(struct user)
X
Xstatic struct user *
XGetUser(aproc)
X    struct proc *aproc;
X{
X    static char *WarnMsg = "Warning: can't read ";
X    static union {
X        struct user user;
X        char upgs[UPAGES][NBPG];
X    } u;
X
X    /*
X     * If process is not in core, we simply snarf it's user struct
X     * from the swap device.
X     */
X    if ((aproc->p_flag & SLOAD) == 0) {
X        if (SKRD(swap, SW_UADDR, &u.user, SW_UBYTES)) {
X            if (Wflag)
X                printf("%su for pid %d from %s\n",
X                       WarnMsg, aproc->p_pid, swapf);
X            return ((struct user *)NULL);
X        }
X        return (&u.user);
X    }
X
X    /*
X     * Process is in core.
X     *
X     * User struct is not mapped into user space,
X     * must be read from kernel VA space.
X     */
X    if (SKRD(kmem, uvadd(aproc), &u.user, sizeof(struct user))) {
X        if (Wflag)
X            printf("%su for pid %d from %s\n",
X                   WarnMsg, aproc->p_pid, kmemf);
X        return ((struct user *)NULL);
X    }
X
X    return (&u.user);
X}
X#endif
END_OF_FILE
if test 12470 -ne `wc -c <'machdep/bsd-43.c'`; then
    echo shar: \"'machdep/bsd-43.c'\" unpacked with wrong size!
fi
# end of 'machdep/bsd-43.c'
fi
if test -f 'machdep/irix-3.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'machdep/irix-3.c'\"
else
echo shar: Extracting \"'machdep/irix-3.c'\" \(12967 characters\)
sed "s/^X//" >'machdep/irix-3.c' <<'END_OF_FILE'
X#ifndef lint
Xstatic char rcsid[] = "$Header: irix-3.c,v 1.8 1994/06/26 04:16:15 forys Exp $";
X#endif
X
X/*
X**  This program may be freely redistributed for noncommercial purposes.
X**  This entire comment MUST remain intact.
X**
X**  Copyright 1994 by Jeff Forys ([e-mail])
X*/
X
X#define    NO_MEXTERN
X#include "conf.h"
X#undef    NO_MEXTERN
X
X#include <sys/dir.h>
X#include <sys/user.h>
X#include <sys/proc.h>
X
X#include <stdio.h>
X
X/*
X * Define SigNames, NSig, and TtyDevDir here; they are used by other
X * routines and must be global.  Everyone seems to have their own
X * idea as to what NSIG should be.  Here, `NSig' is the number of
X * signals available, not counting zero.
X */
Xchar *SigMap[] = { "0",
X    "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",        /*  1 -  6 */
X    "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",        /*  7 - 12 */
X    "PIPE", "ALRM", "TERM", "USR1", "USR2", "CHLD",        /* 13 - 18 */
X    "PWR", "STOP", "TSTP", "POLL", "IO", "URG",        /* 19 - 24 */
X    "WINCH", "VTALRM", "PROF", "CONT", "TTIN", "TTOU",    /* 25 - 30 */
X    "XCPU", "XFSZ",                        /* 31 - 32 */
X};
Xint NSig = NUMSIGS;
X
X#define    SETCMD(dst,src,maxlen) {            \
X    extern char *rindex();                \
X    if (maxlen > 0) src[maxlen] = '\0';        \
X    dst = (dst = rindex(src, '/')) ? ++dst: src;    \
X}
X
Xstatic char *TtyDevDir = "/dev";
X
Xint    Skill;            /* set 1 if running `skill', 0 if `snice' */
Xint    PrioMin, PrioMax;    /* min and max process priorities */
Xint    SigPri;            /* signal to send or priority to set */
Xpid_T    MyPid;            /* pid of this process */
Xuid_T    MyUid;            /* uid of this process */
Xchar    *ProgName;        /* program name */
X
X/*
X * This is the machine-dependent initialization routine.
X *
X *   - The following global variables must be initialized:
X *     MyPid, MyUid, ProgName, Skill, PrioMin, PrioMax, SigPri
X *   - The working directory will be changed to that which contains the
X *     tty devices (`TtyDevDir'); this makes argument parsing go faster.
X *   - If possible, this routine should raise the priority of this process.
X */
Xvoid
XMdepInit(pname)
X    char *pname;
X{
X    extern char *rindex(), *SysErr();
X
X    MyPid = (pid_T) getpid();
X    MyUid = (uid_T) getuid();
X    SETCMD(ProgName, pname, 0)
X
X    /*
X     * If we are running as root, raise our priority to better
X     * catch runaway processes.
X     */
X    if (MyUid == ROOTUID)
X        (void) setpriority(PRIO_PROCESS, MyPid, PRIO_MIN);
X
X    /*
X     * Determine what we are doing to processes we find.  We will
X     * either send them a signal (skill), or renice them (snice).
X     */
X    Skill = (strcmp(ProgName, "snice") != 0);
X
X    /*
X     * chdir to `TtyDevDir' to speed up tty argument parsing.
X     */
X    if (chdir(TtyDevDir) < 0) {
X        fprintf(stderr, "%s: chdir(%s): %s\n", ProgName, TtyDevDir,
X                SysErr());
X        exit(EX_SERR);
X    }
X
X    /*
X     * Set up minimum and maximum process priorities.
X     * Initialize SigPri to either default signal (`skill') or
X     * default priority (`snice').
X     */
X    PrioMin = PRIO_MIN;
X    PrioMax = PRIO_MAX;
X    SigPri = Skill? SIGTERM: 4;
X}
X
X/*
X * Carry out an action on a particular process.  If this is `skill',
X * then send the process a signal, otherwise this is `snice' so change
X * it's priority.
X *
X * If 0 is returned, the operation was successful, otherwise -1 is
X * returned and `errno' set.
X */
Xint
XMdepAction(pid)
X    pid_T pid;
X{
X    if (Skill)
X        return(kill((int)pid, SigPri));
X    else
X        return(setpriority(PRIO_PROCESS, (int)pid, SigPri));
X}
X
X/*
X * Now, set up everything we need to write a GetProc() routine.
X */
X
X#include <sys/immu.h>
X#include <sys/swap.h>
X#include <sys/file.h>
X#include <sys/stat.h>
X#include <sys/sysmacros.h>
X
X#include <nlist.h>
X
Xstatic char *kmemf =    "/dev/kmem";    /* window into kernel virtual memory */
Xstatic char *memf =    "/dev/mem";    /* window into physical memory */
Xstatic char *kernf =    "/unix";    /* kernel image */
Xstatic char *devdskf =    "/dev/dsk";    /* where swap devices can be found */
Xstatic int kmem = 0, mem = 0;
X
Xstatic struct nlist nl[] = {
X    { "v" },
X#define    X_VAR        0
X    { "proc" },
X#define    X_PROC        1
X    { "swaptab" },
X#define    X_SWAPTAB    2
X    { "" },
X#define    X_LAST        3
X};
X
Xstatic    int    nproc = -1;
Xstatic    struct    proc *procp;
Xstatic    swpt_t    swtab[MSFILES];        /* available swap devices */
Xstatic    dev_t    swdev[MSFILES];        /* opened swap devices */
X
X#define    NPROCS    32            /* number of procs to read at once */
X
Xstatic    char    *pidmap[] = { "sched", "init", "vhand", "bdflush" };
Xstatic    int    pidmapsiz = sizeof(pidmap) / sizeof(pidmap[0]);
X
Xextern    off_t lseek();
X
X/*
X * GetProc()
X *
X * Fill in and return a `struct ProcInfo' with information about the
X * next process.  If no processes are left, return NULL.
X *
X * Fflag support:
X *      If Fflag is set we will try to avoid reading in the user struct
X *    and locating/opening the swap device(s).
X *      We can do this only if Iflag, TtyIndx, and CmdIndx are zero.
X */
Xstruct ProcInfo *
XGetProc()
X{
X    extern char *SysErr();
X    static struct user *GetUser();
X    static struct proc procs[NPROCS], *procsp;
X    static struct ProcInfo procinfo;
X    static struct var var;
X    register struct user *auser;
X    register struct proc *aproc;
X    static int thisproc = 0;
X    static int needuser = 1;        /* Fflag support */
X
X    /*
X     * If this is our first time here, open various files,
X     * and set up the nlist.
X     */
X    if (nproc == -1) {
X        char *errstr = "%s: %s: %s\n";
X        int nfound;
X
X        if ((kmem=open(kmemf, 0)) < 0) {    /* open kmem */
X            fprintf(stderr, errstr, ProgName, kmemf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((mem=open(memf, 0)) < 0) {        /* open mem */
X            fprintf(stderr, errstr, ProgName, memf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((nfound=nlist(kernf, nl)) < 0) {    /* kernel name list */
X            fprintf(stderr, errstr, ProgName, kernf,"no name list");
X            exit(EX_SERR);
X        }
X
X        if (nfound != 0) {
X            register int i;
X
X            fprintf(stderr, "%s: nlist: unresolved symbols:",
X                    ProgName);
X            for (i = 0; i < X_LAST; i++)
X                if (nl[i].n_type == 0)
X                    fprintf(stderr, " %s", nl[i].n_name);
X            (void) putc('\n', stderr);
X            exit(EX_SERR);
X        }
X
X        GetStruct((off_t)svirtophys(nl[X_VAR].n_value), "var",
X                  (off_t)&var, sizeof(var));
X        GetStruct((off_t)svirtophys(nl[X_SWAPTAB].n_value), "swaptab",
X                  (off_t)swtab, sizeof(swtab));
X        procp = (struct proc *)svirtophys(nl[X_PROC].n_value);
X        nproc = var.v_proc;
X
X        /*
X         * We run faster without finding/opening the swap devices
X         * and reading in the user struct; the price is incomplete
X         * information for errors (no cmd).
X         */
X        if (Fflag && Iflag == 0 && TtyIndx == 0 && CmdIndx == 0)
X            needuser = 0;
X        else
X            OpenSwapDevs();
X    }
X
X    /*
X     * Read in NPROCS proc structures at-a-time.  Decrement `nproc'
X     * by the number of proc structures we have read; when it reaches
X     * zero, we are finished (return NULL).
X     */
X    do {
X        while (thisproc == 0) {
X            int nread;
X            int psize;
X
X            if (nproc == 0)
X                return((struct ProcInfo *)NULL);
X
X            thisproc = MIN(NPROCS, nproc);
X            psize = thisproc * sizeof(struct proc);
X            nproc -= thisproc;
X            if (lseek(kmem, (off_t)procp, L_SET) == -1 ||
X                (nread = read(kmem, (char *)procs, psize)) < 0) {
X                fprintf(stderr, "%s: read proc: %s\n",
X                        ProgName, SysErr());
X                return((struct ProcInfo *)NULL);
X            } else if (nread != psize) {
X                thisproc = nread / sizeof(struct proc);
X                nproc = 0;
X                fprintf(stderr, "%s: read proc: short read\n",
X                        ProgName);
X            }
X            procsp = procs;
X            procp += thisproc;
X        }
X
X        aproc = procsp++;
X        thisproc--;
X
X        if (aproc->p_stat != 0) {
X            /*
X             * Before we go through the trouble of reading
X             * in the user struct, let's make sure this isn't
X             * a "zombie" or "exiting" process.  If it is,
X             * we have all the information we need; fill in
X             * procinfo and return.
X             */
X            procinfo.pi_flags = 0;
X            procinfo.pi_pid = (pid_T) aproc->p_pid;
X            procinfo.pi_uid = (uid_T) aproc->p_uid;
X
X            if (aproc->p_stat == SZOMB) {        /* zombie */
X                static char *zombie = "<defunct>";
X                procinfo.pi_flags |= PI_ZOMBIE;
X                procinfo.pi_cmd = zombie;
X            } else if (aproc->p_flag & SEXIT) {    /* exiting */
X                static char *exiting = "<exiting>";
X                procinfo.pi_flags |= PI_SWEXIT;
X                procinfo.pi_cmd = exiting;
X            } else if (!needuser) {            /* Fflag */
X                static char *fflagcmd = "<-f>";
X                procinfo.pi_cmd = fflagcmd;
X            }
X
X            if (procinfo.pi_flags || !needuser)
X                return(&procinfo);
X            else
X                auser = GetUser(aproc);
X        }
X
X    } while (aproc->p_stat == 0 || auser == NULL);
X
X    /*
X     * We now have a process (`aproc') and a user (`auser').
X     * Fill in the rest of `procinfo'.
X     */
X    if (auser->u_ttyp != 0) {    /* has a controlling tty */
X        procinfo.pi_flags |= PI_CTLTTY;
X        procinfo.pi_tty = (tty_T) auser->u_ttyd;
X    }
X
X    if (aproc->p_pid < pidmapsiz) {    /* special */
X        procinfo.pi_cmd = pidmap[aproc->p_pid];
X        procinfo.pi_flags |= PI_ASKUSR;
X    } else                 /* set path-stripped command name */
X        SETCMD(procinfo.pi_cmd, auser->u_comm, PSCOMSIZ)
X
X    return(&procinfo);
X}
X
X#define    SKRD(file, src, dst, size)            \
X    (lseek(file, (off_t)(src), L_SET) == -1) ||    \
X    (read(file, (char *)(dst), (size)) != (size))
X
XGetStruct(loc, name, dest, size)
X    off_t loc;
X    char *name;
X    off_t dest;
X    int size;
X{
X    if (SKRD(kmem, loc, dest, size)) {
X        fprintf(stderr, "%s: can't read %s struct at %lx in %s\n",
X                ProgName, name, (u_long)loc, kmemf);
X        exit(EX_SERR);
X    }
X}
X
X/*
X * OpenSwapDevs()
X *
X * Locate and open all the swap devices currently configured.
X * The opened file descriptors are saved in `swdev[i]'.
X *
X * Side Effect: this routine does a chdir(devdskf).
X */
XOpenSwapDevs()
X{
X    extern char *SysErr();
X    struct stat statb;
X    register DIR *devdsk;
X    register struct direct *dp;
X    register char *flnm;
X    register int i, keeplooking = 1;
X
X    /*
X     * Initialize all file descriptors to "unopened".
X     */
X    for (i = 0; i < MSFILES; i++)
X        swdev[i] = -1;
X
X    /*
X     * Relocate our current working directory to `devdskf' and open
X     * the directory for reading it's contents.
X     */
X    if (chdir(devdskf) < 0) {
X        fprintf(stderr, "%s: can't change dir to %s: %s\n",
X                ProgName, devdskf, SysErr());
X        return;
X    }
X    if ((devdsk = opendir(".")) == NULL) {
X        fprintf(stderr, "%s: can't open %s: %s\n",
X                    ProgName, devdskf, SysErr());
X        return;
X    }
X
X    /*
X     * For each directory entry, if it is one of our swap devices,
X     * try to open it.
X     */
X    while ((dp = readdir(devdsk)) != NULL && keeplooking) {
X        flnm = dp->d_name;
X        if (stat(flnm, &statb) < 0)    /* who knows, who cares... */
X            continue;
X        keeplooking = 0;
X        for (i = 0; i < MSFILES; i++) {
X            if (swdev[i] < 0 && S_ISBLK(statb.st_mode) &&
X                swtab[i].st_dev == statb.st_rdev)
X                if ((swdev[i] = open(flnm, 0)) < 0)
X                    fprintf(stderr,
X                            "%s: can't open %s/%s: %s\n",
X                            ProgName,devdskf,flnm,SysErr());
X
X            if (swtab[i].st_dev && swdev[i] < 0)
X                keeplooking = 1;
X        }
X    }
X
X    /*
X     * Lastly, see if there were any swap devices we could not locate.
X     */
X    if (keeplooking) {
X        for (i = 0; i < MSFILES; i++)
X            if (swtab[i].st_dev && swdev[i] < 0)
X                fprintf(stderr,
X                "%s: can't open swap device %d,%d\n", ProgName,
X                major(swtab[i].st_dev), minor(swtab[i].st_dev));
X    }
X    closedir(devdsk);
X}
X
X/*
X * GetUser(aproc)
X *
X * Read in the user struct for `aproc' and return a pointer to it.
X * If an error occurs, return NULL.
X */
Xstatic struct user *
XGetUser(aproc)
X    struct proc *aproc;
X{
X    static char *WarnMsg = "Warning: can't read ";
X    static union {
X        struct user user;
X        char upgs[USIZE][NBPP];
X    } u;
X    register int i, pgtype, file, swapi;
X    register u_int addr;
X    register char *flnm;
X
X    /*
X     * aproc->p_upgs has the pdes for the u-area.  Also, encoded into
X     * the pde is the key to the location of these pages.  If the disk
X     * block descriptor is of type DBD_NONE, then the pages are in
X     * core.  If they are of type DBD_SWAP they are out on swap device
X     * number `dbd_swpi' at logical block number `dbd_pgno'.  This is
X     * actually pretty cool, except that each swap partition must be
X     * treated separately (so we had to open all of them).
X     *
X     * If at any time, an lseek() or read() fails, print a warning
X     * message (if `Wflag' is set) and return NULL.
X     */
X    for (i = 0; i < USIZE; i++) {
X        pgtype = pdetodbd(&aproc->p_upgs[i])->dbd_type;
X        switch (pgtype) {
X            case DBD_NONE:    /* in core */
X            addr = aproc->p_upgs[i].pgm.pg_pfn*NBPP;
X            file = mem;
X            flnm = memf;
X            break;
X            case DBD_SWAP:    /* swapped out */
X            /*
X             * I assume that it's necessary to add in `st_swplo'
X             * in case our logical swap partition starts at a
X             * block offset other than zero.  The include files
X             * werent clear on this, so I guessed.  ..jef
X             */
X            swapi = aproc->p_upgs[i].pgm.dbd.dbd_swpi;
X            addr = BBTOB(aproc->p_upgs[i].pgm.dbd.dbd_pgno +
X                         swtab[swapi].st_swplo);
X            file = swdev[swapi];
X            flnm = "swap";
X            break;
X            default:        /* other (impossible?) things */
X            if (Wflag)
X                printf("%suser page of type %d for pid %d\n",
X                       WarnMsg, pgtype, aproc->p_pid);
X            return((struct user *)NULL);
X        }
X        if (SKRD(file, addr, u.upgs[i], NBPP)) {
X            if (Wflag)
X                printf("%suser page %u for pid %d from %s\n",
X                       WarnMsg, addr/NBPP, aproc->p_pid, flnm);
X            return((struct user *)NULL);
X        }
X    }
X    return (&u.user);
X}
END_OF_FILE
if test 12967 -ne `wc -c <'machdep/irix-3.c'`; then
    echo shar: \"'machdep/irix-3.c'\" unpacked with wrong size!
fi
# end of 'machdep/irix-3.c'
fi
if test -f 'machdep/irix-4.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'machdep/irix-4.c'\"
else
echo shar: Extracting \"'machdep/irix-4.c'\" \(12975 characters\)
sed "s/^X//" >'machdep/irix-4.c' <<'END_OF_FILE'
X#ifndef lint
Xstatic char rcsid[] = "$Header: irix-4.c,v 1.6 1994/06/26 04:18:31 forys Exp $";
X#endif
X
X/*
X**  This program may be freely redistributed for noncommercial purposes.
X**  This entire comment MUST remain intact.
X**
X**  Copyright 1994 by Jeff Forys ([e-mail])
X*/
X
X#define    NO_MEXTERN
X#include "conf.h"
X#undef    NO_MEXTERN
X
X#include <sys/dir.h>
X#include <sys/user.h>
X#include <sys/proc.h>
X
X#include <stdio.h>
X
X/*
X * Define SigNames, NSig, and TtyDevDir here; they are used by other
X * routines and must be global.  Everyone seems to have their own
X * idea as to what NSIG should be.  Here, `NSig' is the number of
X * signals available, not counting zero.
X */
Xchar *SigMap[] = { "0",
X    "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",        /*  1 -  6 */
X    "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",        /*  7 - 12 */
X    "PIPE", "ALRM", "TERM", "USR1", "USR2", "CHLD",        /* 13 - 18 */
X    "PWR", "STOP", "TSTP", "POLL", "IO", "URG",        /* 19 - 24 */
X    "WINCH", "VTALRM", "PROF", "CONT", "TTIN", "TTOU",    /* 25 - 30 */
X    "XCPU", "XFSZ",                        /* 31 - 32 */
X};
Xint NSig = NUMSIGS;
X
X#define    SETCMD(dst,src,maxlen) {            \
X    extern char *rindex();                \
X    if (maxlen > 0) src[maxlen] = '\0';        \
X    dst = (dst = rindex(src, '/')) ? ++dst: src;    \
X}
X
Xstatic char *TtyDevDir = "/dev";
X
Xint    Skill;            /* set 1 if running `skill', 0 if `snice' */
Xint    PrioMin, PrioMax;    /* min and max process priorities */
Xint    SigPri;            /* signal to send or priority to set */
Xpid_T    MyPid;            /* pid of this process */
Xuid_T    MyUid;            /* uid of this process */
Xchar    *ProgName;        /* program name */
X
X/*
X * This is the machine-dependent initialization routine.
X *
X *   - The following global variables must be initialized:
X *     MyPid, MyUid, ProgName, Skill, PrioMin, PrioMax, SigPri
X *   - The working directory will be changed to that which contains the
X *     tty devices (`TtyDevDir'); this makes argument parsing go faster.
X *   - If possible, this routine should raise the priority of this process.
X */
Xvoid
XMdepInit(pname)
X    char *pname;
X{
X    extern char *rindex(), *SysErr();
X
X    MyPid = (pid_T) getpid();
X    MyUid = (uid_T) getuid();
X    SETCMD(ProgName, pname, 0)
X
X    /*
X     * If we are running as root, raise our priority to better
X     * catch runaway processes.
X     */
X    if (MyUid == ROOTUID)
X        (void) setpriority(PRIO_PROCESS, MyPid, PRIO_MIN);
X
X    /*
X     * Determine what we are doing to processes we find.  We will
X     * either send them a signal (skill), or renice them (snice).
X     */
X    Skill = (strcmp(ProgName, "snice") != 0);
X
X    /*
X     * chdir to `TtyDevDir' to speed up tty argument parsing.
X     */
X    if (chdir(TtyDevDir) < 0) {
X        fprintf(stderr, "%s: chdir(%s): %s\n", ProgName, TtyDevDir,
X                SysErr());
X        exit(EX_SERR);
X    }
X
X    /*
X     * Set up minimum and maximum process priorities.
X     * Initialize SigPri to either default signal (`skill') or
X     * default priority (`snice').
X     */
X    PrioMin = PRIO_MIN;
X    PrioMax = PRIO_MAX;
X    SigPri = Skill? SIGTERM: 4;
X}
X
X/*
X * Carry out an action on a particular process.  If this is `skill',
X * then send the process a signal, otherwise this is `snice' so change
X * it's priority.
X *
X * If 0 is returned, the operation was successful, otherwise -1 is
X * returned and `errno' set.
X */
Xint
XMdepAction(pid)
X    pid_T pid;
X{
X    if (Skill)
X        return(kill((int)pid, SigPri));
X    else
X        return(setpriority(PRIO_PROCESS, (int)pid, SigPri));
X}
X
X/*
X * Now, set up everything we need to write a GetProc() routine.
X */
X
X#include <sys/immu.h>
X#include <sys/swap.h>
X#include <sys/file.h>
X#include <sys/stat.h>
X#include <sys/sysmacros.h>
X
X#include <nlist.h>
X
Xstatic char *kmemf =    "/dev/kmem";    /* window into kernel virtual memory */
Xstatic char *memf =    "/dev/mem";    /* window into physical memory */
Xstatic char *kernf =    "/unix";    /* kernel image */
Xstatic char *devdskf =    "/dev/dsk";    /* where swap devices can be found */
Xstatic int kmem = 0, mem = 0;
X
Xstatic struct nlist nl[] = {
X    { "v" },
X#define    X_VAR        0
X    { "proc" },
X#define    X_PROC        1
X    { "swaptab" },
X#define    X_SWAPTAB    2
X    { "" },
X#define    X_LAST        3
X};
X
Xstatic    int    nproc = -1;
Xstatic    struct    proc *procp;
Xstatic    swpt_t    swtab[MSFILES];        /* available swap devices */
Xstatic    dev_t    swdev[MSFILES];        /* opened swap devices */
X
X#define    NPROCS    32            /* number of procs to read at once */
X
Xstatic    char    *pidmap[] = { "sched", "init", "vhand", "bdflush" };
Xstatic    int    pidmapsiz = sizeof(pidmap) / sizeof(pidmap[0]);
X
Xextern    off_t lseek();
X
X/*
X * GetProc()
X *
X * Fill in and return a `struct ProcInfo' with information about the
X * next process.  If no processes are left, return NULL.
X *
X * Fflag support:
X *      If Fflag is set we will try to avoid reading in the user struct
X *    and locating/opening the swap device(s).
X *      We can do this only if Iflag, TtyIndx, and CmdIndx are zero.
X */
Xstruct ProcInfo *
XGetProc()
X{
X    extern char *SysErr();
X    static struct user *GetUser();
X    static struct proc procs[NPROCS], *procsp;
X    static struct ProcInfo procinfo;
X    static struct var var;
X    register struct user *auser;
X    register struct proc *aproc;
X    static int thisproc = 0;
X    static int needuser = 1;        /* Fflag support */
X
X    /*
X     * If this is our first time here, open various files,
X     * and set up the nlist.
X     */
X    if (nproc == -1) {
X        char *errstr = "%s: %s: %s\n";
X        int nfound;
X
X        if ((kmem=open(kmemf, 0)) < 0) {    /* open kmem */
X            fprintf(stderr, errstr, ProgName, kmemf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((mem=open(memf, 0)) < 0) {        /* open mem */
X            fprintf(stderr, errstr, ProgName, memf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((nfound=nlist(kernf, nl)) < 0) {    /* kernel name list */
X            fprintf(stderr, errstr, ProgName, kernf,"no name list");
X            exit(EX_SERR);
X        }
X
X        if (nfound != 0) {
X            register int i;
X
X            fprintf(stderr, "%s: nlist: unresolved symbols:",
X                    ProgName);
X            for (i = 0; i < X_LAST; i++)
X                if (nl[i].n_type == 0)
X                    fprintf(stderr, " %s", nl[i].n_name);
X            (void) putc('\n', stderr);
X            exit(EX_SERR);
X        }
X
X        GetStruct((off_t)svirtophys(nl[X_VAR].n_value), "var",
X                  (off_t)&var, sizeof(var));
X        GetStruct((off_t)svirtophys(nl[X_SWAPTAB].n_value), "swaptab",
X                  (off_t)swtab, sizeof(swtab));
X        procp = (struct proc *)svirtophys(nl[X_PROC].n_value);
X        nproc = var.v_proc;
X
X        /*
X         * We run faster without finding/opening the swap devices
X         * and reading in the user struct; the price is incomplete
X         * information for errors (no cmd).
X         */
X        if (Fflag && Iflag == 0 && TtyIndx == 0 && CmdIndx == 0)
X            needuser = 0;
X        else
X            OpenSwapDevs();
X    }
X
X    /*
X     * Read in NPROCS proc structures at-a-time.  Decrement `nproc'
X     * by the number of proc structures we have read; when it reaches
X     * zero, we are finished (return NULL).
X     */
X    do {
X        while (thisproc == 0) {
X            int nread;
X            int psize;
X
X            if (nproc == 0)
X                return((struct ProcInfo *)NULL);
X
X            thisproc = MIN(NPROCS, nproc);
X            psize = thisproc * sizeof(struct proc);
X            nproc -= thisproc;
X            if (lseek(kmem, (off_t)procp, L_SET) == -1 ||
X                (nread = read(kmem, (char *)procs, psize)) < 0) {
X                fprintf(stderr, "%s: read proc: %s\n",
X                        ProgName, SysErr());
X                return((struct ProcInfo *)NULL);
X            } else if (nread != psize) {
X                thisproc = nread / sizeof(struct proc);
X                nproc = 0;
X                fprintf(stderr, "%s: read proc: short read\n",
X                        ProgName);
X            }
X            procsp = procs;
X            procp += thisproc;
X        }
X
X        aproc = procsp++;
X        thisproc--;
X
X        if (aproc->p_stat != 0) {
X            /*
X             * Before we go through the trouble of reading
X             * in the user struct, let's make sure this isn't
X             * a "zombie" or "exiting" process.  If it is,
X             * we have all the information we need; fill in
X             * procinfo and return.
X             */
X            procinfo.pi_flags = 0;
X            procinfo.pi_pid = (pid_T) aproc->p_pid;
X            procinfo.pi_uid = (uid_T) aproc->p_uid;
X
X            if (aproc->p_stat == SZOMB) {        /* zombie */
X                static char *zombie = "<defunct>";
X                procinfo.pi_flags |= PI_ZOMBIE;
X                procinfo.pi_cmd = zombie;
X            } else if (aproc->p_flag & SEXIT) {    /* exiting */
X                static char *exiting = "<exiting>";
X                procinfo.pi_flags |= PI_SWEXIT;
X                procinfo.pi_cmd = exiting;
X            } else if (!needuser) {            /* Fflag */
X                static char *fflagcmd = "<-f>";
X                procinfo.pi_cmd = fflagcmd;
X            }
X
X            if (procinfo.pi_flags || !needuser)
X                return(&procinfo);
X            else
X                auser = GetUser(aproc);
X        }
X
X    } while (aproc->p_stat == 0 || auser == NULL);
X
X    /*
X     * We now have a process (`aproc') and a user (`auser').
X     * Fill in the rest of `procinfo'.
X     */
X    if (auser->u_ttyd != (dev_t)-1) {    /* has a controlling tty */
X        procinfo.pi_flags |= PI_CTLTTY;
X        procinfo.pi_tty = (tty_T) auser->u_ttyd;
X    }
X
X    if (aproc->p_pid < pidmapsiz) {    /* special */
X        procinfo.pi_cmd = pidmap[aproc->p_pid];
X        procinfo.pi_flags |= PI_ASKUSR;
X    } else                 /* set path-stripped command name */
X        SETCMD(procinfo.pi_cmd, auser->u_comm, PSCOMSIZ)
X
X    return(&procinfo);
X}
X
X#define    SKRD(file, src, dst, size)            \
X    (lseek(file, (off_t)(src), L_SET) == -1) ||    \
X    (read(file, (char *)(dst), (size)) != (size))
X
XGetStruct(loc, name, dest, size)
X    off_t loc;
X    char *name;
X    off_t dest;
X    int size;
X{
X    if (SKRD(kmem, loc, dest, size)) {
X        fprintf(stderr, "%s: can't read %s struct at %lx in %s\n",
X                ProgName, name, (u_long)loc, kmemf);
X        exit(EX_SERR);
X    }
X}
X
X/*
X * OpenSwapDevs()
X *
X * Locate and open all the swap devices currently configured.
X * The opened file descriptors are saved in `swdev[i]'.
X *
X * Side Effect: this routine does a chdir(devdskf).
X */
XOpenSwapDevs()
X{
X    extern char *SysErr();
X    struct stat statb;
X    register DIR *devdsk;
X    register struct direct *dp;
X    register char *flnm;
X    register int i, keeplooking = 1;
X
X    /*
X     * Initialize all file descriptors to "unopened".
X     */
X    for (i = 0; i < MSFILES; i++)
X        swdev[i] = -1;
X
X    /*
X     * Relocate our current working directory to `devdskf' and open
X     * the directory for reading it's contents.
X     */
X    if (chdir(devdskf) < 0) {
X        fprintf(stderr, "%s: can't change dir to %s: %s\n",
X                ProgName, devdskf, SysErr());
X        return;
X    }
X    if ((devdsk = opendir(".")) == NULL) {
X        fprintf(stderr, "%s: can't open %s: %s\n",
X                    ProgName, devdskf, SysErr());
X        return;
X    }
X
X    /*
X     * For each directory entry, if it is one of our swap devices,
X     * try to open it.
X     */
X    while ((dp = readdir(devdsk)) != NULL && keeplooking) {
X        flnm = dp->d_name;
X        if (stat(flnm, &statb) < 0)    /* who knows, who cares... */
X            continue;
X        keeplooking = 0;
X        for (i = 0; i < MSFILES; i++) {
X            if (swdev[i] < 0 && S_ISBLK(statb.st_mode) &&
X                swtab[i].st_dev == statb.st_rdev)
X                if ((swdev[i] = open(flnm, 0)) < 0)
X                    fprintf(stderr,
X                            "%s: can't open %s/%s: %s\n",
X                            ProgName,devdskf,flnm,SysErr());
X
X            if (swtab[i].st_dev && swdev[i] < 0)
X                keeplooking = 1;
X        }
X    }
X
X    /*
X     * Lastly, see if there were any swap devices we could not locate.
X     */
X    if (keeplooking) {
X        for (i = 0; i < MSFILES; i++)
X            if (swtab[i].st_dev && swdev[i] < 0)
X                fprintf(stderr,
X                "%s: can't open swap device %d,%d\n", ProgName,
X                major(swtab[i].st_dev), minor(swtab[i].st_dev));
X    }
X    closedir(devdsk);
X}
X
X/*
X * GetUser(aproc)
X *
X * Read in the user struct for `aproc' and return a pointer to it.
X * If an error occurs, return NULL.
X */
Xstatic struct user *
XGetUser(aproc)
X    struct proc *aproc;
X{
X    static char *WarnMsg = "Warning: can't read ";
X    static union {
X        struct user user;
X        char upgs[USIZE][NBPP];
X    } u;
X    register int i, pgtype, file, swapi;
X    register u_int addr;
X    register char *flnm;
X
X    /*
X     * aproc->p_upgs has the pdes for the u-area.  Also, encoded into
X     * the pde is the key to the location of these pages.  If the disk
X     * block descriptor is of type DBD_NONE, then the pages are in
X     * core.  If they are of type DBD_SWAP they are out on swap device
X     * number `dbd_swpi' at logical block number `dbd_pgno'.  This is
X     * actually pretty cool, except that each swap partition must be
X     * treated separately (so we had to open all of them).
X     *
X     * If at any time, an lseek() or read() fails, print a warning
X     * message (if `Wflag' is set) and return NULL.
X     */
X    for (i = 0; i < USIZE; i++) {
X        pgtype = pdetodbd(&aproc->p_upgs[i])->dbd_type;
X        switch (pgtype) {
X            case DBD_NONE:    /* in core */
X            addr = aproc->p_upgs[i].pgm.pg_pfn*NBPP;
X            file = mem;
X            flnm = memf;
X            break;
X            case DBD_SWAP:    /* swapped out */
X            /*
X             * I assume that it's necessary to add in `st_swplo'
X             * in case our logical swap partition starts at a
X             * block offset other than zero.  The include files
X             * werent clear on this, so I guessed.  ..jef
X             */
X            swapi = aproc->p_upgs[i].pgm.dbd.dbd_swpi;
X            addr = BBTOB(aproc->p_upgs[i].pgm.dbd.dbd_pgno +
X                         swtab[swapi].st_swplo);
X            file = swdev[swapi];
X            flnm = "swap";
X            break;
X            default:        /* other (impossible?) things */
X            if (Wflag)
X                printf("%suser page of type %d for pid %d\n",
X                       WarnMsg, pgtype, aproc->p_pid);
X            return((struct user *)NULL);
X        }
X        if (SKRD(file, addr, u.upgs[i], NBPP)) {
X            if (Wflag)
X                printf("%suser page %u for pid %d from %s\n",
X                       WarnMsg, addr/NBPP, aproc->p_pid, flnm);
X            return((struct user *)NULL);
X        }
X    }
X    return (&u.user);
X}
END_OF_FILE
if test 12975 -ne `wc -c <'machdep/irix-4.c'`; then
    echo shar: \"'machdep/irix-4.c'\" unpacked with wrong size!
fi
# end of 'machdep/irix-4.c'
fi
if test -f 'machdep/ultrix-4.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'machdep/ultrix-4.c'\"
else
echo shar: Extracting \"'machdep/ultrix-4.c'\" \(13985 characters\)
sed "s/^X//" >'machdep/ultrix-4.c' <<'END_OF_FILE'
X#ifndef lint
Xstatic char rcsid[] = "$Header: ultrix-4.c,v 1.6 1994/06/26 04:16:59 forys Exp $";
X#endif
X
X/*
X**  This program may be freely redistributed for noncommercial purposes.
X**  This entire comment MUST remain intact.
X**
X**  Ultrix 4 support by Ric Anderson ([e-mail])
X**
X**  Copyright 1994 by Jeff Forys ([e-mail])
X*/
X
X#define    NO_MEXTERN
X#include "conf.h"
X#undef    NO_MEXTERN
X
X#include <sys/user.h>
X#include <sys/proc.h>
X
X#include <stdio.h>
X
X#define CRIT_PID    4  /* Query kills for pids .LE. this number */
X
X/*
X * Define SigNames, NSig, and TtyDevDir here; they are used by other
X * routines and must be global.  Everyone seems to have their own
X * idea as to what NSIG should be.  Here, `NSig' is the number of
X * signals available, not counting zero.
X */
Xchar *SigMap[] = { "0",
X    "HUP", "INT", "QUIT", "ILL", "TRAP", "IOT",        /*  1 -  6 */
X    "EMT", "FPE", "KILL", "BUS", "SEGV", "SYS",        /*  7 - 12 */
X    "PIPE", "ALRM", "TERM", "URG", "STOP", "TSTP",        /* 13 - 18 */
X    "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",        /* 19 - 24 */
X    "XFSZ", "VTALRM", "PROF", "WINCH", "LOST", "USR1",    /* 25 - 30 */
X    "USR2", "32",                        /* 31 - 32 */
X};
Xint NSig = NSIG;
X
X#define    SETCMD(dst,src,maxlen) {            \
X    extern char *rindex();                \
X    if (maxlen > 0) src[maxlen] = '\0';        \
X    dst = (dst = rindex(src, '/')) ? ++dst: src;    \
X}
X
Xstatic char *TtyDevDir = "/dev";
X
Xint    Skill;            /* set 1 if running `skill', 0 if `snice' */
Xint    PrioMin, PrioMax;    /* min and max process priorities */
Xint    SigPri;            /* signal to send or priority to set */
Xpid_T    MyPid;            /* pid of this process */
Xuid_T    MyUid;            /* uid of this process */
Xchar    *ProgName;        /* program name */
X
X/*
X * This is the machine-dependent initialization routine.
X *
X *   - The following global variables must be initialized:
X *     MyPid, MyUid, ProgName, Skill, PrioMin, PrioMax, SigPri
X *   - The working directory will be changed to that which contains the
X *     tty devices (`TtyDevDir'); this makes argument parsing go faster.
X *   - If possible, this routine should raise the priority of this process.
X */
Xvoid
XMdepInit(pname)
X    char *pname;
X{
X    extern char *rindex(), *SysErr();
X
X    MyPid = (pid_T) getpid();
X    MyUid = (uid_T) getuid();
X    SETCMD(ProgName, pname, 0)
X
X    /*
X     * If we are running as root, raise our priority to better
X     * catch runaway processes.
X     */
X    if (MyUid == ROOTUID)
X        (void) setpriority(PRIO_PROCESS, MyPid, PRIO_MIN);
X
X    /*
X     * Determine what we are doing to processes we find.  We will
X     * either send them a signal (skill), or renice them (snice).
X     */
X    Skill = (strcmp(ProgName, "snice") != 0);
X
X    /*
X     * chdir to `TtyDevDir' to speed up tty argument parsing.
X     */
X    if (chdir(TtyDevDir) < 0) {
X        fprintf(stderr, "%s: chdir(%s): %s\n", ProgName, TtyDevDir,
X                SysErr());
X        exit(EX_SERR);
X    }
X
X    /*
X     * Set up minimum and maximum process priorities.
X     * Initialize SigPri to either default signal (`skill') or
X     * default priority (`snice').
X     */
X    PrioMin = PRIO_MIN;
X    PrioMax = PRIO_MAX;
X    SigPri = Skill? SIGTERM: 4;
X}
X
X/*
X * Carry out an action on a particular process.  If this is `skill',
X * then send the process a signal, otherwise this is `snice' so change
X * it's priority.
X *
X * If 0 is returned, the operation was successful, otherwise -1 is
X * returned and `errno' set.
X */
Xint
XMdepAction(pid)
X    pid_T pid;
X{
X    if (Skill)
X        return(kill((int)pid, SigPri));
X    else
X        return(setpriority(PRIO_PROCESS, (int)pid, SigPri));
X}
X
X/*
X * Now, set up everything we need to write a GetProc() routine.
X */
X
X#include <sys/tty.h>
X#include <sys/file.h>
X#include <sys/vm.h>
X
X#include <machine/pte.h>
X
X#include <nlist.h>
X
Xstatic char *kmemf =    "/dev/kmem";    /* window into kernel virtual memory */
Xstatic char *memf =    "/dev/mem";    /* window into physical memory */
Xstatic char *swapf =    "/dev/drum";    /* paging device */
Xstatic char *kernf =    "/vmunix";    /* kernel image */
Xstatic int kmem = 0, mem = 0, swap = 0;
X
Xstatic struct nlist nl[] = {
X    { "_nproc" },
X#define    X_NPROC        0
X    { "_proc" },
X#define    X_PROC        1
X    { "_proc_bitmap" },
X#define    X_PROC_BITMAP    2
X#ifdef vax
X    { "_Usrptmap" },
X#define    X_USRPTMAP    3
X    { "_usrpt" },
X#define    X_USRPT        4
X    { "" },
X#define    X_LAST        5
X#else
X    { "" },
X#define    X_LAST        3
X#endif
X};
X
Xstatic    int    nproc = -1;
Xstatic    int    absolute_proc_number = -1;
Xstatic    struct    proc *procp;
X#ifdef vax
Xstatic    struct    pte *usrptmap, *usrpt;
X#endif
X
X#define    NPROCS    32            /* number of procs to read at once */
X
Xextern    off_t lseek();
X
X/*
X * GetProc()
X *
X * Fill in and return a `struct ProcInfo' with information about the
X * next process.  If no processes are left, return NULL.
X */
Xstruct ProcInfo *
XGetProc()
X{
X    int proc_active;
X    extern char *SysErr();
X    static struct user *GetUser();
X    static unsigned bitmap;
X    static struct proc procs[NPROCS], *procsp;
X    static struct ProcInfo procinfo;
X    static struct tty tty;
X    register struct user *auser;
X    register struct proc *aproc;
X    static int thisproc = 0;
X
X    /*
X     * If this is our first time here, open various files,
X     * and set up the nlist.
X     */
X    if (nproc == -1) {
X        char *errstr = "%s: %s: %s\n";
X        int nfound;
X
X        if ((kmem=open(kmemf, 0)) < 0) {    /* open kmem */
X            fprintf(stderr, errstr, ProgName, kmemf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((mem=open(memf, 0)) < 0) {        /* open mem */
X            fprintf(stderr, errstr, ProgName, memf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((swap=open(swapf, 0)) < 0) {    /* open swap device */
X            fprintf(stderr, errstr, ProgName, swapf, SysErr());
X            exit(EX_SERR);
X        }
X
X        if ((nfound=nlist(kernf, nl)) < 0) {    /* kernel name list */
X            fprintf(stderr, errstr, ProgName, kernf,"no name list");
X            exit(EX_SERR);
X        }
X        if (nfound != 0) {
X            register int i;
X
X            fprintf(stderr, "%s: nlist: unresolved symbols:",
X                    ProgName);
X            for (i = 0; i < X_LAST; i++)
X                if (nl[i].n_type == 0)
X                    fprintf(stderr, " %s", nl[i].n_name);
X            (void) putc('\n', stderr);
X            exit(EX_SERR);
X        }
X
X#ifdef vax
X        usrpt = (struct pte *) nl[X_USRPT].n_value;
X        usrptmap = (struct pte *) nl[X_USRPTMAP].n_value;
X#endif
X        procp = (struct proc *)GetWord((off_t)nl[X_PROC].n_value);
X        nproc = GetWord((off_t)nl[X_NPROC].n_value);
X    }
X
X    /*
X     * Read in NPROCS proc structures at-a-time.  Decrement `nproc'
X     * by the number of proc structures we have read; when it reaches
X     * zero, we are finished (return NULL).
X     */
X    do {
X        while (thisproc == 0) {
X            int nread;
X            int psize;
X
X            if (nproc == 0)
X                return((struct ProcInfo *)NULL);
X
X            thisproc = MIN(NPROCS, nproc);
X            psize = thisproc * sizeof(struct proc);
X            nproc -= thisproc;
X            if (lseek(kmem, (off_t)procp, L_SET) == -1 ||
X                (nread = read(kmem, (char *)procs, psize)) < 0) {
X                fprintf(stderr, "%s: read proc: %s\n",
X                        ProgName, SysErr());
X                return((struct ProcInfo *)NULL);
X            } else if (nread != psize) {
X                thisproc = nread / sizeof(struct proc);
X                nproc = 0;
X                fprintf(stderr, "%s: read proc: short read\n",
X                        ProgName);
X            }
X            procsp = procs;
X            procp += thisproc;
X        }
X
X        aproc = procsp++;
X        thisproc--;
X
X/*  Ultrix 4.x uses a bitmap to tell if a proc structure is    */
X/*  valid.  We read and check the bitmap.  The code here is    */
X/*  structured around 32 bits/entry, and 4 bytes/entry.        */
X
X        absolute_proc_number++;
X        if((absolute_proc_number % 32) == 0)
X            bitmap = GetWord((unsigned int)nl[X_PROC_BITMAP].n_value
X              + ((absolute_proc_number / 32) * 4));
X        proc_active = (bitmap & (1 << (absolute_proc_number % 32))) != 0;
X        if (proc_active) {
X            /*
X             * Before we go through the trouble of reading
X             * in the user struct, let's make sure this isn't
X             * a "zombie" or "exiting" process.  If it is,
X             * we have all the information we need; fill in
X             * procinfo and return.
X             */
X            procinfo.pi_flags = 0;
X            procinfo.pi_pid = (pid_T) aproc->p_pid;
X            procinfo.pi_uid = (uid_T) aproc->p_uid;
X
X            if (aproc->p_stat == SZOMB) {        /* zombie */
X                static char *zombie = "<defunct>";
X                procinfo.pi_flags |= PI_ZOMBIE;
X                procinfo.pi_cmd = zombie;
X            } else if (aproc->p_type & SWEXIT) {    /* exiting */
X                static char *exiting = "<exiting>";
X                procinfo.pi_flags |= PI_SWEXIT;
X                procinfo.pi_cmd = exiting;
X            }
X
X            if (procinfo.pi_flags)
X                return(&procinfo);
X            else
X                auser = GetUser(aproc);
X        }
X
X    } while (!proc_active || auser == NULL);
X
X    /*
X     * We now have a process (`aproc') and a user (`auser').
X     * Fill in the rest of `procinfo'.
X     */
X    if (aproc->p_ttyp != 0 &&    /* has a controlling terminal? */
X        lseek(kmem, (off_t)aproc->p_ttyp, L_SET) != -1 &&
X        read(kmem, (char *)&tty, sizeof(tty)) == sizeof(tty)) {
X        procinfo.pi_flags |= PI_CTLTTY;
X        procinfo.pi_tty = (tty_T) tty.t_dev;
X    }
X
X    if (aproc->p_pid <= CRIT_PID)    /* special */
X        procinfo.pi_flags |= PI_ASKUSR;
X    SETCMD(procinfo.pi_cmd, auser->u_comm, MAXCOMLEN)
X
X    return(&procinfo);
X}
X
X#define    SKRD(file, src, dst, size)            \
X    (lseek(file, (off_t)(src), L_SET) == -1) ||    \
X    (read(file, (char *)(dst), (size)) != (size))
X
X/*
X * GetStruct(loc,name,dest,size)
X *
X * Read in structure at `loc' from kernel virtual memory.
X * If an error occurs, return non-zero.
X */
X
Xstatic int
XGetStruct(loc,name,dest,size)
Xchar *name;
Xint size;
Xoff_t dest, loc;
X{
X    if(SKRD(kmem,loc,dest,size))
X        return(0);
X    return(1);
X}
X
X/*
X * GetWord(loc)
X *
X * Read in word at `loc' from kernel virtual memory.
X * If an error occurs, call exit(2) with EX_SERR.
X */
Xstatic int
XGetWord(loc)
X    off_t loc;
X{
X    int val;
X
X    if (SKRD(kmem, loc, &val, sizeof(val))) {
X        fprintf(stderr, "%s: can't read word at %lx in %s\n",
X                ProgName, (u_long)loc, kmemf);
X        exit(EX_SERR);
X    }
X    return (val);
X}
X
X#ifdef mips
X#define    SW_UADDR    dtob(GetWord(dmap.dm_ptdaddr))
X#define    SW_UBYTES    sizeof(struct user)
X
X/*
X * GetUser(aproc)
X *
X * Read in the user struct for `aproc' and return a pointer to it.
X * If an error occurs, return NULL.
X */
Xstatic struct user *
XGetUser(aproc)
X    struct proc *aproc;
X{
X    static char *WarnMsg = "Warning: can't read ";
X    static union {
X        struct user user;
X        char upgs[UPAGES][NBPG];
X    } u;
X    static struct pte uptes[UPAGES];
X    static struct dmap dmap;
X    register int i, nbytes;
X
X    /*
X     * If process is not in core, we simply snarf it's user struct
X     * from the swap device.
X     */
X    if ((aproc->p_sched & SLOAD) == 0) {
X        if(!GetStruct((off_t)aproc->p_smap,"aproc->p_smap",
X          &dmap,sizeof(dmap))) {
X            if (Wflag)
X                printf("%s dmap for pid %d from %s\n",
X                       WarnMsg, aproc->p_pid, swapf);
X            return ((struct user *)NULL);
X        }
X        if (SKRD(swap, SW_UADDR, &u.user, SW_UBYTES)) {
X            if (Wflag)
X                printf("%su for pid %d from %s\n",
X                       WarnMsg, aproc->p_pid, swapf);
X            return ((struct user *)NULL);
X        }
X        return (&u.user);
X    }
X
X    /*
X     * Process is in core.  Follow p_addr to read in the page
X     * table entries that map the u-area and then read in the
X     * physical pages that comprise the u-area.
X     *
X     * If at any time, an lseek() or read() fails, print a warning
X     * message (if `Wflag' is set) and return NULL.
X     */
X    if (SKRD(kmem, aproc->p_addr, uptes, sizeof(uptes))) {
X        if (Wflag)
X            printf("%suser pt for pid %d from %s\n",
X                   WarnMsg, aproc->p_pid, kmemf);
X        return ((struct user *)NULL);
X    }
X
X    nbytes = sizeof(struct user);
X    for (i = 0; i < UPAGES && nbytes > 0; i++) {
X        if (SKRD(mem, ptob(uptes[i].pg_pfnum), u.upgs[i], NBPG)) {
X            if (Wflag)
X                printf("%suser page %u for pid %d from %s\n",
X                       WarnMsg, uptes[i].pg_pfnum,
X                       aproc->p_pid, memf);
X            return((struct user *)NULL);
X        }
X        nbytes -= NBPG;
X    }
X    return (&u.user);
X}
X#endif /* mips */
X
X#ifdef vax
X/****    The following code is uncompiled, and untested.  if you have
X *    an Ultrix 4.x vax to compile it on, please do so and send
X *    mods to jeff forys.
X */
X
X#define    SW_UADDR    dtob(GetWord(dmap.dm_ptdaddr))
X#define    SW_UBYTES    sizeof(struct user)
X
X/*
X * GetUser(aproc)
X *
X * Read in the user struct for `aproc' and return a pointer to it.
X * If an error occurs, return NULL.
X */
Xstatic struct user *
XGetUser(aproc)
X    struct proc *aproc;
X{
X    static char *WarnMsg = "Warning: can't read ";
X    static union {
X        struct user user;
X        char upgs[UPAGES][NBPG];
X    } u;
X    static struct pte apte, uptes[CLSIZE+HIGHPAGES];
X    static struct dmap dmap;
X    register int ncl, i, nbytes;
X
X    /*
X     * If process is not in core, we simply snarf it's user struct
X     * from the swap device.
X     */
X    if ((aproc->p_sched & SLOAD) == 0) {
X        if(!GetStruct((off_t)aproc->p_smap,"aproc->p_smap",
X          &dmap,sizeof(dmap))) {
X            if (Wflag)
X                printf("%s dmap for pid %d from %s\n",
X                       WarnMsg, aproc->p_pid, swapf);
X            return ((struct user *)NULL);
X        }
X        if (SKRD(swap, SW_UADDR, &u.user, SW_UBYTES)) {
X            if (Wflag)
X                printf("%su for pid %d from %s\n",
X                       WarnMsg, aproc->p_pid, swapf);
X            return ((struct user *)NULL);
X        }
X        return (&u.user);
X    }
X
X/* Process is in core.  First read from the user page-table    */
X/* map for this process to get the u-area page table entry.    */
X/* Next, read in the page table entries that map the u-area.    */
X/* Finally, read in the physical pages that comprise the    */
X/* u-area.                            */
X/*                                */
X/* If at any time, an lseek() or read() fails, print a warning    */
X/* message (if `Wflag' is set) and return NULL.            */
X
X    if (SKRD(kmem, &usrptmap[btokmx(aproc->p_p0br) + aproc->p_szpt - 1],
X             &apte, sizeof(apte))) {
X        if (Wflag)
X            printf("%sindir pte of user pt for pid %d from %s\n",
X              WarnMsg, aproc->p_pid, kmemf);
X        return ((struct user *)NULL);
X    }
X
X    if (SKRD(mem, ctob(apte.pg_pfnum+1) - sizeof(uptes),
X             uptes, sizeof(uptes))) {
X        if (Wflag)
X            printf("%suser pt for pid %d from %s\n",
X                   WarnMsg, aproc->p_pid, memf);
X        return ((struct user *)NULL);
X    }
X
X    /*
X     * Set `ncl' to the (rounded up) number of u-area page clusters
X     * to read, and then read in this user struct (in reverse).
X     */
X    ncl = (sizeof(struct user) + CLBYTES - 1) / CLBYTES;
X    while (--ncl >= 0) {
X        i = ncl * CLSIZE;
X        if (SKRD(mem,ctob(uptes[CLSIZE+i].pg_pfnum),u.upgs[i],CLBYTES)){
X            if (Wflag)
X                printf("%suser page %u for pid %d from %s\n",
X                       WarnMsg, uptes[CLSIZE+i].pg_pfnum,
X                       aproc->p_pid, memf);
X            return((struct user *)NULL);
X        }
X    }
X    return (&u.user);
X}
X#endif /* vax */
END_OF_FILE
if test 13985 -ne `wc -c <'machdep/ultrix-4.c'`; then
    echo shar: \"'machdep/ultrix-4.c'\" unpacked with wrong size!
fi
# end of 'machdep/ultrix-4.c'
fi
echo shar: End of archive 3 \(of 3\).
cp /dev/null ark3isdone
MISSING=""
for I in 1 2 3 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 3 archives.
    rm -f ark[1-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0