home *** CD-ROM | disk | FTP | other *** search
- /*
- * top - a top users display for Unix
- *
- * SYNOPSIS: For Intel based System V Release 4
- *
- * DESCRIPTION:
- * System V release 4.0.x for i486
- * System V release 4 for Okidata M88100
- * and probably other svr4 ports
- *
- * LIBS: -lelf
- *
- * AUTHORS: Andrew Herbert <andrew@werple.apana.org.au>
- * Robert Boucher <boucher@sofkin.ca>
- */
-
- #include "top.h"
- #include "machine.h"
- #include "utils.h"
- #include <stdio.h>
- #include <fcntl.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <dirent.h>
- #include <nlist.h>
- #include <string.h>
- #include <sys/types.h>
- #include <sys/param.h>
- #include <sys/procfs.h>
- #include <sys/sysinfo.h>
- #include <sys/sysmacros.h>
- #include <sys/vmmeter.h>
- #include <vm/anon.h>
- #include <sys/priocntl.h>
- #include <sys/rtpriocntl.h>
- #include <sys/tspriocntl.h>
- #include <sys/procset.h>
- #include <sys/var.h>
-
- #define UNIX "/stand/unix"
- #define KMEM "/dev/kmem"
- #define PROCFS "/proc"
- #define CPUSTATES 5
-
- #ifndef PRIO_MAX
- #define PRIO_MAX 20
- #endif
- #ifndef PRIO_MIN
- #define PRIO_MIN -20
- #endif
-
- #ifndef FSCALE
- #define FSHIFT 8 /* bits to right of fixed binary point */
- #define FSCALE (1<<FSHIFT)
- #endif
-
- #define loaddouble(x) ((double)(x) / FSCALE)
- #define percent_cpu(x) ((double)(x)->pr_cpu / FSCALE)
- #define weighted_cpu(pct, pp) ( ((pp)->pr_time.tv_sec) == 0 ? 0.0 : \
- ((pp)->pr_cpu) / ((pp)->pr_time.tv_sec) )
- #define pagetok(size) ctob(size) >> LOG1024
-
- /* definitions for the index in the nlist array */
- #define X_AVENRUN 0
- #define X_MPID 1
- #define X_V 2
- #define X_NPROC 3
- #define X_ANONINFO 4
- #define X_TOTAL 5
- #define X_SYSINFO 6
-
- static struct nlist nlst[] =
- {
- {"avenrun"}, /* 0 */
- {"mpid"}, /* 1 */
- {"v"}, /* 2 */
- {"nproc"}, /* 3 */
- {"anoninfo"}, /* 4 */
- {"total"}, /* 5 */
- {"sysinfo"}, /* 6 */
- {NULL}
- };
-
- static unsigned long avenrun_offset;
- static unsigned long mpid_offset;
- static unsigned long nproc_offset;
- static unsigned long anoninfo_offset;
- static unsigned long total_offset;
- static unsigned long sysinfo_offset;
-
- /* get_process_info passes back a handle. This is what it looks like: */
-
- struct handle
- {
- struct prpsinfo **next_proc;/* points to next valid proc pointer */
- int remaining; /* number of pointers remaining */
- };
-
- /*
- * These definitions control the format of the per-process area
- */
-
- static char header[] =
- " PID X PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND";
- /* 0123456 -- field to fill in starts at header+6 */
- #define UNAME_START 6
- #define Proc_format \
- "%5d %-8.8s %3d %4d %5s %5s %-5s %6s %3d.0%% %5.2f%% %.16s"
-
- char *state_abbrev[] =
- {"", "sleep", "run", "zombie", "stop", "start", "cpu", "swap"};
-
- int process_states[8];
- char *procstatenames[] =
- {
- "", " sleeping, ", " running, ", " zombie, ", " stopped, ",
- " starting, ", " on cpu, ", " swapped, ",
- NULL
- };
-
- int cpu_states[CPUSTATES];
- char *cpustatenames[] =
- {"idle", "user", "kernel", "wait", "swap", NULL};
-
- /* these are for detailing the memory statistics */
-
- int memory_stats[5];
- char *memorynames[] =
- {"K real, ", "K active, ", "K free, ", "K swap, ", "K free swap", NULL};
-
- static int kmem = -1;
- static int nproc;
- static int bytes;
- static struct prpsinfo *pbase;
- static struct prpsinfo **pref;
- static DIR *procdir;
-
- /* useful externals */
- extern int errno;
- extern char *sys_errlist[];
- extern char *myname;
- extern int check_nlist ();
- extern int getkval ();
- extern void perror ();
- extern void getptable ();
- extern void quit ();
- extern int nlist ();
-
- int
- machine_init (struct statics *statics)
- {
- static struct var v;
-
- /* fill in the statics information */
- statics->procstate_names = procstatenames;
- statics->cpustate_names = cpustatenames;
- statics->memory_names = memorynames;
-
- /* get the list of symbols we want to access in the kernel */
- if (nlist (UNIX, nlst))
- {
- (void) fprintf (stderr, "Unable to nlist %s\n", UNIX);
- return (-1);
- }
-
- /* make sure they were all found */
- if (check_nlist (nlst) > 0)
- return (-1);
-
- /* open kernel memory */
- if ((kmem = open (KMEM, O_RDONLY)) == -1)
- {
- perror (KMEM);
- return (-1);
- }
-
- /* get the symbol values out of kmem */
- /* NPROC Tuning parameter for max number of processes */
- (void) getkval (nlst[X_V].n_value, &v, sizeof (struct var), nlst[X_V].n_name);
- nproc = v.v_proc;
-
- /* stash away certain offsets for later use */
- mpid_offset = nlst[X_MPID].n_value;
- nproc_offset = nlst[X_NPROC].n_value;
- avenrun_offset = nlst[X_AVENRUN].n_value;
- anoninfo_offset = nlst[X_ANONINFO].n_value;
- total_offset = nlst[X_TOTAL].n_value;
- sysinfo_offset = nlst[X_SYSINFO].n_value;
-
- /* allocate space for proc structure array and array of pointers */
- bytes = nproc * sizeof (struct prpsinfo);
- pbase = (struct prpsinfo *) malloc (bytes);
- pref = (struct prpsinfo **) malloc (nproc * sizeof (struct prpsinfo *));
-
- /* Just in case ... */
- if (pbase == (struct prpsinfo *) NULL || pref == (struct prpsinfo **) NULL)
- {
- (void) fprintf (stderr, "%s: can't allocate sufficient memory\n", myname);
- return (-1);
- }
-
- if (!(procdir = opendir (PROCFS)))
- {
- (void) fprintf (stderr, "Unable to open %s\n", PROCFS);
- return (-1);
- }
-
- if (chdir (PROCFS))
- { /* handy for later on when we're reading it */
- (void) fprintf (stderr, "Unable to chdir to %s\n", PROCFS);
- return (-1);
- }
-
- /* all done! */
- return (0);
- }
-
- char *
- format_header (char *uname_field)
- {
- register char *ptr;
-
- ptr = header + UNAME_START;
- while (*uname_field != '\0')
- *ptr++ = *uname_field++;
-
- return (header);
- }
-
- void
- get_system_info (struct system_info *si)
- {
- long avenrun[3];
- struct sysinfo sysinfo;
- struct vmtotal total;
- struct anoninfo anoninfo;
- static time_t cp_old[CPUSTATES];
- static time_t cp_diff[CPUSTATES]; /* for cpu state percentages */
- register int i;
-
- (void) getkval (sysinfo_offset, &sysinfo, sizeof (struct sysinfo), "sysinfo");
-
- /* convert cp_time counts to percentages */
- (void) percentages (CPUSTATES, cpu_states, sysinfo.cpu, cp_old, cp_diff);
-
- /* get mpid -- process id of last process */
- (void) getkval (mpid_offset, &(si->last_pid), sizeof (si->last_pid),
- "mpid");
-
- /* get load average array */
- (void) getkval (avenrun_offset, (int *) avenrun, sizeof (avenrun), "avenrun");
-
- /* convert load averages to doubles */
- for (i = 0; i < 3; i++)
- si->load_avg[i] = loaddouble (avenrun[i]);
-
- /* get total -- systemwide main memory usage structure */
- (void) getkval (total_offset, (int *) (&total), sizeof (total), "total");
- /* convert memory stats to Kbytes */
- memory_stats[0] = pagetok (total.t_rm);
- memory_stats[1] = pagetok (total.t_arm);
- memory_stats[2] = pagetok (total.t_free);
- (void) getkval (anoninfo_offset, (int *) (&anoninfo), sizeof (anoninfo),
- "anoninfo");
- memory_stats[3] = pagetok (anoninfo.ani_max - anoninfo.ani_free);
- memory_stats[4] = pagetok (anoninfo.ani_max - anoninfo.ani_resv);
-
- /* set arrays and strings */
- si->cpustates = cpu_states;
- si->memory = memory_stats;
- }
-
- static struct handle handle;
-
- caddr_t
- get_process_info (
- struct system_info *si,
- struct process_select *sel,
- int (*compare) ())
- {
- register int i;
- register int total_procs;
- register int active_procs;
- register struct prpsinfo **prefp;
- register struct prpsinfo *pp;
-
- /* these are copied out of sel for speed */
- int show_idle;
- int show_system;
- int show_uid;
-
- /* Get current number of processes */
- (void) getkval (nproc_offset, (int *) (&nproc), sizeof (nproc), "nproc");
-
- /* read all the proc structures */
- getptable (pbase);
-
- /* get a pointer to the states summary array */
- si->procstates = process_states;
-
- /* set up flags which define what we are going to select */
- show_idle = sel->idle;
- show_system = sel->system;
- show_uid = sel->uid != -1;
-
- /* count up process states and get pointers to interesting procs */
- total_procs = 0;
- active_procs = 0;
- (void) memset (process_states, 0, sizeof (process_states));
- prefp = pref;
-
- for (pp = pbase, i = 0; i < nproc; pp++, i++)
- {
- /*
- * Place pointers to each valid proc structure in pref[].
- * Process slots that are actually in use have a non-zero
- * status field. Processes with SSYS set are system
- * processes---these get ignored unless show_sysprocs is set.
- */
- if (pp->pr_state != 0 &&
- (show_system || ((pp->pr_flag & SSYS) == 0)))
- {
- total_procs++;
- process_states[pp->pr_state]++;
- if ((!pp->pr_zomb) &&
- (show_idle || (pp->pr_state == SRUN) || (pp->pr_state == SONPROC)) &&
- (!show_uid || pp->pr_uid == (uid_t) sel->uid))
- {
- *prefp++ = pp;
- active_procs++;
- }
- }
- }
-
- /* if requested, sort the "interesting" processes */
- if (compare != NULL)
- qsort ((char *) pref, active_procs, sizeof (struct prpsinfo *), compare);
-
- /* remember active and total counts */
- si->p_total = total_procs;
- si->p_active = active_procs;
-
- /* pass back a handle */
- handle.next_proc = pref;
- handle.remaining = active_procs;
- return ((caddr_t) & handle);
- }
-
- char fmt[MAX_COLS]; /* static area where result is built */
-
- char *
- format_next_process (
- caddr_t handle,
- char *(*get_userid) ())
- {
- register struct prpsinfo *pp;
- struct handle *hp;
- register long cputime;
- register double pctcpu;
-
- /* find and remember the next proc structure */
- hp = (struct handle *) handle;
- pp = *(hp->next_proc++);
- hp->remaining--;
-
- /* get the cpu usage and calculate the cpu percentages */
- cputime = pp->pr_time.tv_sec;
- pctcpu = percent_cpu (pp);
-
- /* format this entry */
- (void) sprintf (fmt,
- Proc_format,
- pp->pr_pid,
- (*get_userid) (pp->pr_uid),
- pp->pr_pri - PZERO,
- pp->pr_nice - NZERO,
- format_k(pagetok (pp->pr_size)),
- format_k(pagetok (pp->pr_rssize)),
- state_abbrev[pp->pr_state],
- format_time(cputime),
- (pp->pr_cpu & 0377),
- 100.0 * pctcpu,
- pp->pr_fname);
-
- /* return the result */
- return (fmt);
- }
-
- /*
- * check_nlist(nlst) - checks the nlist to see if any symbols were not
- * found. For every symbol that was not found, a one-line
- * message is printed to stderr. The routine returns the
- * number of symbols NOT found.
- */
- int
- check_nlist (register struct nlist *nlst)
- {
- register int i;
-
- /* check to see if we got ALL the symbols we requested */
- /* this will write one line to stderr for every symbol not found */
-
- i = 0;
- while (nlst->n_name != NULL)
- {
- if (nlst->n_type == 0)
- {
- /* this one wasn't found */
- (void) fprintf (stderr, "kernel: no symbol named `%s'\n", nlst->n_name);
- i = 1;
- }
- nlst++;
- }
- return (i);
- }
-
-
- /*
- * getkval(offset, ptr, size, refstr) - get a value out of the kernel.
- * "offset" is the byte offset into the kernel for the desired value,
- * "ptr" points to a buffer into which the value is retrieved,
- * "size" is the size of the buffer (and the object to retrieve),
- * "refstr" is a reference string used when printing error meessages,
- * if "refstr" starts with a '!', then a failure on read will not
- * be fatal (this may seem like a silly way to do things, but I
- * really didn't want the overhead of another argument).
- *
- */
- int
- getkval (
- unsigned long offset,
- int *ptr,
- int size,
- char *refstr)
- {
- #ifdef MIPS
- if (lseek (kmem, (long) (offset & 0x7fffffff), 0) == -1)
- #else
- if (lseek (kmem, (long) offset, 0) == -1)
- #endif
- {
- if (*refstr == '!')
- refstr++;
- (void) fprintf (stderr, "%s: lseek to %s: %s\n",
- myname, refstr, sys_errlist[errno]);
- quit (22);
- }
- if (read (kmem, (char *) ptr, size) == -1)
- if (*refstr == '!')
- /* we lost the race with the kernel, process isn't in memory */
- return (0);
- else
- {
- (void) fprintf (stderr, "%s: reading %s: %s\n",
- myname, refstr, sys_errlist[errno]);
- quit (23);
- }
- return (1);
- }
-
- /* comparison routine for qsort */
-
- /*
- * proc_compare - comparison function for "qsort"
- * Compares the resource consumption of two processes using five
- * distinct keys. The keys (in descending order of importance) are:
- * percent cpu, cpu ticks, state, resident set size, total virtual
- * memory usage. The process states are ordered as follows (from least
- * to most important): WAIT, zombie, sleep, stop, start, run. The
- * array declaration below maps a process state index into a number
- * that reflects this ordering.
- */
-
-
- unsigned char sorted_state[] =
- {
- 0, /* not used */
- 3, /* sleep */
- 6, /* run */
- 2, /* zombie */
- 4, /* stop */
- 5, /* start */
- 7, /* run on a processor */
- 1 /* being swapped (WAIT) */
- };
-
- int
- proc_compare (
- struct prpsinfo **pp1,
- struct prpsinfo **pp2)
- {
- register struct prpsinfo *p1;
- register struct prpsinfo *p2;
- register long result;
-
- /* remove one level of indirection */
- p1 = *pp1;
- p2 = *pp2;
-
- /* compare percent cpu (pctcpu) */
- if ((result = (long) (p2->pr_cpu - p1->pr_cpu)) == 0)
- {
- /* use cpticks to break the tie */
- if ((result = p2->pr_time.tv_sec - p1->pr_time.tv_sec) == 0)
- {
- /* use process state to break the tie */
- if ((result = (long) (sorted_state[p2->pr_state] -
- sorted_state[p1->pr_state])) == 0)
- {
- /* use priority to break the tie */
- if ((result = p2->pr_oldpri - p1->pr_oldpri) == 0)
- {
- /* use resident set size (rssize) to break the tie */
- if ((result = p2->pr_rssize - p1->pr_rssize) == 0)
- {
- /* use total memory to break the tie */
- result = (p2->pr_size - p1->pr_size);
- }
- }
- }
- }
- }
- return (result);
- }
-
- /*
- get process table
- */
- void
- getptable (struct prpsinfo *baseptr)
- {
- struct prpsinfo *currproc; /* pointer to current proc structure */
- int numprocs = 0;
- struct dirent *direntp;
-
- for (rewinddir (procdir); direntp = readdir (procdir);)
- {
- int fd;
-
- if ((fd = open (direntp->d_name, O_RDONLY)) < 0)
- continue;
-
- currproc = &baseptr[numprocs];
- if (ioctl (fd, PIOCPSINFO, currproc) < 0)
- {
- (void) close (fd);
- continue;
- }
-
- numprocs++;
- (void) close (fd);
- }
-
- if (nproc != numprocs)
- nproc = numprocs;
- }
-
- /* return the owner of the specified process, for use in commands.c as we're
- running setuid root */
- uid_t
- proc_owner (pid_t pid)
- {
- register struct prpsinfo *p;
- int i;
- for (i = 0, p = pbase; i < nproc; i++, p++)
- if (p->pr_pid == pid)
- return (p->pr_uid);
-
- return (-1);
- }
-
- int
- setpriority (int dummy, int who, int niceval)
- {
- int scale;
- int prio;
- pcinfo_t pcinfo;
- pcparms_t pcparms;
- tsparms_t *tsparms;
-
- strcpy (pcinfo.pc_clname, "TS");
- if (priocntl (0, 0, PC_GETCID, (caddr_t) & pcinfo) == -1)
- return (-1);
-
- prio = niceval;
- if (prio > PRIO_MAX)
- prio = PRIO_MAX;
- else if (prio < PRIO_MIN)
- prio = PRIO_MIN;
-
- tsparms = (tsparms_t *) pcparms.pc_clparms;
- scale = ((tsinfo_t *) pcinfo.pc_clinfo)->ts_maxupri;
- tsparms->ts_uprilim = tsparms->ts_upri = -(scale * prio) / 20;
- pcparms.pc_cid = pcinfo.pc_cid;
-
- if (priocntl (P_PID, who, PC_SETPARMS, (caddr_t) & pcparms) == -1)
- return (-1);
-
- return (0);
- }
-