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HAM Radio 3.2
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Ham Radio Version 3.2 (Chestnut CD-ROMs)(1993).ISO
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n17jsrc
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main.c
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C/C++ Source or Header
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1991-08-21
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27KB
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1,183 lines
/* Main-level network program:
* initialization
* keyboard processing
* generic user commands
*
* Copyright 1991 Phil Karn, KA9Q
*/
#include <stdio.h>
#include <time.h>
#if defined(__TURBOC__) && defined(MSDOS)
#include <fcntl.h>
#include <dos.h>
#include <io.h>
#include <conio.h>
#include <ctype.h>
#include <dir.h>
#endif
#include "global.h"
#include "config.h"
#ifdef ANSIPROTO
#include <stdarg.h>
#endif
#include "mbuf.h"
#include "timer.h"
#include "proc.h"
#include "iface.h"
#include "ip.h"
#include "tcp.h"
#include "udp.h"
#include "ax25.h"
#include "kiss.h"
#include "enet.h"
#include "netrom.h"
#include "ftpcli.h"
#include "telnet.h"
#include "tty.h"
#include "session.h"
#include "hardware.h"
#include "usock.h"
#include "socket.h"
#include "cmdparse.h"
#include "commands.h"
#include "daemon.h"
#include "devparam.h"
#include "domain.h"
#include "files.h"
#include "main.h"
#include "remote.h"
#include "trace.h"
extern struct cmds Cmds[],Startcmds[],Stopcmds[],Attab[];
#if (!defined(MSDOS) || defined(ESCAPE)) /* PC uses F-10 key always */
static char Escape = 0x1d; /* default escape character is ^] */
#endif
#ifdef __TURBOC__
int dofstat __ARGS((void));
#endif
char Badhost[] = "Unknown host %s\n";
char *Hostname = NULLCHAR;
char Nospace[] = "No space!!\n"; /* Generic malloc fail message */
char *Motd = NULLCHAR; /* Message Of The Day */
int Attended = TRUE; /* default to attended mode */
int ThirdParty = TRUE; /* Allows 3rd party mail by default */
int main_exit = FALSE; /* from main program (flag) */
int Mprunning = 0; /* flag for other parts (domain) to signal
* that we are fully configured running.
*/
struct proc *Cmdpp;
struct proc *Display;
static char *DumpAddr = NULL; /* Memory dump pointer */
static char Prompt[] = "net> ";
static FILE *Logfp;
static time_t StartTime; /* Time that NOS was started */
static int Verbose;
static void ctohex __ARGS((char *buf,int16 c));
static void fmtline __ARGS((int16 addr,char *buf,int16 len));
int
main(argc,argv)
int argc;
char *argv[];
{
char *inbuf,*intmp;
FILE *fp;
struct daemon *tp;
struct mbuf *bp;
int c;
int i;
StartTime = time(&StartTime); /* NOS Start_Up time */
while((c = getopt(argc,argv,"s:d:bv")) != EOF){
switch(c){
case 's': /* Number of sockets */
Nusock = atoi(optarg);
break;
case 'd': /* Root directory for various files */
initroot(optarg);
break;
#ifdef __TURBOC__
case 'b': /* Use BIOS for screen output */
directvideo = 0;
break;
#endif
case 'v':
Verbose = 1;
break;
}
}
kinit();
ipinit();
ioinit();
sockinit();
Cmdpp = mainproc("cmdintrp");
Sessions = (struct session *)callocw(Nsessions,sizeof(struct session));
Command = Lastcurr = newsession("command interpreter",COMMAND,0);
Command->flowmode = 1; /* set 'more' paging on command screen */
Display = newproc("display",250,display,0,NULLCHAR,NULL,0);
tprintf("KA9Q NOS version %s\n%s\n",Version, Version2);
tprintf("Copyright 1990 by Phil Karn (KA9Q) and others.\n");
rflush();
/* Start background Daemons */
for(tp=Daemons;;tp++){
if(tp->name == NULLCHAR)
break;
newproc(tp->name,tp->stksize,tp->fp,0,NULLCHAR,NULL,0);
}
if(optind < argc){
/* Read startup file named on command line */
if((fp = fopen(argv[optind],READ_TEXT)) == NULLFILE)
tprintf("Can't read config file %s: %s\n",
argv[optind],sys_errlist[errno]);
} else {
/* Read default startup file named in files.c (autoexec.nos) */
if((fp = fopen(Startup,READ_TEXT)) == NULLFILE)
tprintf("Can't read default config file %s: %s\n",
Startup,sys_errlist[errno]);
}
if(fp != NULLFILE){
inbuf = mallocw(BUFSIZ);
intmp = mallocw(BUFSIZ);
while(fgets(inbuf,BUFSIZ,fp) != NULLCHAR){
strcpy(intmp,inbuf);
if(Verbose){
tprintf("%s",intmp);
rflush();
}
if(cmdparse(Cmds,inbuf,NULL) != 0){
tprintf("input line: %s",intmp);
}
}
fclose(fp);
free(inbuf);
free(intmp);
}
Mprunning = 1; /* we are on speed now */
/* Now loop forever, processing commands */
for(;;){
tprintf(Prompt);
usflush(Command->output);
if(recv_mbuf(Command->input,&bp,0,NULLCHAR,0) != -1){
(void)cmdparse(Cmds,bp->data,Lastcurr);
free_p(bp);
}
}
}
/* Keyboard input process */
void
keyboard(i,v1,v2)
int i;
void *v1;
void *v2;
{
int c;
struct mbuf *bp;
/* Keyboard process loop */
for(;;){
c = kbread();
#if (!defined(MSDOS) || defined(ESCAPE))
if(c == Escape && Escape != 0)
c = -2;
#endif
if(c == -2 && Current != Command){
/* Save current tty mode and set cooked */
swapscreen(Current,Command);
Lastcurr = Current;
Current = Command;
/* set 'more' paging on command screen */
Command->flowmode = 1;
}
Current->row = MOREROWS;
psignal(&Current->row,1);
if(c >= 0){
/* If the screen driver was in morewait state, this char
* has woken him up. Toss it so it doesn't also get taken
* as normal input. If the char was a command escape,
* however, it will be accepted; this gives the user
* a way out of lengthy output.
*/
if(!Current->morewait
&& (bp = ttydriv(Current,(char)c)) != NULLBUF){
send_mbuf(Current->input,bp,0,NULLCHAR,0);
}
}
}
}
/* Standard commands called from main */
int
dodelete(argc,argv,p)
int argc;
char *argv[];
void *p;
{
int i;
for(i=1;i < argc; i++){
if(unlink(argv[i]) == -1){
tprintf("Can't delete %s: %s\n",
argv[i],sys_errlist[errno]);
}
}
return 0;
}
int
dorename(argc,argv,p)
int argc;
char *argv[];
void *p;
{
if(rename(argv[1],argv[2]) == -1)
tprintf("Can't rename: %s\n",sys_errlist[errno]);
return 0;
}
int
doexit(argc,argv,p)
int argc;
char *argv[];
void *p;
{
int i;
time_t StopTime;
StopTime = time(&StopTime);
main_exit = TRUE; /* let everyone know we're out of here */
reset_all();
if(Dfile_updater != NULLPROC)
alert(Dfile_updater,0); /* don't wait for timeout */
for(i=0;i<100;i++)
pwait(NULL); /* Allow tasks to complete */
shuttrace();
log(-1,"NOS was stopped at %s", ctime(&StopTime));
if(Logfp){
fclose(Logfp);
Logfp = NULLFILE;
}
iostop();
exit(0);
return 0; /* To satisfy lint */
}
int
dohostname(argc,argv,p)
int argc;
char *argv[];
void *p;
{
if(argc < 2)
tprintf("%s\n",Hostname);
else {
struct iface *ifp;
char *name;
if((ifp = if_lookup(argv[1])) != NULLIF){
if((name = resolve_a(ifp->addr, FALSE)) == NULLCHAR){
tprintf("Interface address not resolved\n");
return 1;
} else {
if(Hostname != NULLCHAR)
free(Hostname);
Hostname = name;
tprintf("Hostname set to %s\n", name );
}
} else {
if(Hostname != NULLCHAR)
free(Hostname);
Hostname = strdup(argv[1]);
/* Remove trailing dot */
if(Hostname[strlen(Hostname)] == '.')
Hostname[strlen(Hostname)] = '.';
}
}
return 0;
}
int
dolog(argc,argv,p)
int argc;
char *argv[];
void *p;
{
static char *logname;
if(argc < 2){
if(Logfp)
tprintf("Logging to %s\n",logname);
else
tprintf("Logging off\n");
return 0;
}
if(Logfp){
log(-1,"NOS log closed");
fclose(Logfp);
Logfp = NULLFILE;
free(logname);
logname = NULLCHAR;
}
if(strcmp(argv[1],"stop") != 0){
logname = strdup(argv[1]);
Logfp = fopen(logname,APPEND_TEXT);
log(-1,"NOS v%s was started at %s", Version, ctime(&StartTime));
#ifdef MSDOS
log(-1,"NOS load information: CS=0x%04x DS=0x%04x", _CS, _DS);
#endif
}
return 0;
}
int
dohelp(argc,argv,p)
int argc;
char *argv[];
void *p;
{
register struct cmds *cmdp;
int i;
char buf[66];
tprintf("Main commands:\n");
memset(buf,' ',sizeof(buf));
buf[64] = '\n';
buf[65] = '\0';
for(i=0,cmdp = Cmds;cmdp->name != NULL;cmdp++,i = (i+1)%4){
strncpy(&buf[i*16],cmdp->name,strlen(cmdp->name));
if(i == 3){
tprintf(buf);
memset(buf,' ',sizeof(buf));
buf[64] = '\n';
buf[65] = '\0';
}
}
if(i != 0)
tprintf(buf);
return 0;
}
/* Attach an interface
* Syntax: attach <hw type> <I/O address> <vector> <mode> <label> <bufsize> [<speed>]
*/
int
doattach(argc,argv,p)
int argc;
char *argv[];
void *p;
{
return subcmd(Attab,argc,argv,p);
}
/* Manipulate I/O device parameters */
int
doparam(argc,argv,p)
int argc;
char *argv[];
void *p;
{
int param,set;
int32 val;
register struct iface *ifp;
if((ifp = if_lookup(argv[1])) == NULLIF){
tprintf("Interface \"%s\" unknown\n",argv[1]);
return 1;
}
if(ifp->ioctl == NULL){
tprintf("Not supported\n");
return 1;
}
if(argc < 3){
for(param=1;param<=16;param++){
val = (*ifp->ioctl)(ifp,param,FALSE,0L);
if(val != -1)
tprintf("%s: %ld\n",parmname(param),val);
}
return 0;
}
param = devparam(argv[2]);
if(param == -1){
tprintf("Unknown parameter %s\n",argv[2]);
return 1;
}
if(argc < 4){
set = FALSE;
val = 0L;
} else {
set = TRUE;
val = atol(argv[3]);
}
val = (*ifp->ioctl)(ifp,param,set,val);
if(val == -1){
tprintf("Parameter %s not supported\n",argv[2]);
} else {
tprintf("%s: %ld\n",parmname(param),val);
}
return 0;
}
/* Display or set IP interface control flags */
int
domode(argc,argv,p)
int argc;
char *argv[];
void *p;
{
register struct iface *ifp;
if((ifp = if_lookup(argv[1])) == NULLIF){
tprintf("Interface \"%s\" unknown\n",argv[1]);
return 1;
}
if(argc < 3){
tprintf("%s: %s\n",ifp->name,
(ifp->flags & CONNECT_MODE) ? "VC mode" : "Datagram mode");
return 0;
}
switch(argv[2][0]){
case 'v':
case 'c':
case 'V':
case 'C':
ifp->flags = CONNECT_MODE;
break;
case 'd':
case 'D':
ifp->flags = DATAGRAM_MODE;
break;
default:
tprintf("Usage: %s [vc | datagram]\n",argv[0]);
return 1;
}
return 0;
}
#if (!defined(MSDOS) || defined(ESCAPE))
int
doescape(argc,argv,p)
int argc;
char *argv[];
void *p;
{
if(argc < 2)
tprintf("0x%x\n",Escape);
else
Escape = *argv[1];
return 0;
}
#endif MSDOS
/* Generate system command packet. Synopsis:
* remote [-p port#] [-k key] [-a hostname] <hostname> reset|exit|kickme
*/
int
doremote(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct sockaddr_in fsock;
int s,c;
char *data,x;
int16 port,len;
char *key = NULLCHAR;
int klen;
int32 addr = 0;
char *cmd,*host;
port = IPPORT_REMOTE; /* Set default */
optind = 1; /* reinit getopt() */
while((c = getopt(argc,argv,"a:p:k:s:")) != EOF){
switch(c){
case 'a':
if((addr = resolve(optarg)) == 0){
tprintf("Host %s unknown\n",optarg);
return -1;
}
break;
case 'p':
port = atoi(optarg);
break;
case 'k':
key = optarg;
klen = strlen(key);
break;
case 's':
Rempass = strdup(optarg);
return 0; /* Only set local password */
}
}
if(optind > argc - 2){
tprintf("Insufficient args\n");
return -1;
}
host = argv[optind++];
cmd = argv[optind];
if((s = socket(AF_INET,SOCK_DGRAM,0)) == -1){
tprintf("socket failed\n");
return 1;
}
len = 1;
/* Did the user include a password or kickme target? */
if(addr != 0 && cmd[0] == 'k')
len += sizeof(int32);
if(key != NULLCHAR && (cmd[0] == 'r' || cmd[0] == 'e'))
len += klen;
if(len == 1)
data = &x;
else
data = mallocw(len);
fsock.sin_family = AF_INET;
if((fsock.sin_addr.s_addr = resolve(host)) == 0){
tprintf("Host %s unknown\n",host);
goto cleanup;
}
fsock.sin_port = port;
switch(cmd[0]){
case 'r':
data[0] = SYS_RESET;
if(key != NULLCHAR)
strncpy(&data[1],key,klen);
break;
case 'e':
data[0] = SYS_EXIT;
if(key != NULLCHAR)
strncpy(&data[1],key,klen);
break;
case 'k':
data[0] = KICK_ME;
if(addr != 0)
put32(&data[1],addr);
break;
default:
tprintf("Unknown command %s\n",cmd);
goto cleanup;
}
/* Form the command packet and send it */
if(sendto(s,data,len,0,(char *)&fsock,sizeof(fsock)) == -1){
tprintf("sendto failed: %s\n",sys_errlist[errno]);
goto cleanup;
}
cleanup:
if(data != &x)
free(data);
close_s(s);
return 0;
}
int
domore(argc,argv,p)
int argc;
char *argv[];
void *p;
{
struct session *sp;
FILE *fp;
char buf[81];
int row;
if((sp = newsession(argv[1],MORE,0)) == NULLSESSION){
return -1;
}
/* Put tty into raw mode so single-char responses will work */
sp->ttystate.echo = sp->ttystate.edit = 0;
if((fp = fopen(argv[1],READ_TEXT)) == NULLFILE){
tprintf("Can't read %s\n",argv[1]);
keywait(NULLCHAR,1);
freesession(sp);
return 1;
}
row = MOREROWS;
while(fgets(buf,sizeof(buf),fp),!feof(fp)){
tprintf("%s",buf);
if(--row == 0){
row = keywait("--More--",0);
switch(row){
case -1:
case 'q':
case 'Q':
goto done;
case '\n':
case '\r':
row = 1;
break;
case ' ':
default:
row = MOREROWS;
}
}
}
done: fclose(fp);
keywait(NULLCHAR,1);
freesession(sp);
return 0;
}
int
dotail(argc,argv,p)
int argc;
char *argv[];
void *p;
{
register int handle, i;
register unsigned line = 0, rdsize = 2000;
long length;
char *buffer;
buffer = callocw(2000, sizeof (char));
if ((handle = open (argv[1], O_BINARY | O_RDONLY)) == -1) {
tprintf("Can't open input file %s: %s\n",
argv[1],sys_errlist[errno]);
free(buffer);
return -1;
}
length = filelength(handle);
if (length > 2000) {
length -= 2000;
} else {
rdsize = (int) length;
length = 0;
}
lseek (handle, length, SEEK_SET);
if (read (handle, buffer, rdsize) == -1) {
tprintf("Can't read input file %s: %s\n",
argv[1],sys_errlist[errno]);
close(handle);
free(buffer);
return -1;
}
for (i = rdsize - 1; i > 0; i--) {
if (buffer[i] == '\n')
line++;
if (line == 18)
break;
}
for (; i < rdsize; i++)
tputc(buffer[i]);
tprintf("\n");
close(handle);
free(buffer);
return 0;
}
/* No-op command */
int
donothing(argc,argv,p)
int argc;
char *argv[];
void *p;
{
return 0;
}
/* Log messages of the form
* Tue Jan 31 00:00:00 1987 44.64.0.7:1003 open FTP
*/
#if defined(ANSIPROTO)
void
log(int s,char *fmt, ...)
{
va_list ap;
char *cp;
long t;
int i;
struct sockaddr fsocket;
#ifdef MSDOS
int fd;
#endif
if(Logfp == NULLFILE)
return;
time(&t);
cp = ctime(&t);
rip(cp);
i = SOCKSIZE;
fprintf(Logfp,"%s",cp);
if(getpeername(s,(char *)&fsocket,&i) != -1)
fprintf(Logfp," %s",psocket(&fsocket));
fprintf(Logfp," - ");
va_start(ap,fmt);
vfprintf(Logfp,fmt,ap);
va_end(ap);
fprintf(Logfp,"\n");
fflush(Logfp);
#ifdef MSDOS
/* MS-DOS doesn't really flush files until they're closed */
fd = fileno(Logfp);
if((fd = dup(fd)) != -1)
close(fd);
#endif
}
#else
/*VARARGS2*/
void
log(s,fmt,arg1,arg2,arg3,arg4,arg5)
int s;
char *fmt;
int arg1,arg2,arg3,arg4,arg5;
{
char *cp;
long t;
int fd,i;
struct sockaddr fsocket;
if(Logfp == NULLFILE)
return;
time(&t);
cp = ctime(&t);
rip(cp);
i = SOCKSIZE;
fprintf(Logfp,"%s",cp);
if(getpeername(s,(char *)&fsocket,&i) != -1)
fprintf(Logfp," %s",psocket(&fsocket));
fprintf(Logfp," - ");
fprintf(Logfp,fmt,arg1,arg2,arg3,arg4,arg5);
fprintf(Logfp,"\n");
fflush(Logfp);
#ifdef MSDOS
/* MS-DOS doesn't really flush files until they're closed */
fd = fileno(Logfp);
if((fd = dup(fd)) != -1)
close(fd);
#endif
}
#endif
int
dosource(argc,argv,p)
int argc;
char *argv[];
void *p;
{
int linenum = 0;
char *inbuf,*intmp;
FILE *fp;
/* Read command source file */
if((fp = fopen(argv[1],READ_TEXT)) == NULLFILE){
tprintf("Can't read source file %s: %s\n",
argv[1],sys_errlist[errno]);
return 1;
}
inbuf = malloc(BUFSIZ);
intmp = malloc(BUFSIZ);
while(fgets(inbuf,BUFSIZ,fp) != NULLCHAR){
strcpy(intmp,inbuf);
linenum++;
if(Verbose)
tprintf("%s",intmp);
if(cmdparse(Cmds,inbuf,NULL) != 0){
tprintf("*** file \"%s\", line %d: %s\n",
argv[1],linenum,intmp);
}
}
fclose(fp);
free(inbuf);
free(intmp);
return 0;
}
/* if unattended mode is set - restrict ax25, telnet and maybe other sessions */
doattended(argc,argv,p)
int argc;
char *argv[];
void *p;
{
return setbool(&Attended,"Attended flag",argc,argv);
}
/* if ThirdParty is not set - restrict the mailbox (S)end command to local only */
dothirdparty(argc,argv,p)
int argc;
char *argv[];
void *p;
{
return setbool(&ThirdParty,"Third-Party mail flag",argc,argv);
}
int
domdump(argc,argv,p)
int argc;
char *argv[];
void *p;
{
unsigned int i;
char * addr;
unsigned int len = 8 * 16; /* default is 8 lines of hex dump */
if(argc < 2 || argc > 3) {
tprintf("Usage:- dump <hex-address | .> [decimal-range] \n");
return 0;
}
if(argv[1][0] == '.')
addr = DumpAddr; /* Use last end address */
else
addr = ltop(htol(argv[1])); /* get address of item being dumped */
if(argc == 3) {
len = atoi(argv[2]);
len = ((len + 15) >> 4) << 4; /* round up to modulo 16 */
}
if(len < 1 || len > 256) {
tprintf("Invalid dump range. Valid is 1 to 256\n");
return 0;
}
tprintf(" Main Memory Dump Of Location %Fp\n", addr);
tprintf("Addr (offset) Hexadecimal Ascii\n");
tprintf("---- ----------- -----\n\n");
for(i = 0; i < len; i += 16)
fmtline(i, (char *)(addr + i), 16);
DumpAddr = (char *)(addr + i); /* update address */
return 0;
}
/* Print a buffer up to 16 bytes long in formatted hex with ascii
* translation, e.g.,
* 0000: 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f 0123456789:;<=>?
*/
static void
fmtline(addr,buf,len)
int16 addr;
char *buf;
int16 len;
{
char line[81];
register char *aptr,*cptr;
register char c;
memset(line,' ',sizeof(line));
ctohex(line,(int16)hibyte(addr));
ctohex(line+2,(int16)lobyte(addr));
aptr = &line[6];
cptr = &line[55];
while(len-- != 0){
c = *buf++;
ctohex(aptr,(int16)uchar(c));
aptr += 3;
c &= 0x7f;
if((c > 0x1f) && (c < 0x7f))
*cptr++ = c;
else
*cptr++ = '.';
}
*cptr++ = '\0';
tprintf("%s\n",line);
}
/* Convert byte to two ascii-hex characters */
static void
ctohex(buf,c)
register char *buf;
register int16 c;
{
static char hex[] = "0123456789abcdef";
*buf++ = hex[hinibble(c)];
*buf = hex[lonibble(c)];
}
dostatus(argc,argv,p)
int argc;
char *argv[];
void *p;
{
time_t nowtime, elapsedtime;
unsigned int days,hrs,mins,secs;
nowtime = time(&nowtime); /* current time */
elapsedtime = nowtime - StartTime; /* nos elapsed time */
tprintf("KA9Q Internet Protocol Package, v%s\n%s\n\n",Version, Version2);
#ifdef MSDOS
tprintf("NOS load information: Code Segment = %04x - Data Segment = %04x\n\n", _CS, _DS);
#endif
tprintf("The system time is %s", ctime(&nowtime));
tprintf("NOS was started on %s\n", ctime(&StartTime));
secs = elapsedtime % 60;
elapsedtime = elapsedtime / 60;
mins = elapsedtime % 60;
elapsedtime = elapsedtime / 60;
hrs = elapsedtime % 24;
elapsedtime = elapsedtime / 24;
days = elapsedtime;
tprintf("Elapsed time => %u days:%02u hours:%02u minutes:%02u seconds.\n\n",days,hrs,mins,secs);
tprintf("The station is currently %sttended.\n", Attended ? "A" : "Una");
tprintf("The 'Message Of The Day' is ");
if(Motd != NULLCHAR)
tprintf("\n%s",Motd);
else
tprintf("not set!\n");
#ifdef __TURBOC__
dofstat(); /* print status of open files */
#endif
return 0;
}
int
domotd(argc,argv,p)
int argc;
char *argv[];
void *p;
{
if(argc > 2) {
tprintf("Usage: motd \"<your message>\"\n");
return 1;
}
if(argc < 2) {
if(Motd != NULLCHAR)
tprintf("%s",Motd);
} else {
if(Motd != NULLCHAR){
free(Motd);
Motd = NULLCHAR; /* reset the pointer */
}
if(!strlen(argv[1]))
return 0; /* clearing the buffer */
Motd = mallocw(strlen(argv[1])+5); /* allow for the EOL char etc */
strcpy(Motd, argv[1]);
strcat(Motd, "\n"); /* add the EOL char */
}
return 0;
}
#ifdef __TURBOC__
/*
* Fstat utility code.
* Converted to go into NOS by Kelvin Hill - G1EMM April 9, 1990
*/
extern unsigned char _osmajor;
static char *localcopy(char far *);
static char *progname(unsigned int);
int
dofstat()
{
union REGS regs;
struct SREGS segregs;
char far *pfiletab, far * pnext, far * fp;
char far *name, file[13], far * plist, far * entry;
char ownername[9], ownerext[5];
int nfiles, i, j, numhandles, entrylen;
unsigned int access, devinfo, progpsp;
long length, offset;
int heading = 0;
regs.h.ah = 0x52; /* DOS list of lists */
intdosx(®s, ®s, &segregs);
/* make a pointer to start of master list */
plist = (char far *) MK_FP(segregs.es, regs.x.bx);
/* pointer to start of file table */
pfiletab = (char far *) MK_FP(*(int far *) (plist + 6), *(int far *) (plist + 4));
switch (_osmajor) {
case 2:
entrylen = 40; /* DOS 2.x */
break;
case 3:
entrylen = 53; /* DOS 3.x */
break;
case 4:
case 5: /* DOS 5.x - like dos 4.x */
entrylen = 59; /* DOS 4.x - I do not know what is in the
* extra 6 bytes */
break;
default:
tprintf("Sorry, cannot handle this version of MS-DOS");
return 1;
}
for (;;) {
/* pointer to next file table */
pnext = (char far *) MK_FP(*(int far *) (pfiletab + 2), *(int far *) (pfiletab + 0));
nfiles = *(int far *) (pfiletab + 4);
#ifdef DEBUG
tprintf("\nFile table at %Fp entries for %d files\n", pfiletab, nfiles);
#endif
for (i = 0; i < nfiles; i++) {
/*
* cycle through all files, quit when we reach an
* unused entry
*/
entry = pfiletab + 6 + (i * entrylen);
if (_osmajor >= 3) {
name = entry + 32;
strncpy(file, localcopy(name), 11);
file[11] = '\0';
numhandles = *(int far *) (entry + 0);
access = (int) *(char far *) (entry + 2);
length = *(long far *) (entry + 17);
offset = *(long far *) (entry + 21);
devinfo = *(int far *) (entry + 5);
progpsp = *(int far *) (entry + 49);
} else {
name = entry + 4;
strncpy(file, localcopy(name), 11);
file[11] = '\0';
numhandles = (int) *(char far *) (entry + 0);
access = (int) *(char far *) (entry + 1);
length = *(long far *) (entry + 19);
offset = *(long far *) (entry + 36);
devinfo = (int) *(char far *) (entry + 27);
}
if ((strlen(file) > 0) && (numhandles > 0) && !(devinfo & 0x80)) {
if(!heading) {
tprintf("\n");
tprintf(" Table of Open Files.\n");
tprintf(" --------------------\n");
tprintf("Name length offset hnd acc PSP device type/owner\n");
tprintf("---- ------ ------ --- --- --- -----------------\n");
heading++; /* header now printed */
}
tprintf("%8.8s.%3.3s %8ld %8ld %2d ",
file, &file[8], length, offset, numhandles);
switch (access) {
case 0:
tprintf("r ");
break;
case 1:
tprintf("w ");
break;
case 2:
tprintf("rw ");
break;
default:
tprintf(" ");
}
if (_osmajor >= 3)
tprintf("%04X ", progpsp);
else
tprintf("---- ");
tprintf("drive %c: ", 'A' + (devinfo & 0x1F));
if (devinfo & 0x8000)
tprintf("(network) ");
if (_osmajor >= 3) {
/*
* only DOS 3+ can find out
* the name of the program
*/
fnsplit(progname(progpsp), NULL, NULL, ownername, ownerext);
tprintf(" [%s%s]\n", strlwr(ownername), strlwr(ownerext));
} else {
tprintf("\n");
}
}
if (strlen(file) == 0)
return 0;
}
pfiletab = pnext;
}
}
/* Make a copy of a string pointed to by a far pointer */
static char *
localcopy(s)
char far *s;
{
static char localstring[256];
char far *p = s;
char *l = localstring;
int i = 0;
while (*p != NULL && i++ < 255) {
*l++ = *p++;
}
*l = '\0';
return (localstring);
}
/*
* Return a near pointer to a character string with the full path name of the
* program whose PSP is given in the argument. If the argument is invalid,
* this may return gibberish but I don't know how to tell Offset 0x2C in the
* PSP in the segment address of the environment of a program. Beyond the
* last environment string is a null marker, a word count (usually 1), then
* the full pathname of the owner of the environment This only works for DOS
* 3+
*/
static char *
progname(pid)
unsigned int pid;
{
unsigned far *envsegptr; /* Pointer to seg address of
* environment */
char far *envptr; /* Pointer to pid's environment */
unsigned far *envsizeptr; /* Pointer to environment size */
unsigned envsize;/* Size of pid's environment */
unsigned ppid; /* Parent psp address */
/* find the parent process psp at offset 0x16 of the psp */
ppid = *(unsigned far *) MK_FP(pid, 0x16);
/* find the environment at offset 2Ch of the psp */
envsegptr = (unsigned far *) MK_FP(pid, 0x2C);
envptr = (char far *) MK_FP(*envsegptr, 0);
/*
* Make a pointer that contains the size of the environment block.
* Must point back one paragraph (to the environments MCB plus three
* bytes forward (to the MCB block size field).
*/
envsizeptr = (unsigned far *) MK_FP(*envsegptr - 1, 0x3);
envsize = *envsizeptr * 16; /* x 16 turns it into bytes */
while (envsize > 0) {
/* search for end of environment block, or NULL */
while (--envsize && *envptr++);
/*
* Now check for another NULL immediately following the first
* one located and a word count of 0001 following that.
*/
if (!*envptr && *(unsigned far *) (envptr + 1) == 0x1) {
envptr += 3;
break;
}
}
if (envsize > 0) {
/* Owner name found - return it */
return (localcopy(envptr));
} else {
if (pid == ppid) {
/*
* command.com doesn't leave it's name around, but if
* pid = ppid then we know we have a shell
*/
return ("-shell-");
} else {
return ("unknown");
}
}
}
#endif