4.4BSD/usr/src/bin/ps/ps.c
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1990, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)ps.c 8.1 (Berkeley) 5/31/93";
#endif /* not lint */
#include <sys/param.h>
#include <sys/user.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <nlist.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ps.h"
#ifdef SPPWAIT
#define NEWVM
#endif
KINFO *kinfo;
struct varent *vhead, *vtail;
int eval; /* exit value */
int rawcpu; /* -C */
int sumrusage; /* -S */
int termwidth; /* width of screen (0 == infinity) */
int totwidth; /* calculated width of requested variables */
static int needuser, needcomm, needenv;
enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
static char *fmt __P((char **(*)(kvm_t *, const struct kinfo_proc *, int),
KINFO *, char *, int));
static char *kludge_oldps_options __P((char *));
static int pscomp __P((const void *, const void *));
static void saveuser __P((KINFO *));
static void scanvars __P((void));
static void usage __P((void));
char dfmt[] = "pid tt state time command";
char jfmt[] = "user pid ppid pgid sess jobc state tt time command";
char lfmt[] = "uid pid ppid cpu pri nice vsz rss wchan state tt time command";
char o1[] = "pid";
char o2[] = "tt state time command";
char ufmt[] = "user pid %cpu %mem vsz rss tt state start time command";
char vfmt[] = "pid state time sl re pagein vsz rss lim tsiz %cpu %mem command";
kvm_t *kd;
int
main(argc, argv)
int argc;
char *argv[];
{
register struct kinfo_proc *kp;
register struct varent *vent;
int nentries;
register int i;
struct winsize ws;
dev_t ttydev;
int all, ch, flag, fmt, lineno, pid, prtheader, uid, wflag, what, xflg;
char *nlistf, *memf, *swapf, errbuf[256];
if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
ioctl(STDERR_FILENO, TIOCGWINSZ, (char *)&ws) == -1 &&
ioctl(STDIN_FILENO, TIOCGWINSZ, (char *)&ws) == -1) ||
ws.ws_col == 0)
termwidth = 79;
else
termwidth = ws.ws_col - 1;
if (argc > 1)
argv[1] = kludge_oldps_options(argv[1]);
all = fmt = prtheader = wflag = xflg = 0;
pid = uid = -1;
ttydev = NODEV;
memf = nlistf = swapf = NULL;
while ((ch = getopt(argc, argv,
"aCeghjLlM:mN:O:o:p:rSTt:uvW:wx")) != EOF)
switch((char)ch) {
case 'a':
all = 1;
break;
case 'e': /* XXX set ufmt */
needenv = 1;
break;
case 'C':
rawcpu = 1;
break;
case 'g':
break; /* no-op */
case 'h':
prtheader = ws.ws_row > 5 ? ws.ws_row : 22;
break;
case 'j':
parsefmt(jfmt);
fmt = 1;
jfmt[0] = '\0';
break;
case 'L':
showkey();
exit(0);
case 'l':
parsefmt(lfmt);
fmt = 1;
lfmt[0] = '\0';
break;
case 'M':
memf = optarg;
break;
case 'm':
sortby = SORTMEM;
break;
case 'N':
nlistf = optarg;
break;
case 'O':
parsefmt(o1);
parsefmt(optarg);
parsefmt(o2);
o1[0] = o2[0] = '\0';
fmt = 1;
break;
case 'o':
parsefmt(optarg);
fmt = 1;
break;
case 'p':
pid = atoi(optarg);
xflg = 1;
break;
case 'r':
sortby = SORTCPU;
break;
case 'S':
sumrusage = 1;
break;
case 'T':
if ((optarg = ttyname(STDIN_FILENO)) == NULL)
errx(1, "stdin: not a terminal");
/* FALLTHROUGH */
case 't': {
struct stat sb;
char *ttypath, pathbuf[MAXPATHLEN];
if (strcmp(optarg, "co") == 0)
ttypath = _PATH_CONSOLE;
else if (*optarg != '/')
(void)snprintf(ttypath = pathbuf,
sizeof(pathbuf), "%s%s", _PATH_TTY, optarg);
else
ttypath = optarg;
if (stat(ttypath, &sb) == -1)
err(1, "%s", ttypath);
if (!S_ISCHR(sb.st_mode))
errx(1, "%s: not a terminal", ttypath);
ttydev = sb.st_rdev;
break;
}
case 'u':
parsefmt(ufmt);
sortby = SORTCPU;
fmt = 1;
ufmt[0] = '\0';
break;
case 'v':
parsefmt(vfmt);
sortby = SORTMEM;
fmt = 1;
vfmt[0] = '\0';
break;
case 'W':
swapf = optarg;
break;
case 'w':
if (wflag)
termwidth = UNLIMITED;
else if (termwidth < 131)
termwidth = 131;
wflag++;
break;
case 'x':
xflg = 1;
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
nlistf = *argv;
if (*++argv) {
memf = *argv;
if (*++argv)
swapf = *argv;
}
}
#endif
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (nlistf != NULL || memf != NULL || swapf != NULL)
setgid(getgid());
kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf);
if (kd == 0)
errx(1, "%s", errbuf);
if (!fmt)
parsefmt(dfmt);
if (!all && ttydev == NODEV && pid == -1) /* XXX - should be cleaner */
uid = getuid();
/*
* scan requested variables, noting what structures are needed,
* and adjusting header widths as appropiate.
*/
scanvars();
/*
* get proc list
*/
if (uid != -1) {
what = KERN_PROC_UID;
flag = uid;
} else if (ttydev != NODEV) {
what = KERN_PROC_TTY;
flag = ttydev;
} else if (pid != -1) {
what = KERN_PROC_PID;
flag = pid;
} else {
what = KERN_PROC_ALL;
flag = 0;
}
/*
* select procs
*/
if ((kp = kvm_getprocs(kd, what, flag, &nentries)) == 0)
errx(1, "%s", kvm_geterr(kd));
if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
err(1, NULL);
for (i = nentries; --i >= 0; ++kp) {
kinfo[i].ki_p = kp;
if (needuser)
saveuser(&kinfo[i]);
}
/*
* print header
*/
printheader();
if (nentries == 0)
exit(0);
/*
* sort proc list
*/
qsort(kinfo, nentries, sizeof(KINFO), pscomp);
/*
* for each proc, call each variable output function.
*/
for (i = lineno = 0; i < nentries; i++) {
if (xflg == 0 && (KI_EPROC(&kinfo[i])->e_tdev == NODEV ||
(KI_PROC(&kinfo[i])->p_flag & SCTTY ) == 0))
continue;
for (vent = vhead; vent; vent = vent->next) {
(vent->var->oproc)(&kinfo[i], vent);
if (vent->next != NULL)
(void)putchar(' ');
}
(void)putchar('\n');
if (prtheader && lineno++ == prtheader - 4) {
(void)putchar('\n');
printheader();
lineno = 0;
}
}
exit(eval);
}
static void
scanvars()
{
register struct varent *vent;
register VAR *v;
register int i;
for (vent = vhead; vent; vent = vent->next) {
v = vent->var;
i = strlen(v->header);
if (v->width < i)
v->width = i;
totwidth += v->width + 1; /* +1 for space */
if (v->flag & USER)
needuser = 1;
if (v->flag & COMM)
needcomm = 1;
}
totwidth--;
}
static char *
fmt(fn, ki, comm, maxlen)
char **(*fn) __P((kvm_t *, const struct kinfo_proc *, int));
KINFO *ki;
char *comm;
int maxlen;
{
register char *s;
if ((s =
fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen)) == NULL)
err(1, NULL);
return (s);
}
static void
saveuser(ki)
KINFO *ki;
{
register struct usave *usp = &ki->ki_u;
struct pstats pstats;
extern char *fmt_argv();
if (kvm_read(kd, (u_long)&KI_PROC(ki)->p_addr->u_stats,
(char *)&pstats, sizeof(pstats)) == sizeof(pstats)) {
/*
* The u-area might be swapped out, and we can't get
* at it because we have a crashdump and no swap.
* If it's here fill in these fields, otherwise, just
* leave them 0.
*/
usp->u_start = pstats.p_start;
usp->u_ru = pstats.p_ru;
usp->u_cru = pstats.p_cru;
usp->u_valid = 1;
} else
usp->u_valid = 0;
/*
* save arguments if needed
*/
if (needcomm)
ki->ki_args = fmt(kvm_getargv, ki, KI_PROC(ki)->p_comm,
MAXCOMLEN);
else
ki->ki_args = NULL;
if (needenv)
ki->ki_env = fmt(kvm_getenvv, ki, (char *)NULL, 0);
else
ki->ki_env = NULL;
}
static int
pscomp(a, b)
const void *a, *b;
{
int i;
#ifdef NEWVM
#define VSIZE(k) (KI_EPROC(k)->e_vm.vm_dsize + KI_EPROC(k)->e_vm.vm_ssize + \
KI_EPROC(k)->e_vm.vm_tsize)
#else
#define VSIZE(k) ((k)->ki_p->p_dsize + (k)->ki_p->p_ssize + (k)->ki_e->e_xsize)
#endif
if (sortby == SORTCPU)
return (getpcpu((KINFO *)b) - getpcpu((KINFO *)a));
if (sortby == SORTMEM)
return (VSIZE((KINFO *)b) - VSIZE((KINFO *)a));
i = KI_EPROC((KINFO *)a)->e_tdev - KI_EPROC((KINFO *)b)->e_tdev;
if (i == 0)
i = KI_PROC((KINFO *)a)->p_pid - KI_PROC((KINFO *)b)->p_pid;
return (i);
}
/*
* ICK (all for getopt), would rather hide the ugliness
* here than taint the main code.
*
* ps foo -> ps -foo
* ps 34 -> ps -p34
*
* The old convention that 't' with no trailing tty arg means the users
* tty, is only supported if argv[1] doesn't begin with a '-'. This same
* feature is available with the option 'T', which takes no argument.
*/
static char *
kludge_oldps_options(s)
char *s;
{
size_t len;
char *newopts, *ns, *cp;
len = strlen(s);
if ((newopts = ns = malloc(len + 2)) == NULL)
err(1, NULL);
/*
* options begin with '-'
*/
if (*s != '-')
*ns++ = '-'; /* add option flag */
/*
* gaze to end of argv[1]
*/
cp = s + len - 1;
/*
* if last letter is a 't' flag with no argument (in the context
* of the oldps options -- option string NOT starting with a '-' --
* then convert to 'T' (meaning *this* terminal, i.e. ttyname(0)).
*/
if (*cp == 't' && *s != '-')
*cp = 'T';
else {
/*
* otherwise check for trailing number, which *may* be a
* pid.
*/
while (cp >= s && isdigit(*cp))
--cp;
}
cp++;
memmove(ns, s, (size_t)(cp - s)); /* copy up to trailing number */
ns += cp - s;
/*
* if there's a trailing number, and not a preceding 'p' (pid) or
* 't' (tty) flag, then assume it's a pid and insert a 'p' flag.
*/
if (isdigit(*cp) && (cp == s || cp[-1] != 't' && cp[-1] != 'p' &&
(cp - 1 == s || cp[-2] != 't')))
*ns++ = 'p';
(void)strcpy(ns, cp); /* and append the number */
return (newopts);
}
static void
usage()
{
(void)fprintf(stderr,
"usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty]\n\t [-M core] [-N system] [-W swap]\n ps [-L]\n");
exit(1);
}