/*-
* Copyright (c) 1990, 1993, 1994
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1990, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#if 0
#ifndef lint
static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94";
#endif /* not lint */
#endif
#include <sys/param.h>
#include <sys/user.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <locale.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <utmp.h>
#include "lomac.h"
#include "ps.h"
#define SEP ", \t" /* username separators */
static KINFO *kinfo;
struct varent *vhead;
int eval; /* exit value */
int cflag; /* -c */
int rawcpu; /* -C */
int sumrusage; /* -S */
int termwidth; /* width of screen (0 == infinity) */
int totwidth; /* calculated width of requested variables */
time_t now; /* current time(3) value */
static int needuser, needcomm, needenv;
#if defined(LAZY_PS)
static int forceuread=0;
#else
static int forceuread=1;
#endif
static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
static const char *fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int),
KINFO *, char *, int);
static char *kludge_oldps_options(char *);
static int pscomp(const void *, const void *);
static void saveuser(KINFO *);
static void scanvars(void);
static void dynsizevars(KINFO *);
static void sizevars(void);
static void usage(void);
static uid_t *getuids(const char *, int *);
static char dfmt[] = "pid,tt,state,time,command";
static char jfmt[] = "user,pid,ppid,pgid,jobc,state,tt,time,command";
static char lfmt[] = "uid,pid,ppid,cpu,pri,nice,vsz,rss,mwchan,state,tt,time,command";
static char o1[] = "pid";
static char o2[] = "tt,state,time,command";
static char ufmt[] = "user,pid,%cpu,%mem,vsz,rss,tt,state,start,time,command";
static char vfmt[] = "pid,state,time,sl,re,pagein,vsz,rss,lim,tsiz,%cpu,%mem,command";
static char Zfmt[] = "lvl";
static kvm_t *kd;
int
main(int argc, char *argv[])
{
struct kinfo_proc *kp;
struct varent *vent;
struct winsize ws;
dev_t ttydev;
pid_t pid;
uid_t *uids;
int all, ch, flag, i, _fmt, lineno, nentries, dropgid;
int prtheader, wflag, what, xflg, uid, nuids;
char *cols;
char errbuf[_POSIX2_LINE_MAX];
const char *nlistf, *memf;
(void) setlocale(LC_ALL, "");
/* Set the time to what it is right now. */
time(&now);
if ((cols = getenv("COLUMNS")) != NULL && *cols != '\0')
termwidth = atoi(cols);
else 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 = -1;
nuids = 0;
uids = NULL;
ttydev = NODEV;
dropgid = 0;
memf = nlistf = _PATH_DEVNULL;
while ((ch = getopt(argc, argv,
#if defined(LAZY_PS)
"aCcefghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1)
#else
"aCceghjLlM:mN:O:o:p:rSTt:U:uvwxZ")) != -1)
#endif
switch((char)ch) {
case 'a':
all = 1;
break;
case 'C':
rawcpu = 1;
break;
case 'c':
cflag = 1;
break;
case 'e': /* XXX set ufmt */
needenv = 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;
dropgid = 1;
break;
case 'm':
sortby = SORTMEM;
break;
case 'N':
nlistf = optarg;
dropgid = 1;
break;
case 'O':
parsefmt(o1);
parsefmt(optarg);
parsefmt(o2);
o1[0] = o2[0] = '\0';
_fmt = 1;
break;
case 'o':
parsefmt(optarg);
_fmt = 1;
break;
#if defined(LAZY_PS)
case 'f':
if (getuid() == 0 || getgid() == 0)
forceuread = 1;
break;
#endif
case 'p':
pid = atol(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[PATH_MAX];
if (strcmp(optarg, "co") == 0)
ttypath = strdup(_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':
uids = getuids(optarg, &nuids);
xflg++; /* XXX: intuitive? */
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':
if (wflag)
termwidth = UNLIMITED;
else if (termwidth < 131)
termwidth = 131;
wflag++;
break;
case 'x':
xflg = 1;
break;
case 'Z':
parsefmt(Zfmt);
Zfmt[0] = '\0';
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
nlistf = *argv;
if (*++argv) {
memf = *argv;
}
}
#endif
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (dropgid) {
setgid(getgid());
setuid(getuid());
}
kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
if (kd == 0)
errx(1, "%s", errbuf);
if (!_fmt)
parsefmt(dfmt);
/* XXX - should be cleaner */
if (!all && ttydev == NODEV && pid == -1 && !nuids) {
if ((uids = malloc(sizeof (*uids))) == NULL)
errx(1, "malloc failed");
nuids = 1;
*uids = getuid();
}
/*
* scan requested variables, noting what structures are needed,
* and adjusting header widths as appropriate.
*/
scanvars();
/*
* get proc list
*/
if (nuids == 1) {
what = KERN_PROC_UID;
flag = *uids;
} 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 || nentries < 0)
errx(1, "%s", kvm_geterr(kd));
if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
errx(1, "malloc failed");
for (i = nentries; --i >= 0; ++kp) {
kinfo[i].ki_p = kp;
if (needuser)
saveuser(&kinfo[i]);
dynsizevars(&kinfo[i]);
}
sizevars();
/*
* print header
*/
printheader();
if (nentries == 0)
exit(1);
/*
* 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 && ((&kinfo[i])->ki_p->ki_tdev == NODEV ||
((&kinfo[i])->ki_p->ki_flag & P_CONTROLT ) == 0))
continue;
if (nuids > 1) {
for (uid = 0; uid < nuids; uid++)
if ((&kinfo[i])->ki_p->ki_uid == uids[uid])
break;
if (uid == nuids)
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;
}
}
free(uids);
lomac_stop();
exit(eval);
}
uid_t *
getuids(const char *arg, int *nuids)
{
char name[UT_NAMESIZE + 1];
struct passwd *pwd;
uid_t *uids, *moreuids;
int alloc;
size_t l;
alloc = 0;
*nuids = 0;
uids = NULL;
for (; (l = strcspn(arg, SEP)) > 0; arg += l + strspn(arg + l, SEP)) {
if (l >= sizeof name) {
warnx("%.*s: name too long", (int)l, arg);
continue;
}
strncpy(name, arg, l);
name[l] = '\0';
if ((pwd = getpwnam(name)) == NULL) {
warnx("%s: no such user", name);
continue;
}
if (*nuids >= alloc) {
alloc = (alloc + 1) << 1;
moreuids = realloc(uids, alloc * sizeof (*uids));
if (moreuids == NULL) {
free(uids);
errx(1, "realloc failed");
}
uids = moreuids;
}
uids[(*nuids)++] = pwd->pw_uid;
}
endpwent();
if (!*nuids)
errx(1, "No users specified");
return uids;
}
static void
scanvars(void)
{
struct varent *vent;
VAR *v;
for (vent = vhead; vent; vent = vent->next) {
v = vent->var;
if (v->flag & DSIZ) {
v->dwidth = v->width;
v->width = 0;
}
if (v->flag & USER)
needuser = 1;
if (v->flag & COMM)
needcomm = 1;
}
}
static void
dynsizevars(KINFO *ki)
{
struct varent *vent;
VAR *v;
int i;
for (vent = vhead; vent; vent = vent->next) {
v = vent->var;
if (!(v->flag & DSIZ))
continue;
i = (v->sproc)( ki);
if (v->width < i)
v->width = i;
if (v->width > v->dwidth)
v->width = v->dwidth;
}
}
static void
sizevars(void)
{
struct varent *vent;
VAR *v;
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 */
}
totwidth--;
}
static const char *
fmt(char **(*fn)(kvm_t *, const struct kinfo_proc *, int), KINFO *ki,
char *comm, int maxlen)
{
const char *s;
s = fmt_argv((*fn)(kd, ki->ki_p, termwidth), comm, maxlen);
return (s);
}
#define UREADOK(ki) (forceuread || (ki->ki_p->ki_sflag & PS_INMEM))
static void
saveuser(KINFO *ki)
{
if (ki->ki_p->ki_sflag & PS_INMEM) {
/*
* 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.
*/
ki->ki_valid = 1;
} else
ki->ki_valid = 0;
/*
* save arguments if needed
*/
if (needcomm && (UREADOK(ki) || (ki->ki_p->ki_args != NULL))) {
ki->ki_args = strdup(fmt(kvm_getargv, ki, ki->ki_p->ki_comm,
MAXCOMLEN));
} else if (needcomm) {
asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm);
} else {
ki->ki_args = NULL;
}
if (needenv && UREADOK(ki)) {
ki->ki_env = strdup(fmt(kvm_getenvv, ki, (char *)NULL, 0));
} else if (needenv) {
ki->ki_env = malloc(3);
strcpy(ki->ki_env, "()");
} else {
ki->ki_env = NULL;
}
}
static int
pscomp(const void *a, const void *b)
{
int i;
#define VSIZE(k) ((k)->ki_p->ki_dsize + (k)->ki_p->ki_ssize + \
(k)->ki_p->ki_tsize)
if (sortby == SORTCPU)
return (getpcpu((const KINFO *)b) - getpcpu((const KINFO *)a));
if (sortby == SORTMEM)
return (VSIZE((const KINFO *)b) - VSIZE((const KINFO *)a));
i = (int)((const KINFO *)a)->ki_p->ki_tdev - (int)((const KINFO *)b)->ki_p->ki_tdev;
if (i == 0)
i = ((const KINFO *)a)->ki_p->ki_pid - ((const KINFO *)b)->ki_p->ki_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(char *s)
{
size_t len;
char *newopts, *ns, *cp;
len = strlen(s);
if ((newopts = ns = malloc(len + 2)) == NULL)
errx(1, "malloc failed");
/*
* 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)).
*
* However, if a flag accepting a string argument is found in the
* option string, the remainder of the string is the argument to
* that flag; do not modify that argument.
*/
if (strcspn(s, "MNOoU") == len && *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)
{
(void)fprintf(stderr, "%s\n%s\n%s\n",
"usage: ps [-aChjlmrSTuvwx] [-O|o fmt] [-p pid] [-t tty] [-U user]",
" [-M core] [-N system]",
" ps [-L]");
exit(1);
}
