OpenBSD-4.6/bin/ps/ps.c
/* $OpenBSD: ps.c,v 1.46 2008/07/18 14:24:18 kevlo Exp $ */
/* $NetBSD: ps.c,v 1.15 1995/05/18 20:33:25 mycroft Exp $ */
/*-
* 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. 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, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)ps.c 8.4 (Berkeley) 4/2/94";
#else
static char rcsid[] = "$OpenBSD: ps.c,v 1.46 2008/07/18 14:24:18 kevlo Exp $";
#endif
#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 <sys/types.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <kvm.h>
#include <nlist.h>
#include <paths.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include "ps.h"
extern char *__progname;
struct varent *vhead;
int eval; /* exit value */
int rawcpu; /* -C */
int sumrusage; /* -S */
int termwidth; /* width of screen (0 == infinity) */
int totwidth; /* calculated width of requested variables */
int ncpu = 1;
int needcomm, needenv, neednlist, commandonly;
enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
static char *kludge_oldps_options(char *);
static int pscomp(const void *, const void *);
static void scanvars(void);
static void usage(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 kvm_sysctl_only;
int
main(int argc, char *argv[])
{
struct kinfo_proc2 *kp, **kinfo;
struct varent *vent;
struct winsize ws;
struct passwd *pwd;
dev_t ttydev;
pid_t pid;
uid_t uid;
int all, ch, flag, i, fmt, lineno, nentries, mib[6];
int prtheader, wflag, kflag, what, Uflag, xflg;
char *nlistf, *memf, *swapf, errbuf[_POSIX2_LINE_MAX];
size_t size;
if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 &&
ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 &&
ioctl(STDIN_FILENO, TIOCGWINSZ, &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 = kflag = Uflag = xflg = 0;
pid = -1;
uid = 0;
ttydev = NODEV;
memf = nlistf = swapf = NULL;
while ((ch = getopt(argc, argv,
"acCeghjkLlM:mN:O:o:p:rSTt:U:uvW:wx")) != -1)
switch (ch) {
case 'a':
all = 1;
break;
case 'c':
commandonly = 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 'k':
kflag++;
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 = 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[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':
pwd = getpwnam(optarg);
if (pwd == NULL)
errx(1, "%s: no such user", optarg);
uid = pwd->pw_uid;
endpwent();
Uflag = xflg = 1;
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;
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
if (nlistf == NULL && memf == NULL && swapf == NULL) {
kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf);
kvm_sysctl_only = 1;
} else {
kd = kvm_openfiles(nlistf, memf, swapf, O_RDONLY, errbuf);
}
if (kd == NULL && (nlistf != NULL || memf != NULL || swapf != NULL))
errx(1, "%s", errbuf);
if (!fmt)
parsefmt(dfmt);
/* XXX - should be cleaner */
if (!all && ttydev == NODEV && pid == -1 && !Uflag) {
uid = getuid();
Uflag = 1;
}
/*
* scan requested variables, noting what structures are needed,
* and adjusting header widths as appropriate.
*/
scanvars();
if (neednlist && !nlistread)
(void) donlist();
/*
* get proc list
*/
if (Uflag) {
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 if (kflag) {
what = KERN_PROC_KTHREAD;
flag = 0;
} else {
what = KERN_PROC_ALL;
flag = 0;
}
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
size = sizeof(ncpu);
(void) sysctl(mib, 2, &ncpu, &size, NULL, 0);
/*
* select procs
*/
if (kd != NULL) {
kp = kvm_getproc2(kd, what, flag, sizeof(*kp), &nentries);
if (kp == NULL)
errx(1, "%s", kvm_geterr(kd));
} else {
mib[0] = CTL_KERN;
mib[1] = KERN_PROC2;
mib[2] = what;
mib[3] = flag;
mib[4] = sizeof(struct kinfo_proc2);
mib[5] = 0;
retry:
if (sysctl(mib, 6, NULL, &size, NULL, 0) < 0)
err(1, "could not get kern.proc2 size");
size = 5 * size / 4; /* extra slop */
if ((kp = malloc(size)) == NULL)
err(1,
"failed to allocate memory for proc structures");
mib[5] = (int)(size / sizeof(struct kinfo_proc2));
if (sysctl(mib, 6, kp, &size, NULL, 0) < 0) {
if (errno == ENOMEM) {
free(kp);
goto retry;
}
err(1, "could not read kern.proc2");
}
nentries = (int)(size / sizeof(struct kinfo_proc2));
}
/*
* print header
*/
printheader();
if (nentries == 0)
exit(1);
/*
* sort proc list, we convert from an array of structs to an array
* of pointers to make the sort cheaper.
*/
if ((kinfo = calloc(sizeof(*kinfo), nentries)) == NULL)
err(1, "failed to allocate memory for proc pointers");
for (i = 0; i < nentries; i++)
kinfo[i] = &kp[i];
qsort(kinfo, nentries, sizeof(*kinfo), pscomp);
/*
* for each proc, call each variable output function.
*/
for (i = lineno = 0; i < nentries; i++) {
if (xflg == 0 && ((int)kinfo[i]->p_tdev == NODEV ||
(kinfo[i]->p_flag & P_CONTROLT ) == 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(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 */
if (v->flag & COMM)
needcomm = 1;
if (v->flag & NLIST)
neednlist = 1;
}
totwidth--;
}
static int
pscomp(const void *v1, const void *v2)
{
const struct kinfo_proc2 *kp1 = *(const struct kinfo_proc2 **)v1;
const struct kinfo_proc2 *kp2 = *(const struct kinfo_proc2 **)v2;
int i;
#define VSIZE(k) ((k)->p_vm_dsize + (k)->p_vm_ssize + (k)->p_vm_tsize)
if (sortby == SORTCPU && (i = getpcpu(kp2) - getpcpu(kp1)) != 0)
return (i);
if (sortby == SORTMEM && (i = VSIZE(kp2) - VSIZE(kp1)) != 0)
return (i);
if ((i = kp1->p_tdev - kp2->p_tdev) == 0 &&
(i = kp1->p_ustart_sec - kp2->p_ustart_sec) == 0)
i = kp1->p_ustart_usec - kp2->p_ustart_usec;
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(2 + len + 1)) == 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';
/* and append the number */
(void)strlcpy(ns, cp, newopts + len + 3 - ns);
return (newopts);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: %s [-aCcehjkLlmrSTuvwx] [-M core] [-N system] [-O fmt] [-o fmt] [-p pid]\n",
__progname);
(void)fprintf(stderr,
"%-*s[-t tty] [-U username] [-W swap]\n", (int)strlen(__progname) + 8, "");
exit(1);
}