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freebsd-skq/bin/ps/ps.c

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/*-
* 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.
* ------+---------+---------+-------- + --------+---------+---------+---------*
* Copyright (c) 2004 - Garance Alistair Drosehn <gad@FreeBSD.org>.
* All rights reserved.
*
* Significant modifications made to bring `ps' options somewhat closer
* to the standard for `ps' as described in SingleUnixSpec-v3.
* ------+---------+---------+-------- + --------+---------+---------+---------*
*/
#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/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/user.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 <grp.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 "ps.h"
#define W_SEP " \t" /* "Whitespace" list separators */
#define T_SEP "," /* "Terminate-element" list separators */
#ifdef LAZY_PS
#define DEF_UREAD 0
#define OPT_LAZY_f "f"
#else
#define DEF_UREAD 1 /* Always do the more-expensive read. */
#define OPT_LAZY_f /* I.e., the `-f' option is not added. */
#endif
int cflag; /* -c */
int eval; /* Exit value */
time_t now; /* Current time(3) value */
int rawcpu; /* -C */
int sumrusage; /* -S */
int termwidth; /* Width of the screen (0 == infinity). */
int totwidth; /* Calculated-width of requested variables. */
struct varent *vhead;
static int forceuread = DEF_UREAD; /* Do extra work to get u-area. */
static kvm_t *kd;
static KINFO *kinfo;
static int needcomm; /* -o "command" */
static int needenv; /* -e */
static int needuser; /* -o "user" */
static int optfatal; /* Fatal error parsing some list-option. */
static enum sort { DEFAULT, SORTMEM, SORTCPU } sortby = DEFAULT;
struct listinfo;
typedef int addelem_rtn(struct listinfo *_inf, const char *_elem);
struct listinfo {
int count;
int maxcount;
int elemsize;
addelem_rtn *addelem;
const char *lname;
union {
gid_t *gids;
pid_t *pids;
dev_t *ttys;
uid_t *uids;
void *ptr;
} l;
};
static int addelem_gid(struct listinfo *, const char *);
static int addelem_pid(struct listinfo *, const char *);
static int addelem_tty(struct listinfo *, const char *);
static int addelem_uid(struct listinfo *, const char *);
static void add_list(struct listinfo *, const char *);
static void dynsizevars(KINFO *);
static void *expand_list(struct listinfo *);
static const char *
fmt(char **(*)(kvm_t *, const struct kinfo_proc *, int),
KINFO *, char *, int);
static void free_list(struct listinfo *);
static void init_list(struct listinfo *, addelem_rtn, int, const char *);
static char *kludge_oldps_options(char *);
static int pscomp(const void *, const void *);
static void saveuser(KINFO *);
static void scanvars(void);
static void sizevars(void);
static void usage(void);
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[] = "label";
#define PS_ARGS "AaCce" OPT_LAZY_f "G:gHhjLlM:mN:O:o:p:rSTt:U:uvwXxZ"
int
main(int argc, char *argv[])
{
struct listinfo gidlist, pgrplist, pidlist;
struct listinfo ruidlist, sesslist, ttylist, uidlist;
struct kinfo_proc *kp;
struct varent *vent;
struct winsize ws;
const char *cp, *nlistf, *memf;
char *cols;
int all, ch, dropgid, elem, flag, _fmt, i, lineno;
int nentries, nocludge, nkept, nselectors;
int prtheader, showthreads, wflag, what, xkeep, xkeep_implied;
char errbuf[_POSIX2_LINE_MAX];
(void) setlocale(LC_ALL, "");
time(&now); /* Used by routines in print.c. */
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;
/*
* Don't apply a kludge if the first argument is an option taking an
* argument
*/
if (argc > 1) {
nocludge = 0;
if (argv[1][0] == '-') {
for (cp = PS_ARGS; *cp != '\0'; cp++) {
if (*cp != ':')
continue;
if (*(cp - 1) == argv[1][1]) {
nocludge = 1;
break;
}
}
}
if (nocludge == 0)
argv[1] = kludge_oldps_options(argv[1]);
}
all = dropgid = _fmt = nselectors = optfatal = 0;
prtheader = showthreads = wflag = xkeep_implied = 0;
xkeep = -1; /* Neither -x nor -X. */
init_list(&gidlist, addelem_gid, sizeof(gid_t), "group");
init_list(&pgrplist, addelem_pid, sizeof(pid_t), "process group");
init_list(&pidlist, addelem_pid, sizeof(pid_t), "process id");
init_list(&ruidlist, addelem_uid, sizeof(uid_t), "ruser");
init_list(&sesslist, addelem_pid, sizeof(pid_t), "session id");
init_list(&ttylist, addelem_tty, sizeof(dev_t), "tty");
init_list(&uidlist, addelem_uid, sizeof(uid_t), "user");
memf = nlistf = _PATH_DEVNULL;
while ((ch = getopt(argc, argv, PS_ARGS)) != -1)
switch((char)ch) {
case 'A':
/*
* Exactly the same as `-ax'. This has been
* added for compatability with SUSv3, but for
* now it will not be described in the man page.
*/
nselectors++;
all = xkeep = 1;
break;
case 'a':
nselectors++;
all = 1;
break;
case 'C':
rawcpu = 1;
break;
case 'c':
cflag = 1;
break;
case 'e': /* XXX set ufmt */
needenv = 1;
break;
#ifdef LAZY_PS
case 'f':
if (getuid() == 0 || getgid() == 0)
forceuread = 1;
break;
#endif
case 'G':
add_list(&gidlist, optarg);
xkeep_implied = 1;
nselectors++;
break;
case 'g':
#if 0
/*-
* XXX - This SUSv3 behavior is still under debate
* since it conflicts with the (undocumented)
* `-g' option. So we skip it for now.
*/
add_list(&pgrplist, optarg);
xkeep_implied = 1;
nselectors++;
break;
#else
/* The historical BSD-ish (from SunOS) behavior. */
break; /* no-op */
#endif
case 'H':
showthreads = KERN_PROC_INC_THREAD;
break;
case 'h':
prtheader = ws.ws_row > 5 ? ws.ws_row : 22;
break;
case 'j':
parsefmt(jfmt, 0);
_fmt = 1;
jfmt[0] = '\0';
break;
case 'L':
showkey();
exit(0);
case 'l':
parsefmt(lfmt, 0);
_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, 1);
parsefmt(optarg, 1);
parsefmt(o2, 1);
o1[0] = o2[0] = '\0';
_fmt = 1;
break;
case 'o':
parsefmt(optarg, 1);
_fmt = 1;
break;
case 'p':
add_list(&pidlist, optarg);
/*
* Note: `-p' does not *set* xkeep, but any values
* from pidlist are checked before xkeep is. That
* way they are always matched, even if the user
* specifies `-X'.
*/
nselectors++;
break;
#if 0
case 'R':
/*-
* XXX - This un-standard option is still under
* debate. This is what SUSv3 defines as
* the `-U' option, and while it would be
* nice to have, it could cause even more
* confusion to implement it as `-R'.
*/
add_list(&ruidlist, optarg);
xkeep_implied = 1;
nselectors++;
break;
#endif
case 'r':
sortby = SORTCPU;
break;
case 'S':
sumrusage = 1;
break;
#if 0
case 's':
/*-
* XXX - This non-standard option is still under
* debate. This *is* supported on Solaris,
* Linux, and IRIX, but conflicts with `-s'
* on NetBSD and maybe some older BSD's.
*/
add_list(&sesslist, optarg);
xkeep_implied = 1;
nselectors++;
break;
#endif
case 'T':
if ((optarg = ttyname(STDIN_FILENO)) == NULL)
errx(1, "stdin: not a terminal");
/* FALLTHROUGH */
case 't':
add_list(&ttylist, optarg);
xkeep_implied = 1;
nselectors++;
break;
case 'U':
/* This is what SUSv3 defines as the `-u' option. */
add_list(&uidlist, optarg);
xkeep_implied = 1;
nselectors++;
break;
case 'u':
parsefmt(ufmt, 0);
sortby = SORTCPU;
_fmt = 1;
ufmt[0] = '\0';
break;
case 'v':
parsefmt(vfmt, 0);
sortby = SORTMEM;
_fmt = 1;
vfmt[0] = '\0';
break;
case 'w':
if (wflag)
termwidth = UNLIMITED;
else if (termwidth < 131)
termwidth = 131;
wflag++;
break;
case 'X':
/*
* Note that `-X' and `-x' are not standard "selector"
* options. For most selector-options, we check *all*
* processes to see if any are matched by the given
* value(s). After we have a set of all the matched
* processes, then `-X' and `-x' govern whether we
* modify that *matched* set for processes which do
* not have a controlling terminal. `-X' causes
* those processes to be deleted from the matched
* set, while `-x' causes them to be kept.
*/
xkeep = 0;
break;
case 'x':
xkeep = 1;
break;
case 'Z':
parsefmt(Zfmt, 0);
Zfmt[0] = '\0';
break;
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
if (optfatal)
exit(1); /* Error messages already printed. */
if (xkeep < 0) /* Neither -X nor -x was specified. */
xkeep = xkeep_implied;
#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, 0);
if (nselectors == 0) {
uidlist.l.ptr = malloc(sizeof(uid_t));
if (uidlist.l.ptr == NULL)
errx(1, "malloc failed");
nselectors = 1;
uidlist.count = uidlist.maxcount = 1;
*uidlist.l.uids = getuid();
}
/*
* scan requested variables, noting what structures are needed,
* and adjusting header widths as appropriate.
*/
scanvars();
/*
* Get process list. If the user requested just one selector-
* option, then kvm_getprocs can be asked to return just those
* processes. Otherwise, have it return all processes, and
* then this routine will search that full list and select the
* processes which match any of the user's selector-options.
*/
what = showthreads != 0 ? KERN_PROC_ALL : KERN_PROC_PROC;
flag = 0;
if (nselectors == 1) {
/* XXX - Apparently there's no KERN_PROC_GID flag. */
if (pgrplist.count == 1) {
what = KERN_PROC_PGRP | showthreads;
flag = *pgrplist.l.pids;
nselectors = 0;
} else if (pidlist.count == 1) {
what = KERN_PROC_PID | showthreads;
flag = *pidlist.l.pids;
nselectors = 0;
} else if (ruidlist.count == 1) {
what = KERN_PROC_RUID | showthreads;
flag = *ruidlist.l.uids;
nselectors = 0;
#if 0
/*-
* XXX - KERN_PROC_SESSION causes error in kvm_getprocs?
* For now, always do sid-matching in this routine.
*/
} else if (sesslist.count == 1) {
what = KERN_PROC_SESSION | showthreads;
flag = *sesslist.l.pids;
nselectors = 0;
#endif
} else if (ttylist.count == 1) {
what = KERN_PROC_TTY | showthreads;
flag = *ttylist.l.ttys;
nselectors = 0;
} else if (uidlist.count == 1) {
what = KERN_PROC_UID | showthreads;
flag = *uidlist.l.uids;
nselectors = 0;
} else if (all) {
/* No need for this routine to select processes. */
nselectors = 0;
}
}
/*
* select procs
*/
nentries = -1;
kp = kvm_getprocs(kd, what, flag, &nentries);
if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0))
errx(1, "%s", kvm_geterr(kd));
nkept = 0;
if (nentries > 0) {
if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
errx(1, "malloc failed");
for (i = nentries; --i >= 0; ++kp) {
/*
* If the user specified multiple selection-criteria,
* then keep any process matched by the inclusive OR
* of all the selection-criteria given.
*/
if (pidlist.count > 0) {
for (elem = 0; elem < pidlist.count; elem++)
if (kp->ki_pid == pidlist.l.pids[elem])
goto keepit;
}
/*
* Note that we had to process pidlist before
* filtering out processes which do not have
* a controlling terminal.
*/
if (xkeep == 0) {
if ((kp->ki_tdev == NODEV ||
(kp->ki_flag & P_CONTROLT) == 0))
continue;
}
if (nselectors == 0)
goto keepit;
if (gidlist.count > 0) {
for (elem = 0; elem < gidlist.count; elem++)
if (kp->ki_rgid == gidlist.l.gids[elem])
goto keepit;
}
if (pgrplist.count > 0) {
for (elem = 0; elem < pgrplist.count; elem++)
if (kp->ki_pgid ==
pgrplist.l.pids[elem])
goto keepit;
}
if (ruidlist.count > 0) {
for (elem = 0; elem < ruidlist.count; elem++)
if (kp->ki_ruid ==
ruidlist.l.uids[elem])
goto keepit;
}
if (sesslist.count > 0) {
for (elem = 0; elem < sesslist.count; elem++)
if (kp->ki_sid == sesslist.l.pids[elem])
goto keepit;
}
if (ttylist.count > 0) {
for (elem = 0; elem < ttylist.count; elem++)
if (kp->ki_tdev == ttylist.l.ttys[elem])
goto keepit;
}
if (uidlist.count > 0) {
for (elem = 0; elem < uidlist.count; elem++)
if (kp->ki_uid == uidlist.l.uids[elem])
goto keepit;
}
/*
* This process did not match any of the user's
* selector-options, so skip the process.
*/
continue;
keepit:
kinfo[nkept].ki_p = kp;
if (needuser)
saveuser(&kinfo[nkept]);
dynsizevars(&kinfo[nkept]);
nkept++;
}
}
sizevars();
/*
* print header
*/
printheader();
if (nkept == 0)
exit(1);
/*
* sort proc list
*/
qsort(kinfo, nkept, sizeof(KINFO), pscomp);
/*
* For each process, call each variable output function.
*/
for (i = lineno = 0; i < nkept; i++) {
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_list(&gidlist);
free_list(&pidlist);
free_list(&pgrplist);
free_list(&ruidlist);
free_list(&sesslist);
free_list(&ttylist);
free_list(&uidlist);
exit(eval);
}
static int
addelem_gid(struct listinfo *inf, const char *elem)
{
struct group *grp;
const char *nameorID;
char *endp;
u_long bigtemp;
if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) {
if (*elem == '\0')
warnx("Invalid (zero-length) %s name", inf->lname);
else
warnx("%s name too long: %s", inf->lname, elem);
optfatal = 1;
return (0); /* Do not add this value. */
}
/*
* SUSv3 states that `ps -G grouplist' should match "real-group
* ID numbers", and does not mention group-names. I do want to
* also support group-names, so this tries for a group-id first,
* and only tries for a name if that doesn't work. This is the
* opposite order of what is done in addelem_uid(), but in
* practice the order would only matter for group-names which
* are all-numeric.
*/
grp = NULL;
nameorID = "named";
errno = 0;
bigtemp = strtoul(elem, &endp, 10);
if (errno == 0 && *endp == '\0' && bigtemp <= GID_MAX) {
nameorID = "name or ID matches";
grp = getgrgid((gid_t)bigtemp);
}
if (grp == NULL)
grp = getgrnam(elem);
if (grp == NULL) {
warnx("No %s %s '%s'", inf->lname, nameorID, elem);
optfatal = 1;
return (0); /* Do not add this value. */
}
if (inf->count >= inf->maxcount)
expand_list(inf);
inf->l.gids[(inf->count)++] = grp->gr_gid;
return (1);
}
#define BSD_PID_MAX 99999 /* Copy of PID_MAX from sys/proc.h. */
static int
addelem_pid(struct listinfo *inf, const char *elem)
{
char *endp;
long tempid;
if (*elem == '\0')
tempid = 0L;
else {
errno = 0;
tempid = strtol(elem, &endp, 10);
if (*endp != '\0' || tempid < 0 || elem == endp) {
warnx("Invalid %s: %s", inf->lname, elem);
errno = ERANGE;
} else if (errno != 0 || tempid > BSD_PID_MAX) {
warnx("%s too large: %s", inf->lname, elem);
errno = ERANGE;
}
if (errno == ERANGE) {
optfatal = 1;
return (0); /* Do not add this value. */
}
}
if (inf->count >= inf->maxcount)
expand_list(inf);
inf->l.pids[(inf->count)++] = tempid;
return (1);
}
#undef BSD_PID_MAX
static int
addelem_tty(struct listinfo *inf, const char *elem)
{
const char *ttypath;
struct stat sb;
char pathbuf[PATH_MAX];
if (strcmp(elem, "co") == 0)
ttypath = strdup(_PATH_CONSOLE);
else if (*elem == '/')
ttypath = elem;
else {
strlcpy(pathbuf, _PATH_TTY, sizeof(pathbuf));
strlcat(pathbuf, elem, sizeof(pathbuf));
ttypath = pathbuf;
}
if (stat(ttypath, &sb) == -1) {
warn("%s", ttypath);
optfatal = 1;
return (0); /* Do not add this value. */
}
if (!S_ISCHR(sb.st_mode)) {
warn("%s: Not a terminal", ttypath);
optfatal = 1;
return (0); /* Do not add this value. */
}
if (inf->count >= inf->maxcount)
expand_list(inf);
inf->l.ttys[(inf->count)++] = sb.st_rdev;
return (1);
}
static int
addelem_uid(struct listinfo *inf, const char *elem)
{
struct passwd *pwd;
char *endp;
u_long bigtemp;
if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) {
if (*elem == '\0')
warnx("Invalid (zero-length) %s name", inf->lname);
else
warnx("%s name too long: %s", inf->lname, elem);
optfatal = 1;
return (0); /* Do not add this value. */
}
pwd = getpwnam(elem);
if (pwd == NULL) {
errno = 0;
bigtemp = strtoul(elem, &endp, 10);
if (errno != 0 || *endp != '\0' || bigtemp > UID_MAX)
warnx("No %s named '%s'", inf->lname, elem);
else {
/* The string is all digits, so it might be a userID. */
pwd = getpwuid((uid_t)bigtemp);
if (pwd == NULL)
warnx("No %s name or ID matches '%s'",
inf->lname, elem);
}
}
if (pwd == NULL) {
/*
* These used to be treated as minor warnings (and the
* option was simply ignored), but now they are fatal
* errors (and the command will be aborted).
*/
optfatal = 1;
return (0); /* Do not add this value. */
}
if (inf->count >= inf->maxcount)
expand_list(inf);
inf->l.uids[(inf->count)++] = pwd->pw_uid;
return (1);
}
static void
add_list(struct listinfo *inf, const char *argp)
{
const char *savep;
char *cp, *endp;
int toolong;
char elemcopy[PATH_MAX];
while (*argp != '\0') {
while (*argp != '\0' && strchr(W_SEP, *argp) != NULL)
argp++;
savep = argp;
toolong = 0;
cp = elemcopy;
if (strchr(T_SEP, *argp) == NULL) {
endp = elemcopy + sizeof(elemcopy) - 1;
while (*argp != '\0' && cp <= endp &&
strchr(W_SEP T_SEP, *argp) == NULL)
*cp++ = *argp++;
if (cp > endp)
toolong = 1;
}
if (!toolong) {
*cp = '\0';
#ifndef ADD_PS_LISTRESET
/*
* This is how the standard expects lists to
* be handled.
*/
inf->addelem(inf, elemcopy);
#else
/*-
* This would add a simple non-standard-but-convienent
* feature.
*
* XXX - The first time I tried to add this check,
* it increased the total size of `ps' by 3940
* bytes on i386! That's 12% of the entire
* program! The `ps.o' file grew by only about
* 40 bytes, but the final (stripped) executable
* in /bin/ps grew by 12%. I have not had time
* to investigate, so skip the feature for now.
*/
/*
* We now have a single element. Add it to the
* list, unless the element is ":". In that case,
* reset the list so previous entries are ignored.
*/
if (strcmp(elemcopy, ":") == 0)
inf->count = 0;
else
inf->addelem(inf, elemcopy);
#endif
} else {
/*
* The string is too long to copy. Find the end
* of the string to print out the warning message.
*/
while (*argp != '\0' && strchr(W_SEP T_SEP,
*argp) == NULL)
argp++;
warnx("Value too long: %.*s", (int)(argp - savep),
savep);
optfatal = 1;
}
/*
* Skip over any number of trailing whitespace characters,
* but only one (at most) trailing element-terminating
* character.
*/
while (*argp != '\0' && strchr(W_SEP, *argp) != NULL)
argp++;
if (*argp != '\0' && strchr(T_SEP, *argp) != NULL) {
argp++;
/* Catch case where string ended with a comma. */
if (*argp == '\0')
inf->addelem(inf, argp);
}
}
}
static void *
expand_list(struct listinfo *inf)
{
void *newlist;
int newmax;
newmax = (inf->maxcount + 1) << 1;
newlist = realloc(inf->l.ptr, newmax * inf->elemsize);
if (newlist == NULL) {
free(inf->l.ptr);
errx(1, "realloc to %d %ss failed", newmax,
inf->lname);
}
inf->maxcount = newmax;
inf->l.ptr = newlist;
return (newlist);
}
static void
free_list(struct listinfo *inf)
{
inf->count = inf->elemsize = inf->maxcount = 0;
if (inf->l.ptr != NULL)
free(inf->l.ptr);
inf->addelem = NULL;
inf->lname = NULL;
inf->l.ptr = NULL;
}
static void
init_list(struct listinfo *inf, addelem_rtn artn, int elemsize,
const char *lname)
{
inf->count = inf->maxcount = 0;
inf->elemsize = elemsize;
inf->addelem = artn;
inf->lname = lname;
inf->l.ptr = NULL;
}
VARENT *
find_varentry(VAR *v)
{
struct varent *vent;
for (vent = vhead; vent; vent = vent->next) {
if (strcmp(vent->var->name, v->name) == 0)
return vent;
}
return NULL;
}
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(vent->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)
{
const KINFO *ka, *kb;
double cpua, cpub;
segsz_t sizea, sizeb;
ka = a;
kb = b;
/* SORTCPU and SORTMEM are sorted in descending order. */
if (sortby == SORTCPU) {
cpua = getpcpu(ka);
cpub = getpcpu(kb);
if (cpua < cpub)
return (1);
if (cpua > cpub)
return (-1);
}
if (sortby == SORTMEM) {
sizea = ka->ki_p->ki_tsize + ka->ki_p->ki_dsize +
ka->ki_p->ki_ssize;
sizeb = kb->ki_p->ki_tsize + kb->ki_p->ki_dsize +
kb->ki_p->ki_ssize;
if (sizea < sizeb)
return (1);
if (sizea > sizeb)
return (-1);
}
/*
* TTY's are sorted in ascending order, except that all NODEV
* processes come before all processes with a device.
*/
if (ka->ki_p->ki_tdev == NODEV && kb->ki_p->ki_tdev != NODEV)
return (-1);
if (ka->ki_p->ki_tdev != NODEV && kb->ki_p->ki_tdev == NODEV)
return (1);
if (ka->ki_p->ki_tdev < kb->ki_p->ki_tdev)
return (-1);
if (ka->ki_p->ki_tdev > kb->ki_p->ki_tdev)
return (1);
/* PID's are sorted in ascending order. */
if (ka->ki_p->ki_pid < kb->ki_p->ki_pid)
return (-1);
if (ka->ki_p->ki_pid > kb->ki_p->ki_pid)
return (1);
return (0);
}
/*
* 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)
{
int have_fmt;
size_t len;
char *newopts, *ns, *cp;
/*
* If we have an 'o' option, then note it, since we don't want to do
* some types of munging.
*/
have_fmt = index(s, 'o') != NULL;
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') && !have_fmt)
*ns++ = 'p';
(void)strcpy(ns, cp); /* and append the number */
return (newopts);
}
static void
usage(void)
{
#define SINGLE_OPTS "[-aC" OPT_LAZY_f "HhjlmrSTuvwXxZ]"
(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: ps " SINGLE_OPTS " [-G gid[,gid]] [-O|o fmt]",
" [-p pid[,pid]] [-t tty[,tty]] [-U user[,user]]",
" [-M core] [-N system]",
" ps [-L]");
exit(1);
}
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