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pgrep and pkill: search the process table for processes with a particular 

set of characteristics, and either print or signal the matching set. Mostly
compatible with the Solaris commands of the same name.
This commit is contained in:
ad 2002-03-01 11:21:58 +00:00
parent ba6fe47ae9
commit 3b8a0d4f4f
3 changed files with 729 additions and 0 deletions
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13
usr.bin/pkill/Makefile Normal file
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# $NetBSD: Makefile,v 1.1 2002/03/01 11:21:58 ad Exp $
PROG= pkill
SRCS= pkill.c
MAN= pkill.1
LDADD+= -lkvm
DPADD+= ${LIBKVM}
LINKS+= ${BINDIR}/pkill ${BINDIR}/pgrep
MLINKS+=pkill.1 pgrep.1
.include <bsd.prog.mk>

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.\" $NetBSD: pkill.1,v 1.1 2002/03/01 11:21:58 ad Exp $
.\"
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Andrew Doran.
.\"
.\" 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 NetBSD
.\" Foundation, Inc. and its contributors.
.\" 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
.\"
.Dd March 1, 2002
.Dt PKILL 1
.Os
.Sh NAME
.Nm pkill
.Nd find or signal processes by name
.Sh SYNOPSIS
.Nm pgrep
.Op Fl flnvx
.Op Fl G Ar gid
.Op Fl P Ar ppid
.Op Fl U Ar uid
.Op Fl d Ar delim
.Op Fl g Ar pgrp
.Op Fl s Ar sid
.Op Fl t Ar tty
.Op Fl u Ar euid
.Op Ar pattern Op ...
.Nm pkill
.Op Fl signal
.Op Fl fnvx
.Op Fl G Ar gid
.Op Fl P Ar ppid
.Op Fl U Ar uid
.Op Fl g Ar pgrp
.Op Fl s Ar sid
.Op Fl t Ar tty
.Op Fl u Ar euid
.Op Ar pattern Op ...
.Sh DESCRIPTION
The
.Nm pgrep
command searches the process table on the running system and prints the
process IDs of all processes that match the criteria given on the command
line.
.Pp
The
.Nm pkill
command searches the process table on the running system and signals all
processes that match the criteria given on the command line.
.Pp
The following options are available:
.Bl -tag -width binladen
.It Fl G Ar gid
Restrict matches to processes with a real group ID in the comma-seperated
list
.Ar gid .
.It Fl P Ar ppid
Restrict matches to processes with a parent process ID in the
comma-seperated list
.Ar ppid .
.It Fl U Ar uid
Restrict matches to processes with a real user ID in the comma-seperated
list
.Ar uid .
.It Fl d Ar delim
Specify a delimiter to be printed between each process ID.
The default is a newline.
This option can only be used with the
.Nm pgrep
command.
.It Fl f
Match against full argument lists.
The default is to match against process names.
.It Fl g Ar pgrp
Restrict matches to processes with a process group ID in the comma-seperated
list
.Ar pgrp .
The value zero is taken to mean the process group ID of the running
.Nm pgrep
or
.Nm pkill
command.
.It Fl l
Long output.
Print the process name in addition to the process ID for each matching
process.
If used in conjunction with
.Fl f ,
print the process ID and the full argument list for each matching process.
This option can only be used with the
.Nm pgrep
command.
.It Fl n
Match only the most recently created process, if any.
.It Fl s Ar sid
Restrict matches to processes with a session ID in the comma-seperated
list
.Ar sid .
The value zero is taken to mean the session ID of the running
.Nm pgrep
or
.Nm pkill
command.
.It Fl t Ar tty
Restrict matches to processes associated with a terminal in the
comma-seperated list
.Ar tty .
Terminal names may be of the form `ttyxx' or the shortened form `xx'.
.It Fl u Ar euid
Restrict matches to processes with an effective user ID in the
comma-seperated list
.Ar euid .
.It Fl v
Reverse the sense of the matching; display processes that do not match the
given criteria.
.It Fl x
Require an exact match of the process name, or argument list if -f is given.
The default is to match any substring.
.It Fl signal
A non-negative decimal number or symbolic signal name specifying the signal
to be sent instead of the default TERM.
This option is valid only when given as the first argument to
.Nm pkill .
.El
.Pp
Note that a running
.Nm pgrep
or
.Nm pkill
process will never consider itself a potential match.
.Sh EXIT STATUS
.Nm pgrep
and
.Nm pkill
return one of the following values upon exit:
.Bl -tag -width foo
.It 0
One or more processes were matched.
.It 1
No processes were matched.
.It 2
Invalid options were specified on the command line.
.It 3
An internal error occurred.
.El
.Sh SEE ALSO
.Xr kill 1 ,
.Xr ps 1 ,
.Xr kill 2 ,
.Xr sigaction 2 ,
.Xr re_format 7 ,
.Xr signal 7
.Sh AUTHORS
.An Andrew Doran
.Aq ad@netbsd.org .

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/* $NetBSD: pkill.c,v 1.1 2002/03/01 11:21:58 ad Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
#ifndef LINT
__RCSID("$NetBSD: pkill.c,v 1.1 2002/03/01 11:21:58 ad Exp $");
#endif /* !LINT */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/proc.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <regex.h>
#include <ctype.h>
#include <kvm.h>
#include <err.h>
#include <pwd.h>
#include <grp.h>
#include <errno.h>
#define STATUS_MATCH 0
#define STATUS_NOMATCH 1
#define STATUS_BADUSAGE 2
#define STATUS_ERROR 3
enum listtype {
LT_GENERIC,
LT_USER,
LT_GROUP,
LT_TTY,
LT_PGRP,
LT_SID
};
struct list {
SLIST_ENTRY(list) li_chain;
long li_number;
};
SLIST_HEAD(listhead, list);
struct kinfo_proc2 *plist;
char *selected;
char *delim = "\n";
int nproc;
int pgrep;
int signum = SIGTERM;
int newest;
int inverse;
int longfmt;
int matchargs;
int fullmatch;
kvm_t *kd;
pid_t mypid;
struct listhead euidlist = SLIST_HEAD_INITIALIZER(list);
struct listhead ruidlist = SLIST_HEAD_INITIALIZER(list);
struct listhead rgidlist = SLIST_HEAD_INITIALIZER(list);
struct listhead pgrplist = SLIST_HEAD_INITIALIZER(list);
struct listhead ppidlist = SLIST_HEAD_INITIALIZER(list);
struct listhead tdevlist = SLIST_HEAD_INITIALIZER(list);
struct listhead sidlist = SLIST_HEAD_INITIALIZER(list);
int main(int, char **);
void usage(void);
void killact(struct kinfo_proc2 *);
void grepact(struct kinfo_proc2 *);
void makelist(struct listhead *, enum listtype, char *);
int
main(int argc, char **argv)
{
extern char *optarg;
extern int optind;
char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p;
int i, j, ch, bestidx, rv, criteria;
void (*action)(struct kinfo_proc2 *);
struct kinfo_proc2 *kp;
struct list *li;
u_int32_t bestsec, bestusec;
regex_t reg;
regmatch_t regmatch;
if (strcmp(getprogname(), "pgrep") == 0) {
action = grepact;
pgrep = 1;
} else {
action = killact;
p = argv[1];
if (p[0] == '-') {
p++;
i = (int)strtol(p, &p, 10);
if (*p == '\0') {
signum = i;
argv++;
} else {
if (strncasecmp(p, "sig", 3) == 0)
p += 3;
for (i = 1; i < NSIG; i++)
if (strcasecmp(sys_signame[i], p) == 0)
break;
if (i != NSIG) {
signum = i;
argv++;
}
}
}
}
criteria = 0;
while ((ch = getopt(argc, argv, "G:P:U:d:fg:lns:t:vx")) != -1)
switch (ch) {
case 'G':
makelist(&rgidlist, LT_GROUP, optarg);
criteria = 1;
break;
case 'P':
makelist(&ppidlist, LT_GENERIC, optarg);
criteria = 1;
break;
case 'U':
makelist(&ruidlist, LT_USER, optarg);
criteria = 1;
break;
case 'd':
if (!pgrep)
usage();
delim = optarg;
break;
case 'f':
matchargs = 1;
break;
case 'g':
makelist(&pgrplist, LT_PGRP, optarg);
criteria = 1;
break;
case 'l':
if (!pgrep)
usage();
longfmt = 1;
break;
case 'n':
newest = 1;
criteria = 1;
break;
case 's':
makelist(&sidlist, LT_SID, optarg);
criteria = 1;
break;
case 't':
makelist(&tdevlist, LT_TTY, optarg);
criteria = 1;
break;
case 'u':
makelist(&euidlist, LT_USER, optarg);
criteria = 1;
break;
case 'v':
inverse = 1;
break;
case 'x':
fullmatch = 1;
break;
default:
usage();
/* NOTREACHED */
}
argc -= optind;
argv += optind;
if (argc != 0)
criteria = 1;
if (!criteria)
usage();
mypid = getpid();
/*
* Retrieve the list of running processes from the kernel.
*/
kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, buf);
if (kd == NULL)
errx(STATUS_ERROR, "kvm_openfiles(): %s", buf);
plist = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(*plist), &nproc);
if (plist == NULL)
errx(STATUS_ERROR, "kvm_getprocs2() failed");
/*
* Allocate memory which will be used to keep track of the
* selection.
*/
if ((selected = malloc(nproc)) == NULL)
errx(STATUS_ERROR, "memory allocation failure");
memset(selected, 0, nproc);
/*
* Refine the selection.
*/
for (; *argv != NULL; argv++) {
if ((rv = regcomp(&reg, *argv, REG_EXTENDED)) != 0) {
regerror(rv, &reg, buf, sizeof(buf));
errx(STATUS_BADUSAGE, "bad expression: %s", buf);
}
for (i = 0, kp = plist; i < nproc; i++, kp++) {
if ((kp->p_flag & P_SYSTEM) != 0)
continue;
if (matchargs) {
if ((pargv = kvm_getargv2(kd, kp, 0)) == NULL)
continue;
j = 0;
while (j < sizeof(buf) && *pargv != NULL) {
j += snprintf(buf + j, sizeof(buf) - j,
pargv[1] != NULL ? "%s " : "%s",
pargv[0]);
pargv++;
}
mstr = buf;
} else
mstr = kp->p_comm;
rv = regexec(&reg, mstr, 1, &regmatch, 0);
if (rv == 0) {
if (fullmatch) {
if (regmatch.rm_so == 0 &&
regmatch.rm_eo == strlen(mstr))
selected[i] = 1;
} else
selected[i] = 1;
} else if (rv != REG_NOMATCH) {
regerror(rv, &reg, buf, sizeof(buf));
errx(STATUS_ERROR, "regexec(): %s", buf);
}
}
regfree(&reg);
}
for (i = 0, kp = plist; i < nproc; i++, kp++) {
if ((kp->p_flag & P_SYSTEM) != 0)
continue;
SLIST_FOREACH(li, &ruidlist, li_chain)
if (kp->p_ruid == (uid_t)li->li_number)
break;
if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
selected[i] = 0;
continue;
}
SLIST_FOREACH(li, &rgidlist, li_chain)
if (kp->p_rgid == (gid_t)li->li_number)
break;
if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
selected[i] = 0;
continue;
}
SLIST_FOREACH(li, &euidlist, li_chain)
if (kp->p_uid == (uid_t)li->li_number)
break;
if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
selected[i] = 0;
continue;
}
SLIST_FOREACH(li, &ppidlist, li_chain)
if (kp->p_ppid == (uid_t)li->li_number)
break;
if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
selected[i] = 0;
continue;
}
SLIST_FOREACH(li, &pgrplist, li_chain)
if (kp->p__pgid == (uid_t)li->li_number)
break;
if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
selected[i] = 0;
continue;
}
SLIST_FOREACH(li, &tdevlist, li_chain) {
if (li->li_number == -1 &&
(kp->p_flag & P_CONTROLT) == 0)
break;
if (kp->p_tdev == (uid_t)li->li_number)
break;
}
if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
selected[i] = 0;
continue;
}
SLIST_FOREACH(li, &sidlist, li_chain)
if (kp->p_sid == (uid_t)li->li_number)
break;
if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
selected[i] = 0;
continue;
}
if (argc == 0)
selected[i] = 1;
}
if (newest) {
bestsec = 0;
bestusec = 0;
bestidx = -1;
for (i = 0, kp = plist; i < nproc; i++, kp++) {
if (!selected[i])
continue;
if (kp->p_ustart_sec > bestsec ||
(kp->p_ustart_sec == bestsec
&& kp->p_ustart_usec > bestusec)) {
bestsec = kp->p_ustart_sec;
bestusec = kp->p_ustart_usec;
bestidx = i;
}
}
memset(selected, 0, nproc);
if (bestidx != -1)
selected[bestidx] = 1;
}
/*
* Take the appropriate action for each matched process, if any.
*/
for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
if (kp->p_pid == mypid)
continue;
if (selected[i]) {
if (inverse)
continue;
} else if (!inverse)
continue;
rv = 1;
(*action)(kp);
}
exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
}
void
usage(void)
{
const char *ustr;
if (pgrep)
ustr = "[-flnvx] [-d delim]";
else
ustr = "[-signal] [-fnvx]";
fprintf(stderr, "usage: %s %s [-G gid] [-P ppid] [-U uid] [-g pgrp] "
"[-s sid] [-t tty] [-u euid] pattern ...\n", getprogname(), ustr);
exit(STATUS_ERROR);
}
void
killact(struct kinfo_proc2 *kp)
{
if (kill(kp->p_pid, signum) == -1)
err(STATUS_ERROR, "signalling pid %d", (int)kp->p_pid);
}
void
grepact(struct kinfo_proc2 *kp)
{
char **argv;
if (longfmt && matchargs) {
if ((argv = kvm_getargv2(kd, kp, 0)) == NULL)
return;
printf("%d ", (int)kp->p_pid);
for (; *argv != NULL; argv++) {
printf("%s", *argv);
if (argv[1] != NULL)
putchar(' ');
}
} else if (longfmt)
printf("%d %s", (int)kp->p_pid, kp->p_comm);
else
printf("%d", (int)kp->p_pid);
printf("%s", delim);
}
void
makelist(struct listhead *head, enum listtype type, char *src)
{
struct list *li;
struct passwd *pw;
struct group *gr;
struct stat st;
char *sp, *p, buf[MAXPATHLEN];
int empty;
empty = 1;
while ((sp = strsep(&src, ",")) != NULL) {
if (*sp == '\0')
usage();
if ((li = malloc(sizeof(*li))) == NULL)
errx(STATUS_ERROR, "memory allocation failure");
SLIST_INSERT_HEAD(head, li, li_chain);
empty = 0;
li->li_number = (uid_t)strtol(sp, &p, 0);
if (*p == '\0') {
switch (type) {
case LT_PGRP:
if (li->li_number == 0)
li->li_number = getpgrp();
break;
case LT_SID:
if (li->li_number == 0)
li->li_number = getsid(mypid);
break;
case LT_TTY:
usage();
default:
break;
}
continue;
}
switch (type) {
case LT_USER:
if ((pw = getpwnam(sp)) == NULL)
errx(STATUS_BADUSAGE, "unknown user `%s'",
optarg);
li->li_number = pw->pw_uid;
break;
case LT_GROUP:
if ((gr = getgrnam(sp)) == NULL)
errx(STATUS_BADUSAGE, "unknown group `%s'",
optarg);
li->li_number = gr->gr_gid;
break;
case LT_TTY:
if (strcmp(sp, "-") == 0) {
li->li_number = -1;
break;
} else if (strcmp(sp, "co") == 0)
p = "console";
else if (strncmp(sp, "tty", 3) == 0)
p = sp;
else
p = NULL;
if (p == NULL)
snprintf(buf, sizeof(buf), "/dev/tty%s", sp);
else
snprintf(buf, sizeof(buf), "/dev/%s", p);
if (stat(buf, &st) < 0) {
if (errno == ENOENT)
errx(STATUS_BADUSAGE,
"no such tty: `%s'", sp);
err(STATUS_ERROR, "stat(%s)", sp);
}
if ((st.st_mode & S_IFCHR) == 0)
errx(STATUS_BADUSAGE, "not a tty: `%s'", sp);
li->li_number = st.st_rdev;
break;
default:
usage();
};
}
if (empty)
usage();
}