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661 lines
15 KiB
C
661 lines
15 KiB
C
/* $NetBSD: pkill.c,v 1.8 2005/03/02 15:31:44 abs Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/user.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <limits.h>
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#include <paths.h>
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#include <string.h>
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#include <unistd.h>
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#include <signal.h>
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#include <regex.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <err.h>
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#include <pwd.h>
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#include <grp.h>
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#include <errno.h>
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#include <locale.h>
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#define STATUS_MATCH 0
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#define STATUS_NOMATCH 1
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#define STATUS_BADUSAGE 2
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#define STATUS_ERROR 3
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#define MIN_PID 5
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#define MAX_PID 99999
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/* Ignore system-processes (if '-S' flag is not specified) and myself. */
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#define PSKIP(kp) ((kp)->ki_pid == mypid || \
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(!kthreads && ((kp)->ki_flag & P_KTHREAD) != 0))
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enum listtype {
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LT_GENERIC,
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LT_USER,
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LT_GROUP,
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LT_TTY,
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LT_PGRP,
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LT_SID
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};
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struct list {
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SLIST_ENTRY(list) li_chain;
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long li_number;
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};
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SLIST_HEAD(listhead, list);
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struct kinfo_proc *plist;
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char *selected;
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const char *delim = "\n";
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int nproc;
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int pgrep;
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int signum = SIGTERM;
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int newest;
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int oldest;
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int inverse;
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int longfmt;
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int matchargs;
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int fullmatch;
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int kthreads;
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int cflags = REG_EXTENDED;
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kvm_t *kd;
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pid_t mypid;
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struct listhead euidlist = SLIST_HEAD_INITIALIZER(list);
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struct listhead ruidlist = SLIST_HEAD_INITIALIZER(list);
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struct listhead rgidlist = SLIST_HEAD_INITIALIZER(list);
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struct listhead pgrplist = SLIST_HEAD_INITIALIZER(list);
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struct listhead ppidlist = SLIST_HEAD_INITIALIZER(list);
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struct listhead tdevlist = SLIST_HEAD_INITIALIZER(list);
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struct listhead sidlist = SLIST_HEAD_INITIALIZER(list);
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struct listhead jidlist = SLIST_HEAD_INITIALIZER(list);
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int main(int, char **);
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void usage(void);
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void killact(struct kinfo_proc *);
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void grepact(struct kinfo_proc *);
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void makelist(struct listhead *, enum listtype, char *);
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int takepid(const char *);
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int
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main(int argc, char **argv)
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{
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extern char *optarg;
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extern int optind;
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char buf[_POSIX2_LINE_MAX], *mstr, **pargv, *p, *q;
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const char *execf, *coref;
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int debug_opt;
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int i, ch, bestidx, rv, criteria, pidfromfile;
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size_t jsz;
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void (*action)(struct kinfo_proc *);
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struct kinfo_proc *kp;
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struct list *li;
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struct timeval best_tval;
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regex_t reg;
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regmatch_t regmatch;
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setlocale(LC_ALL, "");
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if (strcmp(getprogname(), "pgrep") == 0) {
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action = grepact;
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pgrep = 1;
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} else {
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action = killact;
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p = argv[1];
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if (argc > 1 && p[0] == '-') {
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p++;
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i = (int)strtol(p, &q, 10);
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if (*q == '\0') {
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signum = i;
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argv++;
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argc--;
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} else {
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if (strncasecmp(p, "sig", 3) == 0)
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p += 3;
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for (i = 1; i < NSIG; i++)
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if (strcasecmp(sys_signame[i], p) == 0)
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break;
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if (i != NSIG) {
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signum = i;
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argv++;
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argc--;
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}
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}
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}
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}
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criteria = 0;
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debug_opt = 0;
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pidfromfile = -1;
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execf = coref = _PATH_DEVNULL;
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while ((ch = getopt(argc, argv, "DF:G:M:N:P:SU:d:fg:ij:lnos:t:u:vx")) != -1)
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switch (ch) {
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case 'D':
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debug_opt++;
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break;
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case 'F':
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pidfromfile = takepid(optarg);
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criteria = 1;
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break;
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case 'G':
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makelist(&rgidlist, LT_GROUP, optarg);
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criteria = 1;
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break;
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case 'M':
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coref = optarg;
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break;
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case 'N':
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execf = optarg;
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break;
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case 'P':
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makelist(&ppidlist, LT_GENERIC, optarg);
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criteria = 1;
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break;
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case 'S':
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if (!pgrep)
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usage();
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kthreads = 1;
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break;
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case 'U':
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makelist(&ruidlist, LT_USER, optarg);
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criteria = 1;
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break;
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case 'd':
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if (!pgrep)
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usage();
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delim = optarg;
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break;
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case 'f':
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matchargs = 1;
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break;
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case 'g':
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makelist(&pgrplist, LT_PGRP, optarg);
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criteria = 1;
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break;
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case 'i':
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cflags |= REG_ICASE;
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break;
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case 'j':
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makelist(&jidlist, LT_GENERIC, optarg);
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criteria = 1;
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break;
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case 'l':
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if (!pgrep)
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usage();
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longfmt = 1;
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break;
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case 'n':
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newest = 1;
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criteria = 1;
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break;
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case 'o':
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oldest = 1;
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criteria = 1;
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break;
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case 's':
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makelist(&sidlist, LT_SID, optarg);
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criteria = 1;
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break;
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case 't':
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makelist(&tdevlist, LT_TTY, optarg);
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criteria = 1;
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break;
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case 'u':
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makelist(&euidlist, LT_USER, optarg);
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criteria = 1;
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break;
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case 'v':
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inverse = 1;
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break;
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case 'x':
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fullmatch = 1;
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break;
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default:
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usage();
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/* NOTREACHED */
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}
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argc -= optind;
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argv += optind;
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if (argc != 0)
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criteria = 1;
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if (!criteria)
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usage();
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if (newest && oldest)
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errx(STATUS_ERROR, "-n and -o are mutually exclusive");
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mypid = getpid();
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/*
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* Retrieve the list of running processes from the kernel.
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*/
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kd = kvm_openfiles(execf, coref, NULL, O_RDONLY, buf);
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if (kd == NULL)
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errx(STATUS_ERROR, "kvm_openfiles(): %s", buf);
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/*
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* Use KERN_PROC_PROC instead of KERN_PROC_ALL, since we
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* just want processes and not individual kernel threads.
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*/
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plist = kvm_getprocs(kd, KERN_PROC_PROC, 0, &nproc);
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if (plist == NULL)
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errx(STATUS_ERROR, "kvm_getprocs() failed");
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/*
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* Allocate memory which will be used to keep track of the
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* selection.
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*/
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if ((selected = malloc(nproc)) == NULL)
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errx(STATUS_ERROR, "memory allocation failure");
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memset(selected, 0, nproc);
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/*
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* Refine the selection.
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*/
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for (; *argv != NULL; argv++) {
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if ((rv = regcomp(®, *argv, cflags)) != 0) {
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regerror(rv, ®, buf, sizeof(buf));
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errx(STATUS_BADUSAGE, "bad expression: %s", buf);
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}
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for (i = 0, kp = plist; i < nproc; i++, kp++) {
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if (PSKIP(kp)) {
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if (debug_opt > 0)
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fprintf(stderr, "* Skipped %5d %3d %s\n",
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kp->ki_pid, kp->ki_uid, kp->ki_comm);
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continue;
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}
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if (matchargs &&
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(pargv = kvm_getargv(kd, kp, 0)) != NULL) {
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jsz = 0;
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while (jsz < sizeof(buf) && *pargv != NULL) {
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jsz += snprintf(buf + jsz,
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sizeof(buf) - jsz,
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pargv[1] != NULL ? "%s " : "%s",
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pargv[0]);
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pargv++;
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}
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mstr = buf;
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} else
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mstr = kp->ki_comm;
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rv = regexec(®, mstr, 1, ®match, 0);
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if (rv == 0) {
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if (fullmatch) {
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if (regmatch.rm_so == 0 &&
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regmatch.rm_eo ==
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(off_t)strlen(mstr))
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selected[i] = 1;
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} else
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selected[i] = 1;
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} else if (rv != REG_NOMATCH) {
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regerror(rv, ®, buf, sizeof(buf));
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errx(STATUS_ERROR, "regexec(): %s", buf);
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}
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if (debug_opt > 1) {
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const char *rv_res = "NoMatch";
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if (selected[i])
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rv_res = "Matched";
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fprintf(stderr, "* %s %5d %3d %s\n", rv_res,
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kp->ki_pid, kp->ki_uid, mstr);
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}
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}
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regfree(®);
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}
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for (i = 0, kp = plist; i < nproc; i++, kp++) {
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if (PSKIP(kp))
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continue;
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if (pidfromfile >= 0 && kp->ki_pid != pidfromfile) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &ruidlist, li_chain)
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if (kp->ki_ruid == (uid_t)li->li_number)
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break;
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if (SLIST_FIRST(&ruidlist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &rgidlist, li_chain)
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if (kp->ki_rgid == (gid_t)li->li_number)
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break;
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if (SLIST_FIRST(&rgidlist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &euidlist, li_chain)
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if (kp->ki_uid == (uid_t)li->li_number)
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break;
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if (SLIST_FIRST(&euidlist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &ppidlist, li_chain)
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if (kp->ki_ppid == (pid_t)li->li_number)
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break;
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if (SLIST_FIRST(&ppidlist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &pgrplist, li_chain)
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if (kp->ki_pgid == (pid_t)li->li_number)
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break;
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if (SLIST_FIRST(&pgrplist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &tdevlist, li_chain) {
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if (li->li_number == -1 &&
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(kp->ki_flag & P_CONTROLT) == 0)
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break;
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if (kp->ki_tdev == (dev_t)li->li_number)
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break;
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}
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if (SLIST_FIRST(&tdevlist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &sidlist, li_chain)
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if (kp->ki_sid == (pid_t)li->li_number)
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break;
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if (SLIST_FIRST(&sidlist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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SLIST_FOREACH(li, &jidlist, li_chain) {
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if (kp->ki_jid > 0) {
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if (li->li_number == 0)
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break;
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if (kp->ki_jid == (int)li->li_number)
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break;
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}
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}
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if (SLIST_FIRST(&jidlist) != NULL && li == NULL) {
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selected[i] = 0;
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continue;
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}
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if (argc == 0)
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selected[i] = 1;
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}
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if (newest || oldest) {
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best_tval.tv_sec = 0;
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best_tval.tv_usec = 0;
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bestidx = -1;
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for (i = 0, kp = plist; i < nproc; i++, kp++) {
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if (!selected[i])
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continue;
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if (bestidx == -1) {
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/* The first entry of the list which matched. */
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;
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} else if (timercmp(&kp->ki_start, &best_tval, >)) {
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/* This entry is newer than previous "best". */
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if (oldest) /* but we want the oldest */
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continue;
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} else {
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/* This entry is older than previous "best". */
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if (newest) /* but we want the newest */
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continue;
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}
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/* This entry is better than previous "best" entry. */
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best_tval.tv_sec = kp->ki_start.tv_sec;
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best_tval.tv_usec = kp->ki_start.tv_usec;
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bestidx = i;
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}
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memset(selected, 0, nproc);
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if (bestidx != -1)
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selected[bestidx] = 1;
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}
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/*
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* Take the appropriate action for each matched process, if any.
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*/
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for (i = 0, rv = 0, kp = plist; i < nproc; i++, kp++) {
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if (PSKIP(kp))
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continue;
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if (selected[i]) {
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if (inverse)
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continue;
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} else if (!inverse)
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continue;
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rv = 1;
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(*action)(kp);
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}
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exit(rv ? STATUS_MATCH : STATUS_NOMATCH);
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}
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void
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usage(void)
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{
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const char *ustr;
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if (pgrep)
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ustr = "[-Sfilnovx] [-d delim]";
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else
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ustr = "[-signal] [-finovx]";
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fprintf(stderr,
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"usage: %s %s [-F pidfile] [-G gid] [-M core] [-N system]\n"
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" [-P ppid] [-U uid] [-g pgrp] [-j jid] [-s sid]\n"
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" [-t tty] [-u euid] pattern ...\n", getprogname(),
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ustr);
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exit(STATUS_ERROR);
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}
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void
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killact(struct kinfo_proc *kp)
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{
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if (kill(kp->ki_pid, signum) == -1)
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err(STATUS_ERROR, "signalling pid %d", (int)kp->ki_pid);
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}
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void
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grepact(struct kinfo_proc *kp)
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{
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char **argv;
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if (longfmt && matchargs &&
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(argv = kvm_getargv(kd, kp, 0)) != NULL) {
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printf("%d ", (int)kp->ki_pid);
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for (; *argv != NULL; argv++) {
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printf("%s", *argv);
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if (argv[1] != NULL)
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putchar(' ');
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}
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} else if (longfmt)
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printf("%d %s", (int)kp->ki_pid, kp->ki_comm);
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else
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printf("%d", (int)kp->ki_pid);
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|
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;
|
|
const char *cp;
|
|
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'",
|
|
sp);
|
|
li->li_number = pw->pw_uid;
|
|
break;
|
|
case LT_GROUP:
|
|
if ((gr = getgrnam(sp)) == NULL)
|
|
errx(STATUS_BADUSAGE, "unknown group `%s'",
|
|
sp);
|
|
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)
|
|
cp = "console";
|
|
else if (strncmp(sp, "tty", 3) == 0)
|
|
cp = sp;
|
|
else
|
|
cp = NULL;
|
|
|
|
if (cp == NULL)
|
|
snprintf(buf, sizeof(buf), "/dev/tty%s", sp);
|
|
else
|
|
snprintf(buf, sizeof(buf), "/dev/%s", cp);
|
|
|
|
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();
|
|
}
|
|
|
|
int
|
|
takepid(const char *pidfile)
|
|
{
|
|
char *endp, line[BUFSIZ];
|
|
FILE *fh;
|
|
long rval;
|
|
|
|
fh = fopen(pidfile, "r");
|
|
if (fh == NULL)
|
|
err(STATUS_ERROR, "can't open pid file `%s'", pidfile);
|
|
|
|
if (fgets(line, sizeof(line), fh) == NULL) {
|
|
if (feof(fh)) {
|
|
(void)fclose(fh);
|
|
errx(STATUS_ERROR, "pid file `%s' is empty", pidfile);
|
|
}
|
|
(void)fclose(fh);
|
|
err(STATUS_ERROR, "can't read from pid file `%s'", pidfile);
|
|
}
|
|
(void)fclose(fh);
|
|
|
|
rval = strtol(line, &endp, 10);
|
|
if (*endp != '\0' && !isspace((unsigned char)*endp))
|
|
errx(STATUS_ERROR, "invalid pid in file `%s'", pidfile);
|
|
else if (rval < MIN_PID || rval > MAX_PID)
|
|
errx(STATUS_ERROR, "invalid pid in file `%s'", pidfile);
|
|
return (rval);
|
|
}
|