killall.c revision 65126
165123Speter/*- 265123Speter * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org> 365123Speter * Copyright (c) 2000 Paul Saab <ps@FreeBSD.org> 465123Speter * All rights reserved. 565123Speter * 665123Speter * Redistribution and use in source and binary forms, with or without 765123Speter * modification, are permitted provided that the following conditions 865123Speter * are met: 965123Speter * 1. Redistributions of source code must retain the above copyright 1065123Speter * notice, this list of conditions and the following disclaimer. 1165123Speter * 2. Redistributions in binary form must reproduce the above copyright 1265123Speter * notice, this list of conditions and the following disclaimer in the 1365123Speter * documentation and/or other materials provided with the distribution. 1465123Speter * 1565123Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1665123Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1765123Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1865123Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1965123Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2065123Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2165123Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2265123Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2365123Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2465123Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2565123Speter * SUCH DAMAGE. 2665123Speter * 2765123Speter * $FreeBSD: head/usr.bin/killall/killall.c 65126 2000-08-27 01:17:11Z peter $ 2865123Speter */ 2965123Speter 3065123Speter#include <sys/param.h> 3165123Speter#include <sys/stat.h> 3265123Speter#include <sys/user.h> 3365123Speter#include <sys/sysctl.h> 3465123Speter#include <fcntl.h> 3565123Speter#include <dirent.h> 3665123Speter#include <stdio.h> 3765123Speter#include <stdlib.h> 3865123Speter#include <string.h> 3965123Speter#include <pwd.h> 4065123Speter#include <signal.h> 4165123Speter#include <regex.h> 4265123Speter#include <ctype.h> 4365123Speter#include <err.h> 4465123Speter#include <errno.h> 4565123Speter#include <unistd.h> 4665123Speter 4765123Speterstatic char *prog; 4865123Speter 4965123Speterstatic void 5065123Speterusage(void) 5165123Speter{ 5265123Speter 5365123Speter fprintf(stderr, "usage: %s [-l] [-v] [-m] [-sig] [-u user] [-t tty] [-c cmd] [cmd]...\n", prog); 5465123Speter fprintf(stderr, "At least one option or argument to specify processes must be given.\n"); 5565123Speter exit(1); 5665123Speter} 5765123Speter 5865123Speterstatic char * 5965123Speterupper(const char *str) 6065123Speter{ 6165123Speter static char buf[80]; 6265123Speter char *s; 6365123Speter 6465123Speter strncpy(buf, str, sizeof(buf)); 6565123Speter buf[sizeof(buf) - 1] = '\0'; 6665126Speter for (s = buf; *s; s++) 6765123Speter *s = toupper(*s); 6865123Speter return buf; 6965123Speter} 7065123Speter 7165123Speter 7265123Speterstatic void 7365123Speterprintsig(FILE *fp) 7465123Speter{ 7565123Speter const char *const * p; 7665123Speter int cnt; 7765123Speter int offset = 0; 7865123Speter 7965123Speter for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) { 8065123Speter offset += fprintf(fp, "%s ", upper(*p)); 8165123Speter if (offset >= 75 && cnt > 1) { 8265123Speter offset = 0; 8365123Speter fprintf(fp, "\n"); 8465123Speter } 8565123Speter } 8665123Speter fprintf(fp, "\n"); 8765123Speter} 8865123Speter 8965123Speterstatic void 9065123Speternosig(char *name) 9165123Speter{ 9265123Speter 9365123Speter warnx("unknown signal %s; valid signals:", name); 9465123Speter printsig(stderr); 9565123Speter exit(1); 9665123Speter} 9765123Speter 9865123Speterint 9965123Spetermain(int ac, char **av) 10065123Speter{ 10165123Speter struct kinfo_proc *procs = NULL, *newprocs; 10265123Speter struct stat sb; 10365123Speter struct passwd *pw; 10465123Speter regex_t rgx; 10565123Speter regmatch_t pmatch; 10665123Speter int i, j; 10765123Speter char buf[256]; 10865123Speter char *user = NULL; 10965123Speter char *tty = NULL; 11065123Speter char *cmd = NULL; 11165123Speter int vflag = 0; 11265123Speter int sflag = 0; 11365123Speter int dflag = 0; 11465123Speter int mflag = 0; 11565123Speter uid_t uid = 0; 11665123Speter dev_t tdev = 0; 11765123Speter char thiscmd[MAXCOMLEN + 1]; 11865123Speter pid_t thispid; 11965123Speter uid_t thisuid; 12065123Speter dev_t thistdev; 12165123Speter int sig = SIGTERM; 12265123Speter const char *const * p; 12365123Speter char *ep; 12465123Speter int errors = 0; 12565123Speter int mib[3]; 12665123Speter size_t miblen; 12765123Speter int st, nprocs; 12865123Speter size_t size; 12965123Speter int matched; 13065123Speter int killed = 0; 13165123Speter 13265123Speter prog = av[0]; 13365123Speter av++; 13465123Speter ac--; 13565123Speter 13665123Speter while (ac > 0) { 13765123Speter if (strcmp(*av, "-l") == 0) { 13865123Speter printsig(stdout); 13965123Speter exit(0); 14065123Speter } 14165123Speter if (**av == '-') { 14265123Speter ++*av; 14365123Speter switch (**av) { 14465123Speter case 'U': 14565123Speter case 'u': 14665123Speter ++*av; 14765123Speter if (**av == '\0') 14865123Speter ++av; 14965123Speter --ac; 15065123Speter user = *av; 15165123Speter break; 15265123Speter case 't': 15365123Speter ++*av; 15465123Speter if (**av == '\0') 15565123Speter ++av; 15665123Speter --ac; 15765123Speter tty = *av; 15865123Speter break; 15965123Speter case 'c': 16065123Speter ++*av; 16165123Speter if (**av == '\0') 16265123Speter ++av; 16365123Speter --ac; 16465123Speter cmd = *av; 16565123Speter break; 16665123Speter case 'v': 16765123Speter vflag++; 16865123Speter break; 16965123Speter case 's': 17065123Speter sflag++; 17165123Speter break; 17265123Speter case 'd': 17365123Speter dflag++; 17465123Speter break; 17565123Speter case 'm': 17665123Speter mflag++; 17765123Speter break; 17865123Speter default: 17965123Speter if (isalpha(**av)) { 18065123Speter if (strncasecmp(*av, "sig", 3) == 0) 18165123Speter *av += 3; 18265123Speter for (sig = NSIG, p = sys_signame + 1; 18365123Speter --sig; ++p) 18465123Speter if (strcasecmp(*p, *av) == 0) { 18565123Speter sig = p - sys_signame; 18665123Speter break; 18765123Speter } 18865123Speter if (!sig) 18965123Speter nosig(*av); 19065123Speter } else if (isdigit(**av)) { 19165123Speter sig = strtol(*av, &ep, 10); 19265123Speter if (!*av || *ep) 19365123Speter errx(1, "illegal signal number: %s", *av); 19465123Speter if (sig < 0 || sig > NSIG) 19565123Speter nosig(*av); 19665123Speter } else 19765123Speter nosig(*av); 19865123Speter } 19965123Speter ++av; 20065123Speter --ac; 20165123Speter } else { 20265123Speter break; 20365123Speter } 20465123Speter } 20565123Speter 20665123Speter if (user == NULL && tty == NULL && cmd == NULL && ac == 0) 20765123Speter usage(); 20865123Speter 20965123Speter if (tty) { 21065123Speter if (strncmp(tty, "/dev/", 5) == 0) 21165123Speter snprintf(buf, sizeof(buf), "%s", tty); 21265123Speter else if (strncmp(tty, "tty", 3) == 0) 21365123Speter snprintf(buf, sizeof(buf), "/dev/%s", tty); 21465123Speter else 21565123Speter snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 21665123Speter if (stat(buf, &sb) < 0) 21765123Speter err(1, "stat(%s)", buf); 21865123Speter if (!S_ISCHR(sb.st_mode)) 21965123Speter errx(1, "%s: not a character device", buf); 22065123Speter tdev = sb.st_rdev; 22165123Speter if (dflag) 22265123Speter printf("ttydev:0x%x\n", tdev); 22365123Speter } 22465123Speter if (user) { 22565123Speter pw = getpwnam(user); 22665123Speter if (pw == NULL) 22765123Speter errx(1, "user %s does not exist", user); 22865123Speter uid = pw->pw_uid; 22965123Speter if (dflag) 23065123Speter printf("uid:%d\n", uid); 23165123Speter } else { 23265123Speter uid = getuid(); 23365123Speter if (uid != 0) { 23465123Speter pw = getpwuid(uid); 23565123Speter if (pw) 23665123Speter user = pw->pw_name; 23765123Speter if (dflag) 23865123Speter printf("uid:%d\n", uid); 23965123Speter } 24065123Speter } 24165123Speter size = 0; 24265123Speter mib[0] = CTL_KERN; 24365123Speter mib[1] = KERN_PROC; 24465123Speter mib[2] = KERN_PROC_ALL; 24565123Speter mib[3] = 0; 24665123Speter miblen = 3; 24765123Speter 24865123Speter if (user && mib[2] == KERN_PROC_ALL) { 24965123Speter mib[2] = KERN_PROC_UID; 25065123Speter mib[3] = uid; 25165123Speter miblen = 4; 25265123Speter } 25365123Speter if (tty && mib[2] == KERN_PROC_ALL) { 25465123Speter mib[2] = KERN_PROC_TTY; 25565123Speter mib[3] = tdev; 25665123Speter miblen = 4; 25765123Speter } 25865123Speter 25965123Speter st = sysctl(mib, miblen, NULL, &size, NULL, 0); 26065123Speter do { 26165123Speter size += size / 10; 26265123Speter newprocs = realloc(procs, size); 26365123Speter if (newprocs == 0) { 26465123Speter if (procs) 26565123Speter free(procs); 26665123Speter errx(1, "could not reallocate memory"); 26765123Speter } 26865123Speter procs = newprocs; 26965123Speter st = sysctl(mib, miblen, procs, &size, NULL, 0); 27065123Speter } while (st == -1 && errno == ENOMEM); 27165123Speter if (st == -1) 27265123Speter err(1, "could not sysctl(KERN_PROC)"); 27365123Speter if (size % sizeof(struct kinfo_proc) != 0) { 27465123Speter fprintf(stderr, "proc size mismatch (%d total, %d chunks)\n", 27565123Speter size, sizeof(struct kinfo_proc)); 27665123Speter fprintf(stderr, "userland out of sync with kernel, recompile libkvm etc\n"); 27765123Speter exit(1); 27865123Speter } 27965123Speter nprocs = size / sizeof(struct kinfo_proc); 28065123Speter if (dflag) 28165123Speter printf("nprocs %d\n", nprocs); 28265123Speter 28365123Speter for (i = 0; i < nprocs; i++) { 28465123Speter thispid = procs[i].kp_proc.p_pid; 28565123Speter strncpy(thiscmd, procs[i].kp_proc.p_comm, MAXCOMLEN); 28665123Speter thiscmd[MAXCOMLEN] = '\0'; 28765123Speter thistdev = procs[i].kp_eproc.e_tdev; 28865123Speter thisuid = procs[i].kp_eproc.e_pcred.p_ruid; /* real uid */ 28965123Speter 29065123Speter matched = 1; 29165123Speter if (user) { 29265123Speter if (thisuid != uid) 29365123Speter matched = 0; 29465123Speter } 29565123Speter if (tty) { 29665123Speter if (thistdev != tdev) 29765123Speter matched = 0; 29865123Speter } 29965123Speter if (cmd) { 30065123Speter if (mflag) { 30165123Speter if (regcomp(&rgx, cmd, 30265123Speter REG_EXTENDED|REG_NOSUB) != 0) { 30365123Speter mflag = 0; 30465123Speter warnx("%s: illegal regexp", cmd); 30565123Speter } 30665123Speter } 30765123Speter if (mflag) { 30865123Speter pmatch.rm_so = 0; 30965123Speter pmatch.rm_eo = strlen(thiscmd); 31065123Speter if (regexec(&rgx, thiscmd, 0, &pmatch, 31165123Speter REG_STARTEND) != 0) 31265123Speter matched = 0; 31365123Speter regfree(&rgx); 31465123Speter } else { 31565123Speter if (strcmp(thiscmd, cmd) != 0) 31665123Speter matched = 0; 31765123Speter } 31865123Speter } 31965123Speter if (matched == 0) 32065123Speter continue; 32165123Speter matched = 0; 32265123Speter for (j = 0; j < ac; j++) { 32365123Speter if (mflag) { 32465123Speter if (regcomp(&rgx, av[j], 32565123Speter REG_EXTENDED|REG_NOSUB) != 0) { 32665123Speter mflag = 0; 32765123Speter warnx("%s: illegal regexp", av[j]); 32865123Speter } 32965123Speter } 33065123Speter if (mflag) { 33165123Speter pmatch.rm_so = 0; 33265123Speter pmatch.rm_eo = strlen(thiscmd); 33365123Speter if (regexec(&rgx, thiscmd, 0, &pmatch, 33465123Speter REG_STARTEND) == 0) 33565123Speter matched = 1; 33665123Speter regfree(&rgx); 33765123Speter } else { 33865123Speter if (strcmp(thiscmd, av[j]) == 0) 33965123Speter matched = 1; 34065123Speter } 34165123Speter if (matched) 34265123Speter break; 34365123Speter } 34465123Speter if (matched == 0) 34565123Speter continue; 34665123Speter if (dflag) 34765123Speter printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 34865123Speter thiscmd, thispid, thistdev, thisuid); 34965123Speter 35065123Speter if (vflag || sflag) 35165123Speter printf("kill -%s %d\n", upper(sys_signame[sig]), 35265123Speter thispid); 35365123Speter 35465123Speter killed++; 35565123Speter if (!dflag && !sflag) { 35665123Speter if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 35765125Speter warn("kill -%s %d", upper(sys_signame[sig]), 35865123Speter thispid); 35965123Speter errors = 1; 36065123Speter } 36165123Speter } 36265123Speter } 36365123Speter if (killed == 0) { 36465123Speter fprintf(stderr, "No matching processes %swere found\n", 36565123Speter getuid() != 0 ? "belonging to you " : ""); 36665123Speter errors = 1; 36765123Speter } 36865123Speter exit(errors); 36965123Speter} 370