killall.c revision 76678
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 76678 2001-05-16 11:13:16Z phk $ 2865123Speter */ 2965123Speter 3065177Speter#include <sys/cdefs.h> 3165123Speter#include <sys/param.h> 3276169Smarkm#include <sys/lock.h> 3365123Speter#include <sys/stat.h> 3465123Speter#include <sys/user.h> 3565123Speter#include <sys/sysctl.h> 3665123Speter#include <fcntl.h> 3765123Speter#include <dirent.h> 3865123Speter#include <stdio.h> 3965123Speter#include <stdlib.h> 4065123Speter#include <string.h> 4165123Speter#include <pwd.h> 4265123Speter#include <signal.h> 4365123Speter#include <regex.h> 4465123Speter#include <ctype.h> 4565123Speter#include <err.h> 4665123Speter#include <errno.h> 4765123Speter#include <unistd.h> 4865123Speter 4965123Speterstatic char *prog; 5065123Speter 5165177Speterstatic void __dead2 5265123Speterusage(void) 5365123Speter{ 5465123Speter 5565123Speter fprintf(stderr, "usage: %s [-l] [-v] [-m] [-sig] [-u user] [-t tty] [-c cmd] [cmd]...\n", prog); 5665123Speter fprintf(stderr, "At least one option or argument to specify processes must be given.\n"); 5765123Speter exit(1); 5865123Speter} 5965123Speter 6065123Speterstatic char * 6165123Speterupper(const char *str) 6265123Speter{ 6365123Speter static char buf[80]; 6465123Speter char *s; 6565123Speter 6665123Speter strncpy(buf, str, sizeof(buf)); 6765123Speter buf[sizeof(buf) - 1] = '\0'; 6865126Speter for (s = buf; *s; s++) 6965123Speter *s = toupper(*s); 7065123Speter return buf; 7165123Speter} 7265123Speter 7365123Speter 7465123Speterstatic void 7565123Speterprintsig(FILE *fp) 7665123Speter{ 7765123Speter const char *const * p; 7865123Speter int cnt; 7965123Speter int offset = 0; 8065123Speter 8165123Speter for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) { 8265123Speter offset += fprintf(fp, "%s ", upper(*p)); 8365123Speter if (offset >= 75 && cnt > 1) { 8465123Speter offset = 0; 8565123Speter fprintf(fp, "\n"); 8665123Speter } 8765123Speter } 8865123Speter fprintf(fp, "\n"); 8965123Speter} 9065123Speter 9165123Speterstatic void 9265123Speternosig(char *name) 9365123Speter{ 9465123Speter 9565123Speter warnx("unknown signal %s; valid signals:", name); 9665123Speter printsig(stderr); 9765123Speter exit(1); 9865123Speter} 9965123Speter 10065123Speterint 10165123Spetermain(int ac, char **av) 10265123Speter{ 10365123Speter struct kinfo_proc *procs = NULL, *newprocs; 10465123Speter struct stat sb; 10565127Speter struct passwd *pw; 10665123Speter regex_t rgx; 10765123Speter regmatch_t pmatch; 10865123Speter int i, j; 10965123Speter char buf[256]; 11065123Speter char *user = NULL; 11165123Speter char *tty = NULL; 11265123Speter char *cmd = NULL; 11365123Speter int vflag = 0; 11465123Speter int sflag = 0; 11565123Speter int dflag = 0; 11665123Speter int mflag = 0; 11765123Speter uid_t uid = 0; 11865123Speter dev_t tdev = 0; 11965123Speter char thiscmd[MAXCOMLEN + 1]; 12065123Speter pid_t thispid; 12165123Speter uid_t thisuid; 12265123Speter dev_t thistdev; 12365123Speter int sig = SIGTERM; 12465127Speter const char *const *p; 12565123Speter char *ep; 12665123Speter int errors = 0; 12776678Sphk int mib[4]; 12865123Speter size_t miblen; 12965123Speter int st, nprocs; 13065123Speter size_t size; 13165123Speter int matched; 13265123Speter int killed = 0; 13365123Speter 13465123Speter prog = av[0]; 13565123Speter av++; 13665123Speter ac--; 13765123Speter 13865123Speter while (ac > 0) { 13965123Speter if (strcmp(*av, "-l") == 0) { 14065123Speter printsig(stdout); 14165123Speter exit(0); 14265123Speter } 14365177Speter if (strcmp(*av, "-help") == 0) 14465177Speter usage(); 14565123Speter if (**av == '-') { 14665123Speter ++*av; 14765123Speter switch (**av) { 14865123Speter case 'u': 14965123Speter ++*av; 15065123Speter if (**av == '\0') 15165123Speter ++av; 15265123Speter --ac; 15365123Speter user = *av; 15465123Speter break; 15565123Speter case 't': 15665123Speter ++*av; 15765123Speter if (**av == '\0') 15865123Speter ++av; 15965123Speter --ac; 16065123Speter tty = *av; 16165123Speter break; 16265123Speter case 'c': 16365123Speter ++*av; 16465123Speter if (**av == '\0') 16565123Speter ++av; 16665123Speter --ac; 16765123Speter cmd = *av; 16865123Speter break; 16965123Speter case 'v': 17065123Speter vflag++; 17165123Speter break; 17265123Speter case 's': 17365123Speter sflag++; 17465123Speter break; 17565123Speter case 'd': 17665123Speter dflag++; 17765123Speter break; 17865123Speter case 'm': 17965123Speter mflag++; 18065123Speter break; 18165123Speter default: 18265123Speter if (isalpha(**av)) { 18365123Speter if (strncasecmp(*av, "sig", 3) == 0) 18465123Speter *av += 3; 18565123Speter for (sig = NSIG, p = sys_signame + 1; 18665123Speter --sig; ++p) 18765123Speter if (strcasecmp(*p, *av) == 0) { 18865123Speter sig = p - sys_signame; 18965123Speter break; 19065123Speter } 19165123Speter if (!sig) 19265123Speter nosig(*av); 19365123Speter } else if (isdigit(**av)) { 19465123Speter sig = strtol(*av, &ep, 10); 19565123Speter if (!*av || *ep) 19665123Speter errx(1, "illegal signal number: %s", *av); 19765123Speter if (sig < 0 || sig > NSIG) 19865123Speter nosig(*av); 19965123Speter } else 20065123Speter nosig(*av); 20165123Speter } 20265123Speter ++av; 20365123Speter --ac; 20465123Speter } else { 20565123Speter break; 20665123Speter } 20765123Speter } 20865123Speter 20965123Speter if (user == NULL && tty == NULL && cmd == NULL && ac == 0) 21065123Speter usage(); 21165123Speter 21265123Speter if (tty) { 21365123Speter if (strncmp(tty, "/dev/", 5) == 0) 21465123Speter snprintf(buf, sizeof(buf), "%s", tty); 21565123Speter else if (strncmp(tty, "tty", 3) == 0) 21665123Speter snprintf(buf, sizeof(buf), "/dev/%s", tty); 21765123Speter else 21865123Speter snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 21965123Speter if (stat(buf, &sb) < 0) 22065123Speter err(1, "stat(%s)", buf); 22165123Speter if (!S_ISCHR(sb.st_mode)) 22265123Speter errx(1, "%s: not a character device", buf); 22365123Speter tdev = sb.st_rdev; 22465123Speter if (dflag) 22565123Speter printf("ttydev:0x%x\n", tdev); 22665123Speter } 22765123Speter if (user) { 22865123Speter pw = getpwnam(user); 22965123Speter if (pw == NULL) 23065123Speter errx(1, "user %s does not exist", user); 23165123Speter uid = pw->pw_uid; 23265123Speter if (dflag) 23365123Speter printf("uid:%d\n", uid); 23465123Speter } else { 23565123Speter uid = getuid(); 23665123Speter if (uid != 0) { 23765123Speter pw = getpwuid(uid); 23865123Speter if (pw) 23965123Speter user = pw->pw_name; 24065123Speter if (dflag) 24165123Speter printf("uid:%d\n", uid); 24265123Speter } 24365123Speter } 24465123Speter size = 0; 24565123Speter mib[0] = CTL_KERN; 24665123Speter mib[1] = KERN_PROC; 24765123Speter mib[2] = KERN_PROC_ALL; 24865123Speter mib[3] = 0; 24965123Speter miblen = 3; 25065123Speter 25165123Speter if (user && mib[2] == KERN_PROC_ALL) { 25270350Sps mib[2] = KERN_PROC_RUID; 25365123Speter mib[3] = uid; 25465123Speter miblen = 4; 25565123Speter } 25665123Speter if (tty && mib[2] == KERN_PROC_ALL) { 25765123Speter mib[2] = KERN_PROC_TTY; 25865123Speter mib[3] = tdev; 25965123Speter miblen = 4; 26065123Speter } 26165123Speter 26265123Speter st = sysctl(mib, miblen, NULL, &size, NULL, 0); 26365123Speter do { 26465123Speter size += size / 10; 26565123Speter newprocs = realloc(procs, size); 26665123Speter if (newprocs == 0) { 26765123Speter if (procs) 26865123Speter free(procs); 26965123Speter errx(1, "could not reallocate memory"); 27065123Speter } 27165123Speter procs = newprocs; 27265123Speter st = sysctl(mib, miblen, procs, &size, NULL, 0); 27365123Speter } while (st == -1 && errno == ENOMEM); 27465123Speter if (st == -1) 27565123Speter err(1, "could not sysctl(KERN_PROC)"); 27665123Speter if (size % sizeof(struct kinfo_proc) != 0) { 27765123Speter fprintf(stderr, "proc size mismatch (%d total, %d chunks)\n", 27865123Speter size, sizeof(struct kinfo_proc)); 27965123Speter fprintf(stderr, "userland out of sync with kernel, recompile libkvm etc\n"); 28065123Speter exit(1); 28165123Speter } 28265123Speter nprocs = size / sizeof(struct kinfo_proc); 28365123Speter if (dflag) 28465123Speter printf("nprocs %d\n", nprocs); 28565123Speter 28665123Speter for (i = 0; i < nprocs; i++) { 28769941Sjhb thispid = procs[i].ki_pid; 28869941Sjhb strncpy(thiscmd, procs[i].ki_comm, MAXCOMLEN); 28965123Speter thiscmd[MAXCOMLEN] = '\0'; 29069941Sjhb thistdev = procs[i].ki_tdev; 29169941Sjhb thisuid = procs[i].ki_ruid; /* real uid */ 29265123Speter 29365123Speter matched = 1; 29465123Speter if (user) { 29565123Speter if (thisuid != uid) 29665123Speter matched = 0; 29765123Speter } 29865123Speter if (tty) { 29965123Speter if (thistdev != tdev) 30065123Speter matched = 0; 30165123Speter } 30265123Speter if (cmd) { 30365123Speter if (mflag) { 30465123Speter if (regcomp(&rgx, cmd, 30565123Speter REG_EXTENDED|REG_NOSUB) != 0) { 30665123Speter mflag = 0; 30765123Speter warnx("%s: illegal regexp", cmd); 30865123Speter } 30965123Speter } 31065123Speter if (mflag) { 31165123Speter pmatch.rm_so = 0; 31265123Speter pmatch.rm_eo = strlen(thiscmd); 31365123Speter if (regexec(&rgx, thiscmd, 0, &pmatch, 31465123Speter REG_STARTEND) != 0) 31565123Speter matched = 0; 31665123Speter regfree(&rgx); 31765123Speter } else { 31872497Speter if (strncmp(thiscmd, cmd, MAXCOMLEN) != 0) 31965123Speter matched = 0; 32065123Speter } 32165123Speter } 32265123Speter if (matched == 0) 32365123Speter continue; 32471309Sache if (ac > 0) 32571309Sache matched = 0; 32665123Speter for (j = 0; j < ac; j++) { 32765123Speter if (mflag) { 32865123Speter if (regcomp(&rgx, av[j], 32965123Speter REG_EXTENDED|REG_NOSUB) != 0) { 33065123Speter mflag = 0; 33165123Speter warnx("%s: illegal regexp", av[j]); 33265123Speter } 33365123Speter } 33465123Speter if (mflag) { 33565123Speter pmatch.rm_so = 0; 33665123Speter pmatch.rm_eo = strlen(thiscmd); 33765123Speter if (regexec(&rgx, thiscmd, 0, &pmatch, 33865123Speter REG_STARTEND) == 0) 33965123Speter matched = 1; 34065123Speter regfree(&rgx); 34165123Speter } else { 34265123Speter if (strcmp(thiscmd, av[j]) == 0) 34365123Speter matched = 1; 34465123Speter } 34565123Speter if (matched) 34665123Speter break; 34765123Speter } 34865123Speter if (matched == 0) 34965123Speter continue; 35065123Speter if (dflag) 35165123Speter printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 35265123Speter thiscmd, thispid, thistdev, thisuid); 35365123Speter 35465123Speter if (vflag || sflag) 35565123Speter printf("kill -%s %d\n", upper(sys_signame[sig]), 35665123Speter thispid); 35765123Speter 35865123Speter killed++; 35965123Speter if (!dflag && !sflag) { 36065123Speter if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 36165125Speter warn("kill -%s %d", upper(sys_signame[sig]), 36265123Speter thispid); 36365123Speter errors = 1; 36465123Speter } 36565123Speter } 36665123Speter } 36765123Speter if (killed == 0) { 36865123Speter fprintf(stderr, "No matching processes %swere found\n", 36965123Speter getuid() != 0 ? "belonging to you " : ""); 37065123Speter errors = 1; 37165123Speter } 37265123Speter exit(errors); 37365123Speter} 374