killall.c revision 237847
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 2865177Speter#include <sys/cdefs.h> 2999112Sobrien__FBSDID("$FreeBSD: head/usr.bin/killall/killall.c 237847 2012-06-30 16:36:22Z kib $"); 3099112Sobrien 3165123Speter#include <sys/param.h> 32113277Smike#include <sys/jail.h> 3365123Speter#include <sys/stat.h> 34192896Sjamie#include <sys/uio.h> 3565123Speter#include <sys/user.h> 3665123Speter#include <sys/sysctl.h> 37200462Sdelphij#include <fcntl.h> 38200462Sdelphij#include <dirent.h> 39194869Sjamie#include <jail.h> 4065123Speter#include <stdio.h> 4165123Speter#include <stdlib.h> 4265123Speter#include <string.h> 4365123Speter#include <pwd.h> 4465123Speter#include <signal.h> 4565123Speter#include <regex.h> 4665123Speter#include <ctype.h> 4765123Speter#include <err.h> 4865123Speter#include <errno.h> 4965123Speter#include <unistd.h> 50132191Stjr#include <locale.h> 5165123Speter 5265177Speterstatic void __dead2 5365123Speterusage(void) 5465123Speter{ 5565123Speter 56237618Sdelphij fprintf(stderr, "usage: killall [-delmsvz] [-help] [-I] [-j jail]\n"); 57113277Smike fprintf(stderr, 58124681Smaxim " [-u user] [-t tty] [-c cmd] [-SIGNAL] [cmd]...\n"); 5965123Speter fprintf(stderr, "At least one option or argument to specify processes must be given.\n"); 6065123Speter exit(1); 6165123Speter} 6265123Speter 6365123Speter 6465123Speterstatic void 6565123Speterprintsig(FILE *fp) 6665123Speter{ 6765123Speter const char *const * p; 6865123Speter int cnt; 6965123Speter int offset = 0; 7065123Speter 7165123Speter for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) { 72219347Sjilles offset += fprintf(fp, "%s ", *p); 7365123Speter if (offset >= 75 && cnt > 1) { 7465123Speter offset = 0; 7565123Speter fprintf(fp, "\n"); 7665123Speter } 7765123Speter } 7865123Speter fprintf(fp, "\n"); 7965123Speter} 8065123Speter 8165123Speterstatic void 8265123Speternosig(char *name) 8365123Speter{ 8465123Speter 8565123Speter warnx("unknown signal %s; valid signals:", name); 8665123Speter printsig(stderr); 8765123Speter exit(1); 8865123Speter} 8965123Speter 9065123Speterint 9165123Spetermain(int ac, char **av) 9265123Speter{ 93237844Skib struct kinfo_proc *procs, *newprocs; 9465123Speter struct stat sb; 9565127Speter struct passwd *pw; 9665123Speter regex_t rgx; 9765123Speter regmatch_t pmatch; 98237618Sdelphij int i, j, ch; 9965123Speter char buf[256]; 100237618Sdelphij char first; 10165123Speter char *user = NULL; 10265123Speter char *tty = NULL; 10365123Speter char *cmd = NULL; 10465123Speter int vflag = 0; 10565123Speter int sflag = 0; 10665123Speter int dflag = 0; 107125013Sdds int eflag = 0; 108237618Sdelphij int Iflag = 0; 109113277Smike int jflag = 0; 11065123Speter int mflag = 0; 11194689Sdes int zflag = 0; 11265123Speter uid_t uid = 0; 11365123Speter dev_t tdev = 0; 114124844Scperciva pid_t mypid; 11565123Speter char thiscmd[MAXCOMLEN + 1]; 11665123Speter pid_t thispid; 11765123Speter uid_t thisuid; 11865123Speter dev_t thistdev; 11965123Speter int sig = SIGTERM; 12065127Speter const char *const *p; 12165123Speter char *ep; 12265123Speter int errors = 0; 123113277Smike int jid; 12476678Sphk int mib[4]; 12565123Speter size_t miblen; 12665123Speter int st, nprocs; 12765123Speter size_t size; 12865123Speter int matched; 12965123Speter int killed = 0; 13065123Speter 131132191Stjr setlocale(LC_ALL, ""); 132132191Stjr 13365123Speter av++; 13465123Speter ac--; 13565123Speter 13665123Speter while (ac > 0) { 13765123Speter if (strcmp(*av, "-l") == 0) { 13865123Speter printsig(stdout); 13965123Speter exit(0); 14065123Speter } 14165177Speter if (strcmp(*av, "-help") == 0) 14265177Speter usage(); 14365123Speter if (**av == '-') { 14465123Speter ++*av; 14565123Speter switch (**av) { 146237618Sdelphij case 'I': 147237618Sdelphij Iflag = 1; 148237618Sdelphij break; 149113277Smike case 'j': 150113277Smike ++*av; 151173502Sru if (**av == '\0') { 152113277Smike ++av; 153173502Sru --ac; 154173502Sru } 155113277Smike jflag++; 156173502Sru if (*av == NULL) 157192896Sjamie errx(1, "must specify jail"); 158194869Sjamie jid = jail_getid(*av); 159194869Sjamie if (jid < 0) 160194869Sjamie errx(1, "%s", jail_errmsg); 161113277Smike if (jail_attach(jid) == -1) 162192896Sjamie err(1, "jail_attach(%d)", jid); 163113277Smike break; 16465123Speter case 'u': 16565123Speter ++*av; 166173502Sru if (**av == '\0') { 16765123Speter ++av; 168173502Sru --ac; 169173502Sru } 170173502Sru if (*av == NULL) 171173502Sru errx(1, "must specify user"); 17265123Speter user = *av; 17365123Speter break; 17465123Speter case 't': 17565123Speter ++*av; 176173502Sru if (**av == '\0') { 17765123Speter ++av; 178173502Sru --ac; 179173502Sru } 180173502Sru if (*av == NULL) 181173502Sru errx(1, "must specify tty"); 18265123Speter tty = *av; 18365123Speter break; 18465123Speter case 'c': 18565123Speter ++*av; 186173502Sru if (**av == '\0') { 18765123Speter ++av; 188173502Sru --ac; 189173502Sru } 190173502Sru if (*av == NULL) 191173502Sru errx(1, "must specify procname"); 19265123Speter cmd = *av; 19365123Speter break; 19465123Speter case 'v': 19565123Speter vflag++; 19665123Speter break; 19765123Speter case 's': 19865123Speter sflag++; 19965123Speter break; 20065123Speter case 'd': 20165123Speter dflag++; 20265123Speter break; 203125013Sdds case 'e': 204125013Sdds eflag++; 205125013Sdds break; 20665123Speter case 'm': 20765123Speter mflag++; 20865123Speter break; 20994689Sdes case 'z': 21094689Sdes zflag++; 21194689Sdes break; 21265123Speter default: 213132193Stjr if (isalpha((unsigned char)**av)) { 214218285Sjilles if (strncasecmp(*av, "SIG", 3) == 0) 21565123Speter *av += 3; 21665123Speter for (sig = NSIG, p = sys_signame + 1; 21765123Speter --sig; ++p) 21865123Speter if (strcasecmp(*p, *av) == 0) { 21965123Speter sig = p - sys_signame; 22065123Speter break; 22165123Speter } 22265123Speter if (!sig) 22365123Speter nosig(*av); 224132193Stjr } else if (isdigit((unsigned char)**av)) { 22565123Speter sig = strtol(*av, &ep, 10); 22665123Speter if (!*av || *ep) 22765123Speter errx(1, "illegal signal number: %s", *av); 228132851Smaxim if (sig < 0 || sig >= NSIG) 22965123Speter nosig(*av); 23065123Speter } else 23165123Speter nosig(*av); 23265123Speter } 23365123Speter ++av; 23465123Speter --ac; 23565123Speter } else { 23665123Speter break; 23765123Speter } 23865123Speter } 23965123Speter 240113277Smike if (user == NULL && tty == NULL && cmd == NULL && !jflag && ac == 0) 24165123Speter usage(); 24265123Speter 24365123Speter if (tty) { 24465123Speter if (strncmp(tty, "/dev/", 5) == 0) 24565123Speter snprintf(buf, sizeof(buf), "%s", tty); 24665123Speter else if (strncmp(tty, "tty", 3) == 0) 24765123Speter snprintf(buf, sizeof(buf), "/dev/%s", tty); 24865123Speter else 24965123Speter snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 25065123Speter if (stat(buf, &sb) < 0) 25165123Speter err(1, "stat(%s)", buf); 25265123Speter if (!S_ISCHR(sb.st_mode)) 25365123Speter errx(1, "%s: not a character device", buf); 25465123Speter tdev = sb.st_rdev; 25565123Speter if (dflag) 25665123Speter printf("ttydev:0x%x\n", tdev); 25765123Speter } 25865123Speter if (user) { 25978144Sobrien uid = strtol(user, &ep, 10); 26093432Sdwmalone if (*user == '\0' || *ep != '\0') { /* was it a number? */ 26178144Sobrien pw = getpwnam(user); 26278144Sobrien if (pw == NULL) 26378144Sobrien errx(1, "user %s does not exist", user); 26478144Sobrien uid = pw->pw_uid; 26578144Sobrien if (dflag) 26678144Sobrien printf("uid:%d\n", uid); 26778144Sobrien } 26865123Speter } else { 26965123Speter uid = getuid(); 27065123Speter if (uid != 0) { 27165123Speter pw = getpwuid(uid); 27265123Speter if (pw) 27365123Speter user = pw->pw_name; 27465123Speter if (dflag) 27565123Speter printf("uid:%d\n", uid); 27665123Speter } 27765123Speter } 27865123Speter size = 0; 27965123Speter mib[0] = CTL_KERN; 28065123Speter mib[1] = KERN_PROC; 28165123Speter 282119834Stjr if (user) { 283125013Sdds mib[2] = eflag ? KERN_PROC_UID : KERN_PROC_RUID; 28465123Speter mib[3] = uid; 285120500Stjr miblen = 4; 286119834Stjr } else if (tty) { 28765123Speter mib[2] = KERN_PROC_TTY; 28865123Speter mib[3] = tdev; 289120500Stjr miblen = 4; 290237845Skib } else { 291237845Skib mib[2] = KERN_PROC_PROC; 292237845Skib mib[3] = 0; 293237845Skib miblen = 3; 29465123Speter } 29565123Speter 296237844Skib procs = NULL; 29765123Speter st = sysctl(mib, miblen, NULL, &size, NULL, 0); 29865123Speter do { 29965123Speter size += size / 10; 30065123Speter newprocs = realloc(procs, size); 301237844Skib if (newprocs == NULL) { 302237844Skib free(procs); 303237844Skib err(1, "could not reallocate memory"); 30465123Speter } 30565123Speter procs = newprocs; 30665123Speter st = sysctl(mib, miblen, procs, &size, NULL, 0); 30765123Speter } while (st == -1 && errno == ENOMEM); 30865123Speter if (st == -1) 30965123Speter err(1, "could not sysctl(KERN_PROC)"); 31065123Speter if (size % sizeof(struct kinfo_proc) != 0) { 311132192Stjr fprintf(stderr, "proc size mismatch (%zu total, %zu chunks)\n", 31265123Speter size, sizeof(struct kinfo_proc)); 313237846Skib fprintf(stderr, "userland out of sync with kernel\n"); 31465123Speter exit(1); 31565123Speter } 31665123Speter nprocs = size / sizeof(struct kinfo_proc); 31765123Speter if (dflag) 31865123Speter printf("nprocs %d\n", nprocs); 319124844Scperciva mypid = getpid(); 32065123Speter 32165123Speter for (i = 0; i < nprocs; i++) { 322237847Skib if (procs[i].ki_stat == SZOMB && !zflag) 32394689Sdes continue; 32469941Sjhb thispid = procs[i].ki_pid; 325185074Sdelphij strlcpy(thiscmd, procs[i].ki_comm, sizeof(thiscmd)); 32669941Sjhb thistdev = procs[i].ki_tdev; 327125013Sdds if (eflag) 328125013Sdds thisuid = procs[i].ki_uid; /* effective uid */ 329125013Sdds else 330125013Sdds thisuid = procs[i].ki_ruid; /* real uid */ 33165123Speter 332124844Scperciva if (thispid == mypid) 333124844Scperciva continue; 33465123Speter matched = 1; 33565123Speter if (user) { 33665123Speter if (thisuid != uid) 33765123Speter matched = 0; 33865123Speter } 33965123Speter if (tty) { 34065123Speter if (thistdev != tdev) 34165123Speter matched = 0; 34265123Speter } 34365123Speter if (cmd) { 34465123Speter if (mflag) { 34565123Speter if (regcomp(&rgx, cmd, 34665123Speter REG_EXTENDED|REG_NOSUB) != 0) { 34765123Speter mflag = 0; 34865123Speter warnx("%s: illegal regexp", cmd); 34965123Speter } 35065123Speter } 35165123Speter if (mflag) { 35265123Speter pmatch.rm_so = 0; 35365123Speter pmatch.rm_eo = strlen(thiscmd); 35465123Speter if (regexec(&rgx, thiscmd, 0, &pmatch, 35565123Speter REG_STARTEND) != 0) 35665123Speter matched = 0; 35765123Speter regfree(&rgx); 35865123Speter } else { 35972497Speter if (strncmp(thiscmd, cmd, MAXCOMLEN) != 0) 36065123Speter matched = 0; 36165123Speter } 36265123Speter } 363113277Smike if (jflag && thispid == getpid()) 364113277Smike matched = 0; 36565123Speter if (matched == 0) 36665123Speter continue; 36771309Sache if (ac > 0) 36871309Sache matched = 0; 36965123Speter for (j = 0; j < ac; j++) { 37065123Speter if (mflag) { 37165123Speter if (regcomp(&rgx, av[j], 37265123Speter REG_EXTENDED|REG_NOSUB) != 0) { 37365123Speter mflag = 0; 37465123Speter warnx("%s: illegal regexp", av[j]); 37565123Speter } 37665123Speter } 37765123Speter if (mflag) { 37865123Speter pmatch.rm_so = 0; 37965123Speter pmatch.rm_eo = strlen(thiscmd); 38065123Speter if (regexec(&rgx, thiscmd, 0, &pmatch, 38165123Speter REG_STARTEND) == 0) 38265123Speter matched = 1; 38365123Speter regfree(&rgx); 38465123Speter } else { 38565123Speter if (strcmp(thiscmd, av[j]) == 0) 38665123Speter matched = 1; 38765123Speter } 38865123Speter if (matched) 38965123Speter break; 39065123Speter } 391237618Sdelphij if (matched != 0 && Iflag) { 392237618Sdelphij printf("Send signal %d to %s (pid %d uid %d)? ", 393237618Sdelphij sig, thiscmd, thispid, thisuid); 394237618Sdelphij fflush(stdout); 395237618Sdelphij first = ch = getchar(); 396237618Sdelphij while (ch != '\n' && ch != EOF) 397237618Sdelphij ch = getchar(); 398237618Sdelphij if (first != 'y' && first != 'Y') 399237618Sdelphij matched = 0; 400237618Sdelphij } 40165123Speter if (matched == 0) 40265123Speter continue; 40365123Speter if (dflag) 40465123Speter printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 40565123Speter thiscmd, thispid, thistdev, thisuid); 40665123Speter 40765123Speter if (vflag || sflag) 408219347Sjilles printf("kill -%s %d\n", sys_signame[sig], thispid); 40965123Speter 41065123Speter killed++; 41165123Speter if (!dflag && !sflag) { 41265123Speter if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 41396976Sdd warn("warning: kill -%s %d", 414219347Sjilles sys_signame[sig], thispid); 41565123Speter errors = 1; 41665123Speter } 41765123Speter } 41865123Speter } 41965123Speter if (killed == 0) { 42065123Speter fprintf(stderr, "No matching processes %swere found\n", 42165123Speter getuid() != 0 ? "belonging to you " : ""); 42265123Speter errors = 1; 42365123Speter } 42465123Speter exit(errors); 42565123Speter} 426