1 /*- 2 * Copyright (c) 2000 Peter Wemm <peter@FreeBSD.org> 3 * Copyright (c) 2000 Paul Saab <ps@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/jail.h> 33 #include <sys/stat.h> 34 #include <sys/user.h> 35 #include <sys/sysctl.h> 36 #include <fcntl.h> 37 #include <dirent.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <pwd.h> 42 #include <signal.h> 43 #include <regex.h> 44 #include <ctype.h> 45 #include <err.h> 46 #include <errno.h> 47 #include <unistd.h> 48 #include <locale.h> 49 50 static void __dead2 51 usage(void) 52 { 53 54 fprintf(stderr, "usage: killall [-delmsvz] [-help] [-j jid]\n"); 55 fprintf(stderr, 56 " [-u user] [-t tty] [-c cmd] [-SIGNAL] [cmd]...\n"); 57 fprintf(stderr, "At least one option or argument to specify processes must be given.\n"); 58 exit(1); 59 } 60 61 static char * 62 upper(const char *str) 63 { 64 static char buf[80]; 65 char *s; 66 67 strlcpy(buf, str, sizeof(buf)); 68 for (s = buf; *s; s++) 69 *s = toupper((unsigned char)*s); 70 return buf; 71 } 72 73 74 static void 75 printsig(FILE *fp) 76 { 77 const char *const * p; 78 int cnt; 79 int offset = 0; 80 81 for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) { 82 offset += fprintf(fp, "%s ", upper(*p)); 83 if (offset >= 75 && cnt > 1) { 84 offset = 0; 85 fprintf(fp, "\n"); 86 } 87 } 88 fprintf(fp, "\n"); 89 } 90 91 static void 92 nosig(char *name) 93 { 94 95 warnx("unknown signal %s; valid signals:", name); 96 printsig(stderr); 97 exit(1); 98 } 99 100 int 101 main(int ac, char **av) 102 { 103 struct kinfo_proc *procs = NULL, *newprocs; 104 struct stat sb; 105 struct passwd *pw; 106 regex_t rgx; 107 regmatch_t pmatch; 108 int i, j; 109 char buf[256]; 110 char *user = NULL; 111 char *tty = NULL; 112 char *cmd = NULL; 113 int vflag = 0; 114 int sflag = 0; 115 int dflag = 0; 116 int eflag = 0; 117 int jflag = 0; 118 int mflag = 0; 119 int zflag = 0; 120 uid_t uid = 0; 121 dev_t tdev = 0; 122 pid_t mypid; 123 char thiscmd[MAXCOMLEN + 1]; 124 pid_t thispid; 125 uid_t thisuid; 126 dev_t thistdev; 127 int sig = SIGTERM; 128 const char *const *p; 129 char *ep; 130 int errors = 0; 131 int jid; 132 int mib[4]; 133 size_t miblen; 134 int st, nprocs; 135 size_t size; 136 int matched; 137 int killed = 0; 138 139 setlocale(LC_ALL, ""); 140 141 av++; 142 ac--; 143 144 while (ac > 0) { 145 if (strcmp(*av, "-l") == 0) { 146 printsig(stdout); 147 exit(0); 148 } 149 if (strcmp(*av, "-help") == 0) 150 usage(); 151 if (**av == '-') { 152 ++*av; 153 switch (**av) { 154 case 'j': 155 ++*av; 156 if (**av == '\0') { 157 ++av; 158 --ac; 159 } 160 jflag++; 161 if (*av == NULL) 162 errx(1, "must specify jid"); 163 jid = strtol(*av, &ep, 10); 164 if (!*av || *ep) 165 errx(1, "illegal jid: %s", *av); 166 if (jail_attach(jid) == -1) 167 err(1, "jail_attach(): %d", jid); 168 break; 169 case 'u': 170 ++*av; 171 if (**av == '\0') { 172 ++av; 173 --ac; 174 } 175 if (*av == NULL) 176 errx(1, "must specify user"); 177 user = *av; 178 break; 179 case 't': 180 ++*av; 181 if (**av == '\0') { 182 ++av; 183 --ac; 184 } 185 if (*av == NULL) 186 errx(1, "must specify tty"); 187 tty = *av; 188 break; 189 case 'c': 190 ++*av; 191 if (**av == '\0') { 192 ++av; 193 --ac; 194 } 195 if (*av == NULL) 196 errx(1, "must specify procname"); 197 cmd = *av; 198 break; 199 case 'v': 200 vflag++; 201 break; 202 case 's': 203 sflag++; 204 break; 205 case 'd': 206 dflag++; 207 break; 208 case 'e': 209 eflag++; 210 break; 211 case 'm': 212 mflag++; 213 break; 214 case 'z': 215 zflag++; 216 break; 217 default: 218 if (isalpha((unsigned char)**av)) { 219 if (strncasecmp(*av, "sig", 3) == 0) 220 *av += 3; 221 for (sig = NSIG, p = sys_signame + 1; 222 --sig; ++p) 223 if (strcasecmp(*p, *av) == 0) { 224 sig = p - sys_signame; 225 break; 226 } 227 if (!sig) 228 nosig(*av); 229 } else if (isdigit((unsigned char)**av)) { 230 sig = strtol(*av, &ep, 10); 231 if (!*av || *ep) 232 errx(1, "illegal signal number: %s", *av); 233 if (sig < 0 || sig >= NSIG) 234 nosig(*av); 235 } else 236 nosig(*av); 237 } 238 ++av; 239 --ac; 240 } else { 241 break; 242 } 243 } 244 245 if (user == NULL && tty == NULL && cmd == NULL && !jflag && ac == 0) 246 usage(); 247 248 if (tty) { 249 if (strncmp(tty, "/dev/", 5) == 0) 250 snprintf(buf, sizeof(buf), "%s", tty); 251 else if (strncmp(tty, "tty", 3) == 0) 252 snprintf(buf, sizeof(buf), "/dev/%s", tty); 253 else 254 snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 255 if (stat(buf, &sb) < 0) 256 err(1, "stat(%s)", buf); 257 if (!S_ISCHR(sb.st_mode)) 258 errx(1, "%s: not a character device", buf); 259 tdev = sb.st_rdev; 260 if (dflag) 261 printf("ttydev:0x%x\n", tdev); 262 } 263 if (user) { 264 uid = strtol(user, &ep, 10); 265 if (*user == '\0' || *ep != '\0') { /* was it a number? */ 266 pw = getpwnam(user); 267 if (pw == NULL) 268 errx(1, "user %s does not exist", user); 269 uid = pw->pw_uid; 270 if (dflag) 271 printf("uid:%d\n", uid); 272 } 273 } else { 274 uid = getuid(); 275 if (uid != 0) { 276 pw = getpwuid(uid); 277 if (pw) 278 user = pw->pw_name; 279 if (dflag) 280 printf("uid:%d\n", uid); 281 } 282 } 283 size = 0; 284 mib[0] = CTL_KERN; 285 mib[1] = KERN_PROC; 286 mib[2] = KERN_PROC_PROC; 287 mib[3] = 0; 288 miblen = 3; 289 290 if (user) { 291 mib[2] = eflag ? KERN_PROC_UID : KERN_PROC_RUID; 292 mib[3] = uid; 293 miblen = 4; 294 } else if (tty) { 295 mib[2] = KERN_PROC_TTY; 296 mib[3] = tdev; 297 miblen = 4; 298 } 299 300 st = sysctl(mib, miblen, NULL, &size, NULL, 0); 301 do { 302 size += size / 10; 303 newprocs = realloc(procs, size); 304 if (newprocs == 0) { 305 if (procs) 306 free(procs); 307 errx(1, "could not reallocate memory"); 308 } 309 procs = newprocs; 310 st = sysctl(mib, miblen, procs, &size, NULL, 0); 311 } while (st == -1 && errno == ENOMEM); 312 if (st == -1) 313 err(1, "could not sysctl(KERN_PROC)"); 314 if (size % sizeof(struct kinfo_proc) != 0) { 315 fprintf(stderr, "proc size mismatch (%zu total, %zu chunks)\n", 316 size, sizeof(struct kinfo_proc)); 317 fprintf(stderr, "userland out of sync with kernel, recompile libkvm etc\n"); 318 exit(1); 319 } 320 nprocs = size / sizeof(struct kinfo_proc); 321 if (dflag) 322 printf("nprocs %d\n", nprocs); 323 mypid = getpid(); 324 325 for (i = 0; i < nprocs; i++) { 326 if ((procs[i].ki_stat & SZOMB) == SZOMB && !zflag) 327 continue; 328 thispid = procs[i].ki_pid; 329 strlcpy(thiscmd, procs[i].ki_comm, sizeof(thiscmd)); 330 thistdev = procs[i].ki_tdev; 331 if (eflag) 332 thisuid = procs[i].ki_uid; /* effective uid */ 333 else 334 thisuid = procs[i].ki_ruid; /* real uid */ 335 336 if (thispid == mypid) 337 continue; 338 matched = 1; 339 if (user) { 340 if (thisuid != uid) 341 matched = 0; 342 } 343 if (tty) { 344 if (thistdev != tdev) 345 matched = 0; 346 } 347 if (cmd) { 348 if (mflag) { 349 if (regcomp(&rgx, cmd, 350 REG_EXTENDED|REG_NOSUB) != 0) { 351 mflag = 0; 352 warnx("%s: illegal regexp", cmd); 353 } 354 } 355 if (mflag) { 356 pmatch.rm_so = 0; 357 pmatch.rm_eo = strlen(thiscmd); 358 if (regexec(&rgx, thiscmd, 0, &pmatch, 359 REG_STARTEND) != 0) 360 matched = 0; 361 regfree(&rgx); 362 } else { 363 if (strncmp(thiscmd, cmd, MAXCOMLEN) != 0) 364 matched = 0; 365 } 366 } 367 if (jflag && thispid == getpid()) 368 matched = 0; 369 if (matched == 0) 370 continue; 371 if (ac > 0) 372 matched = 0; 373 for (j = 0; j < ac; j++) { 374 if (mflag) { 375 if (regcomp(&rgx, av[j], 376 REG_EXTENDED|REG_NOSUB) != 0) { 377 mflag = 0; 378 warnx("%s: illegal regexp", av[j]); 379 } 380 } 381 if (mflag) { 382 pmatch.rm_so = 0; 383 pmatch.rm_eo = strlen(thiscmd); 384 if (regexec(&rgx, thiscmd, 0, &pmatch, 385 REG_STARTEND) == 0) 386 matched = 1; 387 regfree(&rgx); 388 } else { 389 if (strcmp(thiscmd, av[j]) == 0) 390 matched = 1; 391 } 392 if (matched) 393 break; 394 } 395 if (matched == 0) 396 continue; 397 if (dflag) 398 printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 399 thiscmd, thispid, thistdev, thisuid); 400 401 if (vflag || sflag) 402 printf("kill -%s %d\n", upper(sys_signame[sig]), 403 thispid); 404 405 killed++; 406 if (!dflag && !sflag) { 407 if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 408 warn("warning: kill -%s %d", 409 upper(sys_signame[sig]), thispid); 410 errors = 1; 411 } 412 } 413 } 414 if (killed == 0) { 415 fprintf(stderr, "No matching processes %swere found\n", 416 getuid() != 0 ? "belonging to you " : ""); 417 errors = 1; 418 } 419 exit(errors); 420 } 421