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 strncpy(buf, str, sizeof(buf)); 68 buf[sizeof(buf) - 1] = '\0'; 69 for (s = buf; *s; s++) 70 *s = toupper((unsigned char)*s); 71 return buf; 72 } 73 74 75 static void 76 printsig(FILE *fp) 77 { 78 const char *const * p; 79 int cnt; 80 int offset = 0; 81 82 for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) { 83 offset += fprintf(fp, "%s ", upper(*p)); 84 if (offset >= 75 && cnt > 1) { 85 offset = 0; 86 fprintf(fp, "\n"); 87 } 88 } 89 fprintf(fp, "\n"); 90 } 91 92 static void 93 nosig(char *name) 94 { 95 96 warnx("unknown signal %s; valid signals:", name); 97 printsig(stderr); 98 exit(1); 99 } 100 101 int 102 main(int ac, char **av) 103 { 104 struct kinfo_proc *procs = NULL, *newprocs; 105 struct stat sb; 106 struct passwd *pw; 107 regex_t rgx; 108 regmatch_t pmatch; 109 int i, j; 110 char buf[256]; 111 char *user = NULL; 112 char *tty = NULL; 113 char *cmd = NULL; 114 int vflag = 0; 115 int sflag = 0; 116 int dflag = 0; 117 int eflag = 0; 118 int jflag = 0; 119 int mflag = 0; 120 int zflag = 0; 121 uid_t uid = 0; 122 dev_t tdev = 0; 123 pid_t mypid; 124 char thiscmd[MAXCOMLEN + 1]; 125 pid_t thispid; 126 uid_t thisuid; 127 dev_t thistdev; 128 int sig = SIGTERM; 129 const char *const *p; 130 char *ep; 131 int errors = 0; 132 int jid; 133 int mib[4]; 134 size_t miblen; 135 int st, nprocs; 136 size_t size; 137 int matched; 138 int killed = 0; 139 140 setlocale(LC_ALL, ""); 141 142 av++; 143 ac--; 144 145 while (ac > 0) { 146 if (strcmp(*av, "-l") == 0) { 147 printsig(stdout); 148 exit(0); 149 } 150 if (strcmp(*av, "-help") == 0) 151 usage(); 152 if (**av == '-') { 153 ++*av; 154 switch (**av) { 155 case 'j': 156 ++*av; 157 if (**av == '\0') { 158 ++av; 159 --ac; 160 } 161 jflag++; 162 if (*av == NULL) 163 errx(1, "must specify jid"); 164 jid = strtol(*av, &ep, 10); 165 if (!*av || *ep) 166 errx(1, "illegal jid: %s", *av); 167 if (jail_attach(jid) == -1) 168 err(1, "jail_attach(): %d", jid); 169 break; 170 case 'u': 171 ++*av; 172 if (**av == '\0') { 173 ++av; 174 --ac; 175 } 176 if (*av == NULL) 177 errx(1, "must specify user"); 178 user = *av; 179 break; 180 case 't': 181 ++*av; 182 if (**av == '\0') { 183 ++av; 184 --ac; 185 } 186 if (*av == NULL) 187 errx(1, "must specify tty"); 188 tty = *av; 189 break; 190 case 'c': 191 ++*av; 192 if (**av == '\0') { 193 ++av; 194 --ac; 195 } 196 if (*av == NULL) 197 errx(1, "must specify procname"); 198 cmd = *av; 199 break; 200 case 'v': 201 vflag++; 202 break; 203 case 's': 204 sflag++; 205 break; 206 case 'd': 207 dflag++; 208 break; 209 case 'e': 210 eflag++; 211 break; 212 case 'm': 213 mflag++; 214 break; 215 case 'z': 216 zflag++; 217 break; 218 default: 219 if (isalpha((unsigned char)**av)) { 220 if (strncasecmp(*av, "sig", 3) == 0) 221 *av += 3; 222 for (sig = NSIG, p = sys_signame + 1; 223 --sig; ++p) 224 if (strcasecmp(*p, *av) == 0) { 225 sig = p - sys_signame; 226 break; 227 } 228 if (!sig) 229 nosig(*av); 230 } else if (isdigit((unsigned char)**av)) { 231 sig = strtol(*av, &ep, 10); 232 if (!*av || *ep) 233 errx(1, "illegal signal number: %s", *av); 234 if (sig < 0 || sig >= NSIG) 235 nosig(*av); 236 } else 237 nosig(*av); 238 } 239 ++av; 240 --ac; 241 } else { 242 break; 243 } 244 } 245 246 if (user == NULL && tty == NULL && cmd == NULL && !jflag && ac == 0) 247 usage(); 248 249 if (tty) { 250 if (strncmp(tty, "/dev/", 5) == 0) 251 snprintf(buf, sizeof(buf), "%s", tty); 252 else if (strncmp(tty, "tty", 3) == 0) 253 snprintf(buf, sizeof(buf), "/dev/%s", tty); 254 else 255 snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 256 if (stat(buf, &sb) < 0) 257 err(1, "stat(%s)", buf); 258 if (!S_ISCHR(sb.st_mode)) 259 errx(1, "%s: not a character device", buf); 260 tdev = sb.st_rdev; 261 if (dflag) 262 printf("ttydev:0x%x\n", tdev); 263 } 264 if (user) { 265 uid = strtol(user, &ep, 10); 266 if (*user == '\0' || *ep != '\0') { /* was it a number? */ 267 pw = getpwnam(user); 268 if (pw == NULL) 269 errx(1, "user %s does not exist", user); 270 uid = pw->pw_uid; 271 if (dflag) 272 printf("uid:%d\n", uid); 273 } 274 } else { 275 uid = getuid(); 276 if (uid != 0) { 277 pw = getpwuid(uid); 278 if (pw) 279 user = pw->pw_name; 280 if (dflag) 281 printf("uid:%d\n", uid); 282 } 283 } 284 size = 0; 285 mib[0] = CTL_KERN; 286 mib[1] = KERN_PROC; 287 mib[2] = KERN_PROC_PROC; 288 mib[3] = 0; 289 miblen = 3; 290 291 if (user) { 292 mib[2] = eflag ? KERN_PROC_UID : KERN_PROC_RUID; 293 mib[3] = uid; 294 miblen = 4; 295 } else if (tty) { 296 mib[2] = KERN_PROC_TTY; 297 mib[3] = tdev; 298 miblen = 4; 299 } 300 301 st = sysctl(mib, miblen, NULL, &size, NULL, 0); 302 do { 303 size += size / 10; 304 newprocs = realloc(procs, size); 305 if (newprocs == 0) { 306 if (procs) 307 free(procs); 308 errx(1, "could not reallocate memory"); 309 } 310 procs = newprocs; 311 st = sysctl(mib, miblen, procs, &size, NULL, 0); 312 } while (st == -1 && errno == ENOMEM); 313 if (st == -1) 314 err(1, "could not sysctl(KERN_PROC)"); 315 if (size % sizeof(struct kinfo_proc) != 0) { 316 fprintf(stderr, "proc size mismatch (%zu total, %zu chunks)\n", 317 size, sizeof(struct kinfo_proc)); 318 fprintf(stderr, "userland out of sync with kernel, recompile libkvm etc\n"); 319 exit(1); 320 } 321 nprocs = size / sizeof(struct kinfo_proc); 322 if (dflag) 323 printf("nprocs %d\n", nprocs); 324 mypid = getpid(); 325 326 for (i = 0; i < nprocs; i++) { 327 if ((procs[i].ki_stat & SZOMB) == SZOMB && !zflag) 328 continue; 329 thispid = procs[i].ki_pid; 330 strncpy(thiscmd, procs[i].ki_comm, MAXCOMLEN); 331 thiscmd[MAXCOMLEN] = '\0'; 332 thistdev = procs[i].ki_tdev; 333 if (eflag) 334 thisuid = procs[i].ki_uid; /* effective uid */ 335 else 336 thisuid = procs[i].ki_ruid; /* real uid */ 337 338 if (thispid == mypid) 339 continue; 340 matched = 1; 341 if (user) { 342 if (thisuid != uid) 343 matched = 0; 344 } 345 if (tty) { 346 if (thistdev != tdev) 347 matched = 0; 348 } 349 if (cmd) { 350 if (mflag) { 351 if (regcomp(&rgx, cmd, 352 REG_EXTENDED|REG_NOSUB) != 0) { 353 mflag = 0; 354 warnx("%s: illegal regexp", cmd); 355 } 356 } 357 if (mflag) { 358 pmatch.rm_so = 0; 359 pmatch.rm_eo = strlen(thiscmd); 360 if (regexec(&rgx, thiscmd, 0, &pmatch, 361 REG_STARTEND) != 0) 362 matched = 0; 363 regfree(&rgx); 364 } else { 365 if (strncmp(thiscmd, cmd, MAXCOMLEN) != 0) 366 matched = 0; 367 } 368 } 369 if (jflag && thispid == getpid()) 370 matched = 0; 371 if (matched == 0) 372 continue; 373 if (ac > 0) 374 matched = 0; 375 for (j = 0; j < ac; j++) { 376 if (mflag) { 377 if (regcomp(&rgx, av[j], 378 REG_EXTENDED|REG_NOSUB) != 0) { 379 mflag = 0; 380 warnx("%s: illegal regexp", av[j]); 381 } 382 } 383 if (mflag) { 384 pmatch.rm_so = 0; 385 pmatch.rm_eo = strlen(thiscmd); 386 if (regexec(&rgx, thiscmd, 0, &pmatch, 387 REG_STARTEND) == 0) 388 matched = 1; 389 regfree(&rgx); 390 } else { 391 if (strcmp(thiscmd, av[j]) == 0) 392 matched = 1; 393 } 394 if (matched) 395 break; 396 } 397 if (matched == 0) 398 continue; 399 if (dflag) 400 printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 401 thiscmd, thispid, thistdev, thisuid); 402 403 if (vflag || sflag) 404 printf("kill -%s %d\n", upper(sys_signame[sig]), 405 thispid); 406 407 killed++; 408 if (!dflag && !sflag) { 409 if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 410 warn("warning: kill -%s %d", 411 upper(sys_signame[sig]), thispid); 412 errors = 1; 413 } 414 } 415 } 416 if (killed == 0) { 417 fprintf(stderr, "No matching processes %swere found\n", 418 getuid() != 0 ? "belonging to you " : ""); 419 errors = 1; 420 } 421 exit(errors); 422 } 423