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/uio.h> 35 #include <sys/user.h> 36 #include <sys/sysctl.h> 37 #include <fcntl.h> 38 #include <dirent.h> 39 #include <jail.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <pwd.h> 44 #include <signal.h> 45 #include <regex.h> 46 #include <ctype.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <unistd.h> 50 #include <locale.h> 51 52 static void __dead2 53 usage(void) 54 { 55 56 fprintf(stderr, "usage: killall [-delmsvz] [-help] [-I] [-j jail]\n"); 57 fprintf(stderr, 58 " [-u user] [-t tty] [-c cmd] [-SIGNAL] [cmd]...\n"); 59 fprintf(stderr, "At least one option or argument to specify processes must be given.\n"); 60 exit(1); 61 } 62 63 64 static void 65 printsig(FILE *fp) 66 { 67 const char *const * p; 68 int cnt; 69 int offset = 0; 70 71 for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) { 72 offset += fprintf(fp, "%s ", *p); 73 if (offset >= 75 && cnt > 1) { 74 offset = 0; 75 fprintf(fp, "\n"); 76 } 77 } 78 fprintf(fp, "\n"); 79 } 80 81 static void 82 nosig(char *name) 83 { 84 85 warnx("unknown signal %s; valid signals:", name); 86 printsig(stderr); 87 exit(1); 88 } 89 90 int 91 main(int ac, char **av) 92 { 93 struct kinfo_proc *procs, *newprocs; 94 struct stat sb; 95 struct passwd *pw; 96 regex_t rgx; 97 regmatch_t pmatch; 98 int i, j, ch; 99 char buf[256]; 100 char first; 101 char *user = NULL; 102 char *tty = NULL; 103 char *cmd = NULL; 104 int vflag = 0; 105 int sflag = 0; 106 int dflag = 0; 107 int eflag = 0; 108 int Iflag = 0; 109 int jflag = 0; 110 int mflag = 0; 111 int zflag = 0; 112 uid_t uid = 0; 113 dev_t tdev = 0; 114 pid_t mypid; 115 char thiscmd[MAXCOMLEN + 1]; 116 pid_t thispid; 117 uid_t thisuid; 118 dev_t thistdev; 119 int sig = SIGTERM; 120 const char *const *p; 121 char *ep; 122 int errors = 0; 123 int jid; 124 int mib[4]; 125 size_t miblen; 126 int st, nprocs; 127 size_t size; 128 int matched; 129 int killed = 0; 130 131 setlocale(LC_ALL, ""); 132 133 av++; 134 ac--; 135 136 while (ac > 0) { 137 if (strcmp(*av, "-l") == 0) { 138 printsig(stdout); 139 exit(0); 140 } 141 if (strcmp(*av, "-help") == 0) 142 usage(); 143 if (**av == '-') { 144 ++*av; 145 switch (**av) { 146 case 'I': 147 Iflag = 1; 148 break; 149 case 'j': 150 ++*av; 151 if (**av == '\0') { 152 ++av; 153 --ac; 154 } 155 jflag++; 156 if (*av == NULL) 157 errx(1, "must specify jail"); 158 jid = jail_getid(*av); 159 if (jid < 0) 160 errx(1, "%s", jail_errmsg); 161 if (jail_attach(jid) == -1) 162 err(1, "jail_attach(%d)", jid); 163 break; 164 case 'u': 165 ++*av; 166 if (**av == '\0') { 167 ++av; 168 --ac; 169 } 170 if (*av == NULL) 171 errx(1, "must specify user"); 172 user = *av; 173 break; 174 case 't': 175 ++*av; 176 if (**av == '\0') { 177 ++av; 178 --ac; 179 } 180 if (*av == NULL) 181 errx(1, "must specify tty"); 182 tty = *av; 183 break; 184 case 'c': 185 ++*av; 186 if (**av == '\0') { 187 ++av; 188 --ac; 189 } 190 if (*av == NULL) 191 errx(1, "must specify procname"); 192 cmd = *av; 193 break; 194 case 'v': 195 vflag++; 196 break; 197 case 's': 198 sflag++; 199 break; 200 case 'd': 201 dflag++; 202 break; 203 case 'e': 204 eflag++; 205 break; 206 case 'm': 207 mflag++; 208 break; 209 case 'z': 210 zflag++; 211 break; 212 default: 213 if (isalpha((unsigned char)**av)) { 214 if (strncasecmp(*av, "SIG", 3) == 0) 215 *av += 3; 216 for (sig = NSIG, p = sys_signame + 1; 217 --sig; ++p) 218 if (strcasecmp(*p, *av) == 0) { 219 sig = p - sys_signame; 220 break; 221 } 222 if (!sig) 223 nosig(*av); 224 } else if (isdigit((unsigned char)**av)) { 225 sig = strtol(*av, &ep, 10); 226 if (!*av || *ep) 227 errx(1, "illegal signal number: %s", *av); 228 if (sig < 0 || sig >= NSIG) 229 nosig(*av); 230 } else 231 nosig(*av); 232 } 233 ++av; 234 --ac; 235 } else { 236 break; 237 } 238 } 239 240 if (user == NULL && tty == NULL && cmd == NULL && !jflag && ac == 0) 241 usage(); 242 243 if (tty) { 244 if (strncmp(tty, "/dev/", 5) == 0) 245 snprintf(buf, sizeof(buf), "%s", tty); 246 else if (strncmp(tty, "tty", 3) == 0) 247 snprintf(buf, sizeof(buf), "/dev/%s", tty); 248 else 249 snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 250 if (stat(buf, &sb) < 0) 251 err(1, "stat(%s)", buf); 252 if (!S_ISCHR(sb.st_mode)) 253 errx(1, "%s: not a character device", buf); 254 tdev = sb.st_rdev; 255 if (dflag) 256 printf("ttydev:0x%x\n", tdev); 257 } 258 if (user) { 259 uid = strtol(user, &ep, 10); 260 if (*user == '\0' || *ep != '\0') { /* was it a number? */ 261 pw = getpwnam(user); 262 if (pw == NULL) 263 errx(1, "user %s does not exist", user); 264 uid = pw->pw_uid; 265 if (dflag) 266 printf("uid:%d\n", uid); 267 } 268 } else { 269 uid = getuid(); 270 if (uid != 0) { 271 pw = getpwuid(uid); 272 if (pw) 273 user = pw->pw_name; 274 if (dflag) 275 printf("uid:%d\n", uid); 276 } 277 } 278 size = 0; 279 mib[0] = CTL_KERN; 280 mib[1] = KERN_PROC; 281 282 if (user) { 283 mib[2] = eflag ? KERN_PROC_UID : KERN_PROC_RUID; 284 mib[3] = uid; 285 miblen = 4; 286 } else if (tty) { 287 mib[2] = KERN_PROC_TTY; 288 mib[3] = tdev; 289 miblen = 4; 290 } else { 291 mib[2] = KERN_PROC_PROC; 292 mib[3] = 0; 293 miblen = 3; 294 } 295 296 procs = NULL; 297 st = sysctl(mib, miblen, NULL, &size, NULL, 0); 298 do { 299 size += size / 10; 300 newprocs = realloc(procs, size); 301 if (newprocs == NULL) { 302 free(procs); 303 err(1, "could not reallocate memory"); 304 } 305 procs = newprocs; 306 st = sysctl(mib, miblen, procs, &size, NULL, 0); 307 } while (st == -1 && errno == ENOMEM); 308 if (st == -1) 309 err(1, "could not sysctl(KERN_PROC)"); 310 if (size % sizeof(struct kinfo_proc) != 0) { 311 fprintf(stderr, "proc size mismatch (%zu total, %zu chunks)\n", 312 size, sizeof(struct kinfo_proc)); 313 fprintf(stderr, "userland out of sync with kernel\n"); 314 exit(1); 315 } 316 nprocs = size / sizeof(struct kinfo_proc); 317 if (dflag) 318 printf("nprocs %d\n", nprocs); 319 mypid = getpid(); 320 321 for (i = 0; i < nprocs; i++) { 322 if (procs[i].ki_stat == SZOMB && !zflag) 323 continue; 324 thispid = procs[i].ki_pid; 325 strlcpy(thiscmd, procs[i].ki_comm, sizeof(thiscmd)); 326 thistdev = procs[i].ki_tdev; 327 if (eflag) 328 thisuid = procs[i].ki_uid; /* effective uid */ 329 else 330 thisuid = procs[i].ki_ruid; /* real uid */ 331 332 if (thispid == mypid) 333 continue; 334 matched = 1; 335 if (user) { 336 if (thisuid != uid) 337 matched = 0; 338 } 339 if (tty) { 340 if (thistdev != tdev) 341 matched = 0; 342 } 343 if (cmd) { 344 if (mflag) { 345 if (regcomp(&rgx, cmd, 346 REG_EXTENDED|REG_NOSUB) != 0) { 347 mflag = 0; 348 warnx("%s: illegal regexp", cmd); 349 } 350 } 351 if (mflag) { 352 pmatch.rm_so = 0; 353 pmatch.rm_eo = strlen(thiscmd); 354 if (regexec(&rgx, thiscmd, 0, &pmatch, 355 REG_STARTEND) != 0) 356 matched = 0; 357 regfree(&rgx); 358 } else { 359 if (strncmp(thiscmd, cmd, MAXCOMLEN) != 0) 360 matched = 0; 361 } 362 } 363 if (jflag && thispid == getpid()) 364 matched = 0; 365 if (matched == 0) 366 continue; 367 if (ac > 0) 368 matched = 0; 369 for (j = 0; j < ac; j++) { 370 if (mflag) { 371 if (regcomp(&rgx, av[j], 372 REG_EXTENDED|REG_NOSUB) != 0) { 373 mflag = 0; 374 warnx("%s: illegal regexp", av[j]); 375 } 376 } 377 if (mflag) { 378 pmatch.rm_so = 0; 379 pmatch.rm_eo = strlen(thiscmd); 380 if (regexec(&rgx, thiscmd, 0, &pmatch, 381 REG_STARTEND) == 0) 382 matched = 1; 383 regfree(&rgx); 384 } else { 385 if (strcmp(thiscmd, av[j]) == 0) 386 matched = 1; 387 } 388 if (matched) 389 break; 390 } 391 if (matched != 0 && Iflag) { 392 printf("Send signal %d to %s (pid %d uid %d)? ", 393 sig, thiscmd, thispid, thisuid); 394 fflush(stdout); 395 first = ch = getchar(); 396 while (ch != '\n' && ch != EOF) 397 ch = getchar(); 398 if (first != 'y' && first != 'Y') 399 matched = 0; 400 } 401 if (matched == 0) 402 continue; 403 if (dflag) 404 printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 405 thiscmd, thispid, thistdev, thisuid); 406 407 if (vflag || sflag) 408 printf("kill -%s %d\n", sys_signame[sig], thispid); 409 410 killed++; 411 if (!dflag && !sflag) { 412 if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 413 warn("warning: kill -%s %d", 414 sys_signame[sig], thispid); 415 errors = 1; 416 } 417 } 418 } 419 if (killed == 0) { 420 fprintf(stderr, "No matching processes %swere found\n", 421 getuid() != 0 ? "belonging to you " : ""); 422 errors = 1; 423 } 424 exit(errors); 425 } 426