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 49 static void __dead2 50 usage(void) 51 { 52 53 fprintf(stderr, "usage: killall [-l] [-v] [-m] [-sig] [-j jid]\n"); 54 fprintf(stderr, 55 " [-u user] [-t tty] [-c cmd] [cmd]...\n"); 56 fprintf(stderr, "At least one option or argument to specify processes must be given.\n"); 57 exit(1); 58 } 59 60 static char * 61 upper(const char *str) 62 { 63 static char buf[80]; 64 char *s; 65 66 strncpy(buf, str, sizeof(buf)); 67 buf[sizeof(buf) - 1] = '\0'; 68 for (s = buf; *s; s++) 69 *s = toupper(*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 jflag = 0; 117 int mflag = 0; 118 int zflag = 0; 119 uid_t uid = 0; 120 dev_t tdev = 0; 121 char thiscmd[MAXCOMLEN + 1]; 122 pid_t thispid; 123 uid_t thisuid; 124 dev_t thistdev; 125 int sig = SIGTERM; 126 const char *const *p; 127 char *ep; 128 int errors = 0; 129 int jid; 130 int mib[4]; 131 size_t miblen; 132 int st, nprocs; 133 size_t size; 134 int matched; 135 int killed = 0; 136 137 av++; 138 ac--; 139 140 while (ac > 0) { 141 if (strcmp(*av, "-l") == 0) { 142 printsig(stdout); 143 exit(0); 144 } 145 if (strcmp(*av, "-help") == 0) 146 usage(); 147 if (**av == '-') { 148 ++*av; 149 switch (**av) { 150 case 'j': 151 ++*av; 152 if (**av == '\0') 153 ++av; 154 --ac; 155 jflag++; 156 if (!*av) 157 errx(1, "must specify jid"); 158 jid = strtol(*av, &ep, 10); 159 if (!*av || *ep) 160 errx(1, "illegal jid: %s", *av); 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 user = *av; 170 break; 171 case 't': 172 ++*av; 173 if (**av == '\0') 174 ++av; 175 --ac; 176 tty = *av; 177 break; 178 case 'c': 179 ++*av; 180 if (**av == '\0') 181 ++av; 182 --ac; 183 cmd = *av; 184 break; 185 case 'v': 186 vflag++; 187 break; 188 case 's': 189 sflag++; 190 break; 191 case 'd': 192 dflag++; 193 break; 194 case 'm': 195 mflag++; 196 break; 197 case 'z': 198 zflag++; 199 break; 200 default: 201 if (isalpha(**av)) { 202 if (strncasecmp(*av, "sig", 3) == 0) 203 *av += 3; 204 for (sig = NSIG, p = sys_signame + 1; 205 --sig; ++p) 206 if (strcasecmp(*p, *av) == 0) { 207 sig = p - sys_signame; 208 break; 209 } 210 if (!sig) 211 nosig(*av); 212 } else if (isdigit(**av)) { 213 sig = strtol(*av, &ep, 10); 214 if (!*av || *ep) 215 errx(1, "illegal signal number: %s", *av); 216 if (sig < 0 || sig > NSIG) 217 nosig(*av); 218 } else 219 nosig(*av); 220 } 221 ++av; 222 --ac; 223 } else { 224 break; 225 } 226 } 227 228 if (user == NULL && tty == NULL && cmd == NULL && !jflag && ac == 0) 229 usage(); 230 231 if (tty) { 232 if (strncmp(tty, "/dev/", 5) == 0) 233 snprintf(buf, sizeof(buf), "%s", tty); 234 else if (strncmp(tty, "tty", 3) == 0) 235 snprintf(buf, sizeof(buf), "/dev/%s", tty); 236 else 237 snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 238 if (stat(buf, &sb) < 0) 239 err(1, "stat(%s)", buf); 240 if (!S_ISCHR(sb.st_mode)) 241 errx(1, "%s: not a character device", buf); 242 tdev = sb.st_rdev; 243 if (dflag) 244 printf("ttydev:0x%x\n", tdev); 245 } 246 if (user) { 247 uid = strtol(user, &ep, 10); 248 if (*user == '\0' || *ep != '\0') { /* was it a number? */ 249 pw = getpwnam(user); 250 if (pw == NULL) 251 errx(1, "user %s does not exist", user); 252 uid = pw->pw_uid; 253 if (dflag) 254 printf("uid:%d\n", uid); 255 } 256 } else { 257 uid = getuid(); 258 if (uid != 0) { 259 pw = getpwuid(uid); 260 if (pw) 261 user = pw->pw_name; 262 if (dflag) 263 printf("uid:%d\n", uid); 264 } 265 } 266 size = 0; 267 mib[0] = CTL_KERN; 268 mib[1] = KERN_PROC; 269 mib[2] = KERN_PROC_PROC; 270 mib[3] = 0; 271 miblen = 4; 272 273 if (user) { 274 mib[2] = KERN_PROC_RUID; 275 mib[3] = uid; 276 } else if (tty) { 277 mib[2] = KERN_PROC_TTY; 278 mib[3] = tdev; 279 } 280 281 st = sysctl(mib, miblen, NULL, &size, NULL, 0); 282 do { 283 size += size / 10; 284 newprocs = realloc(procs, size); 285 if (newprocs == 0) { 286 if (procs) 287 free(procs); 288 errx(1, "could not reallocate memory"); 289 } 290 procs = newprocs; 291 st = sysctl(mib, miblen, procs, &size, NULL, 0); 292 } while (st == -1 && errno == ENOMEM); 293 if (st == -1) 294 err(1, "could not sysctl(KERN_PROC)"); 295 if (size % sizeof(struct kinfo_proc) != 0) { 296 fprintf(stderr, "proc size mismatch (%d total, %d chunks)\n", 297 size, sizeof(struct kinfo_proc)); 298 fprintf(stderr, "userland out of sync with kernel, recompile libkvm etc\n"); 299 exit(1); 300 } 301 nprocs = size / sizeof(struct kinfo_proc); 302 if (dflag) 303 printf("nprocs %d\n", nprocs); 304 305 for (i = 0; i < nprocs; i++) { 306 if ((procs[i].ki_stat & SZOMB) == SZOMB && !zflag) 307 continue; 308 thispid = procs[i].ki_pid; 309 strncpy(thiscmd, procs[i].ki_comm, MAXCOMLEN); 310 thiscmd[MAXCOMLEN] = '\0'; 311 thistdev = procs[i].ki_tdev; 312 thisuid = procs[i].ki_ruid; /* real uid */ 313 314 matched = 1; 315 if (user) { 316 if (thisuid != uid) 317 matched = 0; 318 } 319 if (tty) { 320 if (thistdev != tdev) 321 matched = 0; 322 } 323 if (cmd) { 324 if (mflag) { 325 if (regcomp(&rgx, cmd, 326 REG_EXTENDED|REG_NOSUB) != 0) { 327 mflag = 0; 328 warnx("%s: illegal regexp", cmd); 329 } 330 } 331 if (mflag) { 332 pmatch.rm_so = 0; 333 pmatch.rm_eo = strlen(thiscmd); 334 if (regexec(&rgx, thiscmd, 0, &pmatch, 335 REG_STARTEND) != 0) 336 matched = 0; 337 regfree(&rgx); 338 } else { 339 if (strncmp(thiscmd, cmd, MAXCOMLEN) != 0) 340 matched = 0; 341 } 342 } 343 if (jflag && thispid == getpid()) 344 matched = 0; 345 if (matched == 0) 346 continue; 347 if (ac > 0) 348 matched = 0; 349 for (j = 0; j < ac; j++) { 350 if (mflag) { 351 if (regcomp(&rgx, av[j], 352 REG_EXTENDED|REG_NOSUB) != 0) { 353 mflag = 0; 354 warnx("%s: illegal regexp", av[j]); 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 = 1; 363 regfree(&rgx); 364 } else { 365 if (strcmp(thiscmd, av[j]) == 0) 366 matched = 1; 367 } 368 if (matched) 369 break; 370 } 371 if (matched == 0) 372 continue; 373 if (dflag) 374 printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 375 thiscmd, thispid, thistdev, thisuid); 376 377 if (vflag || sflag) 378 printf("kill -%s %d\n", upper(sys_signame[sig]), 379 thispid); 380 381 killed++; 382 if (!dflag && !sflag) { 383 if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 384 warn("warning: kill -%s %d", 385 upper(sys_signame[sig]), thispid); 386 errors = 1; 387 } 388 } 389 } 390 if (killed == 0) { 391 fprintf(stderr, "No matching processes %swere found\n", 392 getuid() != 0 ? "belonging to you " : ""); 393 errors = 1; 394 } 395 exit(errors); 396 } 397