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 * $FreeBSD$ 28 */ 29 30 #include <sys/cdefs.h> 31 #include <sys/param.h> 32 #include <sys/lock.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 char *prog; 50 51 static void __dead2 52 usage(void) 53 { 54 55 fprintf(stderr, "usage: %s [-l] [-v] [-m] [-sig] [-u user] [-t tty] [-c cmd] [cmd]...\n", prog); 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 mflag = 0; 117 uid_t uid = 0; 118 dev_t tdev = 0; 119 char thiscmd[MAXCOMLEN + 1]; 120 pid_t thispid; 121 uid_t thisuid; 122 dev_t thistdev; 123 int sig = SIGTERM; 124 const char *const *p; 125 char *ep; 126 int errors = 0; 127 int mib[4]; 128 size_t miblen; 129 int st, nprocs; 130 size_t size; 131 int matched; 132 int killed = 0; 133 134 prog = av[0]; 135 av++; 136 ac--; 137 138 while (ac > 0) { 139 if (strcmp(*av, "-l") == 0) { 140 printsig(stdout); 141 exit(0); 142 } 143 if (strcmp(*av, "-help") == 0) 144 usage(); 145 if (**av == '-') { 146 ++*av; 147 switch (**av) { 148 case 'u': 149 ++*av; 150 if (**av == '\0') 151 ++av; 152 --ac; 153 user = *av; 154 break; 155 case 't': 156 ++*av; 157 if (**av == '\0') 158 ++av; 159 --ac; 160 tty = *av; 161 break; 162 case 'c': 163 ++*av; 164 if (**av == '\0') 165 ++av; 166 --ac; 167 cmd = *av; 168 break; 169 case 'v': 170 vflag++; 171 break; 172 case 's': 173 sflag++; 174 break; 175 case 'd': 176 dflag++; 177 break; 178 case 'm': 179 mflag++; 180 break; 181 default: 182 if (isalpha(**av)) { 183 if (strncasecmp(*av, "sig", 3) == 0) 184 *av += 3; 185 for (sig = NSIG, p = sys_signame + 1; 186 --sig; ++p) 187 if (strcasecmp(*p, *av) == 0) { 188 sig = p - sys_signame; 189 break; 190 } 191 if (!sig) 192 nosig(*av); 193 } else if (isdigit(**av)) { 194 sig = strtol(*av, &ep, 10); 195 if (!*av || *ep) 196 errx(1, "illegal signal number: %s", *av); 197 if (sig < 0 || sig > NSIG) 198 nosig(*av); 199 } else 200 nosig(*av); 201 } 202 ++av; 203 --ac; 204 } else { 205 break; 206 } 207 } 208 209 if (user == NULL && tty == NULL && cmd == NULL && ac == 0) 210 usage(); 211 212 if (tty) { 213 if (strncmp(tty, "/dev/", 5) == 0) 214 snprintf(buf, sizeof(buf), "%s", tty); 215 else if (strncmp(tty, "tty", 3) == 0) 216 snprintf(buf, sizeof(buf), "/dev/%s", tty); 217 else 218 snprintf(buf, sizeof(buf), "/dev/tty%s", tty); 219 if (stat(buf, &sb) < 0) 220 err(1, "stat(%s)", buf); 221 if (!S_ISCHR(sb.st_mode)) 222 errx(1, "%s: not a character device", buf); 223 tdev = sb.st_rdev; 224 if (dflag) 225 printf("ttydev:0x%x\n", tdev); 226 } 227 if (user) { 228 uid = strtol(user, &ep, 10); 229 if ((ep - user) < strlen(user)) { 230 pw = getpwnam(user); 231 if (pw == NULL) 232 errx(1, "user %s does not exist", user); 233 uid = pw->pw_uid; 234 if (dflag) 235 printf("uid:%d\n", uid); 236 } 237 } else { 238 uid = getuid(); 239 if (uid != 0) { 240 pw = getpwuid(uid); 241 if (pw) 242 user = pw->pw_name; 243 if (dflag) 244 printf("uid:%d\n", uid); 245 } 246 } 247 size = 0; 248 mib[0] = CTL_KERN; 249 mib[1] = KERN_PROC; 250 mib[2] = KERN_PROC_ALL; 251 mib[3] = 0; 252 miblen = 3; 253 254 if (user && mib[2] == KERN_PROC_ALL) { 255 mib[2] = KERN_PROC_RUID; 256 mib[3] = uid; 257 miblen = 4; 258 } 259 if (tty && mib[2] == KERN_PROC_ALL) { 260 mib[2] = KERN_PROC_TTY; 261 mib[3] = tdev; 262 miblen = 4; 263 } 264 265 st = sysctl(mib, miblen, NULL, &size, NULL, 0); 266 do { 267 size += size / 10; 268 newprocs = realloc(procs, size); 269 if (newprocs == 0) { 270 if (procs) 271 free(procs); 272 errx(1, "could not reallocate memory"); 273 } 274 procs = newprocs; 275 st = sysctl(mib, miblen, procs, &size, NULL, 0); 276 } while (st == -1 && errno == ENOMEM); 277 if (st == -1) 278 err(1, "could not sysctl(KERN_PROC)"); 279 if (size % sizeof(struct kinfo_proc) != 0) { 280 fprintf(stderr, "proc size mismatch (%d total, %d chunks)\n", 281 size, sizeof(struct kinfo_proc)); 282 fprintf(stderr, "userland out of sync with kernel, recompile libkvm etc\n"); 283 exit(1); 284 } 285 nprocs = size / sizeof(struct kinfo_proc); 286 if (dflag) 287 printf("nprocs %d\n", nprocs); 288 289 for (i = 0; i < nprocs; i++) { 290 thispid = procs[i].ki_pid; 291 strncpy(thiscmd, procs[i].ki_comm, MAXCOMLEN); 292 thiscmd[MAXCOMLEN] = '\0'; 293 thistdev = procs[i].ki_tdev; 294 thisuid = procs[i].ki_ruid; /* real uid */ 295 296 matched = 1; 297 if (user) { 298 if (thisuid != uid) 299 matched = 0; 300 } 301 if (tty) { 302 if (thistdev != tdev) 303 matched = 0; 304 } 305 if (cmd) { 306 if (mflag) { 307 if (regcomp(&rgx, cmd, 308 REG_EXTENDED|REG_NOSUB) != 0) { 309 mflag = 0; 310 warnx("%s: illegal regexp", cmd); 311 } 312 } 313 if (mflag) { 314 pmatch.rm_so = 0; 315 pmatch.rm_eo = strlen(thiscmd); 316 if (regexec(&rgx, thiscmd, 0, &pmatch, 317 REG_STARTEND) != 0) 318 matched = 0; 319 regfree(&rgx); 320 } else { 321 if (strncmp(thiscmd, cmd, MAXCOMLEN) != 0) 322 matched = 0; 323 } 324 } 325 if (matched == 0) 326 continue; 327 if (ac > 0) 328 matched = 0; 329 for (j = 0; j < ac; j++) { 330 if (mflag) { 331 if (regcomp(&rgx, av[j], 332 REG_EXTENDED|REG_NOSUB) != 0) { 333 mflag = 0; 334 warnx("%s: illegal regexp", av[j]); 335 } 336 } 337 if (mflag) { 338 pmatch.rm_so = 0; 339 pmatch.rm_eo = strlen(thiscmd); 340 if (regexec(&rgx, thiscmd, 0, &pmatch, 341 REG_STARTEND) == 0) 342 matched = 1; 343 regfree(&rgx); 344 } else { 345 if (strcmp(thiscmd, av[j]) == 0) 346 matched = 1; 347 } 348 if (matched) 349 break; 350 } 351 if (matched == 0) 352 continue; 353 if (dflag) 354 printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 355 thiscmd, thispid, thistdev, thisuid); 356 357 if (vflag || sflag) 358 printf("kill -%s %d\n", upper(sys_signame[sig]), 359 thispid); 360 361 killed++; 362 if (!dflag && !sflag) { 363 if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 364 warn("kill -%s %d", upper(sys_signame[sig]), 365 thispid); 366 errors = 1; 367 } 368 } 369 } 370 if (killed == 0) { 371 fprintf(stderr, "No matching processes %swere found\n", 372 getuid() != 0 ? "belonging to you " : ""); 373 errors = 1; 374 } 375 exit(errors); 376 } 377