killall.c revision 65177
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: head/usr.bin/killall/killall.c 65177 2000-08-28 22:09:38Z peter $ 28 */ 29 30#include <sys/cdefs.h> 31#include <sys/param.h> 32#include <sys/stat.h> 33#include <sys/user.h> 34#include <sys/sysctl.h> 35#include <fcntl.h> 36#include <dirent.h> 37#include <stdio.h> 38#include <stdlib.h> 39#include <string.h> 40#include <pwd.h> 41#include <signal.h> 42#include <regex.h> 43#include <ctype.h> 44#include <err.h> 45#include <errno.h> 46#include <unistd.h> 47 48static char *prog; 49 50static void __dead2 51usage(void) 52{ 53 54 fprintf(stderr, "usage: %s [-l] [-v] [-m] [-sig] [-u user] [-t tty] [-c cmd] [cmd]...\n", prog); 55 fprintf(stderr, "At least one option or argument to specify processes must be given.\n"); 56 exit(1); 57} 58 59static char * 60upper(const char *str) 61{ 62 static char buf[80]; 63 char *s; 64 65 strncpy(buf, str, sizeof(buf)); 66 buf[sizeof(buf) - 1] = '\0'; 67 for (s = buf; *s; s++) 68 *s = toupper(*s); 69 return buf; 70} 71 72 73static void 74printsig(FILE *fp) 75{ 76 const char *const * p; 77 int cnt; 78 int offset = 0; 79 80 for (cnt = NSIG, p = sys_signame + 1; --cnt; ++p) { 81 offset += fprintf(fp, "%s ", upper(*p)); 82 if (offset >= 75 && cnt > 1) { 83 offset = 0; 84 fprintf(fp, "\n"); 85 } 86 } 87 fprintf(fp, "\n"); 88} 89 90static void 91nosig(char *name) 92{ 93 94 warnx("unknown signal %s; valid signals:", name); 95 printsig(stderr); 96 exit(1); 97} 98 99int 100main(int ac, char **av) 101{ 102 struct kinfo_proc *procs = NULL, *newprocs; 103 struct stat sb; 104 struct passwd *pw; 105 regex_t rgx; 106 regmatch_t pmatch; 107 int i, j; 108 char buf[256]; 109 char *user = NULL; 110 char *tty = NULL; 111 char *cmd = NULL; 112 int vflag = 0; 113 int sflag = 0; 114 int dflag = 0; 115 int mflag = 0; 116 uid_t uid = 0; 117 dev_t tdev = 0; 118 char thiscmd[MAXCOMLEN + 1]; 119 pid_t thispid; 120 uid_t thisuid; 121 dev_t thistdev; 122 int sig = SIGTERM; 123 const char *const *p; 124 char *ep; 125 int errors = 0; 126 int mib[3]; 127 size_t miblen; 128 int st, nprocs; 129 size_t size; 130 int matched; 131 int killed = 0; 132 133 prog = av[0]; 134 av++; 135 ac--; 136 137 while (ac > 0) { 138 if (strcmp(*av, "-l") == 0) { 139 printsig(stdout); 140 exit(0); 141 } 142 if (strcmp(*av, "-help") == 0) 143 usage(); 144 if (**av == '-') { 145 ++*av; 146 switch (**av) { 147 case 'U': 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 pw = getpwnam(user); 229 if (pw == NULL) 230 errx(1, "user %s does not exist", user); 231 uid = pw->pw_uid; 232 if (dflag) 233 printf("uid:%d\n", uid); 234 } else { 235 uid = getuid(); 236 if (uid != 0) { 237 pw = getpwuid(uid); 238 if (pw) 239 user = pw->pw_name; 240 if (dflag) 241 printf("uid:%d\n", uid); 242 } 243 } 244 size = 0; 245 mib[0] = CTL_KERN; 246 mib[1] = KERN_PROC; 247 mib[2] = KERN_PROC_ALL; 248 mib[3] = 0; 249 miblen = 3; 250 251 if (user && mib[2] == KERN_PROC_ALL) { 252 mib[2] = KERN_PROC_UID; 253 mib[3] = uid; 254 miblen = 4; 255 } 256 if (tty && mib[2] == KERN_PROC_ALL) { 257 mib[2] = KERN_PROC_TTY; 258 mib[3] = tdev; 259 miblen = 4; 260 } 261 262 st = sysctl(mib, miblen, NULL, &size, NULL, 0); 263 do { 264 size += size / 10; 265 newprocs = realloc(procs, size); 266 if (newprocs == 0) { 267 if (procs) 268 free(procs); 269 errx(1, "could not reallocate memory"); 270 } 271 procs = newprocs; 272 st = sysctl(mib, miblen, procs, &size, NULL, 0); 273 } while (st == -1 && errno == ENOMEM); 274 if (st == -1) 275 err(1, "could not sysctl(KERN_PROC)"); 276 if (size % sizeof(struct kinfo_proc) != 0) { 277 fprintf(stderr, "proc size mismatch (%d total, %d chunks)\n", 278 size, sizeof(struct kinfo_proc)); 279 fprintf(stderr, "userland out of sync with kernel, recompile libkvm etc\n"); 280 exit(1); 281 } 282 nprocs = size / sizeof(struct kinfo_proc); 283 if (dflag) 284 printf("nprocs %d\n", nprocs); 285 286 for (i = 0; i < nprocs; i++) { 287 thispid = procs[i].kp_proc.p_pid; 288 strncpy(thiscmd, procs[i].kp_proc.p_comm, MAXCOMLEN); 289 thiscmd[MAXCOMLEN] = '\0'; 290 thistdev = procs[i].kp_eproc.e_tdev; 291 thisuid = procs[i].kp_eproc.e_pcred.p_ruid; /* real uid */ 292 293 matched = 1; 294 if (user) { 295 if (thisuid != uid) 296 matched = 0; 297 } 298 if (tty) { 299 if (thistdev != tdev) 300 matched = 0; 301 } 302 if (cmd) { 303 if (mflag) { 304 if (regcomp(&rgx, cmd, 305 REG_EXTENDED|REG_NOSUB) != 0) { 306 mflag = 0; 307 warnx("%s: illegal regexp", cmd); 308 } 309 } 310 if (mflag) { 311 pmatch.rm_so = 0; 312 pmatch.rm_eo = strlen(thiscmd); 313 if (regexec(&rgx, thiscmd, 0, &pmatch, 314 REG_STARTEND) != 0) 315 matched = 0; 316 regfree(&rgx); 317 } else { 318 if (strcmp(thiscmd, cmd) != 0) 319 matched = 0; 320 } 321 } 322 if (matched == 0) 323 continue; 324 matched = 0; 325 for (j = 0; j < ac; j++) { 326 if (mflag) { 327 if (regcomp(&rgx, av[j], 328 REG_EXTENDED|REG_NOSUB) != 0) { 329 mflag = 0; 330 warnx("%s: illegal regexp", av[j]); 331 } 332 } 333 if (mflag) { 334 pmatch.rm_so = 0; 335 pmatch.rm_eo = strlen(thiscmd); 336 if (regexec(&rgx, thiscmd, 0, &pmatch, 337 REG_STARTEND) == 0) 338 matched = 1; 339 regfree(&rgx); 340 } else { 341 if (strcmp(thiscmd, av[j]) == 0) 342 matched = 1; 343 } 344 if (matched) 345 break; 346 } 347 if (matched == 0) 348 continue; 349 if (dflag) 350 printf("sig:%d, cmd:%s, pid:%d, dev:0x%x uid:%d\n", sig, 351 thiscmd, thispid, thistdev, thisuid); 352 353 if (vflag || sflag) 354 printf("kill -%s %d\n", upper(sys_signame[sig]), 355 thispid); 356 357 killed++; 358 if (!dflag && !sflag) { 359 if (kill(thispid, sig) < 0 /* && errno != ESRCH */ ) { 360 warn("kill -%s %d", upper(sys_signame[sig]), 361 thispid); 362 errors = 1; 363 } 364 } 365 } 366 if (killed == 0) { 367 fprintf(stderr, "No matching processes %swere found\n", 368 getuid() != 0 ? "belonging to you " : ""); 369 errors = 1; 370 } 371 exit(errors); 372} 373