kill.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini kill/killall implementation for busybox
   4  *
   5  * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  *
  21  */
  22
  23
  24 #include "internal.h"
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <errno.h>
  28 #include <unistd.h>
  29 #include <signal.h>
  30 #include <ctype.h>
  31 #include <sys/stat.h>
  32 #include <unistd.h>
  33
  34 #define KILL    0
  35 #define KILLALL 1
  36
  37 struct signal_name {
  38         const char *name;
  39         int number;
  40 };
  41
  42 const struct signal_name signames[] = {
  43         /* Everything, order not important */
  44         {"HUP", SIGHUP},
  45         {"INT", SIGINT},
  46         {"QUIT", SIGQUIT},
  47         {"ILL", SIGILL},
  48         {"TRAP", SIGTRAP},
  49         {"ABRT", SIGABRT},
  50         {"FPE", SIGFPE},
  51         {"KILL", SIGKILL},
  52         {"SEGV", SIGSEGV},
  53         {"PIPE", SIGPIPE},
  54         {"ALRM", SIGALRM},
  55         {"TERM", SIGTERM},
  56         {"BUS", SIGBUS},
  57         {"USR1", SIGUSR1},
  58         {"USR2", SIGUSR2},
  59         {"STOP", SIGSTOP},
  60         {"CONT", SIGCONT},
  61         {"TTIN", SIGTTIN},
  62         {"TTOU", SIGTTOU},
  63         {"IO", SIGIO},
  64         {"TSTP", SIGTSTP},
  65         {"CHLD", SIGCHLD},
  66         {"XCPU", SIGXCPU},
  67         {"XFSZ", SIGXFSZ},
  68         {"PROF", SIGPROF},
  69         {"WINCH", SIGWINCH},
  70         {"URG", SIGURG},
  71         {"VTALRM", SIGVTALRM},
  72 #ifndef __alpha__
  73         /* everything except alpha */
  74         {"IOT", SIGIOT},
  75         {"POLL", SIGPOLL},
  76 #endif
  77 #if defined(__sparc__) || defined(__alpha__) || defined(__mips__)
  78         /* everthing except intel */
  79         {"EMT", SIGEMT},
  80         {"SYS", SIGSYS},
  81 # ifdef __alpha__
  82                 /* alpha only */
  83                 {"LOST", SIGLOST},
  84 #endif
  85 #ifdef __sparc__
  86                 /* space only */
  87                 {"INFO", SIGINFO},
  88 #endif
  89 #ifdef __mips__
  90                 /* mips only */
  91                 {"CLD", SIGCLD},
  92                 {"PWR", SIGPWR},
  93 #endif
  94 #else
  95         /* intel only */
  96         {"STKFLT", SIGSTKFLT},
  97         {"PWR", SIGPWR},
  98         {"UNUSED", SIGUNUSED},
  99 #endif
 100         {0, 0}
 101 };
 102
 103 extern int kill_main(int argc, char **argv)
 104 {
 105         int whichApp, sig = SIGTERM;
 106         const char *appUsage;
 107
 108 #ifdef BB_KILLALL
 109         /* Figure out what we are trying to do here */
 110         whichApp = (strcmp(applet_name, "killall") == 0)? KILLALL : KILL;
 111         appUsage = (whichApp == KILLALL)?  killall_usage : kill_usage;
 112 #else
 113         whichApp = KILL;
 114         appUsage = kill_usage;
 115 #endif
 116
 117         argc--;
 118         argv++;
 119         /* Parse any options */
 120         if (argc < 1)
 121                 usage(appUsage);
 122
 123         while (argc > 0 && **argv == '-') {
 124                 while (*++(*argv)) {
 125                         switch (**argv) {
 126                         case 'l':
 127                                 {
 128                                         int col = 0;
 129                                         const struct signal_name *s = signames;
 130
 131                                         while (s->name != 0) {
 132                                                 col +=
 133                                                         fprintf(stderr, "%2d) %-8s", s->number,
 134                                                                         (s++)->name);
 135                                                 if (col > 60) {
 136                                                         fprintf(stderr, "\n");
 137                                                         col = 0;
 138                                                 }
 139                                         }
 140                                         fprintf(stderr, "\n\n");
 141                                         exit(TRUE);
 142                                 }
 143                                 break;
 144                         case '-':
 145                                 usage(appUsage);
 146                         default:
 147                                 {
 148                                         if (isdigit(**argv)) {
 149                                                 sig = atoi(*argv);
 150                                                 if (sig < 0 || sig >= NSIG)
 151                                                         goto end;
 152                                                 else {
 153                                                         argc--;
 154                                                         argv++;
 155                                                         goto do_it_now;
 156                                                 }
 157                                         } else {
 158                                                 const struct signal_name *s = signames;
 159
 160                                                 while (s->name != 0) {
 161                                                         if (strcasecmp(s->name, *argv) == 0) {
 162                                                                 sig = s->number;
 163                                                                 argc--;
 164                                                                 argv++;
 165                                                                 goto do_it_now;
 166                                                         }
 167                                                         s++;
 168                                                 }
 169                                                 if (s->name == 0)
 170                                                         goto end;
 171                                         }
 172                                 }
 173                         }
 174                         argc--;
 175                         argv++;
 176                 }
 177         }
 178
 179   do_it_now:
 180
 181         if (whichApp == KILL) {
 182                 /* Looks like they want to do a kill. Do that */
 183                 while (--argc >= 0) {
 184                         int pid;
 185
 186                         if (!isdigit(**argv))
 187                                 fatalError( "Bad PID: %s\n", strerror(errno));
 188                         pid = strtol(*argv, NULL, 0);
 189                         if (kill(pid, sig) != 0)
 190                                 fatalError( "Could not kill pid '%d': %s\n", pid, strerror(errno));
 191                         argv++;
 192                 }
 193         }
 194 #ifdef BB_KILLALL
 195         else {
 196                 int all_found = TRUE;
 197                 pid_t myPid=getpid();
 198                 /* Looks like they want to do a killall.  Do that */
 199                 while (--argc >= 0) {
 200                         pid_t* pidList;
 201
 202                         pidList = findPidByName( *argv);
 203                         if (!pidList) {
 204                                 all_found = FALSE;
 205                                 errorMsg( "%s: no process killed\n", *argv);
 206                         }
 207
 208                         for(; pidList && *pidList!=0; pidList++) {
 209                                 if (*pidList==myPid)
 210                                         continue;
 211                                 if (kill(*pidList, sig) != 0)
 212                                         fatalError( "Could not kill pid '%d': %s\n", *pidList, strerror(errno));
 213                         }
 214                         /* Note that we don't bother to free the memory
 215                          * allocated in findPidByName().  It will be freed
 216                          * upon exit, so we can save a byte or two */
 217                         argv++;
 218                 }
 219                 exit (all_found);
 220         }
 221 #endif
 222
 223         exit(TRUE);
 224
 225
 226   end:
 227         fatalError( "bad signal name: %s\n", *argv);
 228 }