procps/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  * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  *
  22  */
  23
  24
  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 <string.h>
  32 #include <unistd.h>
  33 #include "busybox.h"
  34
  35 static const int KILL = 0;
  36 static const int KILLALL = 1;
  37
  38
  39 extern int kill_main(int argc, char **argv)
  40 {
  41         int whichApp, sig = SIGTERM, quiet;
  42         const char *name;
  43
  44 #ifdef CONFIG_KILLALL
  45         /* Figure out what we are trying to do here */
  46         whichApp = (strcmp(applet_name, "killall") == 0)? KILLALL : KILL;
  47 #else
  48         whichApp = KILL;
  49 #endif
  50
  51         quiet=0;
  52         argc--;
  53         argv++;
  54         /* Parse any options */
  55         if (argc < 1)
  56                 show_usage();
  57
  58         while (argc > 0 && **argv == '-') {
  59                 while (*++(*argv)) {
  60                         switch (**argv) {
  61 #ifdef CONFIG_KILLALL
  62                                 case 'q':
  63                                         quiet++;
  64                                         break;
  65 #endif
  66                                 case 'l':
  67                                         if(argc>1) {
  68                                                 for(argv++; *argv; argv++) {
  69                                                         name = u_signal_names(*argv, &sig, -1);
  70                                                         if(name!=NULL)
  71                                                                 printf("%s\n", name);
  72                                                 }
  73                                         } else {
  74                                                 int col = 0;
  75                                                 for(sig=1; sig < NSIG; sig++) {
  76                                                         name = u_signal_names(0, &sig, 1);
  77                                                         if(name==NULL)  /* unnamed */
  78                                                                 continue;
  79                                                         col += printf("%2d) %-16s", sig, name);
  80                                                         if (col > 60) {
  81                                                                 printf("\n");
  82                                                                 col = 0;
  83                                                         }
  84                                                 }
  85                                                 printf("\n");
  86                                         }
  87                                         return EXIT_SUCCESS;
  88                                 case '-':
  89                                         show_usage();
  90                                 default:
  91                                         name = u_signal_names(*argv, &sig, 0);
  92                                         if(name==NULL)
  93                                                 error_msg_and_die( "bad signal name: %s", *argv);
  94                                         argc--;
  95                                         argv++;
  96                                         goto do_it_now;
  97                         }
  98                         argc--;
  99                         argv++;
 100                 }
 101         }
 102
 103 do_it_now:
 104
 105         if (whichApp == KILL) {
 106                 /* Looks like they want to do a kill. Do that */
 107                 while (--argc >= 0) {
 108                         int pid;
 109
 110                         if (!isdigit(**argv))
 111                                 perror_msg_and_die( "Bad PID");
 112                         pid = strtol(*argv, NULL, 0);
 113                         if (kill(pid, sig) != 0) {
 114                                 perror_msg_and_die( "Could not kill pid '%d'", pid);
 115                         }
 116                         argv++;
 117                 }
 118         }
 119 #ifdef CONFIG_KILLALL
 120         else {
 121                 int all_found = TRUE;
 122                 pid_t myPid=getpid();
 123                 /* Looks like they want to do a killall.  Do that */
 124                 while (--argc >= 0) {
 125                         long* pidList;
 126
 127                         pidList = find_pid_by_name( *argv);
 128                         if (!pidList || *pidList<=0) {
 129                                 all_found = FALSE;
 130                                 if (quiet) {
 131                                         exit(EXIT_FAILURE);
 132                                 } else {
 133                                         error_msg_and_die( "%s: no process killed", *argv);
 134                                 }
 135                         }
 136
 137                         for(; pidList && *pidList!=0; pidList++) {
 138                                 if (*pidList==myPid)
 139                                         continue;
 140                                 if (kill(*pidList, sig) != 0) {
 141                                         if (quiet) {
 142                                                 exit(EXIT_FAILURE);
 143                                         } else {
 144                                                 perror_msg_and_die( "Could not kill pid '%d'", *pidList);
 145                                         }
 146                                 }
 147                         }
 148                         /* Note that we don't bother to free the memory
 149                          * allocated in find_pid_by_name().  It will be freed
 150                          * upon exit, so we can save a byte or two */
 151                         argv++;
 152                 }
 153                 if (! all_found)
 154                         return EXIT_FAILURE;
 155         }
 156 #endif
 157
 158         return EXIT_SUCCESS;
 159 }