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 <stdio.h>
  25 #include <stdlib.h>
  26 #include <errno.h>
  27 #include <unistd.h>
  28 #include <signal.h>
  29 #include <ctype.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32 #include "busybox.h"
  33
  34 static const int KILL = 0;
  35 static const int KILLALL = 1;
  36
  37
  38 extern int kill_main(int argc, char **argv)
  39 {
  40         int whichApp, sig = SIGTERM;
  41         const char *name;
  42
  43 #ifdef BB_KILLALL
  44         /* Figure out what we are trying to do here */
  45         whichApp = (strcmp(applet_name, "killall") == 0)? KILLALL : KILL;
  46 #else
  47         whichApp = KILL;
  48 #endif
  49
  50         argc--;
  51         argv++;
  52         /* Parse any options */
  53         if (argc < 1)
  54                 show_usage();
  55
  56         while (argc > 0 && **argv == '-') {
  57                 while (*++(*argv)) {
  58                         switch (**argv) {
  59                         case 'l':
  60                                 if(argc>1) {
  61                                         for(argv++; *argv; argv++) {
  62                                                 name = u_signal_names(*argv, &sig, -1);
  63                                                 if(name!=NULL)
  64                                                         printf("%s\n", name);
  65                                         }
  66                                 } else {
  67                                         int col = 0;
  68                                         for(sig=1; sig < NSIG; sig++) {
  69                                                 name = u_signal_names(0, &sig, 1);
  70                                                 if(name==NULL)  /* unnamed */
  71                                                         continue;
  72                                                 col += printf("%2d) %-16s", sig, name);
  73                                                 if (col > 60) {
  74                                                         printf("\n");
  75                                                         col = 0;
  76                                                 }
  77                                         }
  78                                         printf("\n");
  79                                 }
  80                                 return EXIT_SUCCESS;
  81                         case '-':
  82                                 show_usage();
  83                         default:
  84                                 name = u_signal_names(*argv, &sig, 0);
  85                                 if(name==NULL)
  86                                         error_msg_and_die( "bad signal name: %s", *argv);
  87                                                                 argc--;
  88                                                                 argv++;
  89                                                                 goto do_it_now;
  90                                                         }
  91                         argc--;
  92                         argv++;
  93                 }
  94         }
  95
  96   do_it_now:
  97
  98         if (whichApp == KILL) {
  99                 /* Looks like they want to do a kill. Do that */
 100                 while (--argc >= 0) {
 101                         int pid;
 102
 103                         if (!isdigit(**argv))
 104                                 perror_msg_and_die( "Bad PID");
 105                         pid = strtol(*argv, NULL, 0);
 106                         if (kill(pid, sig) != 0)
 107                                 perror_msg_and_die( "Could not kill pid '%d'", pid);
 108                         argv++;
 109                 }
 110         }
 111 #ifdef BB_KILLALL
 112         else {
 113                 int all_found = TRUE;
 114                 pid_t myPid=getpid();
 115                 /* Looks like they want to do a killall.  Do that */
 116                 while (--argc >= 0) {
 117                         pid_t* pidList;
 118
 119                         pidList = find_pid_by_name( *argv);
 120                         if (!pidList || *pidList<=0) {
 121                                 all_found = FALSE;
 122                                 error_msg_and_die( "%s: no process killed", *argv);
 123                         }
 124
 125                         for(; pidList && *pidList!=0; pidList++) {
 126                                 if (*pidList==myPid)
 127                                         continue;
 128                                 if (kill(*pidList, sig) != 0)
 129                                         perror_msg_and_die( "Could not kill pid '%d'", *pidList);
 130                         }
 131                         /* Note that we don't bother to free the memory
 132                          * allocated in find_pid_by_name().  It will be freed
 133                          * upon exit, so we can save a byte or two */
 134                         argv++;
 135                 }
 136                 if (all_found == FALSE)
 137                         return EXIT_FAILURE;
 138         }
 139 #endif
 140
 141         return EXIT_SUCCESS;
 142 }