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         int errors = 0;
  44
  45 #ifdef CONFIG_KILLALL
  46         /* Figure out what we are trying to do here */
  47         whichApp = (strcmp(applet_name, "killall") == 0)? KILLALL : KILL;
  48 #else
  49         whichApp = KILL;
  50 #endif
  51
  52         quiet=0;
  53         argc--;
  54         argv++;
  55         /* Parse any options */
  56         if (argc < 1)
  57                 show_usage();
  58
  59         while (argc > 0 && **argv == '-') {
  60                 while (*++(*argv)) {
  61                         switch (**argv) {
  62 #ifdef CONFIG_KILLALL
  63                                 case 'q':
  64                                         quiet++;
  65                                         break;
  66 #endif
  67                                 case 'l':
  68                                         if(argc>1) {
  69                                                 for(argv++; *argv; argv++) {
  70                                                         name = u_signal_names(*argv, &sig, -1);
  71                                                         if(name!=NULL)
  72                                                                 printf("%s\n", name);
  73                                                 }
  74                                         } else {
  75                                                 int col = 0;
  76                                                 for(sig=1; sig < NSIG; sig++) {
  77                                                         name = u_signal_names(0, &sig, 1);
  78                                                         if(name==NULL)  /* unnamed */
  79                                                                 continue;
  80                                                         col += printf("%2d) %-16s", sig, name);
  81                                                         if (col > 60) {
  82                                                                 printf("\n");
  83                                                                 col = 0;
  84                                                         }
  85                                                 }
  86                                                 printf("\n");
  87                                         }
  88                                         return EXIT_SUCCESS;
  89                                 case '-':
  90                                         show_usage();
  91                                 default:
  92                                         name = u_signal_names(*argv, &sig, 0);
  93                                         if(name==NULL)
  94                                                 error_msg_and_die( "bad signal name: %s", *argv);
  95                                         argc--;
  96                                         argv++;
  97                                         goto do_it_now;
  98                         }
  99                         argc--;
 100                         argv++;
 101                 }
 102         }
 103
 104 do_it_now:
 105
 106         if (whichApp == KILL) {
 107                 /* Looks like they want to do a kill. Do that */
 108                 while (--argc >= 0) {
 109                         int pid;
 110
 111                         if (!isdigit(**argv))
 112                                 perror_msg_and_die( "Bad PID");
 113                         pid = strtol(*argv, NULL, 0);
 114                         if (kill(pid, sig) != 0) {
 115                                 perror_msg( "Could not kill pid '%d'", pid);
 116                                 errors++;
 117                         }
 118                         argv++;
 119                 }
 120
 121         }
 122 #ifdef CONFIG_KILLALL
 123         else {
 124                 pid_t myPid=getpid();
 125                 /* Looks like they want to do a killall.  Do that */
 126                 while (--argc >= 0) {
 127                         long* pidList;
 128
 129                         pidList = find_pid_by_name(*argv);
 130                         if (*pidList <= 0) {
 131                                 errors++;
 132                                 if (quiet==0)
 133                                         error_msg( "%s: no process killed", *argv);
 134                                 } else {
 135                             for(; *pidList!=0; pidList++) {
 136                                 if (*pidList==myPid)
 137                                         continue;
 138                                 if (kill(*pidList, sig) != 0) {
 139                                         errors++;
 140                                         if (quiet==0)
 141                                                 perror_msg( "Could not kill pid '%d'", *pidList);
 142                                         }
 143                                 }
 144                         }
 145                         free(pidList);
 146                         argv++;
 147                 }
 148         }
 149 #endif
 150         return errors;
 151 }