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) 1999-2003 by Erik Andersen <andersen@codepoet.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 #define KILL 0
  36 #define KILLALL 1
  37
  38 extern int kill_main(int argc, char **argv)
  39 {
  40         int whichApp, signo = SIGTERM, quiet = 0;
  41         const char *name;
  42         int errors = 0;
  43
  44 #ifdef CONFIG_KILLALL
  45         /* Figure out what we are trying to do here */
  46         whichApp = (strcmp(bb_applet_name, "killall") == 0)? KILLALL : KILL;
  47 #else
  48         whichApp = KILL;
  49 #endif
  50
  51         /* Parse any options */
  52         if (argc < 2)
  53                 bb_show_usage();
  54
  55         if(argv[1][0] != '-'){
  56                 argv++;
  57                 argc--;
  58                 goto do_it_now;
  59         }
  60
  61         /* The -l option, which prints out signal names. */
  62         if(argv[1][1]=='l' && argv[1][2]=='\0'){
  63                 if(argc==2) {
  64                         /* Print the whole signal list */
  65                         int col = 0;
  66                         for(signo=1; signo < NSIG; signo++) {
  67                                 name = u_signal_names(0, &signo, 1);
  68                                 if(name==NULL)  /* unnamed */
  69                                         continue;
  70                                 col += printf("%2d) %-16s", signo, name);
  71                                 if (col > 60) {
  72                                         printf("\n");
  73                                         col = 0;
  74                                 }
  75                         }
  76                         printf("\n");
  77
  78                 } else {
  79                         for(argv++; *argv; argv++) {
  80                                 name = u_signal_names(*argv, &signo, -1);
  81                                 if(name!=NULL)
  82                                         printf("%s\n", name);
  83                         }
  84                 }
  85                 /* If they specified -l, were all done */
  86                 return EXIT_SUCCESS;
  87         }
  88
  89         /* The -q quiet option */
  90         if(argv[1][1]=='q' && argv[1][2]=='\0'){
  91                 quiet++;
  92                 argv++;
  93                 argc--;
  94                 if(argc<2 || argv[1][0] != '-'){
  95                         goto do_it_now;
  96                 }
  97         }
  98
  99         if(!u_signal_names(argv[1]+1, &signo, 0))
 100                 bb_error_msg_and_die( "bad signal name '%s'", argv[1]+1);
 101         argv+=2;
 102         argc-=2;
 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                                 bb_error_msg_and_die( "Bad PID '%s'", *argv);
 113                         pid = strtol(*argv, NULL, 0);
 114                         if (kill(pid, signo) != 0) {
 115                                 bb_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 || *pidList<=0) {
 131                                 errors++;
 132                                 if (quiet==0)
 133                                         bb_error_msg( "%s: no process killed", *argv);
 134                         } else {
 135                                 long *pl;
 136
 137                                 for(pl = pidList; *pl !=0 ; pl++) {
 138                                         if (*pl==myPid)
 139                                                 continue;
 140                                         if (kill(*pl, signo) != 0) {
 141                                                 errors++;
 142                                                 if (quiet==0)
 143                                                         bb_perror_msg( "Could not kill pid '%ld'", *pl);
 144                                         }
 145                                 }
 146                         }
 147                         free(pidList);
 148                         argv++;
 149                 }
 150         }
 151 #endif
 152         return errors;
 153 }