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) 1999-2004 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;
  41         const char *name;
  42         int errors = 0;
  43
  44 #ifdef CONFIG_KILLALL
  45         int quiet=0;
  46         /* Figure out what we are trying to do here */
  47         whichApp = (strcmp(bb_applet_name, "killall") == 0)? KILLALL : KILL;
  48 #else
  49         whichApp = KILL;
  50 #endif
  51
  52         /* Parse any options */
  53         if (argc < 2)
  54                 bb_show_usage();
  55
  56         if(argv[1][0] != '-'){
  57                 argv++;
  58                 argc--;
  59                 goto do_it_now;
  60         }
  61
  62         /* The -l option, which prints out signal names. */
  63         if(argv[1][1]=='l' && argv[1][2]=='\0'){
  64                 if(argc==2) {
  65                         /* Print the whole signal list */
  66                         int col = 0;
  67                         for(signo=1; signo < NSIG; signo++) {
  68                                 name = u_signal_names(0, &signo, 1);
  69                                 if(name==NULL)  /* unnamed */
  70                                         continue;
  71                                 col += printf("%2d) %-16s", signo, name);
  72                                 if (col > 60) {
  73                                         printf("\n");
  74                                         col = 0;
  75                                 }
  76                         }
  77                         printf("\n");
  78
  79                 } else {
  80                         for(argv++; *argv; argv++) {
  81                                 name = u_signal_names(*argv, &signo, -1);
  82                                 if(name!=NULL)
  83                                         printf("%s\n", name);
  84                         }
  85                 }
  86                 /* If they specified -l, were all done */
  87                 return EXIT_SUCCESS;
  88         }
  89
  90 #ifdef CONFIG_KILLALL
  91         /* The -q quiet option */
  92         if(whichApp != KILL && argv[1][1]=='q' && argv[1][2]=='\0'){
  93                 quiet++;
  94                 argv++;
  95                 argc--;
  96                 if(argc<2 || argv[1][0] != '-'){
  97                         goto do_it_now;
  98                 }
  99         }
 100 #endif
 101
 102         if(!u_signal_names(argv[1]+1, &signo, 0))
 103                 bb_error_msg_and_die( "bad signal name '%s'", argv[1]+1);
 104         argv+=2;
 105         argc-=2;
 106
 107 do_it_now:
 108
 109         /* Pid or name required */
 110         if (argc <= 0)
 111                 bb_show_usage();
 112
 113         if (whichApp == KILL) {
 114                 /* Looks like they want to do a kill. Do that */
 115                 while (--argc >= 0) {
 116                         int pid;
 117
 118                         if (!isdigit(**argv) && **argv != '-')
 119                                 bb_error_msg_and_die( "Bad PID '%s'", *argv);
 120                         pid = strtol(*argv, NULL, 0);
 121                         if (kill(pid, signo) != 0) {
 122                                 bb_perror_msg( "Could not kill pid '%d'", pid);
 123                                 errors++;
 124                         }
 125                         argv++;
 126                 }
 127
 128         }
 129 #ifdef CONFIG_KILLALL
 130         else {
 131                 pid_t myPid=getpid();
 132                 /* Looks like they want to do a killall.  Do that */
 133                 while (--argc >= 0) {
 134                         long* pidList;
 135
 136                         pidList = find_pid_by_name(*argv);
 137                         if (!pidList || *pidList<=0) {
 138                                 errors++;
 139                                 if (quiet==0)
 140                                         bb_error_msg( "%s: no process killed", *argv);
 141                         } else {
 142                                 long *pl;
 143
 144                                 for(pl = pidList; *pl !=0 ; pl++) {
 145                                         if (*pl==myPid)
 146                                                 continue;
 147                                         if (kill(*pl, signo) != 0) {
 148                                                 errors++;
 149                                                 if (quiet==0)
 150                                                         bb_perror_msg( "Could not kill pid '%ld'", *pl);
 151                                         }
 152                                 }
 153                         }
 154                         free(pidList);
 155                         argv++;
 156                 }
 157         }
 158 #endif
 159         return errors;
 160 }