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annotate toys/lsb/killall.c @ 1154:f7b777035025 draft

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Add -s option, allow zero optargs for -l. (Suggested by Ashwini Sharma.)
author Rob Landley <rob@landley.net>
date Sun, 22 Dec 2013 19:39:12 -0600
parents a9374aa2631a
children d965dfbee154
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1 /* killall.c - Send signal (default: TERM) to all processes with given names.
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2 *
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3 * Copyright 2012 Andreas Heck <aheck@gmx.de>
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4 *
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5 * http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/killall.html
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6
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7 USE_KILLALL(NEWTOY(killall, "?s:lqvi", TOYFLAG_USR|TOYFLAG_BIN))
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8
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9 config KILLALL
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10 bool "killall"
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11 default y
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12 help
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13 usage: killall [-l] [-iqv] [-SIGNAL|-s SIGNAL] PROCESS_NAME...
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14
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15 Send a signal (default: TERM) to all processes with the given names.
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16
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17 -i ask for confirmation before killing
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18 -l print list of all available signals
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19 -q don't print any warnings or error messages
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20 -s send SIGNAL instead of SIGTERM
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21 -v report if the signal was successfully sent
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22 */
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23
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24 #define FOR_killall
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25 #include "toys.h"
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26
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27 GLOBALS(
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28 char *sig;
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29
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30 int signum;
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31 pid_t cur_pid;
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32 char **names;
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33 short *err;
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34 )
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35
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36 static int kill_process(pid_t pid, char *name)
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37 {
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38 int offset = 0;
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39
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40 if (pid == TT.cur_pid) return 0;
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41
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42 if (toys.optflags & FLAG_i) {
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43 sprintf(toybuf, "Signal %4000s(%d) ?", name, (int)pid);
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44 if (!yesno(toybuf, 0)) return 0;
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45 }
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46
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47 errno = 0;
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48 kill(pid, TT.signum);
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49 for (;;) {
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50 if (TT.names[offset] == name) {
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51 TT.err[offset] = errno;
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52 break;
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53 } else offset++;
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54 }
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55 if (errno) {
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56 if (!(toys.optflags & FLAG_q)) perror_msg("pid %d", (int)pid);
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57 } else if (toys.optflags & FLAG_v)
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58 printf("Killed %s(%d) with signal %d\n", name, pid, TT.signum);
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59
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60 return 0;
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61 }
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62
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63 void killall_main(void)
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64 {
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65 int i;
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66
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67 TT.names = toys.optargs;
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68 TT.signum = SIGTERM;
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69
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70 if (toys.optflags & FLAG_l) {
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71 sig_to_num(NULL);
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72 return;
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73 }
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74
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75 if (TT.sig || **TT.names == '-') {
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76 if (0 > (TT.signum = sig_to_num(TT.sig ? TT.sig : (*TT.names)+1))) {
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77 if (toys.optflags & FLAG_q) exit(1);
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78 error_exit("Invalid signal");
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79 }
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80 if (!TT.sig) {
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81 TT.names++;
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82 toys.optc--;
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83 }
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84 }
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86 if (!(toys.optflags & FLAG_l) && !toys.optc) {
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87 toys.exithelp++;
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88 error_exit("no name");
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89 }
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90
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91 TT.cur_pid = getpid();
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92
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93 TT.err = xmalloc(2*toys.optc);
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94 for (i=0; i<toys.optc; i++) TT.err[i] = ESRCH;
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95 names_to_pid(TT.names, kill_process);
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96 for (i=0; i<toys.optc; i++) {
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97 if (TT.err[i]) {
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98 toys.exitval = 1;
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99 errno = TT.err[i];
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100 perror_msg("%s", TT.names[i]);
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101 }
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102 }
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103 if (CFG_TOYBOX_FREE) free(TT.err);
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104 }