libbb/u_signal_names.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Signal name/number conversion routines.
   4  *
   5  * Copyright 2006 Rob Landley <rob@landley.net>
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   8  */
   9
  10 #include "libbb.h"
  11
  12 static const struct signal_name {
  13         char name[5];
  14         int number;
  15 } signals[] = {
  16         // SUSv3 says kill must support these, and specifies the numerical values,
  17         // http://www.opengroup.org/onlinepubs/009695399/utilities/kill.html
  18         {"0", 0}, {"HUP", 1}, {"INT", 2}, {"QUIT", 3}, {"ABRT", 6}, {"KILL", 9},
  19         {"ALRM", 14}, {"TERM", 15},
  20         // And Posix adds the following:
  21         {"ILL", SIGILL}, {"TRAP", SIGTRAP}, {"FPE", SIGFPE}, {"USR1", SIGUSR1},
  22         {"SEGV", SIGSEGV}, {"USR2", SIGUSR2}, {"PIPE", SIGPIPE}, {"CHLD", SIGCHLD},
  23         {"CONT", SIGCONT}, {"STOP", SIGSTOP}, {"TSTP", SIGTSTP}, {"TTIN", SIGTTIN},
  24         {"TTOU", SIGTTOU}
  25 };
  26
  27 // Convert signal name to number.
  28
  29 int get_signum(const char *name)
  30 {
  31         int i;
  32
  33         i = atoi(name);
  34         if(i) return i;
  35         for(i=0; i < sizeof(signals) / sizeof(struct signal_name); i++)
  36                 if (!strcasecmp(signals[i].name, name) ||
  37                         (!strncasecmp(signals[i].name, "SIG", 3)
  38                                  && !strcasecmp(signals[i].name+3, signals[i].name)))
  39                                         return signals[i].number;
  40         return -1;
  41 }
  42
  43 // Convert signal number to name
  44
  45 const char *get_signame(int number)
  46 {
  47         int i;
  48         static char buf[8];
  49
  50         for (i=0; i < sizeof(signals) / sizeof(struct signal_name); i++) {
  51                 if (number == signals[i].number) {
  52                         return signals[i].name;
  53                 }
  54         }
  55
  56         itoa_to_buf(number, buf, 8);
  57         return buf;
  58 }