signame.c

   1 /* Convert between signal names and numbers.
   2 Copyright (C) 1990,92,93,95,96,99, 2002 Free Software Foundation, Inc.
   3 This file was part of the GNU C Library, but is now part of GNU make.
   4
   5 GNU Make is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 2, or (at your option)
   8 any later version.
   9
  10 GNU Make is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GNU Make; see the file COPYING.  If not, write to
  17 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18 Boston, MA 02111-1307, USA.  */
  19
  20 #include "make.h"
  21
  22 /* If the system provides strsignal, we don't need it. */
  23
  24 #if !defined(HAVE_STRSIGNAL)
  25
  26 /* If the system provides sys_siglist, we'll use that.
  27    Otherwise create our own.
  28  */
  29
  30 #if !defined(SYS_SIGLIST_DECLARED)
  31
  32 /* Some systems do not define NSIG in <signal.h>.  */
  33 #ifndef NSIG
  34 #ifdef  _NSIG
  35 #define NSIG    _NSIG
  36 #else
  37 #define NSIG    32
  38 #endif
  39 #endif
  40
  41 /* There is too much variation in Sys V signal numbers and names, so
  42    we must initialize them at runtime.  */
  43
  44 static const char *undoc;
  45
  46 static const char *sys_siglist[NSIG];
  47
  48 /* Table of abbreviations for signals.  Note:  A given number can
  49    appear more than once with different abbreviations.  */
  50 #define SIG_TABLE_SIZE  (NSIG*2)
  51
  52 typedef struct
  53   {
  54     int number;
  55     const char *abbrev;
  56   } num_abbrev;
  57
  58 static num_abbrev sig_table[SIG_TABLE_SIZE];
  59
  60 /* Number of elements of sig_table used.  */
  61 static int sig_table_nelts = 0;
  62
  63 /* Enter signal number NUMBER into the tables with ABBREV and NAME.  */
  64
  65 static void
  66 init_sig (int number, const char *abbrev, const char *name)
  67 {
  68   /* If this value is ever greater than NSIG it seems like it'd be a bug in
  69      the system headers, but... better safe than sorry.  We know, for
  70      example, that this isn't always true on VMS.  */
  71
  72   if (number >= 0 && number < NSIG)
  73     sys_siglist[number] = name;
  74
  75   if (sig_table_nelts < SIG_TABLE_SIZE)
  76     {
  77       sig_table[sig_table_nelts].number = number;
  78       sig_table[sig_table_nelts++].abbrev = abbrev;
  79     }
  80 }
  81
  82 static int
  83 signame_init (void)
  84 {
  85   int i;
  86
  87   undoc = xstrdup (_("unknown signal"));
  88
  89   /* Initialize signal names.  */
  90   for (i = 0; i < NSIG; i++)
  91     sys_siglist[i] = undoc;
  92
  93   /* Initialize signal names.  */
  94 #if defined (SIGHUP)
  95   init_sig (SIGHUP, "HUP", _("Hangup"));
  96 #endif
  97 #if defined (SIGINT)
  98   init_sig (SIGINT, "INT", _("Interrupt"));
  99 #endif
 100 #if defined (SIGQUIT)
 101   init_sig (SIGQUIT, "QUIT", _("Quit"));
 102 #endif
 103 #if defined (SIGILL)
 104   init_sig (SIGILL, "ILL", _("Illegal Instruction"));
 105 #endif
 106 #if defined (SIGTRAP)
 107   init_sig (SIGTRAP, "TRAP", _("Trace/breakpoint trap"));
 108 #endif
 109   /* If SIGIOT == SIGABRT, we want to print it as SIGABRT because
 110      SIGABRT is in ANSI and POSIX.1 and SIGIOT isn't.  */
 111 #if defined (SIGABRT)
 112   init_sig (SIGABRT, "ABRT", _("Aborted"));
 113 #endif
 114 #if defined (SIGIOT)
 115   init_sig (SIGIOT, "IOT", _("IOT trap"));
 116 #endif
 117 #if defined (SIGEMT)
 118   init_sig (SIGEMT, "EMT", _("EMT trap"));
 119 #endif
 120 #if defined (SIGFPE)
 121   init_sig (SIGFPE, "FPE", _("Floating point exception"));
 122 #endif
 123 #if defined (SIGKILL)
 124   init_sig (SIGKILL, "KILL", _("Killed"));
 125 #endif
 126 #if defined (SIGBUS)
 127   init_sig (SIGBUS, "BUS", _("Bus error"));
 128 #endif
 129 #if defined (SIGSEGV)
 130   init_sig (SIGSEGV, "SEGV", _("Segmentation fault"));
 131 #endif
 132 #if defined (SIGSYS)
 133   init_sig (SIGSYS, "SYS", _("Bad system call"));
 134 #endif
 135 #if defined (SIGPIPE)
 136   init_sig (SIGPIPE, "PIPE", _("Broken pipe"));
 137 #endif
 138 #if defined (SIGALRM)
 139   init_sig (SIGALRM, "ALRM", _("Alarm clock"));
 140 #endif
 141 #if defined (SIGTERM)
 142   init_sig (SIGTERM, "TERM", _("Terminated"));
 143 #endif
 144 #if defined (SIGUSR1)
 145   init_sig (SIGUSR1, "USR1", _("User defined signal 1"));
 146 #endif
 147 #if defined (SIGUSR2)
 148   init_sig (SIGUSR2, "USR2", _("User defined signal 2"));
 149 #endif
 150   /* If SIGCLD == SIGCHLD, we want to print it as SIGCHLD because that
 151      is what is in POSIX.1.  */
 152 #if defined (SIGCHLD)
 153   init_sig (SIGCHLD, "CHLD", _("Child exited"));
 154 #endif
 155 #if defined (SIGCLD)
 156   init_sig (SIGCLD, "CLD", _("Child exited"));
 157 #endif
 158 #if defined (SIGPWR)
 159   init_sig (SIGPWR, "PWR", _("Power failure"));
 160 #endif
 161 #if defined (SIGTSTP)
 162   init_sig (SIGTSTP, "TSTP", _("Stopped"));
 163 #endif
 164 #if defined (SIGTTIN)
 165   init_sig (SIGTTIN, "TTIN", _("Stopped (tty input)"));
 166 #endif
 167 #if defined (SIGTTOU)
 168   init_sig (SIGTTOU, "TTOU", _("Stopped (tty output)"));
 169 #endif
 170 #if defined (SIGSTOP)
 171   init_sig (SIGSTOP, "STOP", _("Stopped (signal)"));
 172 #endif
 173 #if defined (SIGXCPU)
 174   init_sig (SIGXCPU, "XCPU", _("CPU time limit exceeded"));
 175 #endif
 176 #if defined (SIGXFSZ)
 177   init_sig (SIGXFSZ, "XFSZ", _("File size limit exceeded"));
 178 #endif
 179 #if defined (SIGVTALRM)
 180   init_sig (SIGVTALRM, "VTALRM", _("Virtual timer expired"));
 181 #endif
 182 #if defined (SIGPROF)
 183   init_sig (SIGPROF, "PROF", _("Profiling timer expired"));
 184 #endif
 185 #if defined (SIGWINCH)
 186   /* "Window size changed" might be more accurate, but even if that
 187      is all that it means now, perhaps in the future it will be
 188      extended to cover other kinds of window changes.  */
 189   init_sig (SIGWINCH, "WINCH", _("Window changed"));
 190 #endif
 191 #if defined (SIGCONT)
 192   init_sig (SIGCONT, "CONT", _("Continued"));
 193 #endif
 194 #if defined (SIGURG)
 195   init_sig (SIGURG, "URG", _("Urgent I/O condition"));
 196 #endif
 197 #if defined (SIGIO)
 198   /* "I/O pending" has also been suggested.  A disadvantage is
 199      that signal only happens when the process has
 200      asked for it, not everytime I/O is pending.  Another disadvantage
 201      is the confusion from giving it a different name than under Unix.  */
 202   init_sig (SIGIO, "IO", _("I/O possible"));
 203 #endif
 204 #if defined (SIGWIND)
 205   init_sig (SIGWIND, "WIND", _("SIGWIND"));
 206 #endif
 207 #if defined (SIGPHONE)
 208   init_sig (SIGPHONE, "PHONE", _("SIGPHONE"));
 209 #endif
 210 #if defined (SIGPOLL)
 211   init_sig (SIGPOLL, "POLL", _("I/O possible"));
 212 #endif
 213 #if defined (SIGLOST)
 214   init_sig (SIGLOST, "LOST", _("Resource lost"));
 215 #endif
 216 #if defined (SIGDANGER)
 217   init_sig (SIGDANGER, "DANGER", _("Danger signal"));
 218 #endif
 219 #if defined (SIGINFO)
 220   init_sig (SIGINFO, "INFO", _("Information request"));
 221 #endif
 222 #if defined (SIGNOFP)
 223   init_sig (SIGNOFP, "NOFP", _("Floating point co-processor not available"));
 224 #endif
 225
 226   return 1;
 227 }
 228
 229 #endif  /* SYS_SIGLIST_DECLARED */
 230
 231
 232 char *
 233 strsignal (int signal)
 234 {
 235   static char buf[] = "Signal 12345678901234567890";
 236
 237 #if !defined(SYS_SIGLIST_DECLARED)
 238   static char sig_initted = 0;
 239
 240   if (!sig_initted)
 241     sig_initted = signame_init ();
 242 #endif
 243
 244   if (signal > 0 || signal < NSIG)
 245     return (char *) sys_siglist[signal];
 246
 247   sprintf (buf, "Signal %d", signal);
 248   return buf;
 249 }
 250
 251 #endif  /* HAVE_STRSIGNAL */