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 (number, abbrev, name)
  67      int number;
  68      const char *abbrev;
  69      const char *name;
  70 {
  71   /* If this value is ever greater than NSIG it seems like it'd be a bug in
  72      the system headers, but... better safe than sorry.  We know, for
  73      example, that this isn't always true on VMS.  */
  74
  75   if (number >= 0 && number < NSIG)
  76     sys_siglist[number] = name;
  77
  78   if (sig_table_nelts < SIG_TABLE_SIZE)
  79     {
  80       sig_table[sig_table_nelts].number = number;
  81       sig_table[sig_table_nelts++].abbrev = abbrev;
  82     }
  83 }
  84
  85 static int
  86 signame_init ()
  87 {
  88   int i;
  89   char *u = _("unknown signal");
  90
  91   undoc = xstrdup(u);
  92
  93   /* Initialize signal names.  */
  94   for (i = 0; i < NSIG; i++)
  95     sys_siglist[i] = undoc;
  96
  97   /* Initialize signal names.  */
  98 #if defined (SIGHUP)
  99   init_sig (SIGHUP, "HUP", _("Hangup"));
 100 #endif
 101 #if defined (SIGINT)
 102   init_sig (SIGINT, "INT", _("Interrupt"));
 103 #endif
 104 #if defined (SIGQUIT)
 105   init_sig (SIGQUIT, "QUIT", _("Quit"));
 106 #endif
 107 #if defined (SIGILL)
 108   init_sig (SIGILL, "ILL", _("Illegal Instruction"));
 109 #endif
 110 #if defined (SIGTRAP)
 111   init_sig (SIGTRAP, "TRAP", _("Trace/breakpoint trap"));
 112 #endif
 113   /* If SIGIOT == SIGABRT, we want to print it as SIGABRT because
 114      SIGABRT is in ANSI and POSIX.1 and SIGIOT isn't.  */
 115 #if defined (SIGABRT)
 116   init_sig (SIGABRT, "ABRT", _("Aborted"));
 117 #endif
 118 #if defined (SIGIOT)
 119   init_sig (SIGIOT, "IOT", _("IOT trap"));
 120 #endif
 121 #if defined (SIGEMT)
 122   init_sig (SIGEMT, "EMT", _("EMT trap"));
 123 #endif
 124 #if defined (SIGFPE)
 125   init_sig (SIGFPE, "FPE", _("Floating point exception"));
 126 #endif
 127 #if defined (SIGKILL)
 128   init_sig (SIGKILL, "KILL", _("Killed"));
 129 #endif
 130 #if defined (SIGBUS)
 131   init_sig (SIGBUS, "BUS", _("Bus error"));
 132 #endif
 133 #if defined (SIGSEGV)
 134   init_sig (SIGSEGV, "SEGV", _("Segmentation fault"));
 135 #endif
 136 #if defined (SIGSYS)
 137   init_sig (SIGSYS, "SYS", _("Bad system call"));
 138 #endif
 139 #if defined (SIGPIPE)
 140   init_sig (SIGPIPE, "PIPE", _("Broken pipe"));
 141 #endif
 142 #if defined (SIGALRM)
 143   init_sig (SIGALRM, "ALRM", _("Alarm clock"));
 144 #endif
 145 #if defined (SIGTERM)
 146   init_sig (SIGTERM, "TERM", _("Terminated"));
 147 #endif
 148 #if defined (SIGUSR1)
 149   init_sig (SIGUSR1, "USR1", _("User defined signal 1"));
 150 #endif
 151 #if defined (SIGUSR2)
 152   init_sig (SIGUSR2, "USR2", _("User defined signal 2"));
 153 #endif
 154   /* If SIGCLD == SIGCHLD, we want to print it as SIGCHLD because that
 155      is what is in POSIX.1.  */
 156 #if defined (SIGCHLD)
 157   init_sig (SIGCHLD, "CHLD", _("Child exited"));
 158 #endif
 159 #if defined (SIGCLD)
 160   init_sig (SIGCLD, "CLD", _("Child exited"));
 161 #endif
 162 #if defined (SIGPWR)
 163   init_sig (SIGPWR, "PWR", _("Power failure"));
 164 #endif
 165 #if defined (SIGTSTP)
 166   init_sig (SIGTSTP, "TSTP", _("Stopped"));
 167 #endif
 168 #if defined (SIGTTIN)
 169   init_sig (SIGTTIN, "TTIN", _("Stopped (tty input)"));
 170 #endif
 171 #if defined (SIGTTOU)
 172   init_sig (SIGTTOU, "TTOU", _("Stopped (tty output)"));
 173 #endif
 174 #if defined (SIGSTOP)
 175   init_sig (SIGSTOP, "STOP", _("Stopped (signal)"));
 176 #endif
 177 #if defined (SIGXCPU)
 178   init_sig (SIGXCPU, "XCPU", _("CPU time limit exceeded"));
 179 #endif
 180 #if defined (SIGXFSZ)
 181   init_sig (SIGXFSZ, "XFSZ", _("File size limit exceeded"));
 182 #endif
 183 #if defined (SIGVTALRM)
 184   init_sig (SIGVTALRM, "VTALRM", _("Virtual timer expired"));
 185 #endif
 186 #if defined (SIGPROF)
 187   init_sig (SIGPROF, "PROF", _("Profiling timer expired"));
 188 #endif
 189 #if defined (SIGWINCH)
 190   /* "Window size changed" might be more accurate, but even if that
 191      is all that it means now, perhaps in the future it will be
 192      extended to cover other kinds of window changes.  */
 193   init_sig (SIGWINCH, "WINCH", _("Window changed"));
 194 #endif
 195 #if defined (SIGCONT)
 196   init_sig (SIGCONT, "CONT", _("Continued"));
 197 #endif
 198 #if defined (SIGURG)
 199   init_sig (SIGURG, "URG", _("Urgent I/O condition"));
 200 #endif
 201 #if defined (SIGIO)
 202   /* "I/O pending" has also been suggested.  A disadvantage is
 203      that signal only happens when the process has
 204      asked for it, not everytime I/O is pending.  Another disadvantage
 205      is the confusion from giving it a different name than under Unix.  */
 206   init_sig (SIGIO, "IO", _("I/O possible"));
 207 #endif
 208 #if defined (SIGWIND)
 209   init_sig (SIGWIND, "WIND", _("SIGWIND"));
 210 #endif
 211 #if defined (SIGPHONE)
 212   init_sig (SIGPHONE, "PHONE", _("SIGPHONE"));
 213 #endif
 214 #if defined (SIGPOLL)
 215   init_sig (SIGPOLL, "POLL", _("I/O possible"));
 216 #endif
 217 #if defined (SIGLOST)
 218   init_sig (SIGLOST, "LOST", _("Resource lost"));
 219 #endif
 220 #if defined (SIGDANGER)
 221   init_sig (SIGDANGER, "DANGER", _("Danger signal"));
 222 #endif
 223 #if defined (SIGINFO)
 224   init_sig (SIGINFO, "INFO", _("Information request"));
 225 #endif
 226 #if defined (SIGNOFP)
 227   init_sig (SIGNOFP, "NOFP", _("Floating point co-processor not available"));
 228 #endif
 229
 230   return 1;
 231 }
 232
 233 #endif  /* SYS_SIGLIST_DECLARED */
 234
 235
 236 char *
 237 strsignal (signal)
 238      int signal;
 239 {
 240   static char buf[] = "Signal 12345678901234567890";
 241
 242 #if !defined(SYS_SIGLIST_DECLARED)
 243   static char sig_initted = 0;
 244
 245   if (!sig_initted)
 246     sig_initted = signame_init ();
 247 #endif
 248
 249   if (signal > 0 || signal < NSIG)
 250     return (char *) sys_siglist[signal];
 251
 252   sprintf (buf, "Signal %d", signal);
 253   return buf;
 254 }
 255
 256 #endif  /* HAVE_STRSIGNAL */