sysdeps/generic/signame.c

   1 /* Convert between signal names and numbers.
   2    Copyright (C) 1990, 92, 93, 95, 96, 97 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23
  24 #include <stdio.h>
  25 #include <sys/types.h>          /* Some systems need this for <signal.h>.  */
  26 #include <signal.h>
  27
  28 #ifdef HAVE_STRING_H
  29 #include <string.h>
  30 #endif
  31
  32 /* Some systems declare `sys_siglist in <unistd.h>; if
  33    configure defined SYS_SIGLIST_DECLARED, it may expect
  34    to find the declaration there.  */
  35 #ifdef HAVE_UNISTD_H
  36 #include <unistd.h>
  37 #endif
  38
  39
  40 /* Some systems do not define NSIG in <signal.h>.  */
  41 #ifndef NSIG
  42 #ifdef  _NSIG
  43 #define NSIG    _NSIG
  44 #else
  45 #define NSIG    32
  46 #endif
  47 #endif
  48
  49 #if !__STDC__
  50 #define const
  51 #endif
  52
  53 #include "signame.h"
  54
  55 #ifndef HAVE_SYS_SIGLIST
  56 /* There is too much variation in Sys V signal numbers and names, so
  57    we must initialize them at runtime.  */
  58
  59 static const char undoc[] = "unknown signal";
  60
  61 const char *sys_siglist[NSIG];
  62
  63 #else   /* HAVE_SYS_SIGLIST.  */
  64
  65 #ifndef SYS_SIGLIST_DECLARED
  66 extern char *sys_siglist[];
  67 #endif  /* Not SYS_SIGLIST_DECLARED.  */
  68
  69 #endif  /* Not HAVE_SYS_SIGLIST.  */
  70
  71 /* Table of abbreviations for signals.  Note:  A given number can
  72    appear more than once with different abbreviations.  */
  73 typedef struct
  74   {
  75     int number;
  76     const char *abbrev;
  77   } num_abbrev;
  78 static num_abbrev sig_table[NSIG*2];
  79 /* Number of elements of sig_table used.  */
  80 static int sig_table_nelts = 0;
  81
  82 /* Enter signal number NUMBER into the tables with ABBREV and NAME.  */
  83
  84 static void
  85 init_sig (number, abbrev, name)
  86      int number;
  87      const char *abbrev;
  88      const char *name;
  89 {
  90 #ifndef HAVE_SYS_SIGLIST
  91   sys_siglist[number] = name;
  92 #endif
  93   sig_table[sig_table_nelts].number = number;
  94   sig_table[sig_table_nelts++].abbrev = abbrev;
  95 }
  96
  97 void
  98 signame_init ()
  99 {
 100 #ifndef HAVE_SYS_SIGLIST
 101   int i;
 102   /* Initialize signal names.  */
 103   for (i = 0; i < NSIG; i++)
 104     sys_siglist[i] = undoc;
 105 #endif /* !HAVE_SYS_SIGLIST */
 106
 107   /* Initialize signal names.  */
 108 #if defined (SIGHUP)
 109   init_sig (SIGHUP, "HUP", "Hangup");
 110 #endif
 111 #if defined (SIGINT)
 112   init_sig (SIGINT, "INT", "Interrupt");
 113 #endif
 114 #if defined (SIGQUIT)
 115   init_sig (SIGQUIT, "QUIT", "Quit");
 116 #endif
 117 #if defined (SIGILL)
 118   init_sig (SIGILL, "ILL", "Illegal Instruction");
 119 #endif
 120 #if defined (SIGTRAP)
 121   init_sig (SIGTRAP, "TRAP", "Trace/breakpoint trap");
 122 #endif
 123   /* If SIGIOT == SIGABRT, we want to print it as SIGABRT because
 124      SIGABRT is in ANSI and POSIX.1 and SIGIOT isn't.  */
 125 #if defined (SIGABRT)
 126   init_sig (SIGABRT, "ABRT", "Aborted");
 127 #endif
 128 #if defined (SIGIOT)
 129   init_sig (SIGIOT, "IOT", "IOT trap");
 130 #endif
 131 #if defined (SIGEMT)
 132   init_sig (SIGEMT, "EMT", "EMT trap");
 133 #endif
 134 #if defined (SIGFPE)
 135   init_sig (SIGFPE, "FPE", "Floating point exception");
 136 #endif
 137 #if defined (SIGKILL)
 138   init_sig (SIGKILL, "KILL", "Killed");
 139 #endif
 140 #if defined (SIGBUS)
 141   init_sig (SIGBUS, "BUS", "Bus error");
 142 #endif
 143 #if defined (SIGSEGV)
 144   init_sig (SIGSEGV, "SEGV", "Segmentation fault");
 145 #endif
 146 #if defined (SIGSYS)
 147   init_sig (SIGSYS, "SYS", "Bad system call");
 148 #endif
 149 #if defined (SIGPIPE)
 150   init_sig (SIGPIPE, "PIPE", "Broken pipe");
 151 #endif
 152 #if defined (SIGALRM)
 153   init_sig (SIGALRM, "ALRM", "Alarm clock");
 154 #endif
 155 #if defined (SIGTERM)
 156   init_sig (SIGTERM, "TERM", "Terminated");
 157 #endif
 158 #if defined (SIGUSR1)
 159   init_sig (SIGUSR1, "USR1", "User defined signal 1");
 160 #endif
 161 #if defined (SIGUSR2)
 162   init_sig (SIGUSR2, "USR2", "User defined signal 2");
 163 #endif
 164   /* If SIGCLD == SIGCHLD, we want to print it as SIGCHLD because that
 165      is what is in POSIX.1.  */
 166 #if defined (SIGCHLD)
 167   init_sig (SIGCHLD, "CHLD", "Child exited");
 168 #endif
 169 #if defined (SIGCLD)
 170   init_sig (SIGCLD, "CLD", "Child exited");
 171 #endif
 172 #if defined (SIGPWR)
 173   init_sig (SIGPWR, "PWR", "Power failure");
 174 #endif
 175 #if defined (SIGTSTP)
 176   init_sig (SIGTSTP, "TSTP", "Stopped");
 177 #endif
 178 #if defined (SIGTTIN)
 179   init_sig (SIGTTIN, "TTIN", "Stopped (tty input)");
 180 #endif
 181 #if defined (SIGTTOU)
 182   init_sig (SIGTTOU, "TTOU", "Stopped (tty output)");
 183 #endif
 184 #if defined (SIGSTOP)
 185   init_sig (SIGSTOP, "STOP", "Stopped (signal)");
 186 #endif
 187 #if defined (SIGXCPU)
 188   init_sig (SIGXCPU, "XCPU", "CPU time limit exceeded");
 189 #endif
 190 #if defined (SIGXFSZ)
 191   init_sig (SIGXFSZ, "XFSZ", "File size limit exceeded");
 192 #endif
 193 #if defined (SIGVTALRM)
 194   init_sig (SIGVTALRM, "VTALRM", "Virtual timer expired");
 195 #endif
 196 #if defined (SIGPROF)
 197   init_sig (SIGPROF, "PROF", "Profiling timer expired");
 198 #endif
 199 #if defined (SIGWINCH)
 200   /* "Window size changed" might be more accurate, but even if that
 201      is all that it means now, perhaps in the future it will be
 202      extended to cover other kinds of window changes.  */
 203   init_sig (SIGWINCH, "WINCH", "Window changed");
 204 #endif
 205 #if defined (SIGCONT)
 206   init_sig (SIGCONT, "CONT", "Continued");
 207 #endif
 208 #if defined (SIGURG)
 209   init_sig (SIGURG, "URG", "Urgent I/O condition");
 210 #endif
 211 #if defined (SIGIO)
 212   /* "I/O pending" has also been suggested.  A disadvantage is
 213      that signal only happens when the process has
 214      asked for it, not everytime I/O is pending.  Another disadvantage
 215      is the confusion from giving it a different name than under Unix.  */
 216   init_sig (SIGIO, "IO", "I/O possible");
 217 #endif
 218 #if defined (SIGWIND)
 219   init_sig (SIGWIND, "WIND", "SIGWIND");
 220 #endif
 221 #if defined (SIGPHONE)
 222   init_sig (SIGPHONE, "PHONE", "SIGPHONE");
 223 #endif
 224 #if defined (SIGPOLL)
 225   init_sig (SIGPOLL, "POLL", "I/O possible");
 226 #endif
 227 #if defined (SIGLOST)
 228   init_sig (SIGLOST, "LOST", "Resource lost");
 229 #endif
 230 #if defined (SIGDANGER)
 231   init_sig (SIGDANGER, "DANGER", "Danger signal");
 232 #endif
 233 #if defined (SIGINFO)
 234   init_sig (SIGINFO, "INFO", "Information request");
 235 #endif
 236 #if defined (SIGNOFP)
 237   init_sig (SIGNOFP, "NOFP", "Floating point co-processor not available");
 238 #endif
 239 }
 240
 241 /* Return the abbreviation for signal NUMBER.  */
 242
 243 char *
 244 sig_abbrev (number)
 245      int number;
 246 {
 247   int i;
 248
 249   if (sig_table_nelts == 0)
 250     signame_init ();
 251
 252   for (i = 0; i < sig_table_nelts; i++)
 253     if (sig_table[i].number == number)
 254       return (char *)sig_table[i].abbrev;
 255   return NULL;
 256 }
 257
 258 /* Return the signal number for an ABBREV, or -1 if there is no
 259    signal by that name.  */
 260
 261 int
 262 sig_number (abbrev)
 263      const char *abbrev;
 264 {
 265   int i;
 266
 267   if (sig_table_nelts == 0)
 268     signame_init ();
 269
 270   /* Skip over "SIG" if present.  */
 271   if (abbrev[0] == 'S' && abbrev[1] == 'I' && abbrev[2] == 'G')
 272     abbrev += 3;
 273
 274   for (i = 0; i < sig_table_nelts; i++)
 275     if (abbrev[0] == sig_table[i].abbrev[0]
 276         && strcmp (abbrev, sig_table[i].abbrev) == 0)
 277       return sig_table[i].number;
 278   return -1;
 279 }
 280
 281 #ifndef HAVE_PSIGNAL
 282 /* Print to standard error the name of SIGNAL, preceded by MESSAGE and
 283    a colon, and followed by a newline.  */
 284
 285 void
 286 psignal (signal, message)
 287      int signal;
 288      const char *message;
 289 {
 290   if (signal <= 0 || signal >= NSIG)
 291     fprintf (stderr, "%s: unknown signal", message);
 292   else
 293     fprintf (stderr, "%s: %s\n", message, sys_siglist[signal]);
 294 }
 295 #endif
 296
 297 #ifndef HAVE_STRSIGNAL
 298 /* Return the string associated with the signal number.  */
 299
 300 char *
 301 strsignal (signal)
 302      int signal;
 303 {
 304   static char buf[] = "Signal 12345678901234567890";
 305
 306   if (signal > 0 || signal < NSIG)
 307     return (char *) sys_siglist[signal];
 308
 309   sprintf (buf, "Signal %d", signal);
 310   return buf;
 311 }
 312 #endif