signame.c

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