signame.c

   1 /* Convert between signal names and numbers.
   2 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free
   4 Software Foundation, Inc.
   5 This file is part of GNU Make.
   6
   7 GNU Make is free software; you can redistribute it and/or modify it under the
   8 terms of the GNU General Public License as published by the Free Software
   9 Foundation; either version 3 of the License, or (at your option) any later
  10 version.
  11
  12 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  14 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License along with
  17 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include "make.h"
  20
  21 /* If the system provides strsignal, we don't need it. */
  22
  23 #if !HAVE_STRSIGNAL
  24
  25 /* If the system provides sys_siglist, we'll use that.
  26    Otherwise create our own.
  27  */
  28
  29 #if !HAVE_DECL_SYS_SIGLIST
  30
  31 /* Some systems do not define NSIG in <signal.h>.  */
  32 #ifndef NSIG
  33 #ifdef  _NSIG
  34 #define NSIG    _NSIG
  35 #else
  36 #define NSIG    32
  37 #endif
  38 #endif
  39
  40 /* There is too much variation in Sys V signal numbers and names, so
  41    we must initialize them at runtime.  */
  42
  43 static const char *undoc;
  44
  45 static const char *sys_siglist[NSIG];
  46
  47 /* Table of abbreviations for signals.  Note:  A given number can
  48    appear more than once with different abbreviations.  */
  49 #define SIG_TABLE_SIZE  (NSIG*2)
  50
  51 typedef struct
  52   {
  53     int number;
  54     const char *abbrev;
  55   } num_abbrev;
  56
  57 static num_abbrev sig_table[SIG_TABLE_SIZE];
  58
  59 /* Number of elements of sig_table used.  */
  60 static int sig_table_nelts = 0;
  61
  62 /* Enter signal number NUMBER into the tables with ABBREV and NAME.  */
  63
  64 static void
  65 init_sig (int number, const char *abbrev, const char *name)
  66 {
  67   /* If this value is ever greater than NSIG it seems like it'd be a bug in
  68      the system headers, but... better safe than sorry.  We know, for
  69      example, that this isn't always true on VMS.  */
  70
  71   if (number >= 0 && number < NSIG)
  72     sys_siglist[number] = name;
  73
  74   if (sig_table_nelts < SIG_TABLE_SIZE)
  75     {
  76       sig_table[sig_table_nelts].number = number;
  77       sig_table[sig_table_nelts++].abbrev = abbrev;
  78     }
  79 }
  80
  81 static int
  82 signame_init (void)
  83 {
  84   int i;
  85
  86   undoc = xstrdup (_("unknown signal"));
  87
  88   /* Initialize signal names.  */
  89   for (i = 0; i < NSIG; i++)
  90     sys_siglist[i] = undoc;
  91
  92   /* Initialize signal names.  */
  93 #if defined (SIGHUP)
  94   init_sig (SIGHUP, "HUP", _("Hangup"));
  95 #endif
  96 #if defined (SIGINT)
  97   init_sig (SIGINT, "INT", _("Interrupt"));
  98 #endif
  99 #if defined (SIGQUIT)
 100   init_sig (SIGQUIT, "QUIT", _("Quit"));
 101 #endif
 102 #if defined (SIGILL)
 103   init_sig (SIGILL, "ILL", _("Illegal Instruction"));
 104 #endif
 105 #if defined (SIGTRAP)
 106   init_sig (SIGTRAP, "TRAP", _("Trace/breakpoint trap"));
 107 #endif
 108   /* If SIGIOT == SIGABRT, we want to print it as SIGABRT because
 109      SIGABRT is in ANSI and POSIX.1 and SIGIOT isn't.  */
 110 #if defined (SIGABRT)
 111   init_sig (SIGABRT, "ABRT", _("Aborted"));
 112 #endif
 113 #if defined (SIGIOT)
 114   init_sig (SIGIOT, "IOT", _("IOT trap"));
 115 #endif
 116 #if defined (SIGEMT)
 117   init_sig (SIGEMT, "EMT", _("EMT trap"));
 118 #endif
 119 #if defined (SIGFPE)
 120   init_sig (SIGFPE, "FPE", _("Floating point exception"));
 121 #endif
 122 #if defined (SIGKILL)
 123   init_sig (SIGKILL, "KILL", _("Killed"));
 124 #endif
 125 #if defined (SIGBUS)
 126   init_sig (SIGBUS, "BUS", _("Bus error"));
 127 #endif
 128 #if defined (SIGSEGV)
 129   init_sig (SIGSEGV, "SEGV", _("Segmentation fault"));
 130 #endif
 131 #if defined (SIGSYS)
 132   init_sig (SIGSYS, "SYS", _("Bad system call"));
 133 #endif
 134 #if defined (SIGPIPE)
 135   init_sig (SIGPIPE, "PIPE", _("Broken pipe"));
 136 #endif
 137 #if defined (SIGALRM)
 138   init_sig (SIGALRM, "ALRM", _("Alarm clock"));
 139 #endif
 140 #if defined (SIGTERM)
 141   init_sig (SIGTERM, "TERM", _("Terminated"));
 142 #endif
 143 #if defined (SIGUSR1)
 144   init_sig (SIGUSR1, "USR1", _("User defined signal 1"));
 145 #endif
 146 #if defined (SIGUSR2)
 147   init_sig (SIGUSR2, "USR2", _("User defined signal 2"));
 148 #endif
 149   /* If SIGCLD == SIGCHLD, we want to print it as SIGCHLD because that
 150      is what is in POSIX.1.  */
 151 #if defined (SIGCHLD)
 152   init_sig (SIGCHLD, "CHLD", _("Child exited"));
 153 #endif
 154 #if defined (SIGCLD)
 155   init_sig (SIGCLD, "CLD", _("Child exited"));
 156 #endif
 157 #if defined (SIGPWR)
 158   init_sig (SIGPWR, "PWR", _("Power failure"));
 159 #endif
 160 #if defined (SIGTSTP)
 161   init_sig (SIGTSTP, "TSTP", _("Stopped"));
 162 #endif
 163 #if defined (SIGTTIN)
 164   init_sig (SIGTTIN, "TTIN", _("Stopped (tty input)"));
 165 #endif
 166 #if defined (SIGTTOU)
 167   init_sig (SIGTTOU, "TTOU", _("Stopped (tty output)"));
 168 #endif
 169 #if defined (SIGSTOP)
 170   init_sig (SIGSTOP, "STOP", _("Stopped (signal)"));
 171 #endif
 172 #if defined (SIGXCPU)
 173   init_sig (SIGXCPU, "XCPU", _("CPU time limit exceeded"));
 174 #endif
 175 #if defined (SIGXFSZ)
 176   init_sig (SIGXFSZ, "XFSZ", _("File size limit exceeded"));
 177 #endif
 178 #if defined (SIGVTALRM)
 179   init_sig (SIGVTALRM, "VTALRM", _("Virtual timer expired"));
 180 #endif
 181 #if defined (SIGPROF)
 182   init_sig (SIGPROF, "PROF", _("Profiling timer expired"));
 183 #endif
 184 #if defined (SIGWINCH)
 185   /* "Window size changed" might be more accurate, but even if that
 186      is all that it means now, perhaps in the future it will be
 187      extended to cover other kinds of window changes.  */
 188   init_sig (SIGWINCH, "WINCH", _("Window changed"));
 189 #endif
 190 #if defined (SIGCONT)
 191   init_sig (SIGCONT, "CONT", _("Continued"));
 192 #endif
 193 #if defined (SIGURG)
 194   init_sig (SIGURG, "URG", _("Urgent I/O condition"));
 195 #endif
 196 #if defined (SIGIO)
 197   /* "I/O pending" has also been suggested.  A disadvantage is
 198      that signal only happens when the process has
 199      asked for it, not everytime I/O is pending.  Another disadvantage
 200      is the confusion from giving it a different name than under Unix.  */
 201   init_sig (SIGIO, "IO", _("I/O possible"));
 202 #endif
 203 #if defined (SIGWIND)
 204   init_sig (SIGWIND, "WIND", _("SIGWIND"));
 205 #endif
 206 #if defined (SIGPHONE)
 207   init_sig (SIGPHONE, "PHONE", _("SIGPHONE"));
 208 #endif
 209 #if defined (SIGPOLL)
 210   init_sig (SIGPOLL, "POLL", _("I/O possible"));
 211 #endif
 212 #if defined (SIGLOST)
 213   init_sig (SIGLOST, "LOST", _("Resource lost"));
 214 #endif
 215 #if defined (SIGDANGER)
 216   init_sig (SIGDANGER, "DANGER", _("Danger signal"));
 217 #endif
 218 #if defined (SIGINFO)
 219   init_sig (SIGINFO, "INFO", _("Information request"));
 220 #endif
 221 #if defined (SIGNOFP)
 222   init_sig (SIGNOFP, "NOFP", _("Floating point co-processor not available"));
 223 #endif
 224
 225   return 1;
 226 }
 227
 228 #endif  /* HAVE_DECL_SYS_SIGLIST */
 229
 230
 231 char *
 232 strsignal (int sig)
 233 {
 234   static char buf[] = "Signal 12345678901234567890";
 235
 236 #if ! HAVE_DECL_SYS_SIGLIST
 237 # if HAVE_DECL__SYS_SIGLIST
 238 #  define sys_siglist _sys_siglist
 239 # elif HAVE_DECL___SYS_SIGLIST
 240 #  define sys_siglist __sys_siglist
 241 # else
 242   static char sig_initted = 0;
 243
 244   if (!sig_initted)
 245     sig_initted = signame_init ();
 246 # endif
 247 #endif
 248
 249   if (sig > 0 || sig < NSIG)
 250     return (char *) sys_siglist[sig];
 251
 252   sprintf (buf, "Signal %d", sig);
 253   return buf;
 254 }
 255
 256 #endif  /* HAVE_STRSIGNAL */