signame.c

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