signame.c

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