1/* Convert between signal names and numbers.
2Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
32000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
4This file is part of GNU Make.
5
6GNU Make is free software; you can redistribute it and/or modify it under the
7terms of the GNU General Public License as published by the Free Software
8Foundation; either version 2, or (at your option) any later version.
9
10GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
11WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13
14You should have received a copy of the GNU General Public License along with
15GNU Make; see the file COPYING.  If not, write to the Free Software
16Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.  */
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
42static const char *undoc;
43
44static 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
50typedef struct
51  {
52    int number;
53    const char *abbrev;
54  } num_abbrev;
55
56static num_abbrev sig_table[SIG_TABLE_SIZE];
57
58/* Number of elements of sig_table used.  */
59static int sig_table_nelts = 0;
60
61/* Enter signal number NUMBER into the tables with ABBREV and NAME.  */
62
63static void
64init_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
80static int
81signame_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
230char *
231strsignal (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 */
256