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glibc/sysdeps/generic/signame.c

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/* Convert between signal names and numbers.
Copyright (C) 1990, 92, 93, 95, 96, 97 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <sys/types.h> /* Some systems need this for <signal.h>. */
#include <signal.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
/* Some systems declare `sys_siglist in <unistd.h>; if
configure defined SYS_SIGLIST_DECLARED, it may expect
to find the declaration there. */
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
/* Some systems do not define NSIG in <signal.h>. */
#ifndef NSIG
#ifdef _NSIG
#define NSIG _NSIG
#else
#define NSIG 32
#endif
#endif
#if !__STDC__
#define const
#endif
#include "signame.h"
#ifndef HAVE_SYS_SIGLIST
/* There is too much variation in Sys V signal numbers and names, so
we must initialize them at runtime. */
static const char undoc[] = "unknown signal";
const char *sys_siglist[NSIG];
#else /* HAVE_SYS_SIGLIST. */
#ifndef SYS_SIGLIST_DECLARED
extern char *sys_siglist[];
#endif /* Not SYS_SIGLIST_DECLARED. */
#endif /* Not HAVE_SYS_SIGLIST. */
/* Table of abbreviations for signals. Note: A given number can
appear more than once with different abbreviations. */
typedef struct
{
int number;
const char *abbrev;
} num_abbrev;
static num_abbrev sig_table[NSIG*2];
/* Number of elements of sig_table used. */
static int sig_table_nelts = 0;
/* Enter signal number NUMBER into the tables with ABBREV and NAME. */
static void
init_sig (number, abbrev, name)
int number;
const char *abbrev;
const char *name;
{
#ifndef HAVE_SYS_SIGLIST
sys_siglist[number] = name;
#endif
sig_table[sig_table_nelts].number = number;
sig_table[sig_table_nelts++].abbrev = abbrev;
}
void
signame_init ()
{
#ifndef HAVE_SYS_SIGLIST
int i;
/* Initialize signal names. */
for (i = 0; i < NSIG; i++)
sys_siglist[i] = undoc;
#endif /* !HAVE_SYS_SIGLIST */
/* Initialize signal names. */
#if defined (SIGHUP)
init_sig (SIGHUP, "HUP", "Hangup");
#endif
#if defined (SIGINT)
init_sig (SIGINT, "INT", "Interrupt");
#endif
#if defined (SIGQUIT)
init_sig (SIGQUIT, "QUIT", "Quit");
#endif
#if defined (SIGILL)
init_sig (SIGILL, "ILL", "Illegal Instruction");
#endif
#if defined (SIGTRAP)
init_sig (SIGTRAP, "TRAP", "Trace/breakpoint trap");
#endif
/* If SIGIOT == SIGABRT, we want to print it as SIGABRT because
SIGABRT is in ANSI and POSIX.1 and SIGIOT isn't. */
#if defined (SIGABRT)
init_sig (SIGABRT, "ABRT", "Aborted");
#endif
#if defined (SIGIOT)
init_sig (SIGIOT, "IOT", "IOT trap");
#endif
#if defined (SIGEMT)
init_sig (SIGEMT, "EMT", "EMT trap");
#endif
#if defined (SIGFPE)
init_sig (SIGFPE, "FPE", "Floating point exception");
#endif
#if defined (SIGKILL)
init_sig (SIGKILL, "KILL", "Killed");
#endif
#if defined (SIGBUS)
init_sig (SIGBUS, "BUS", "Bus error");
#endif
#if defined (SIGSEGV)
init_sig (SIGSEGV, "SEGV", "Segmentation fault");
#endif
#if defined (SIGSYS)
init_sig (SIGSYS, "SYS", "Bad system call");
#endif
#if defined (SIGPIPE)
init_sig (SIGPIPE, "PIPE", "Broken pipe");
#endif
#if defined (SIGALRM)
init_sig (SIGALRM, "ALRM", "Alarm clock");
#endif
#if defined (SIGTERM)
init_sig (SIGTERM, "TERM", "Terminated");
#endif
#if defined (SIGUSR1)
init_sig (SIGUSR1, "USR1", "User defined signal 1");
#endif
#if defined (SIGUSR2)
init_sig (SIGUSR2, "USR2", "User defined signal 2");
#endif
/* If SIGCLD == SIGCHLD, we want to print it as SIGCHLD because that
is what is in POSIX.1. */
#if defined (SIGCHLD)
init_sig (SIGCHLD, "CHLD", "Child exited");
#endif
#if defined (SIGCLD)
init_sig (SIGCLD, "CLD", "Child exited");
#endif
#if defined (SIGPWR)
init_sig (SIGPWR, "PWR", "Power failure");
#endif
#if defined (SIGTSTP)
init_sig (SIGTSTP, "TSTP", "Stopped");
#endif
#if defined (SIGTTIN)
init_sig (SIGTTIN, "TTIN", "Stopped (tty input)");
#endif
#if defined (SIGTTOU)
init_sig (SIGTTOU, "TTOU", "Stopped (tty output)");
#endif
#if defined (SIGSTOP)
init_sig (SIGSTOP, "STOP", "Stopped (signal)");
#endif
#if defined (SIGXCPU)
init_sig (SIGXCPU, "XCPU", "CPU time limit exceeded");
#endif
#if defined (SIGXFSZ)
init_sig (SIGXFSZ, "XFSZ", "File size limit exceeded");
#endif
#if defined (SIGVTALRM)
init_sig (SIGVTALRM, "VTALRM", "Virtual timer expired");
#endif
#if defined (SIGPROF)
init_sig (SIGPROF, "PROF", "Profiling timer expired");
#endif
#if defined (SIGWINCH)
/* "Window size changed" might be more accurate, but even if that
is all that it means now, perhaps in the future it will be
extended to cover other kinds of window changes. */
init_sig (SIGWINCH, "WINCH", "Window changed");
#endif
#if defined (SIGCONT)
init_sig (SIGCONT, "CONT", "Continued");
#endif
#if defined (SIGURG)
init_sig (SIGURG, "URG", "Urgent I/O condition");
#endif
#if defined (SIGIO)
/* "I/O pending" has also been suggested. A disadvantage is
that signal only happens when the process has
asked for it, not everytime I/O is pending. Another disadvantage
is the confusion from giving it a different name than under Unix. */
init_sig (SIGIO, "IO", "I/O possible");
#endif
#if defined (SIGWIND)
init_sig (SIGWIND, "WIND", "SIGWIND");
#endif
#if defined (SIGPHONE)
init_sig (SIGPHONE, "PHONE", "SIGPHONE");
#endif
#if defined (SIGPOLL)
init_sig (SIGPOLL, "POLL", "I/O possible");
#endif
#if defined (SIGLOST)
init_sig (SIGLOST, "LOST", "Resource lost");
#endif
#if defined (SIGDANGER)
init_sig (SIGDANGER, "DANGER", "Danger signal");
#endif
#if defined (SIGINFO)
init_sig (SIGINFO, "INFO", "Information request");
#endif
#if defined (SIGNOFP)
init_sig (SIGNOFP, "NOFP", "Floating point co-processor not available");
#endif
}
/* Return the abbreviation for signal NUMBER. */
char *
sig_abbrev (number)
int number;
{
int i;
if (sig_table_nelts == 0)
signame_init ();
for (i = 0; i < sig_table_nelts; i++)
if (sig_table[i].number == number)
return (char *)sig_table[i].abbrev;
return NULL;
}
/* Return the signal number for an ABBREV, or -1 if there is no
signal by that name. */
int
sig_number (abbrev)
const char *abbrev;
{
int i;
if (sig_table_nelts == 0)
signame_init ();
/* Skip over "SIG" if present. */
if (abbrev[0] == 'S' && abbrev[1] == 'I' && abbrev[2] == 'G')
abbrev += 3;
for (i = 0; i < sig_table_nelts; i++)
if (abbrev[0] == sig_table[i].abbrev[0]
&& strcmp (abbrev, sig_table[i].abbrev) == 0)
return sig_table[i].number;
return -1;
}
#ifndef HAVE_PSIGNAL
/* Print to standard error the name of SIGNAL, preceded by MESSAGE and
a colon, and followed by a newline. */
void
psignal (signal, message)
int signal;
const char *message;
{
if (signal <= 0 || signal >= NSIG)
fprintf (stderr, "%s: unknown signal", message);
else
fprintf (stderr, "%s: %s\n", message, sys_siglist[signal]);
}
#endif
#ifndef HAVE_STRSIGNAL
/* Return the string associated with the signal number. */
char *
strsignal (signal)
int signal;
{
static char buf[] = "Signal 12345678901234567890";
if (signal > 0 || signal < NSIG)
return (char *) sys_siglist[signal];
sprintf (buf, "Signal %d", signal);
return buf;
}
#endif
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