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/* sig2str.c -- convert between signal names and numbers
Copyright (C) 2002, 2004 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by Paul Eggert. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <limits.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "sig2str.h"
#ifndef SIGRTMIN
# define SIGRTMIN 0
# undef SIGRTMAX
#endif
#ifndef SIGRTMAX
# define SIGRTMAX (SIGRTMIN - 1)
#endif
#define NUMNAME(name) { SIG##name, #name }
/* Signal names and numbers. Put the preferred name first. */
static struct numname { int num; char const name[8]; } numname_table[] =
{
/* Signals required by POSIX 1003.1-2001 base, listed in
traditional numeric order. */
#ifdef SIGHUP
NUMNAME (HUP),
#endif
#ifdef SIGINT
NUMNAME (INT),
#endif
#ifdef SIGQUIT
NUMNAME (QUIT),
#endif
#ifdef SIGILL
NUMNAME (ILL),
#endif
#ifdef SIGTRAP
NUMNAME (TRAP),
#endif
#ifdef SIGABRT
NUMNAME (ABRT),
#endif
#ifdef SIGFPE
NUMNAME (FPE),
#endif
#ifdef SIGKILL
NUMNAME (KILL),
#endif
#ifdef SIGBUS
NUMNAME (BUS),
#endif
#ifdef SIGSEGV
NUMNAME (SEGV),
#endif
#ifdef SIGPIPE
NUMNAME (PIPE),
#endif
#ifdef SIGALRM
NUMNAME (ALRM),
#endif
#ifdef SIGTERM
NUMNAME (TERM),
#endif
#ifdef SIGUSR1
NUMNAME (USR1),
#endif
#ifdef SIGUSR2
NUMNAME (USR2),
#endif
#ifdef SIGCHLD
NUMNAME (CHLD),
#endif
#ifdef SIGURG
NUMNAME (URG),
#endif
#ifdef SIGSTOP
NUMNAME (STOP),
#endif
#ifdef SIGTSTP
NUMNAME (TSTP),
#endif
#ifdef SIGCONT
NUMNAME (CONT),
#endif
#ifdef SIGTTIN
NUMNAME (TTIN),
#endif
#ifdef SIGTTOU
NUMNAME (TTOU),
#endif
/* Signals required by POSIX 1003.1-2001 with the XSI extension. */
#ifdef SIGSYS
NUMNAME (SYS),
#endif
#ifdef SIGPOLL
NUMNAME (POLL),
#endif
#ifdef SIGVTALRM
NUMNAME (VTALRM),
#endif
#ifdef SIGPROF
NUMNAME (PROF),
#endif
#ifdef SIGXCPU
NUMNAME (XCPU),
#endif
#ifdef SIGXFSZ
NUMNAME (XFSZ),
#endif
/* Unix Version 7. */
#ifdef SIGIOT
NUMNAME (IOT), /* Older name for ABRT. */
#endif
#ifdef SIGEMT
NUMNAME (EMT),
#endif
/* USG Unix. */
#ifdef SIGPHONE
NUMNAME (PHONE),
#endif
#ifdef SIGWIND
NUMNAME (WIND),
#endif
/* Unix System V. */
#ifdef SIGCLD
NUMNAME (CLD),
#endif
#ifdef SIGPWR
NUMNAME (PWR),
#endif
/* GNU/Linux 2.2 and Solaris 8. */
#ifdef SIGCANCEL
NUMNAME (CANCEL),
#endif
#ifdef SIGLWP
NUMNAME (LWP),
#endif
#ifdef SIGWAITING
NUMNAME (WAITING),
#endif
#ifdef SIGFREEZE
NUMNAME (FREEZE),
#endif
#ifdef SIGTHAW
NUMNAME (THAW),
#endif
#ifdef SIGLOST
NUMNAME (LOST),
#endif
#ifdef SIGWINCH
NUMNAME (WINCH),
#endif
/* GNU/Linux 2.2. */
#ifdef SIGINFO
NUMNAME (INFO),
#endif
#ifdef SIGIO
NUMNAME (IO),
#endif
#ifdef SIGSTKFLT
NUMNAME (STKFLT),
#endif
/* AIX 5L. */
#ifdef SIGDANGER
NUMNAME (DANGER),
#endif
#ifdef SIGGRANT
NUMNAME (GRANT),
#endif
#ifdef SIGMIGRATE
NUMNAME (MIGRATE),
#endif
#ifdef SIGMSG
NUMNAME (MSG),
#endif
#ifdef SIGPRE
NUMNAME (PRE),
#endif
#ifdef SIGRETRACT
NUMNAME (RETRACT),
#endif
#ifdef SIGSAK
NUMNAME (SAK),
#endif
#ifdef SIGSOUND
NUMNAME (SOUND),
#endif
/* Older AIX versions. */
#ifdef SIGALRM1
NUMNAME (ALRM1), /* unknown; taken from Bash 2.05 */
#endif
#ifdef SIGKAP
NUMNAME (KAP), /* Older name for SIGGRANT. */
#endif
#ifdef SIGVIRT
NUMNAME (VIRT), /* unknown; taken from Bash 2.05 */
#endif
#ifdef SIGWINDOW
NUMNAME (WINDOW), /* Older name for SIGWINCH. */
#endif
/* BeOS */
#ifdef SIGKILLTHR
NUMNAME (KILLTHR),
#endif
/* Older HP-UX versions. */
#ifdef SIGDIL
NUMNAME (DIL),
#endif
/* Korn shell and Bash, of uncertain vintage. */
{ 0, "EXIT" }
};
#define NUMNAME_ENTRIES (sizeof numname_table / sizeof numname_table[0])
/* ISDIGIT differs from isdigit, as follows:
- Its arg may be any int or unsigned int; it need not be an unsigned char.
- It's guaranteed to evaluate its argument exactly once.
- It's typically faster.
POSIX says that only '0' through '9' are digits. Prefer ISDIGIT to
ISDIGIT_LOCALE unless it's important to use the locale's definition
of `digit' even when the host does not conform to POSIX. */
#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
/* Convert the signal name SIGNAME to a signal number. Return the
signal number if successful, -1 otherwise. */
static int
str2signum (char const *signame)
{
if (ISDIGIT (*signame))
{
char *endp;
long int n = strtol (signame, &endp, 10);
if (! *endp && n <= SIGNUM_BOUND)
return n;
}
else
{
unsigned int i;
for (i = 0; i < NUMNAME_ENTRIES; i++)
if (strcmp (numname_table[i].name, signame) == 0)
return numname_table[i].num;
{
char *endp;
int rtmin = SIGRTMIN;
int rtmax = SIGRTMAX;
if (0 < rtmin && strncmp (signame, "RTMIN", 5) == 0)
{
long int n = strtol (signame + 5, &endp, 10);
if (! *endp && 0 <= n && n <= rtmax - rtmin)
return rtmin + n;
}
else if (0 < rtmax && strncmp (signame, "RTMAX", 5) == 0)
{
long int n = strtol (signame + 5, &endp, 10);
if (! *endp && rtmin - rtmax <= n && n <= 0)
return rtmax + n;
}
}
}
return -1;
}
/* Convert the signal name SIGNAME to the signal number *SIGNUM.
Return 0 if successful, -1 otherwise. */
int
str2sig (char const *signame, int *signum)
{
*signum = str2signum (signame);
return *signum < 0 ? -1 : 0;
}
/* Convert SIGNUM to a signal name in SIGNAME. SIGNAME must point to
a buffer of at least SIG2STR_MAX bytes. Return 0 if successful, -1
otherwise. */
int
sig2str (int signum, char *signame)
{
unsigned int i;
for (i = 0; i < NUMNAME_ENTRIES; i++)
if (numname_table[i].num == signum)
{
strcpy (signame, numname_table[i].name);
return 0;
}
{
int rtmin = SIGRTMIN;
int rtmax = SIGRTMAX;
if (! (rtmin <= signum && signum <= rtmax))
return -1;
if (signum <= rtmin + (rtmax - rtmin) / 2)
{
int delta = signum - rtmin;
sprintf (signame, delta ? "RTMIN+%d" : "RTMIN", delta);
}
else
{
int delta = rtmax - signum;
sprintf (signame, delta ? "RTMAX-%d" : "RTMAX", delta);
}
return 0;
}
}
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