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/* operand2sig.c -- common function for parsing signal specifications
Copyright (C) 2008 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
/* Extracted from kill.c/timeout.c by Pádraig Brady.
FIXME: Move this to gnulib/str2sig.c */
/* Convert OPERAND to a signal number with printable representation SIGNAME.
Return the signal number, or -1 if unsuccessful. */
#include <config.h>
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif
#ifndef WIFSIGNALED
# define WIFSIGNALED(s) (((s) & 0xFFFF) - 1 < (unsigned int) 0xFF)
#endif
#ifndef WTERMSIG
# define WTERMSIG(s) ((s) & 0x7F)
#endif
#include "system.h"
#include "error.h"
#include "sig2str.h"
#include "operand2sig.h"
extern int
operand2sig (char const *operand, char *signame)
{
int signum;
if (ISDIGIT (*operand))
{
char *endp;
long int l = (errno = 0, strtol (operand, &endp, 10));
int i = l;
signum = (operand == endp || *endp || errno || i != l ? -1
: WIFSIGNALED (i) ? WTERMSIG (i) : i);
}
else
{
/* Convert signal to upper case in the C locale, not in the
current locale. Don't assume ASCII; it might be EBCDIC. */
char *upcased = xstrdup (operand);
char *p;
for (p = upcased; *p; p++)
if (strchr ("abcdefghijklmnopqrstuvwxyz", *p))
*p += 'A' - 'a';
/* Look for the signal name, possibly prefixed by "SIG",
and possibly lowercased. */
if (!(str2sig (upcased, &signum) == 0
|| (upcased[0] == 'S' && upcased[1] == 'I' && upcased[2] == 'G'
&& str2sig (upcased + 3, &signum) == 0)))
signum = -1;
free (upcased);
}
if (signum < 0 || sig2str (signum, signame) != 0)
{
error (0, 0, _("%s: invalid signal"), operand);
return -1;
}
return signum;
}
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