glibc/posix/execlp.c
Roland McGrath c41f555e0c * include/unistd.h: Use libc_hidden_proto for _exit, alarm, confstr,
execl, execle, execlp, execvp, getpid, getsid.
	* sysdeps/generic/alarm.c: Add libc_hidden_def.
	* sysdeps/unix/alarm.c: Likewise.
	* posix/confstr.c: Likewise.
	* posix/execvp.c: Likewise.
	* posix/execlp.c: Likewise.
	* posix/execle.c: Likewise.
	* posix/execl.c: Likewise.
	* sysdeps/generic/getsid.c: Likewise.
	* sysdeps/mach/hurd/getsid.c: Likewise.
	* sysdeps/generic/getpid.c: Add libc_hidden_weak.
	* sysdeps/mach/hurd/getpid.c: Likewise.

	* include/stdlib.h: Use libc_hidden_proto for ecvt_r, fcvt_r,
	qecvt_r, qfcvt_r, lrand48_r.
	* misc/efgcvt_r.c: Add libc_hidden_def.

	* include/wordexp.h: Use libc_hidden_proto for wordfree.
	* sysdeps/generic/wordexp.c: Add libc_hidden_def.

	* include/langinfo.h: Use libc_hidden_proto for nl_langinfo.
	* locale/nl_langinfo.c: Add libc_hidden_def.

	* include/glob.h: Use libc_hidden_proto for glob, globfree, globfree64.
	* sysdeps/generic/glob.c: Add libc_hidden_def.
	* sysdeps/generic/glob64.c: Likewise.
	* sysdeps/wordsize-64/glob.c (globfree64): Add libc_hidden_weak.
2002-08-04 03:30:56 +00:00

76 lines
2.1 KiB
C

/* Copyright (C) 1991,93,96,97,98,99,2002 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. */
#include <alloca.h>
#include <unistd.h>
#include <stdarg.h>
#include <stddef.h>
#include <string.h>
#include <stackinfo.h>
/* Execute FILE, searching in the `PATH' environment variable if
it contains no slashes, with all arguments after FILE until a
NULL pointer and environment from `environ'. */
int
execlp (const char *file, const char *arg, ...)
{
size_t argv_max = 1024;
const char **argv = alloca (argv_max * sizeof (const char *));
unsigned int i;
va_list args;
argv[0] = arg;
va_start (args, arg);
i = 0;
while (argv[i++] != NULL)
{
if (i == argv_max)
{
const char **nptr = alloca ((argv_max *= 2) * sizeof (const char *));
#ifndef _STACK_GROWS_UP
if ((char *) nptr + argv_max == (char *) argv)
{
/* Stack grows down. */
argv = (const char **) memcpy (nptr, argv,
i * sizeof (const char *));
argv_max += i;
}
else
#endif
#ifndef _STACK_GROWS_DOWN
if ((char *) argv + i == (char *) nptr)
/* Stack grows up. */
argv_max += i;
else
#endif
/* We have a hole in the stack. */
argv = (const char **) memcpy (nptr, argv,
i * sizeof (const char *));
}
argv[i] = va_arg (args, const char *);
}
va_end (args);
return execvp (file, (char *const *) argv);
}
libc_hidden_def (execlp)