10Sstevel@tonic-gate /*
20Sstevel@tonic-gate * CDDL HEADER START
30Sstevel@tonic-gate *
40Sstevel@tonic-gate * The contents of this file are subject to the terms of the
56812Sraf * Common Development and Distribution License (the "License").
66812Sraf * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate *
80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate * See the License for the specific language governing permissions
110Sstevel@tonic-gate * and limitations under the License.
120Sstevel@tonic-gate *
130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate *
190Sstevel@tonic-gate * CDDL HEADER END
200Sstevel@tonic-gate */
216812Sraf
220Sstevel@tonic-gate /*
236812Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
240Sstevel@tonic-gate * Use is subject to license terms.
250Sstevel@tonic-gate */
260Sstevel@tonic-gate
270Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
280Sstevel@tonic-gate /* All Rights Reserved */
290Sstevel@tonic-gate
306812Sraf #pragma ident "%Z%%M% %I% %E% SMI"
310Sstevel@tonic-gate
320Sstevel@tonic-gate /*
330Sstevel@tonic-gate * execl(name, arg0, arg1, ..., argn, 0)
340Sstevel@tonic-gate * environment automatically passed.
350Sstevel@tonic-gate */
360Sstevel@tonic-gate
376812Sraf #pragma weak _execl = execl
380Sstevel@tonic-gate
396812Sraf #include "lint.h"
400Sstevel@tonic-gate #include <alloca.h>
410Sstevel@tonic-gate #include <malloc.h>
420Sstevel@tonic-gate #include <stdarg.h>
430Sstevel@tonic-gate #include <sys/types.h>
440Sstevel@tonic-gate #include <unistd.h>
450Sstevel@tonic-gate
460Sstevel@tonic-gate /*VARARGS1*/
470Sstevel@tonic-gate int
execl(const char * name,const char * arg0,...)480Sstevel@tonic-gate execl(const char *name, const char *arg0, ...)
490Sstevel@tonic-gate {
500Sstevel@tonic-gate char **argp;
510Sstevel@tonic-gate va_list args;
520Sstevel@tonic-gate char **argvec;
53*6879Sraf extern char **_environ;
540Sstevel@tonic-gate int err;
550Sstevel@tonic-gate int nargs = 0;
560Sstevel@tonic-gate char *nextarg;
570Sstevel@tonic-gate
580Sstevel@tonic-gate /*
590Sstevel@tonic-gate * count the number of arguments in the variable argument list
600Sstevel@tonic-gate * and allocate an argument vector for them on the stack,
610Sstevel@tonic-gate * adding an extra element for a terminating null pointer
620Sstevel@tonic-gate */
630Sstevel@tonic-gate
640Sstevel@tonic-gate va_start(args, arg0);
650Sstevel@tonic-gate while (va_arg(args, char *) != (char *)0) {
660Sstevel@tonic-gate nargs++;
670Sstevel@tonic-gate }
680Sstevel@tonic-gate va_end(args);
690Sstevel@tonic-gate
700Sstevel@tonic-gate /*
710Sstevel@tonic-gate * load the arguments in the variable argument list
720Sstevel@tonic-gate * into the argument vector and add the terminating null pointer
730Sstevel@tonic-gate */
740Sstevel@tonic-gate
750Sstevel@tonic-gate va_start(args, arg0);
760Sstevel@tonic-gate
770Sstevel@tonic-gate /* workaround for bugid 1242839 */
780Sstevel@tonic-gate argvec = (char **)alloca((size_t)((nargs + 2) * sizeof (char *)));
790Sstevel@tonic-gate argp = argvec;
800Sstevel@tonic-gate *argp++ = (char *)arg0;
810Sstevel@tonic-gate while ((nextarg = va_arg(args, char *)) != (char *)0) {
820Sstevel@tonic-gate *argp++ = nextarg;
830Sstevel@tonic-gate }
840Sstevel@tonic-gate va_end(args);
850Sstevel@tonic-gate *argp = (char *)0;
860Sstevel@tonic-gate
870Sstevel@tonic-gate /*
880Sstevel@tonic-gate * call execve()
890Sstevel@tonic-gate */
900Sstevel@tonic-gate
91*6879Sraf err = execve(name, argvec, _environ);
920Sstevel@tonic-gate return (err);
930Sstevel@tonic-gate }
94