lib/libc/gen/execle.c

   1 /*      $NetBSD: execle.c,v 1.10 2005/11/29 13:30:49 christos Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 #if 0
  35 static char sccsid[] = "@(#)exec.c      8.1 (Berkeley) 6/4/93";
  36 #else
  37 __RCSID("$NetBSD: execle.c,v 1.10 2005/11/29 13:30:49 christos Exp $");
  38 #endif
  39 #endif /* LIBC_SCCS and not lint */
  40
  41 #include "namespace.h"
  42 #include <stdarg.h>
  43 #include <stdlib.h>
  44 #include <unistd.h>
  45
  46 #ifdef __weak_alias
  47 __weak_alias(execle,_execle)
  48 #endif
  49
  50 int
  51 execle(const char *name, const char *arg, ...)
  52 {
  53 #if defined(__i386__) || defined(__m68k__)
  54         va_list ap;
  55         char **envp;
  56
  57         va_start(ap, arg);
  58         while ((va_arg(ap, char *)) != NULL)
  59                 continue;
  60         envp = va_arg(ap, char **);
  61         va_end(ap);
  62
  63         return execve(name, __UNCONST(&arg), envp);
  64 #else
  65         va_list ap;
  66         char **argv, **envp;
  67         int i;
  68
  69         va_start(ap, arg);
  70         for (i = 2; va_arg(ap, char *) != NULL; i++)
  71                 continue;
  72         va_end(ap);
  73
  74         argv = alloca(i * sizeof (char *));
  75
  76         va_start(ap, arg);
  77         argv[0] = __UNCONST(arg);
  78         for (i = 1; (argv[i] = va_arg(ap, char *)) != NULL; i++)
  79                 continue;
  80         envp = va_arg(ap, char **);
  81         va_end(ap);
  82
  83         return execve(name, argv, envp);
  84 #endif
  85 }