View of xos/usr/lib/libc/exec.c

/* Copyright (C) 2008  Emmanuel Varoquaux
 
   This file is part of XOS.
 
   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/>. */
 
#include <unistd.h>
 
#include "xos.h"
#include "misc.h"
 
#include <stdarg.h>
 
static int execve_internal(const char *path, char *const argv[], char *const envp[])
{
  return __syscall_exec(path, argv, envp);
}
 
int __attribute__ ((weak, visibility ("default"))) execve(const char *path, char *const argv[], char *const envp[])
{
  return execve_internal(path, argv, envp);
}
 
int __attribute__ ((weak, visibility ("default"))) execv(const char *path, char *const argv[])
{
  return execve_internal(path, argv, environ);
}
 
int __attribute__ ((weak, visibility ("default"))) execle(const char *path, ...)
{
  const char *argv[1024], *const *envp;
  unsigned int i;
  va_list ap;
 
  va_start(ap, path);
  i = 0;
  do
    argv[i] = va_arg(ap, const char *);
  while (argv[i++]);
  envp = va_arg(ap, const char *const *);
  va_end(ap);
  return execve_internal(path, const_cast(char *const *, argv), const_cast(char *const *, envp));
}
 
int __attribute__ ((weak, visibility ("default"))) execl(const char *path, ...)
{
  const char *argv[1024];
  unsigned int i;
  va_list ap;
 
  va_start(ap, path);
  i = 0;
  do
    argv[i] = va_arg(ap, const char *);
  while (argv[i++]);
  va_end(ap);
  return execve_internal(path, const_cast(char *const *, argv), environ);
}