glibc/posix/execveat.c
Alexandra Hájková 19d83270fc linux: Add execveat system call wrapper
It operates similar to execve and it is is already used to implement
fexecve without requiring /proc to be mounted.  However, different
than fexecve, if the syscall is not supported by the kernel an error
is returned instead of trying a fallback.

Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2021-05-03 16:46:06 -03:00

42 lines
1.4 KiB
C

/* Execute program relative to a directory file descriptor.
Copyright (C) 2021 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, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stddef.h>
#include <unistd.h>
/* Replace the current process, executing PATH relative to difrd with
arguments argv and environment envp.
argv and envp are terminated by NULL pointers. */
int
__execveat (int dirfd, const char *path, char *const argv[], char *const envp[],
int flags)
{
if (path == NULL || argv == NULL || envp == NULL)
{
__set_errno (EINVAL);
return -1;
}
__set_errno (ENOSYS);
return -1;
}
stub_warning (execveat)
weak_alias (__execveat, execveat)