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/* execvpe() function: Execute a program, replacing the current process.
Copyright (C) 2020-2021 Free Software Foundation, Inc.
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 <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2020. */
/* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
may optimize away the program == NULL and argv == NULL tests below. */
#define _GL_ARG_NONNULL(params)
#include <config.h>
/* Specification. */
#include <unistd.h>
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include "findprog.h"
int
execvpe (const char *program, char * const *argv, char * const *env)
{
if (program == NULL
|| argv == NULL
/* The callee is not expecting a NULL argv[0]. */
|| argv[0] == NULL
|| env == NULL)
{
errno = EINVAL;
return -1;
}
const char *resolved_progname =
find_in_given_path (program, getenv ("PATH"), NULL, true);
if (resolved_progname == NULL)
return -1;
/* Invoke execve. */
execve (resolved_progname, argv, env);
/* If execve returned, it must have failed. */
if (resolved_progname != program)
{
int saved_errno = errno;
free ((char *) resolved_progname);
errno = saved_errno;
}
return -1;
}
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