1#define _GNU_SOURCE
 2#include <unistd.h>
 3#include <errno.h>
 4#include <fcntl.h>
 5#include "syscall.h"
 6
 7int fexecve(int fd, char *const argv[], char *const envp[])
 8{
 9	int r = __syscall(SYS_execveat, fd, "", argv, envp, AT_EMPTY_PATH);
10	if (r != -ENOSYS) return __syscall_ret(r);
11	char buf[15 + 3*sizeof(int)];
12	__procfdname(buf, fd);
13	execve(buf, argv, envp);
14	if (errno == ENOENT) errno = EBADF;
15	return -1;
16}