selftests/exec/execveat.c

204 	 * a script or not (because the interpreter sees a filename like
219 	 * Execute as a long pathname relative to "/".  If this is a script,
220 	 * the interpreter will launch but fail to open the script because its
229 		ksft_print_msg("Invoke script via root_dfd and relative filename\n");
244 	char *fullname_script = realpath("script", NULL);
259 	int fd_script = open_or_die("script", O_RDONLY);
263 	int fd_script_ephemeral = open_or_die("script.ephemeral", O_RDONLY);
265 	int fd_script_cloexec = open_or_die("script", O_RDONLY|O_CLOEXEC);
336 	/* Shell script wrapping executable file: */
338 	fail += check_execveat(subdir_dfd, "../script", 0);
339 	fail += check_execveat(dot_dfd, "script", 0);
340 	fail += check_execveat(dot_dfd_path, "script", 0);
347 	/*   O_CLOEXEC fd fails for a script (as script file inaccessible) */
350 	fail += check_execveat_fail(dot_dfd_cloexec, "script", 0, ENOENT);
352 	/* Mess with script file that's already open: */
354 	rename("script.ephemeral", "script.moved");
357 	unlink("script.moved"); /* remove the file while fd open */
362 	fail += check_execveat(subdir_dfd_ephemeral, "../script", 0);
363 	fail += check_execveat(subdir_dfd_ephemeral, "script", 0);
365 	unlink("subdir.moved/script");
368 	fail += check_execveat(subdir_dfd_ephemeral, "../script", 0);
369 	fail += check_execveat_fail(subdir_dfd_ephemeral, "script", 0, ENOENT);
391 	fail += check_execveat_pathmax(root_dfd, "script", 1);
398 	const char *script = "#!/bin/bash\nexit $*\n";
403 	exe_cp("script", "script.ephemeral");
406 	fd = open("subdir.ephemeral/script", O_RDWR|O_CREAT|O_TRUNC, 0755);
407 	write(fd, script, strlen(script));