/* * Copyright (c) 2019 Alexey Dobriyan <adobriyan@gmail.com> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* Test that pointing #! script interpreter to self doesn't recurse. */ #include <errno.h> #include <sched.h> #include <stdio.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/mount.h> #include <unistd.h> #include "../kselftest.h" int main(void) { int fd, rv; ksft_print_header(); ksft_set_plan(1); if (unshare(CLONE_NEWNS) == -1) { if (errno == ENOSYS || errno == EPERM) { ksft_test_result_skip("error: unshare, errno %d\n", errno); ksft_finished(); } ksft_exit_fail_msg("error: unshare, errno %d\n", errno); } if (mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL) == -1) ksft_exit_fail_msg("error: mount '/', errno %d\n", errno); /* Require "exec" filesystem. */ if (mount(NULL, "/tmp", "ramfs", 0, NULL) == -1) ksft_exit_fail_msg("error: mount ramfs, errno %d\n", errno); #define FILENAME "/tmp/1" fd = creat(FILENAME, 0700); if (fd == -1) ksft_exit_fail_msg("error: creat, errno %d\n", errno); #define S "#!" FILENAME "\n" if (write(fd, S, strlen(S)) != strlen(S)) ksft_exit_fail_msg("error: write, errno %d\n", errno); close(fd); rv = execve(FILENAME, NULL, NULL); ksft_test_result(rv == -1 && errno == ELOOP, "execve failed as expected (ret %d, errno %d)\n", rv, errno); ksft_finished(); }