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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667/* * 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_perror("error: unshare"); }
if (mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL) == -1) ksft_exit_fail_perror("error: mount '/'");
/* Require "exec" filesystem. */ if (mount(NULL, "/tmp", "ramfs", 0, NULL) == -1) ksft_exit_fail_perror("error: mount ramfs");
#define FILENAME "/tmp/1"
fd = creat(FILENAME, 0700); if (fd == -1) ksft_exit_fail_perror("error: creat");
#define S "#!" FILENAME "\n" if (write(fd, S, strlen(S)) != strlen(S)) ksft_exit_fail_perror("error: write");
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();}