84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Linux Test Project, 2002-2022
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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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*/
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/*\
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* [Description]
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*
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* Verify that unlink(2) fails with
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*
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* - EACCES when no write access to the directory containing pathname
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* - EACCES when one of the directories in pathname did not allow search
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* - EISDIR when deleting directory as root user
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* - EISDIR when deleting directory as non-root user
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*/
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#include <errno.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "tst_test.h"
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static struct passwd *pw;
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static struct test_case_t {
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char *name;
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char *desc;
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int exp_errno;
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int exp_user;
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} tcases[] = {
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{"unwrite_dir/file", "unwritable directory", EACCES, 1},
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{"unsearch_dir/file", "unsearchable directory", EACCES, 1},
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{"regdir", "directory", EISDIR, 0},
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{"regdir", "directory", EISDIR, 1},
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};
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static void verify_unlink(struct test_case_t *tc)
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{
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TST_EXP_FAIL(unlink(tc->name), tc->exp_errno, "%s", tc->desc);
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}
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static void do_unlink(unsigned int n)
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{
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struct test_case_t *cases = &tcases[n];
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pid_t pid;
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if (cases->exp_user) {
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pid = SAFE_FORK();
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if (!pid) {
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SAFE_SETUID(pw->pw_uid);
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verify_unlink(cases);
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exit(0);
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}
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SAFE_WAITPID(pid, NULL, 0);
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} else {
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verify_unlink(cases);
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}
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}
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static void setup(void)
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{
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SAFE_MKDIR("unwrite_dir", 0777);
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SAFE_TOUCH("unwrite_dir/file", 0777, NULL);
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SAFE_CHMOD("unwrite_dir", 0555);
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SAFE_MKDIR("unsearch_dir", 0777);
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SAFE_TOUCH("unsearch_dir/file", 0777, NULL);
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SAFE_CHMOD("unsearch_dir", 0666);
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SAFE_MKDIR("regdir", 0777);
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pw = SAFE_GETPWNAM("nobody");
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}
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static struct tst_test test = {
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.needs_root = 1,
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.forks_child = 1,
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.needs_tmpdir = 1,
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.setup = setup,
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.tcnt = ARRAY_SIZE(tcases),
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.test = do_unlink,
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};
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