361 lines
11 KiB
C
361 lines
11 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* Test Name : readlink03
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*
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* Test Description :
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* Verify that,
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* 1) readlink(2) returns -1 and sets errno to EACCES if search/write
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* permission is denied in the directory where the symbolic link
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* resides.
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* 2) readlink(2) returns -1 and sets errno to EINVAL if the buffer size
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* is not positive.
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* 3) readlink(2) returns -1 and sets errno to EINVAL if the specified
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* file is not a symbolic link file.
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* 4) readlink(2) returns -1 and sets errno to ENAMETOOLONG if the
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* pathname component of symbolic link is too long (ie, > PATH_MAX).
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* 5) readlink(2) returns -1 and sets errno to ENOENT if the component of
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* symbolic link points to an empty string.
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*
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* Expected Result:
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* readlink() should fail with return value -1 and set expected errno.
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*
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* Algorithm:
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* Setup:
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* Setup signal handling.
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* Create temporary directory.
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* Pause for SIGUSR1 if option specified.
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*
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* Test:
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* Loop if the proper options are given.
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* Execute system call
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* Check return code, if system call failed (return=-1)
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* if errno set == expected errno
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* Issue sys call fails with expected return value and errno.
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* Otherwise,
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* Issue sys call fails with unexpected errno.
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* Otherwise,
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* Issue sys call returns unexpected value.
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*
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* Cleanup:
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* Print errno log and/or timing stats if options given
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* Delete the temporary directory(s)/file(s) created.
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*
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* Usage: <for command-line>
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* readlink03 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -e : Turn on errno logging.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* HISTORY
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* 07/2001 Ported by Wayne Boyer
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*
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* RESTRICTIONS:
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* This test should be executed by 'non-super-user' only.
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*/
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#include <sys/types.h>
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#include <sys/fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/stat.h>
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#include "test.h"
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#include "usctest.h"
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#define MODE_RWX S_IRWXU | S_IRWXG | S_IRWXO
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#define FILE_MODE S_IRUSR | S_IRGRP | S_IROTH
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#define DIR_TEMP "testdir_1"
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#define TESTFILE "testfile"
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#define TEST_FILE1 "testdir_1/tfile_1"
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#define SYM_FILE1 "testdir_1/sfile_1"
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#define TEST_FILE2 "tfile_2"
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#define SYM_FILE2 "sfile_2"
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#define MAX_SIZE 256
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const char *TCID="readlink03"; /* Test program identifier. */
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int TST_TOTAL=5; /* Total number of test cases. */
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extern int Tst_count; /* Test Case counter for tst_* routines */
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int exp_enos[]={EACCES, EINVAL, ENAMETOOLONG, ENOENT, 0};
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int no_setup();
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int setup1(); /* setup function to test symlink for EACCES */
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int setup2(); /* setup function to test symlink for EEXIST */
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int lpath_setup(); /* setup function to test chmod for ENAMETOOLONG */
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char Longpathname[PATH_MAX+2];
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struct test_case_t { /* test case struct. to hold ref. test cond's*/
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const char *link;
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const char *desc;
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int exp_errno;
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size_t buf_siz;
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int (*setupfunc)();
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} Test_cases[] = {
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#ifndef __CYGWIN__
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{ SYM_FILE1, "No Search permissions to process", EACCES, 1, setup1 },
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{ SYM_FILE2, "Buffer size is not positive", EINVAL, -1, setup2 },
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{ TEST_FILE2, "File is not symbolic link", EINVAL, 1, no_setup },
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#else
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{ TEST_FILE2, "File is not symbolic link", EINVAL, 1, setup2 },
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#endif
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{ Longpathname, "Symlink path too long", ENAMETOOLONG, 1, lpath_setup },
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{ "", "Symlink Pathname is empty", ENOENT, 1, no_setup },
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{ NULL, NULL, 0, 0, no_setup }
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};
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extern void setup(); /* Setup function for the test */
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void cleanup() __attribute__((noreturn));/* Cleanup function for the test */
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int
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main(int ac, char **av)
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{
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char buffer[MAX_SIZE]; /* temporary buffer to hold symlink contents*/
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int lc; /* loop counter */
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const char *msg; /* message returned from parse_opts */
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const char *sym_file; /* symbolic link file name */
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const char *test_desc; /* test specific error message */
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int i; /* counter to test different test conditions */
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size_t buf_size; /* size of buffer for readlink */
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/* Parse standard options given to run the test. */
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msg = parse_opts(ac, av, (option_t *)NULL, NULL);
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if (msg != (char *)NULL) {
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tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
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}
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/*
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* Invoke setup function to call individual test setup functions
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* to simulate test conditions.
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*/
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setup();
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/* set the expected errnos... */
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TEST_EXP_ENOS(exp_enos);
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/* Check looping state if -i option given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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/* Reset Tst_count in case we are looping. */
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Tst_count=0;
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for (i = 0; Test_cases[i].desc != NULL; i++) {
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sym_file = Test_cases[i].link;
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test_desc = Test_cases[i].desc;
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buf_size = Test_cases[i].buf_siz;
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if (buf_size == 1) {
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buf_size = sizeof(buffer);
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}
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/*
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* Call readlink(2) to test different test conditions.
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* verify that it fails with -1 return value and sets
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* appropriate errno.
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*/
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TEST(readlink(sym_file, buffer, buf_size));
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/* Check return code of readlink(2) */
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if (TEST_RETURN != -1) {
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tst_resm(TFAIL, "readlink() returned %d, "
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"expected -1, errno:%d", TEST_RETURN,
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Test_cases[i].exp_errno);
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continue;
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}
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TEST_ERROR_LOG(TEST_ERRNO);
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if (TEST_ERRNO == Test_cases[i].exp_errno) {
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tst_resm(TPASS, "readlink(), %s, returned "
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"errno %d", test_desc, TEST_ERRNO);
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tst_resm(TPASS, "readlink(), %s, returned "
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"errno %d", test_desc, TEST_ERRNO);
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} else {
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tst_resm(TFAIL, "readlink() failed, %s, "
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"errno=%d, expected errno=%d",
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test_desc, TEST_ERRNO,
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Test_cases[i].exp_errno);
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}
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} /* End of TEST CASE LOOPING. */
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} /* End for TEST_LOOPING */
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/* Call cleanup() to undo setup done for the test. */
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cleanup();
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/*NOTREACHED*/
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} /* End main */
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/*
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* setup() - performs all ONE TIME setup for this test.
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*
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* Create a temporary directory and change directory to it.
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* Call test specific setup functions.
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*/
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void
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setup()
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{
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int i;
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/* make sure test is not being run as root */
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if (0 == geteuid()) {
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tst_brkm(TBROK, tst_exit, "Must not run test as root");
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}
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/* capture signals */
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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/* Pause if that option was specified */
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TEST_PAUSE;
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/* make a temp directory and cd to it */
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tst_tmpdir();
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/* call individual setup functions */
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for (i = 0; Test_cases[i].desc != NULL; i++) {
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Test_cases[i].setupfunc();
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}
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}
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/*
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* no_setup() - Some test conditions for readlink(2) do not any setup.
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*/
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int
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no_setup()
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{
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return 0;
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}
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/*
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* setup1() - setup function for a test condition for which readlink(2)
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* returns -1 and sets errno to EACCES.
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*
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* Create a test directory under temporary directory and create a test file
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* under this directory with mode "0666" permissions.
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* Create a symlink of testfile under test directory.
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* Modify the mode permissions on test directory such that process will not
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* have search permissions on test directory.
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*/
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int
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setup1()
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{
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int fd; /* file handle for testfile */
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if (mkdir(DIR_TEMP, MODE_RWX) < 0) {
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tst_brkm(TBROK, cleanup, "mkdir(2) of %s failed", DIR_TEMP);
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}
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if ((fd = open(TEST_FILE1, O_RDWR|O_CREAT, 0666)) == -1) {
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tst_brkm(TBROK, cleanup,
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"open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s",
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TEST_FILE1, errno, strerror(errno));
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}
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if (close(fd) == -1) {
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tst_brkm(TBROK, cleanup, "close(%s) failed, errno=%d : %s",
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TEST_FILE1, errno, strerror(errno));
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}
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/* Creat a symbolic link of testfile under test directory */
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if (symlink(TEST_FILE1, SYM_FILE1) < 0) {
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tst_brkm(TBROK, cleanup, "symlink of %s failed", TEST_FILE1);
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}
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/* Modify mode permissions on test directory */
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if (chmod(DIR_TEMP, FILE_MODE) < 0) {
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tst_brkm(TBROK, cleanup, "chmod(2) of %s failed", DIR_TEMP);
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}
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return 0;
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}
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/*
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* setup2() - setup function for a test condition for which readlink(2)
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* returns -1 and sets errno to EINVAL.
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*
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* Create a testfile under temporary directory and create a symlink
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* file of it.
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*/
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int
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setup2()
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{
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int fd; /* file handle for testfile */
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/* Creat a testfile and close it */
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if ((fd = open(TEST_FILE2, O_RDWR|O_CREAT, 0666)) == -1) {
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tst_brkm(TBROK, cleanup,
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"open(%s, O_RDWR|O_CREAT, 0666) failed, errno=%d : %s",
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TEST_FILE2, errno, strerror(errno));
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}
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if (close(fd) == -1) {
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tst_brkm(TBROK, cleanup, "close(%s) failed, errno=%d : %s",
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TEST_FILE2, errno, strerror(errno));
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}
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/* Creat a symlink of testfile created above */
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if (symlink(TEST_FILE2, SYM_FILE2) < 0) {
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tst_brkm(TBROK, cleanup, "symlink() failed to create %s in "
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"setup2, error=%d", SYM_FILE2, errno);
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}
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return 0;
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}
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/*
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* lpath_setup() - setup to create a node with a name length exceeding
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* the MAX. length of PATH_MAX.
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*/
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int
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lpath_setup()
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{
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int i; /* counter variable */
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for (i = 0; i <= (PATH_MAX + 1); i++) {
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Longpathname[i] = 'a';
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}
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return 0;
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}
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/*
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* cleanup() - performs all ONE TIME cleanup for this test at
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* completion or premature exit.
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*
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* Restore the mode permissions on test directory.
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* Remove the temporary directory created in the setup.
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*/
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void
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cleanup()
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{
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/*
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* print timing stats if that option was specified.
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* print errno log if that option was specified.
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*/
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TEST_CLEANUP;
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/* Restore mode permissions on test directory created in setup2() */
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if (chmod(DIR_TEMP, MODE_RWX) < 0) {
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tst_brkm(TBROK, NULL, "chmod(2) of %s failed", DIR_TEMP);
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}
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/* Remove tmp dir and all files in it */
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tst_rmdir();
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/* exit with return code appropriate for results */
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tst_exit();
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}
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