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/*
*
* Copyright (c) International Business Machines Corp., 2001
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Test Name : readlink01
*
* Test Description :
* Verify that, readlink will succeed to read the contents of the symbolic
* link created the process.
*
* Expected Result:
* readlink() should return the contents of symbolic link path in the buffer
* on success.
*
* Algorithm:
* Setup:
* Setup signal handling.
* Create temporary directory.
* Pause for SIGUSR1 if option specified.
*
* Test:
* Loop if the proper options are given.
* Execute system call
* Check return code, if system call failed (return=-1)
* Issue a FAIL message.
* Otherwise,
* Verify the Functionality of system call
* if successful,
* Issue Functionality-Pass message.
* Otherwise,
* Issue Functionality-Fail message.
* Cleanup:
* Print errno log and/or timing stats if options given
* Delete the temporary directory created.
*
* Usage: <for command-line>
* readlink01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -f : Turn off functionality Testing.
* -i n : Execute test n times.
* -I x : Execute test for x seconds.
* -P x : Pause for x seconds between iterations.
* -t : Turn on syscall timing.
*
* HISTORY
* 07/2001 Ported by Wayne Boyer
*
* RESTRICTIONS:
* This test should be run by 'non-super-user' only.
*
*/
#include <fcntl.h>
#include <errno.h>
#include <sys/stat.h>
#include "test.h"
#include "usctest.h"
#define TESTFILE "testfile"
#define SYMFILE "slink_file"
#define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
#define MAX_SIZE 256
const char *TCID="readlink01"; /* Test program identifier. */
int TST_TOTAL=1; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
int exp_val; /* strlen of testfile */
void setup(); /* Setup function for the test */
void cleanup(void) __attribute__((noreturn)); /* Cleanup function for the test */
int
main(int ac, char **av)
{
char buffer[MAX_SIZE]; /* temporary buffer to hold symlink contents*/
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
/* Parse standard options given to run the test. */
msg = parse_opts(ac, av, (option_t *)NULL, NULL);
if (msg != (char *)NULL) {
tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
}
/* Perform global setup for test */
setup();
/* Check looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* Reset Tst_count in case we are looping. */
Tst_count=0;
/*
* Call readlink(2) to read the contents of
* symlink into a buffer.
*/
TEST(readlink(SYMFILE, buffer, sizeof(buffer)));
/* Check return code of readlink(2) */
if (TEST_RETURN == -1) {
tst_resm(TFAIL, "readlink() on %s failed, errno=%d : %s"
, SYMFILE, TEST_ERRNO, strerror(TEST_ERRNO));
continue;
}
/*
* Perform functional verification if test
* executed without (-f) option.
*/
if (STD_FUNCTIONAL_TEST) {
/*
* Compare the return value of readlink()
* with the expected value which is the
* strlen() of testfile.
*/
if (TEST_RETURN == exp_val) {
/* Check for the contents of buffer */
if (memcmp(buffer, TESTFILE, exp_val) != 0) {
tst_resm(TFAIL, "Pathname %s and buffer"
" contents %s differ",
TESTFILE, buffer);
} else {
tst_resm(TPASS, "readlink() "
"functionality on '%s' is "
"correct", SYMFILE);
}
} else {
tst_resm(TFAIL, "readlink() return value %d "
"does't match, Expected %d",
TEST_RETURN, exp_val);
}
} else {
tst_resm(TPASS, "call succeeded");
}
} /* End for TEST_LOOPING */
/* Call cleanup() to undo setup done for the test. */
cleanup();
/*NOTREACHED*/
} /* End main */
/*
* setup() - performs all ONE TIME setup for this test.
*
* Create a temporary directory and change directory to it.
* Create a test file under temporary directory and close it
* Create a symbolic link of testfile.
*/
void
setup()
{
int fd; /* file handle for testfile */
/* make sure test is not being run as root */
if (0 == geteuid()) {
tst_brkm(TBROK, tst_exit, "Must not run test as root");
}
/* capture signals */
tst_sig(NOFORK, DEF_HANDLER, cleanup);
/* Pause if that option was specified */
TEST_PAUSE;
/* make a temp directory and cd to it */
tst_tmpdir();
if ((fd = open(TESTFILE, O_RDWR|O_CREAT, FILE_MODE)) == -1) {
tst_brkm(TBROK, cleanup,
"open(%s, O_RDWR|O_CREAT, %#o) failed, errno=%d : %s",
TESTFILE, FILE_MODE, errno, strerror(errno));
}
if (close(fd) == -1) {
tst_resm(TWARN, "close(%s) Failed, errno=%d : %s",
TESTFILE, errno, strerror(errno));
}
/* Create a symlink of testfile under temporary directory */
if (symlink(TESTFILE, SYMFILE) < 0) {
tst_brkm(TBROK, cleanup,
"symlink(%s, %s) failed, errno=%d : %s",
TESTFILE, SYMFILE, errno, strerror(errno));
}
/* Get the strlen of testfile */
exp_val = strlen(TESTFILE);
}
/*
* cleanup() - performs all ONE TIME cleanup for this test at
* completion or premature exit.
*
* Remove the test directory and testfile created in the setup.
*/
void
cleanup()
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* Remove tmp dir and all files in it */
tst_rmdir();
/* exit with return code appropriate for results */
tst_exit();
}
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