testcases/kernel/syscalls/ftruncate/ftruncate03.c

/*
 *
 *   Copyright (c) International Business Machines  Corp., 2002
 *
 *   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/*
 * Test Name: ftruncate03
 *
 * Test Description:
 *  Verify that,
 *  1) ftruncate(2) returns -1 and sets errno to EINVAL if the specified
 *     socket is invalid.
 *  2) ftruncate(2) returns -1 and sets errno to EINVAL if the specified
 *     file descriptor has an attempt to write, when open for read only.
 *  3) ftruncate(2) returns -1 and sets errno to EBADF if the file descriptor
 *     of the specified file is not valid.
 *
 * Expected Result:
 *  ftruncate() should fail with return value -1 and set expected errno.
 *
 * HISTORY
 *      02/2002 Written by Jay Huie
 *	02/2002 Adapted for and included into the LTP by Robbie Williamson
 *
 * RESTRICTIONS:
 *  This test should be run by 'non-super-user' only.
 *
 */

#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <inttypes.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/fcntl.h>

#include "test.h"

#define TESTFILE	"ftruncate03_tst_file"

TCID_DEFINE(ftruncate03);
int TST_TOTAL = 3;

int main(void)
{
	int wjh_ret = -1, wjh_f = -1, count = 0;
	//used for the 2nd test
	//make str > trunc_size characters long
	char str[] = "THIS IS JAYS TEST FILE DATA";
	int trunc_size = 4;
	int flag = O_RDONLY;

#ifdef DEBUG
	printf("Starting test, possible errnos are; EBADF(%d) EINVAL(%d)\n",
	       EBADF, EINVAL);
	printf("\t\tENOENT(%d) EACCES(%d) EPERM(%d)\n\n", ENOENT, EACCES,
	       EPERM);
#endif

	tst_tmpdir();

//TEST1: ftruncate on a socket is not valid, should fail w/ EINVAL

#ifdef DEBUG
	printf("Starting test1\n");
#endif
	wjh_f = socket(PF_INET, SOCK_STREAM, 0);
	wjh_ret = ftruncate(wjh_f, 1);
#ifdef DEBUG
	printf("DEBUG: fd: %d ret: %d errno(%d) %s\n",
	       wjh_f, wjh_ret, errno, strerror(errno));
#endif
	if (wjh_ret == -1 && errno == EINVAL) {
		tst_resm(TPASS, "Test Passed");
	} else {
		tst_resm(TFAIL,
			 "ftruncate(socket)=%i (wanted -1), errno=%i (wanted EINVAL %i)",
			 wjh_ret, errno, EINVAL);
	}
	close(wjh_f);
	errno = 0;
	wjh_ret = 0;
	wjh_f = -1;

//TEST2: ftruncate on fd not open for writing should be EINVAL

#ifdef DEBUG
	printf("\nStarting test2\n");
#endif
	//create a file and fill it so we can truncate it in ReadOnly mode
	//delete it first, ignore if it doesn't exist
	unlink(TESTFILE);
	errno = 0;
	wjh_f = open(TESTFILE, O_RDWR | O_CREAT, 0644);
	if (wjh_f == -1) {
		tst_brkm(TFAIL | TERRNO, tst_rmdir, "open(%s) failed",
			 TESTFILE);
	}
	while (count < strlen(str)) {
		if ((count += write(wjh_f, str, strlen(str))) == -1) {
			tst_resm(TFAIL | TERRNO, "write() failed");
			close(wjh_f);
			tst_rmdir();
			tst_exit();
		}
	}
	close(wjh_f);
	errno = 0;

//Uncomment below if you want it to succeed, O_RDWR => success
// flag = O_RDWR;
#ifdef DEBUG
	if (flag == O_RDWR) {
		printf("\tLooks like it should succeed!\n");
	}
#endif

	wjh_f = open(TESTFILE, flag);
	if (wjh_f == -1) {
		tst_brkm(TFAIL | TERRNO, tst_rmdir, "open(%s) failed",
			 TESTFILE);
	}
	wjh_ret = ftruncate(wjh_f, trunc_size);
#ifdef DEBUG
	printf("DEBUG: fd: %d ret: %d @ errno(%d) %s\n",
	       wjh_f, wjh_ret, errno, strerror(errno));
#endif
	if ((flag == O_RDONLY) && (wjh_ret == -1) && (errno == EINVAL)) {
		tst_resm(TPASS, "Test Passed");
	} else if ((flag == O_RDWR)) {
		if (wjh_ret == 0) {
			tst_resm(TPASS, "Test Succeeded!");
		} else {
			tst_resm(TFAIL | TERRNO,
				 "ftruncate(%s) should have succeeded, but didn't! ret="
				 "%d (wanted 0)", TESTFILE, wjh_ret);
		}
	} else			//flag was O_RDONLY but return codes wrong
	{
		tst_resm(TFAIL,
			 "ftruncate(rd_only_fd)=%i (wanted -1), errno=%i (wanted %i EINVAL)",
			 wjh_ret, errno, EINVAL);
	}
	close(wjh_f);
	errno = 0;
	wjh_ret = 0;
	wjh_f = -1;

//TEST3: invalid socket descriptor should fail w/ EBADF

#ifdef DEBUG
	printf("\nStarting test3\n");
#endif
	wjh_f = -999999;	//should be a bad file descriptor
	wjh_ret = ftruncate(wjh_f, trunc_size);
#ifdef DEBUG
	printf("DEBUG: fd: %d ret: %d @ errno(%d) %s\n",
	       wjh_f, wjh_ret, errno, strerror(errno));
#endif
	if (wjh_ret != -1 || errno != EBADF) {
		tst_resm(TFAIL | TERRNO,
			 "ftruncate(invalid_fd)=%d (wanted -1 and EBADF)",
			 wjh_ret);
	} else {
		tst_resm(TPASS, "Test Passed");
	}

	tst_rmdir();

//Done Testing
	tst_exit();
}