blob: ad36c78bd77f14d3dc412d0e1b399784d9d3cb81 [file] [log] [blame]
/*
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* NAME
* write05.c
*
* DESCRIPTION
* Check the return value, and errnos of write(2)
* - when the file descriptor is invalid - EBADF
* - when the buf parameter is invalid - EFAULT
* - on an attempt to write to a pipe that is not open for reading - EPIPE
*
* ALGORITHM
* Attempt to write on a file with negative file descriptor, check for -1
* Attempt to write on a file with invalid buffer, check for -1
* Open a pipe and close the read end, attempt to write to the write
* end, check for -1.
*
* USAGE: <for command-line>
* write05 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -e : Turn on errno logging.
* -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 John George
* -Ported
* 04/2002 wjhuie sigset cleanups
* 08/2007 Ricardo Salveti de Araujo <rsalveti@linux.vnet.ibm.com>
* - Closing the fd before removing the file
*
* Restrictions
* None
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <wait.h>
#include <sys/mman.h>
#include "test.h"
#include "usctest.h"
void setup(void);
void cleanup(void);
/* 0 terminated list of expected errnos */
int exp_enos[] = { 9, 14, 32, 0 };
char *TCID = "write05"; /* Test program identifier */
int TST_TOTAL = 1; /* Total number of test cases */
char filename[100];
int fd;
char *bad_addr = 0;
int main(int argc, char **argv)
{
int lc;
char *msg;
char pbuf[BUFSIZ];
int pipefildes[2];
int status, pid;
if ((msg = parse_opts(argc, argv, NULL, NULL)) != NULL) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
}
/* global setup */
setup();
/* The following loop checks looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset tst_count in case we are looping */
tst_count = 0;
//block1:
tst_resm(TINFO, "Enter Block 1: test with bad fd");
if (write(-1, pbuf, 1) != -1) {
tst_resm(TFAIL, "write of invalid fd passed");
} else {
TEST_ERROR_LOG(errno);
if (errno != EBADF) {
tst_resm(TFAIL, "expected EBADF got %d", errno);
}
tst_resm(TPASS, "received EBADF as expected.");
}
tst_resm(TINFO, "Exit Block 1");
//block2:
tst_resm(TINFO, "Enter Block 2: test with a bad address");
fd = creat(filename, 0644);
if (fd < 0) {
tst_resm(TFAIL, "creating a new file failed");
cleanup();
}
if (write(fd, bad_addr, 10) != -1) {
tst_resm(TFAIL, "write() on an invalid buffer "
"succeeded, but should have failed");
cleanup();
} else {
TEST_ERROR_LOG(errno);
if (errno != EFAULT) {
tst_resm(TFAIL, "write() returned illegal "
"errno: expected EFAULT, got %d",
errno);
cleanup();
}
tst_resm(TPASS, "received EFAULT as expected.");
}
tst_resm(TINFO, "Exit Block 2");
//block3:
tst_resm(TINFO, "Enter Block 3: test with invalid pipe");
if ((pid = FORK_OR_VFORK()) == 0) { /* child */
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) {
tst_resm(TINFO, "signal failed");
}
if (pipe(pipefildes) == -1) {
tst_brkm(TBROK, NULL, "can't open pipe");
exit(errno);
}
close(pipefildes[0]);
if (write(pipefildes[1], pbuf, 1) != -1) {
tst_resm(TFAIL, "write on read-closed"
"pipe succeeded");
exit(-1);
} else {
if (errno != EPIPE) {
tst_resm(TFAIL, "write() failed to set"
" errno to EPIPE, got: %d",
errno);
exit(errno);
}
exit(0);
}
} else {
if (pid < 0) {
tst_resm(TFAIL, "Fork failed");
}
wait(&status);
if (WIFSIGNALED(status) == SIGPIPE) {
tst_resm(TFAIL, "child set SIGPIPE in exit");
} else if (WEXITSTATUS(status) != 0) {
TEST_ERROR_LOG(WEXITSTATUS(status));
tst_resm(TFAIL, "exit status from child "
"expected 0 got %d", status >> 8);
} else {
TEST_ERROR_LOG(EPIPE);
tst_resm(TPASS, "received EPIPE as expected.");
}
tst_resm(TINFO, "Exit Block 3");
}
close(fd);
}
cleanup();
tst_exit();
}
/*
* setup()
* performs all ONE TIME setup for this test
*/
void setup(void)
{
tst_sig(FORK, DEF_HANDLER, cleanup);
/* Set up the expected error numbers for -e option */
TEST_EXP_ENOS(exp_enos);
/* Pause if that option was specified
* TEST_PAUSE contains the code to fork the test with the -i option.
* You want to make sure you do this before you create your temporary
* directory.
*/
TEST_PAUSE;
/* Create a unique temporary directory and chdir() to it. */
tst_tmpdir();
sprintf(filename, "write05.%d", getpid());
bad_addr = mmap(0, 1, PROT_NONE,
MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
if (bad_addr == MAP_FAILED) {
printf("mmap failed\n");
}
}
/*
* cleanup()
* performs all ONE TIME cleanup for this test at
* completion or premature exit
*/
void cleanup(void)
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* Close the file descriptor befor removing the file */
close(fd);
unlink(filename);
tst_rmdir();
}