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Diffstat (limited to 'winsup/testsuite/winsup.api/ltp/write03.c')
| -rw-r--r-- | winsup/testsuite/winsup.api/ltp/write03.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/winsup/testsuite/winsup.api/ltp/write03.c b/winsup/testsuite/winsup.api/ltp/write03.c new file mode 100644 index 000000000..5343c6484 --- /dev/null +++ b/winsup/testsuite/winsup.api/ltp/write03.c @@ -0,0 +1,193 @@ +/* + * + * 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 + */ + +/* + * NAME + * write03.c + * + * DESCRIPTION + * Testcase to check that write(2) doesn't corrupt a file when it fails + * + * ALGORITHM + * Create a file for writing, write 100 bytes to it. Then make write(2) + * fail with some erroneous parameter, close the fd. Then reopen the + * file in RDONLY mode, and read the contents of the file. Compare the + * buffers, to see whether they are same. + * + * USAGE: <for command-line> + * write03 [-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 + * + * Restrictions + * NONE + */ + +#include <unistd.h> +#include <string.h> +#include <fcntl.h> +#include <errno.h> +#include <test.h> +#include <usctest.h> + +/* 0 terminated list of expected errnos */ +int exp_enos[] = {14,0}; + +char *TCID = "write03"; +int TST_TOTAL = 1; +extern int Tst_count; + +void setup(void); +void cleanup(void); + +int fd = -1; +char filename[100]; + +main(int argc, char **argv) +{ + int lc; /* loop counter */ + const char *msg; /* message returned from parse_opts */ + + char wbuf[BUFSIZ], rbuf[BUFSIZ]; + + /* parse standard options */ + if ((msg = parse_opts(argc, argv, (option_t *)NULL, NULL)) != + (char *)NULL) { + tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg); + /*NOTREACHED*/ + } + + /* 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 to check if write " + "corrupts the file when write fails"); + + fd = creat(filename, 0644); + if (fd < 0) { + tst_resm(TBROK, "creating a new file failed"); + cleanup(); + /*NOTREACHED*/ + } + + (void)memset(wbuf, '0', 100); + + if (write(fd, wbuf, 100) == -1) { + tst_resm(TFAIL, "failed to write to %s", filename); + cleanup(); + /*NOTREACHED*/ + } + + if (write(fd, (void *)-1, 100) != -1) { + tst_resm(TFAIL, "write(2) failed to fail"); + cleanup(); + /*NOTREACHED*/ + } + TEST_ERROR_LOG(errno); + close(fd); + fd = -1; + + if ((fd = open(filename, O_RDONLY)) == -1) { + tst_resm(TBROK, "open(2) failed, errno: %d", errno); + cleanup(); + /*NOTREACHED*/ + } + + if (read(fd, rbuf, 100) == -1) { + tst_resm(TBROK, "read(2) failed, errno: %d", errno); + cleanup(); + /*NOTREACHED*/ + } + + if (memcmp(wbuf, rbuf, 100) == 0) { + tst_resm(TPASS, "failure of write(2) didnot corrupt " + "the file"); + } else { + tst_resm(TFAIL, "failure of write(2) corrupted the " + "file"); + } + tst_resm(TINFO, "Exit block 1"); + } + cleanup(); + /*NOTREACHED*/ +} + +/* + * setup() - performs all ONE TIME setup for this test + */ +void +setup(void) +{ + /* capture signals */ + 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, "./write03.%d", getpid()); +} + +/* + * 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; + + if (fd >= 0) + close (fd); + + unlink(filename); + tst_rmdir(); + + /* exit with return code appropriate for results */ + tst_exit(); + /*NOTREACHED*/ +} |