diff options
Diffstat (limited to 'winsup/testsuite/winsup.api/ltp/fork10.c')
| -rw-r--r-- | winsup/testsuite/winsup.api/ltp/fork10.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/winsup/testsuite/winsup.api/ltp/fork10.c b/winsup/testsuite/winsup.api/ltp/fork10.c new file mode 100644 index 000000000..09de7c06f --- /dev/null +++ b/winsup/testsuite/winsup.api/ltp/fork10.c @@ -0,0 +1,215 @@ +/* + * + * 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 + * fork04.c + * + * DESCRIPTION + * Check inheritance of file descriptor by children, they + * should all be refering to the same file. + * + * ALGORITHM + * Child reads several chars and exits. + * Parent forks another child, have the child and parent attempt to use + * that location + * + * USAGE + * fork04 + * + * HISTORY + * 07/2001 Ported by Wayne Boyer + * + * RESTRICTIONS + * None + */ + +#include <stdio.h> +#include <errno.h> +#include "test.h" +#include "usctest.h" + +char *TCID = "fork04"; +int TST_TOTAL = 1; +extern int Tst_count; + +void setup(void); +void cleanup(void); + +char pidbuf[10]; +char fnamebuf[40]; + +main(int ac, char **av) +{ + int status, pid, fildes; + char parchar[2]; + char chilchar[2]; + long lseek(); + + int lc; /* loop counter */ + const char *msg; /* message returned from parse_opts */ + + /* + * parse standard options + */ + if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){ + tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg); + /*NOTREACHED*/ + } + + /* + * perform global setup for the test + */ + setup(); + + /* + * check looping state if -i option is given + */ + for (lc = 0; TEST_LOOPING(lc); lc++) { + /* + * reset Tst_count in case we are looping. + */ + Tst_count = 0; + + if ((fildes = creat(fnamebuf, 0600)) < 0) { + tst_brkm(TBROK, cleanup, "Parent: cannot open %s for " + "write, errno = %d", fnamebuf, errno); + /*NOTREACHED*/ + } + write(fildes, "ABCDEFGHIJKLMNOPQRSTUVWXYZ\n", 27); + close(fildes); + + if ((fildes = open(fnamebuf, 0)) == -1) { + tst_brkm(TBROK, cleanup, "Parent: cannot open %s for " + "reading", fnamebuf); + /*NOTREACHED*/ + } + + if ((pid = fork()) == -1) { + tst_brkm(TBROK, cleanup, "fork() #1 failed"); + /*NOTREACHED*/ + } + + if (pid == 0) { /* child */ + tst_resm(TINFO, "fork child A"); + if (lseek(fildes, 10L, 0) == -1L) { + tst_resm(TFAIL, "bad lseek by child"); + exit(1); + } + exit(0); + } else { /* parent */ + wait(&status); + + /* parent starts second child */ + if ((pid = fork()) == -1) { + tst_brkm(TBROK, cleanup, "fork() #2 failed"); + /*NOTREACHED*/ + } + + if (pid == 0) { /* child */ + if (read(fildes, chilchar, 1) <= 0) { + tst_resm(TFAIL, "Child can't read " + "file"); + exit(1); + } else { + if (chilchar[0] != 'K') { + chilchar[1] = '\n'; + exit(1); + } else { + exit(0); + } + } + } else { /* parent */ + (void)wait(&status); + if (status >> 8 != 0) { + tst_resm(TFAIL, "Bad return from " + "second child"); + continue; + } + /* parent reads */ + if (read(fildes, parchar, 1) <= 0) { + tst_resm(TFAIL, "Parent cannot read " + "file"); + continue; + } else { + write(fildes, parchar, 1); + if (parchar[0] != 'L') { + parchar[1] = '\n'; + tst_resm(TFAIL, "Test failed"); + continue; + } + } + } + } + tst_resm(TPASS, "test 1 PASSED"); + close (fildes); + } + cleanup(); + + /*NOTREACHED*/ +} + +/* + * setup() - performs all ONE TIME setup for this test + */ +void +setup() +{ + /* + * capture signals + */ + tst_sig(FORK, DEF_HANDLER, cleanup); + + umask(0); + + /* + * Pause if that option was specified + */ + TEST_PAUSE; + + /* + * make a temp directory and cd to it + */ + tst_tmpdir(); + + strcpy(fnamebuf, "fork04."); + sprintf(pidbuf, "%d", getpid()); + strcat(fnamebuf, pidbuf); +} + +/* + * cleanup() - performs all ONE TIME cleanup for this test at + * completion or premature exit + */ +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(); + + tst_exit(); +} |