| /* |
| * |
| * 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 |
| * fcntl12.c |
| * |
| * DESCRIPTION |
| * Testcase to test that fcntl() sets EMFILE for F_DUPFD command. |
| * |
| * ALGORITHM |
| * Get the size of the descriptor table of a process, by calling the |
| * getdtablesize() system call. Then attempt to use the F_DUPFD command |
| * for fcntl(), which should fail with EMFILE. |
| * |
| * USAGE |
| * fcntl12 |
| * |
| * HISTORY |
| * 07/2001 Ported by Wayne Boyer |
| * |
| * RESTRICTIONS |
| * NONE |
| */ |
| |
| #include <fcntl.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <errno.h> |
| #include "test.h" |
| #include "usctest.h" |
| |
| char *TCID = "fcntl12"; |
| int TST_TOTAL = 1; |
| |
| int fail; |
| char fname[20]; |
| void setup(void); |
| void cleanup(void); |
| |
| int main(int ac, char **av) |
| { |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| |
| pid_t pid; |
| int fd, i, status, max_files; |
| |
| /* parse standard options */ |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) { |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| } |
| |
| setup(); |
| |
| /* check for 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; |
| |
| /* //block1: */ |
| tst_resm(TINFO, "Enter block 1"); |
| tst_resm(TINFO, "Test for errno EMFILE"); |
| fail = 0; |
| |
| pid = FORK_OR_VFORK(); |
| if (pid < 0) { |
| tst_resm(TFAIL, "Fork failed"); |
| cleanup(); |
| } else if (pid == 0) { /* child */ |
| max_files = getdtablesize(); |
| for (i = 0; i < max_files; i++) { |
| if ((fd = open(fname, O_CREAT | O_RDONLY, |
| 0444)) == -1) { |
| break; |
| } |
| } |
| |
| if (fcntl(1, F_DUPFD, 1) != -1) { |
| tst_resm(TFAIL, "fcntl failed to FAIL"); |
| exit(1); |
| } else if (errno != EMFILE) { |
| tst_resm(TFAIL, "Expected EMFILE got %d", |
| errno); |
| exit(1); |
| } |
| exit(0); |
| } |
| waitpid(pid, &status, 0); |
| if (WEXITSTATUS(status) == 0) { |
| tst_resm(TINFO, "block 1 PASSED"); |
| } else { |
| tst_resm(TINFO, "block 1 FAILED"); |
| } |
| tst_resm(TINFO, "Exit block 1"); |
| } |
| cleanup(); |
| tst_exit(); |
| } |
| |
| /* |
| * setup() |
| * performs all ONE TIME setup for this test |
| */ |
| void setup(void) |
| { |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| sprintf(fname, "fcnlt12.%d", getpid()); |
| tst_tmpdir(); |
| } |
| |
| /* |
| * 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; |
| |
| unlink(fname); |
| tst_rmdir(); |
| |
| } |