121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* fcntl12.c
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*
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* DESCRIPTION
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* Testcase to test that fcntl() sets EMFILE for F_DUPFD command.
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*
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* ALGORITHM
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* Get the size of the descriptor table of a process, by calling the
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* getdtablesize() system call. Then attempt to use the F_DUPFD command
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* for fcntl(), which should fail with EMFILE.
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*
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* USAGE
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* fcntl12
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*
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* HISTORY
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* 07/2001 Ported by Wayne Boyer
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*
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* RESTRICTIONS
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* NONE
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*/
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include "test.h"
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char *TCID = "fcntl12";
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int TST_TOTAL = 1;
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int fail;
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char fname[20];
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void setup(void);
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void cleanup(void);
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int main(int ac, char **av)
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{
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int lc;
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pid_t pid;
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int fd, i, status, max_files;
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tst_parse_opts(ac, av, NULL, NULL);
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setup();
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/* check for looping state if -i option is given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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tst_resm(TINFO, "Test for errno EMFILE");
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fail = 0;
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pid = FORK_OR_VFORK();
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if (pid < 0) {
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tst_brkm(TBROK | TERRNO, cleanup, "Fork failed");
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} else if (pid == 0) {
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max_files = getdtablesize();
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for (i = 0; i < max_files; i++) {
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if ((fd = open(fname, O_CREAT | O_RDONLY,
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0444)) == -1) {
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break;
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}
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}
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if (fcntl(1, F_DUPFD, 1) != -1) {
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tst_resm(TFAIL, "fcntl failed to FAIL");
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exit(1);
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} else if (errno != EMFILE) {
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tst_resm(TFAIL, "Expected EMFILE got %d",
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errno);
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exit(1);
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}
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exit(0);
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}
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waitpid(pid, &status, 0);
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if (WEXITSTATUS(status) == 0)
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tst_resm(TPASS, "block 1 PASSED");
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else
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tst_resm(TFAIL, "block 1 FAILED");
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}
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cleanup();
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tst_exit();
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}
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void setup(void)
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{
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tst_sig(FORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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sprintf(fname, "fcnlt12.%d", getpid());
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tst_tmpdir();
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}
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void cleanup(void)
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{
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unlink(fname);
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tst_rmdir();
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}
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