135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2002
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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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/* Ported from SPIE, section2/iosuite/dup6.c, by Airong Zhang */
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/*======================================================================
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=================== TESTPLAN SEGMENT ===================
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>KEYS: < dup2()
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>WHAT: < Does dup return -1 on the 21st file?
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>HOW: < Create up to _NFILE files and check for -1 return on the
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< next attempt
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< Should check NOFILE as well as _NFILE. 19-Jun-84 Dale.
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>BUGS: <
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======================================================================*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "test.h"
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char *TCID = "dup205";
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int TST_TOTAL = 1;
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int *fildes;
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int min;
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int local_flag;
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#define PASSED 1
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#define FAILED 0
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static void setup(void);
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static void cleanup(void);
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int main(int ac, char *av[])
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{
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int ifile;
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char pfilname[40];
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int serrno;
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int lc;
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ifile = -1;
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tst_parse_opts(ac, av, NULL, NULL);
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local_flag = PASSED;
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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sprintf(pfilname, "./dup205.%d\n", getpid());
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unlink(pfilname);
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serrno = 0;
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if ((fildes[0] = creat(pfilname, 0666)) == -1)
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tst_brkm(TBROK | TERRNO, cleanup, "creat failed");
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else {
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fildes[fildes[0]] = fildes[0];
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for (ifile = fildes[0] + 1; ifile < min + 10; ifile++) {
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if ((fildes[ifile] = dup2(fildes[ifile - 1],
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ifile)) == -1) {
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serrno = errno;
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break;
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} else {
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if (fildes[ifile] != ifile) {
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tst_brkm(TFAIL, cleanup,
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"got wrong descriptor "
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"number back (%d != %d)",
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fildes[ifile], ifile);
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}
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}
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} /* end for */
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if (ifile < min) {
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tst_resm(TFAIL, "Not enough files duped");
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local_flag = FAILED;
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} else if (ifile > min) {
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tst_resm(TFAIL, "Too many files duped");
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local_flag = FAILED;
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}
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if (serrno != EBADF && serrno != EMFILE &&
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serrno != EINVAL) {
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tst_resm(TFAIL, "bad errno on dup2 failure");
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local_flag = FAILED;
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}
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}
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unlink(pfilname);
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for (ifile = fildes[0]; ifile < min + 10; ifile++)
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close(fildes[ifile]);
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if (local_flag == PASSED) {
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tst_resm(TPASS, "Test passed.");
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} else {
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tst_resm(TFAIL, "Test failed.");
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}
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}
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cleanup();
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tst_exit();
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}
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static void setup(void)
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{
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tst_tmpdir();
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min = getdtablesize(); /* get number of files allowed open */
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fildes = malloc((min + 10) * sizeof(int));
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if (fildes == NULL)
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tst_brkm(TBROK | TERRNO, cleanup, "malloc error");
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}
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static void cleanup(void)
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{
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if (fildes != NULL)
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free(fildes);
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tst_rmdir();
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}
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