120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
/*
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* Copyright (c) International Business Machines Corp., 2005
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* Copyright (c) Wipro Technologies Ltd, 2005. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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/**********************************************************
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*
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* TEST IDENTIFIER : getdtablesize01
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*
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* EXECUTED BY : root / superuser
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*
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* TEST TITLE : Basic tests for getdtablesize01(2)
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*
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* TEST CASE TOTAL : 1
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*
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* AUTHOR : Prashant P Yendigeri
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* <prashant.yendigeri@wipro.com>
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* Robbie Williamson
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* <robbiew@us.ibm.com>
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*
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* DESCRIPTION
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* This is a Phase I test for the getdtablesize01(2) system call.
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* It is intended to provide a limited exposure of the system call.
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*
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**********************************************************/
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#include <stdio.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <unistd.h>
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#include "test.h"
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void setup();
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void cleanup();
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char *TCID = "getdtablesize01";
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int TST_TOTAL = 1;
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int main(void)
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{
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int table_size, fd = 0, count = 0;
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int max_val_opfiles;
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struct rlimit rlp;
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setup();
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table_size = getdtablesize();
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getrlimit(RLIMIT_NOFILE, &rlp);
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max_val_opfiles = (rlim_t) rlp.rlim_cur;
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tst_resm(TINFO,
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"Maximum number of files a process can have opened is %d",
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table_size);
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tst_resm(TINFO,
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"Checking with the value returned by getrlimit...RLIMIT_NOFILE");
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if (table_size == max_val_opfiles)
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tst_resm(TPASS, "got correct dtablesize, value is %d",
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max_val_opfiles);
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else {
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tst_resm(TFAIL, "got incorrect table size, value is %d",
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max_val_opfiles);
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cleanup();
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}
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tst_resm(TINFO,
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"Checking Max num of files that can be opened by a process.Should be: RLIMIT_NOFILE - 1");
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for (;;) {
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fd = open("/etc/hosts", O_RDONLY);
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if (fd == -1)
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break;
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count = fd;
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#ifdef DEBUG
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printf("Opened file num %d\n", fd);
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#endif
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}
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//Now the max files opened should be RLIMIT_NOFILE - 1 , why ? read getdtablesize man page
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if (count > 0)
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close(count);
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if (count == (max_val_opfiles - 1))
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tst_resm(TPASS, "%d = %d", count, (max_val_opfiles - 1));
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else if (fd < 0 && errno == ENFILE)
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tst_brkm(TCONF, cleanup, "Reached maximum number of open files for the system");
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else
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tst_resm(TFAIL, "%d != %d", count, (max_val_opfiles - 1));
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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(NOFORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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}
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void cleanup(void)
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{
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}
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