testcases/kernel/syscalls/read/read01.c

/*
 * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */
/* $Id: read01.c,v 1.6 2009/02/26 12:16:34 subrata_modak Exp $ */
/**********************************************************
 *
 *    OS Test - Silicon Graphics, Inc.
 *
 *    TEST IDENTIFIER	: read01
 *
 *    EXECUTED BY	: anyone
 *
 *    TEST TITLE	: Basic test for read(2)
 *
 *    PARENT DOCUMENT	: usctpl01
 *
 *    TEST CASE TOTAL	: 1
 *
 *    WALL CLOCK TIME	: 1
 *
 *    CPU TYPES		: ALL
 *
 *    AUTHOR		: William Roske
 *
 *    CO-PILOT		: Dave Fenner
 *
 *    DATE STARTED	: 03/30/92
 *
 *    INITIAL RELEASE	: UNICOS 7.0
 *
 *    TEST CASES
 *
 * 	1.) read(2) returns...(See Description)
 *
 *    INPUT SPECIFICATIONS
 * 	The standard options for system call tests are accepted.
 *	(See the parse_opts(3) man page).
 *
 *    OUTPUT SPECIFICATIONS
 * 
 *    DURATION
 * 	Terminates - with frequency and infinite modes.
 *
 *    SIGNALS
 * 	Uses SIGUSR1 to pause before test if option set.
 * 	(See the parse_opts(3) man page).
 *
 *    RESOURCES
 * 	None
 *
 *    ENVIRONMENTAL NEEDS
 *      No run-time environmental needs.
 *
 *    SPECIAL PROCEDURAL REQUIREMENTS
 * 	None
 *
 *    INTERCASE DEPENDENCIES
 * 	None
 *
 *    DETAILED DESCRIPTION
 *	This is a Phase I test for the read(2) system call.  It is intended
 *	to provide a limited exposure of the system call, for now.  It
 *	should/will be extended when full functional tests are written for
 *	read(2).
 *
 * 	Setup:
 * 	  Setup signal handling.
 *	  Pause for SIGUSR1 if option specified.
 *
 * 	Test:
 *	 Loop if the proper options are given.
 * 	  Execute system call
 *	  Check return code, if system call failed (return=-1)
 *		Log the errno and Issue a FAIL message.
 *	  Otherwise, Issue a PASS message.
 *
 * 	Cleanup:
 * 	  Print errno log and/or timing stats if options given
 *
 *
 *#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#**/

#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/param.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include "test.h"
#include "usctest.h"

/*
 * Set READ_BLOCK_SIZE to the block size of the system.
 */
#ifdef __linux__
#define READ_BLOCK_SIZE DEV_BSIZE
#else
#define READ_BLOCK_SIZE BSIZE
#endif

void setup();
void cleanup();



char *TCID="read01"; 		/* Test program identifier.    */
int TST_TOTAL=1;    		/* Total number of test cases. */
extern int Tst_count;		/* Test Case counter for tst_* routines */

int exp_enos[]={0, 0};
char fname[255];
int fd, i;
int offset=0;
char *s;

int
main(int ac, char **av)
{
    int lc;		/* loop counter */
    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);
   
    /***************************************************************
     * perform global setup for test
     ***************************************************************/
    setup();
   
    /* set the expected errnos... */
    TEST_EXP_ENOS(exp_enos);
   
    /***************************************************************
     * check looping state if -c option given
     ***************************************************************/
    for (lc=0; TEST_LOOPING(lc); lc++) {

	/* reset Tst_count in case we are looping. */
	Tst_count=0;

        if (write(fd, s, READ_BLOCK_SIZE) == -1) {
	    tst_brkm(TBROK, cleanup,
		     "write(%s, %s, %d) Failed, errno=%d : %s",
		     fname, s, READ_BLOCK_SIZE, errno, strerror(errno));
        }
        offset+=READ_BLOCK_SIZE;
        if (lseek(fd, (long)(offset-READ_BLOCK_SIZE), 0) == -1) {
	    tst_brkm(TBROK, cleanup,
		     "lseek(%s, %ld, 0) Failed, errno=%d : %s",
		     fname, (long)(offset-READ_BLOCK_SIZE), errno, strerror(errno));
        }
	/*
	 * Call read(2)
	 */
	TEST(read(fd, s, READ_BLOCK_SIZE));

	/* check return code */
	if ( TEST_RETURN == -1 ) {
	    TEST_ERROR_LOG(TEST_ERRNO);
	    tst_resm(TFAIL, "read(fd, s, READ_BLOCK_SIZE) Failed, errno=%d : %s",
		     TEST_ERRNO, strerror(TEST_ERRNO));
	} else {
	    /***************************************************************
	     * only perform functional verification if flag set (-f not given)
	     ***************************************************************/
	    if ( STD_FUNCTIONAL_TEST ) {
		/* No Verification test, yet... */
		tst_resm(TPASS, "read(pfds) returned %d", TEST_RETURN);
	    }
	}

    }	/* End for TEST_LOOPING */
   
    /***************************************************************
     * cleanup and exit
     ***************************************************************/
    cleanup();

    return 0;
}	/* End main */

/***************************************************************
 * setup() - performs all ONE TIME setup for this test.
 ***************************************************************/
void
setup()
{
    /* capture signals */
    tst_sig(NOFORK, DEF_HANDLER, cleanup);
   
    /* Pause if that option was specified */
    TEST_PAUSE;
   
    /* make a temp directory and cd to it */
    tst_tmpdir();
   
    if ((s = malloc(READ_BLOCK_SIZE)) == NULL) {
	tst_brkm(TBROK, cleanup,
		 "malloc(%d) Failed, errno=%d : %s",
		 READ_BLOCK_SIZE, errno, strerror(errno));
    }
    (void) memset(s, '*', READ_BLOCK_SIZE);
    for (i=0; i < READ_BLOCK_SIZE; i++) {
        if ( s[i] != '*' ) {
	    tst_brkm(TBROK, cleanup,
		     "File Data pattern not setup correctly : expected * at s[%d] : found %c",
		     i, s[i]);
        }
    }
    sprintf(fname,"./tfile_%d",getpid());
    if ((fd=open(fname,O_RDWR|O_CREAT,0700)) == -1) {
	tst_brkm(TBROK, cleanup,
		 "open(%s, O_RDWR|O_CREAT,0700) Failed, errno=%d : %s",
		 fname, errno, strerror(errno));
    }
   
}	/* End setup() */


/***************************************************************
 * 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;
   
    if (close(fd) == -1 ) {
	tst_resm(TWARN, "close(%s) Failed, errno=%d : %s",
		 fname, errno, strerror(errno));
    }
   
    /* Remove tmp dir and all files in it */
    tst_rmdir();
   
    /* exit with return code appropriate for results */
    tst_exit();
   
}	/* End cleanup() */