misc.c

openPBS的开放源代码

/*
*         OpenPBS (Portable Batch System) v2.3 Software License
* 
* Copyright (c) 1999-2000 Veridian Information Solutions, Inc.
* All rights reserved.
* 
* ---------------------------------------------------------------------------
* For a license to use or redistribute the OpenPBS software under conditions
* other than those described below, or to purchase support for this software,
* please contact Veridian Systems, PBS Products Department ("Licensor") at:
* 
*    www.OpenPBS.org  [phone]                  [e-mail]
*                        877 902-4PBS (US toll-free)
* ---------------------------------------------------------------------------
* 
* This license covers use of the OpenPBS v2.3 software (the "Software") at
* your site or location, and, for certain users, redistribution of the
* Software to other sites and locations.  Use and redistribution of
* OpenPBS v2.3 in source and binary forms, with or without modification,
* are permitted provided that all of the following conditions are met.
* After December 31, 2001, only conditions 3-6 must be met:
* 
* 1. Commercial and/or non-commercial use of the Software is permitted
*    provided a current software registration is on file at www.OpenPBS.org.
*    If use of this software contributes to a publication, product, or
*    service, proper attribution must be given; see www.OpenPBS.org/credit.html
* 
* 2. Redistribution in any form is only permitted for non-commercial,
*    non-profit purposes.  There can be no charge for the Software or any
*    software incorporating the Software.  Further, there can be no
*    expectation of revenue generated as a consequence of redistributing
*    the Software.
* 
* 3. Any Redistribution of source code must retain the above copyright notice
*    and the acknowledgment contained in paragraph 6, this list of conditions
*    and the disclaimer contained in paragraph 7.
* 
* 4. Any Redistribution in binary form must reproduce the above copyright
*    notice and the acknowledgment contained in paragraph 6, this list of
*    conditions and the disclaimer contained in paragraph 7 in the
*    documentation and/or other materials provided with the distribution.
* 
* 5. Redistributions in any form must be accompanied by information on how to
*    obtain complete source code for the OpenPBS software and any
*    modifications and/or additions to the OpenPBS software.  The source code
*    must either be included in the distribution or be available for no more
*    than the cost of distribution plus a nominal fee, and all modifications
*    and additions to the Software must be freely redistributable by any party
*    (including Licensor) without restriction.
* 
* 6. All advertising materials mentioning features or use of the Software must
*    display the following acknowledgment:
* 
*     "This product includes software developed by NASA Ames Research Center,
*     Lawrence Livermore National Laboratory, and Veridian Information 
*     Solutions, Inc.
*     Visit www.OpenPBS.org for OpenPBS software support,
*     products, and information."
* 
* 7. DISCLAIMER OF WARRANTY
* 
* THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT
* ARE EXPRESSLY DISCLAIMED.
* 
* IN NO EVENT SHALL VERIDIAN CORPORATION, ITS AFFILIATED COMPANIES, OR THE
* U.S. GOVERNMENT OR ANY OF ITS AGENCIES BE LIABLE FOR ANY DIRECT OR INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* 
* This license will be governed by the laws of the Commonwealth of Virginia,
* without reference to its choice of law rules.
*/
/* $Id: misc.c,v 1.1.10.4 2000/08/09 00:19:17 hender Exp $ */

#include <sys/types.h>
#include <sys/time.h>
#include <sys/times.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include "pbs_ifl.h"
#include "log.h"

/* Scheduler header files */
#include "toolkit.h"

/*
 * POSIX/ANSI does not provide a portable method for finding the system time 
 * of day at sub-second resolution.  gettimeofday() is not POSIX 1003.1 
 * compliant, so it cannot be used if _POSIX_SOURCE is defined.
 *
 * POSIX 1003.1 provides the times() library call, which returns the number
 * of ticks since some fixed time.  From this number of ticks, an elapsed 
 * time can be calculated to sub-second granularity.  Note that the system
 * must be asked how many ticks there are per second.
 */

#ifndef HAVE_GETTIMEOFDAY
#if (!defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)) || \
	(defined(sgi) && (defined(_BSD_COMPAT) || defined(_BSD_TIME)))
#define HAVE_GETTIMEOFDAY
#endif /* ! _POSIX_SOURCE */
#endif /* ! HAVE_GETTIMEOFDAY */

void
schd_timestamp(char *msg)
{
#ifdef DEBUG
    char *id = "schd_timestamp";
    static char  timestr[32];
    time_t sec;
    struct tms tms;
    static clock_t oticks = 0;
    clock_t ticks;
    clock_t dsec, dmsec;
    static int tickspersec = 0;

#ifdef HAVE_GETTIMEOFDAY
    struct timeval now;

    if (gettimeofday(&now, NULL)) {
	DBPRT(("%s: gettimeofday() failed.\n", id));
	return;
    }

    sec = now.tv_sec;

#else /* HAVE_GETTIMEOFDAY */

    if (time(&sec) == (time_t)(-1)) {
	DBPRT(("%s: gettimeofday() failed.\n", id));
	return;
    }

#endif /* else HAVE_GETTIMEOFDAY */

    strcpy(timestr, ctime(&sec));
    timestr[19] = '\0';

#ifdef HAVE_GETTIMEOFDAY
    DBPRT(("%s: %-10s %s.%03ld ", id, (msg ? msg : "TIMESTAMP"), 
	&timestr[11], now.tv_usec / 1000));
#else /* HAVE_GETTIMEOFDAY */
    DBPRT(("%s: %-10s %s ", id, (msg ? msg : "TIMESTAMP"), &timestr[11]));
#endif /* else HAVE_GETTIMEOFDAY */

    /* If not already known, find the number of ticks per second. */
    if (tickspersec == 0) {
	tickspersec = (int)sysconf(_SC_CLK_TCK);
	if (tickspersec < 0) {
	    DBPRT(("%s: sysconf(_SC_CLK_TCK) failed.\n", id));
	    return;
	}
    }

    ticks = times(&tms);
    if (ticks == (clock_t)(-1)) {
	DBPRT(("%s: times() failed.\n", id));
	return;
    }

    if (oticks) {
	dsec  = (ticks - oticks) / tickspersec;
	dmsec = (((ticks - oticks) % tickspersec) * 1000) / tickspersec;

	DBPRT(("elapsed %d.%03d\n", dsec, dmsec));
    }

    oticks = ticks;
#endif /* DEBUG */

    return;
}

/*
 * Free a set of QueueList structures that reference (through qptr->queue)
 * an existing set of Queue structs.  The Queues themselves are not affected.
 */
int
schd_free_qlist(QueueList *qlist)
{
    QueueList *qptr, *next;
    int   num = 0;

    for (qptr = qlist; qptr != NULL; qptr = next) {
	next = qptr->next;
	free(qptr);
	num++;
    }

    return (num);
}

/*
 * This function differs from the schd_free_qlist() function in that it
 * actually frees the Queue's themselves, while schd_free_qlist() simply
 * destroys the list structures that point to the Queue's.
 */

int 
schd_destroy_qlist(QueueList *list)
{
    int num_items = 0;
    QueueList *qptr, *qnext;
    
    for (qptr = list; qptr != NULL; qptr = qnext) {
	qnext = qptr->next;

	if (qptr->queue->qname)
	    free(qptr->queue->qname);	/* Free strdup()'d storage. */

	if (qptr->queue->useracl)
	    schd_free_useracl(qptr->queue->useracl);

	if (qptr->queue->exechost)
	    free(qptr->queue->exechost);

	free (qptr->queue);		/* Free the queue struct. */
	free (qptr);			/* And the list that pointed to it. */

	num_items++;			/* Count it. */
    }

    return (num_items);
}

/*
 * strdup(3) is not required for POSIX compliance, so we must provide a 
 * "lookalike".
 */
char *
schd_strdup(char *string)
{
    size_t  length;
    char   *copy;

    /*
     * Allocate new space for a copy of the string contents, and a 
     * trailing '\0'.
     */
    length = strlen(string) + 1;   

    copy = malloc(length);
    if (copy == NULL)
	return (NULL);

    memcpy(copy, string, length);
    return(copy);
}

/*
 * Convert characters of a string to lowercase.  Return a pointer to
 * the original string.
 */
char *
schd_lowercase(char *string)
{
    char   *p;

    for (p = string; *p != '\0'; p++)
	if (isupper(*p))
	    *p = tolower(*p);

    return (string);
}

/*
 * Return a pointer to a copy of the host part of the fqdn presented.  I.e.
 * if fqdn is "foo.bar.com", copy the host part and return a pointer to it,
 * with the contents "foo".  If it is already short, return a copy anyway.
 */
char *
schd_shorthost(char *fqdn)
{
    char   *shorthost, *dotp;
    size_t  length;

    /* Check for bogus fqdn. */
    if (*fqdn == '.')
	return (NULL);

    if (dotp = strchr(fqdn, '.'))
	length = (size_t)(dotp - fqdn);
    else
	length = strlen(fqdn);

    if (shorthost = (char *)malloc(length + 1)) {
	memcpy(shorthost, fqdn, length);
	shorthost[length] = '\0';
    }

    return (shorthost);
}