mom_start.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.
*/
#include <pbs_config.h>   /* the master config generated by configure */

#include <sys/types.h>
#include <sys/session.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>
#include "libpbs.h"
#include "list_link.h"
#include "log.h"
#include "server_limits.h"
#include "attribute.h"
#include "resource.h"
#include "job.h"
#include "mom_mach.h"
#include "mom_func.h"

static char ident[] = "@(#) $RCSfile: mom_start.c,v $ $Revision: 2.3.4.1.2.4 $";

/* Global Variables */

extern int	 exiting_tasks;
extern char	 mom_host[];
extern list_head svr_alljobs;
extern int	 termin_child;
extern time_t    time_now;

#if	SRFS
char	*fast_dir;
char	*big_dir;
char	*tmp_dir;
#endif

/*
 * tmpdirname - build a temporary directory name
 */

char *tmpdirname(root, sequence)
char	*root;
char	*sequence;
{
	static char tmpdir[MAXPATHLEN+1];

	if (root == NULL)
		return (NULL);

	sprintf(tmpdir, "%s/pbs.%s", root, sequence);
	return (tmpdir);
}

#define	DIR_RETRY	10

/*
**	Try to make a directory.  If it works, return 0.  If
**	the name exists, return 1.  If it fails for any other reason,
**	return -1.
*/
int
makedir(name, uid, gid)
    char	*name;
    uid_t	uid;
    gid_t	gid;
{
	static	char	id[] = "makedir";
	int	i;

	for(i=0; i<DIR_RETRY; i++) {
		if (mkdir(name, 0777) == -1) {
			if (errno == EEXIST) {
				sleep(1);
				continue;
			}
			sprintf(log_buffer, "mkdir: %s", name);
			log_err(errno, id, log_buffer);
			return -1;
		}
        	if (chown (name, uid, gid) == -1) {
			sprintf(log_buffer, "chown: %s", name);
			log_err(errno, id, log_buffer);
			return -1;
		}
		return 0;
	}

	sprintf(log_buffer, "mkdir retrys exhausted: %s", name);
	log_err(errno, id, log_buffer);
	return 1;
}

/*
 * mktmpdir - make temporary directory(s)
 *	Temporary directory(s) are created and the name are
 *	placed in environment variables. If a directory can not be made an
 *	error code is returned.
 */

int
mktmpdir(pjob, vtab)
    job		*pjob;
    struct	var_table	*vtab;    /* pointer to variable table */
{
	uid_t	uid;
	gid_t	gid;
	char	*seq;
	char	*tmpdir;
	char	*pdir;
	int	ret;
	task	*ptask;
	int	tasks;
#if	SRFS
	extern char *var_value A_((char *));
#endif

	uid = pjob->ji_qs.ji_un.ji_momt.ji_exuid;
	gid = pjob->ji_qs.ji_un.ji_momt.ji_exgid;
	seq = pjob->ji_qs.ji_jobid;

	for (ptask = (task *)GET_NEXT(pjob->ji_tasks), tasks=0;
		ptask != NULL;
		ptask = (task *)GET_NEXT(ptask->ti_jobtask), tasks++);

#if	SRFS
	tmpdir = tmpdirname(var_value("TMPDIR"), seq);
#else
	tmpdir = tmpdirname(TMP_DIR, seq);
#endif	/* SRFS */
	if (tasks == 1) {
		if ((ret = makedir(tmpdir, uid, gid)) != 0)
			return ret;
	}
	bld_env_variables(vtab, "TMPDIR", tmpdir);
#if	SRFS
	tmp_dir = strdup(tmpdir);

	if ((pdir = var_value("BIGDIR")) != NULL) {
		tmpdir = tmpdirname(pdir, seq);
		if (tasks == 1) {
			if ((ret = makedir(tmpdir, uid, gid)) != 0)
				return ret;
		}
		bld_env_variables(vtab, "BIGDIR", tmpdir);
		big_dir = strdup(tmpdir);
	}

	if ((pdir = var_value("FASTDIR")) != NULL) {
		tmpdir = tmpdirname(var_value("FASTDIR"), seq);
		if (tasks == 1) {
			if ((ret = makedir(tmpdir, uid, gid)) != 0)
				return ret;
		}
		bld_env_variables(vtab, "FASTDIR", tmpdir);
		fast_dir = strdup(tmpdir);
	}
#endif	/* SRFS */

	return 0;
}

void
rmonedir(tmpdir)
    char	*tmpdir;
{
	static	char	*id = "rmonedir";
        struct	stat	sb;
	int	pid;
	char	*rm = "/bin/rm";
	char	*rf = "-rf";

	/* Hello, is any body there? */
        if (stat(tmpdir, &sb) == -1) {
                if ( errno != ENOENT ) {
			sprintf(log_buffer, "Unable to stat %s", tmpdir);
			log_err(errno, id, log_buffer);
                }
                return;
        }

	/* fork and exec the cleamtmp process */
	pid = fork();
	if ( pid < 0 ) {
		log_err(errno, id, "Unable to fork");
                return;
        }

	if ( pid > 0 ) return;

	execl(rm, "pbs_cleandir", rf, tmpdir, 0);
	log_err(errno, id, "This is really bad");
	exit(1);
}

/*
 * rmtmpdir - remove the temporary directory
 *	This may take awhile so the task is forked and execed to another
 *	process.
 */

void
rmtmpdir(sequence)
    char *	sequence;
#if	SRFS
{
	static	char	*id = "rmtmpdir";
	char	*tmpdir;
	int	pid, pstat;
	extern char *var_value A_((char *));

	pid = fork();
	if ( pid < 0 ) {
		log_err(errno, id, "Unable to fork");
                return;
        }

	if ( pid > 0 )	/* parent */
		return;

	/* child */
	tmpdir = tmpdirname(var_value("TMPDIR"), sequence);
	rmonedir(tmpdir);
	wait(&pstat);

	tmpdir = tmpdirname(var_value("FASTDIR"), sequence);
	rmonedir(tmpdir);
	wait(&pstat);

	tmpdir = tmpdirname(var_value("BIGDIR"), sequence);
	rmonedir(tmpdir);
	wait(&pstat);

	exit(0);
}
#else
{
	static	char	*id = "rmtmpdir";
	char	*tmpdir;

	/* Get tmpdir name */
	tmpdir = tmpdirname(TMP_DIR, sequence);
	rmonedir(tmpdir);
}
#endif	/* SRFS */

/*
 * set_job - set up a new job session
 * 	Set session id and whatever else is required on this machine
 *	to create a new job.
 */
int set_job(pjob, sjr)
    job	*pjob;