[moira.git] / server / qsetup.pc

/*
 *	$Source$
 *	$Author$
 *	$Header$
 *
 *	Copyright (C) 1987 by the Massachusetts Institute of Technology
 *	For copying and distribution information, please see the file
 *	<mit-copyright.h>.
 *
 */

#ifndef lint
static char *rcsid_qsupport_dc = "$Header$";
#endif lint

#include <mit-copyright.h>
#include "mr_server.h"
#include "query.h"
#include <ctype.h>
#include <arpa/inet.h>
EXEC SQL INCLUDE sqlca;
#include "qrtn.h"

extern char *whoami, *strsave();
extern int dbms_errno, mr_errcode;

EXEC SQL BEGIN DECLARE SECTION;
extern char stmt_buf[];
EXEC SQL END DECLARE SECTION;

EXEC SQL WHENEVER SQLERROR DO dbmserr();


int prefetch_value(struct query *q, char **argv, client *cl);
int check_nfs(int mach_idx, char *name, char *access);

/* Setup Routines */

/* Setup routine for add_user
 *
 * Inputs: argv[0] - login
 *         argv[1] - uid
 *
 * Description:
 *
 * - if argv[1] == UNIQUE_UID then set argv[1] = next(uid)
 * - if argv[0] == UNIQUE_LOGIN then set argv[0] = "#<uid>"
 */

int setup_ausr(q, argv, cl)
     struct query *q;
     char *argv[];
     client *cl;
{
    int row, err;
    EXEC SQL BEGIN DECLARE SECTION;
    int nuid;
    EXEC SQL END DECLARE SECTION;

    if (!strcmp(q->shortname, "uusr") || !strcmp(q->shortname, "uuac"))
      row = 2;
    else
      row = 1;
    if (!strcmp(argv[row], UNIQUE_UID) || atoi(argv[row]) == -1) {
	if ((err=set_next_object_id("unix_uid", USERS_TABLE, 1)))
	  return(err);
	EXEC SQL SELECT value INTO :nuid FROM numvalues WHERE name = 'unix_uid';
	if (sqlca.sqlerrd[2] != 1)
	  return(MR_INTERNAL);
	sprintf(argv[row], "%d", nuid);
    }

    if (!strcmp(argv[0], UNIQUE_LOGIN) || atoi(argv[row]) == -1) {
	sprintf(argv[0], "#%s", argv[row]);
    }

    if((mr_errcode=prefetch_value(q,argv,cl))!=MR_SUCCESS)
      return(mr_errcode);

    return(MR_SUCCESS);
}


/* setup_dusr - verify that the user is no longer being referenced
 * and may safely be deleted.
 */

int setup_dusr(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int flag, id, cnt;
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];

    /* For now, only allow users to be deleted if their status is 0 */
    EXEC SQL SELECT status INTO :flag FROM users
      WHERE users_id = :id;
    if (flag != 0 && flag != 4)
      return(MR_IN_USE);

    EXEC SQL DELETE FROM quota WHERE entity_id = :id AND type='USER';
    EXEC SQL DELETE FROM krbmap WHERE users_id = :id;
    EXEC SQL SELECT COUNT(member_id) INTO :cnt FROM imembers
      WHERE member_id = :id AND member_type = 'USER';
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(label) INTO :cnt FROM filesys 
	WHERE owner = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(name) INTO :cnt FROM list
      WHERE acl_id = :id AND acl_type = 'USER';
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(name) INTO :cnt FROM servers
      WHERE acl_id = :id AND acl_type = 'USER';
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(acl_id) INTO :cnt FROM hostaccess
      WHERE acl_id = :id AND acl_type = 'USER';
    if (cnt > 0)
	return(MR_IN_USE);
    if (dbms_errno)
	return(mr_errcode);
    return(MR_SUCCESS);
}


/* setup_spop: verify that there is already a valid POP machine_id in the
 * pop_id field.  Also take care of keeping track of the post office usage.
 */
int setup_spop(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id, mid;
    char type[9];
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];
    EXEC SQL SELECT potype, pop_id INTO :type, :mid FROM users
      WHERE users_id = :id;
    if(sqlca.sqlerrd[2] = 0)
      return(MR_MACHINE);
    EXEC SQL SELECT mach_id INTO :mid FROM machine
      WHERE mach_id = :mid;
    if (sqlca.sqlerrd[2] = 0)
      return(MR_MACHINE);
    if (strcmp(strtrim(type), "POP"))
      set_pop_usage(mid, 1);
    return(MR_SUCCESS);
}


/* setup_dpob:  Take care of keeping track of the post office usage.
 */
int setup_dpob(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id, user;
    char type[9];
    EXEC SQL END DECLARE SECTION;

    user = *(int *)argv[0];
    EXEC SQL SELECT potype, pop_id INTO :type, :id FROM users
      WHERE users_id = :user;
    if (dbms_errno) return(mr_errcode);

    if (!strcmp(strtrim(type), "POP"))
      set_pop_usage(id, -1);
    return(MR_SUCCESS);
}


/* setup_dmac - verify that the machine is no longer being referenced
 * and may safely be deleted.
 */

int setup_dmac(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int flag, id, cnt;
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];

    EXEC SQL SELECT status INTO :flag FROM machine
      WHERE mach_id = :id;
    if (flag != 3)
      return(MR_IN_USE);
    EXEC SQL SELECT COUNT(login) INTO :cnt FROM users
      WHERE potype='POP' AND pop_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM serverhosts
      WHERE mach_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM nfsphys
      WHERE mach_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM hostaccess
      WHERE mach_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM printcap
      WHERE mach_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(quotaserver) INTO :cnt FROM printcap
      WHERE quotaserver = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM palladium
      WHERE mach_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM hostalias
      WHERE mach_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);

    EXEC SQL DELETE FROM mcmap WHERE mach_id = :id;
    if (dbms_errno) return(mr_errcode);
    return(MR_SUCCESS);
}


/* setup_dsnt - verify that the subnet is no longer being referenced
 * and may safely be deleted.
 */

int setup_dsnt(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id, cnt = 0;
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM machine
      WHERE snet_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    return(MR_SUCCESS);
}


/* setup_dclu - verify that the cluster is no longer being referenced
 * and may safely be deleted.
 */

int setup_dclu(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id, cnt;
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];
    EXEC SQL SELECT COUNT(mach_id) INTO :cnt FROM mcmap
      WHERE clu_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    EXEC SQL SELECT COUNT(clu_id) INTO :cnt FROM svc
      WHERE clu_id = :id;
    if (cnt > 0)
	return(MR_IN_USE);
    if (dbms_errno)
	return(mr_errcode);
    return(MR_SUCCESS);
}


/* setup_alis - if argv[5] is non-zero and argv[6] is UNIQUE_ID, then allocate
 * a new gid and put it in argv[6].  Otherwise if argv[6] is UNIQUE_ID but
 * argv[5] is not, then remember that UNIQUE_ID is being stored by putting
 * a -1 there.  Remember that this is also used for ulis, with the indexes
 * at 6 & 7.  Also check that the list name does not contain uppercase
 * characters, control characters, @, or :.
 */

static int badlistchars[] = {
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* ^@ - ^O */
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* ^P - ^_ */
    1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* SPACE - / */
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, /* 0 - ? */
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* @ - O */
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, /* P - _ */
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* ` - o */
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, /* p - ^? */
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
};

int setup_alis(q, argv, cl)
     struct query *q;
     char *argv[];
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int ngid;
    EXEC SQL END DECLARE SECTION;
    unsigned char *p;
    int idx, err;

    if (!strcmp(q->shortname, "alis"))
      idx = 0;
    else if (!strcmp(q->shortname, "ulis"))
      idx = 1;

    for (p = (unsigned char *) argv[idx]; *p; p++)
      if (badlistchars[*p])
        return(MR_BAD_CHAR);
 
    if (!strcmp(argv[6 + idx], UNIQUE_GID) || atoi(argv[6 + idx]) == -1) {
	if (atoi(argv[5 + idx])) {
	    if ((err=set_next_object_id("gid", LIST_TABLE, 1)))
	      return(err);
	    EXEC SQL SELECT value INTO :ngid FROM numvalues
	      WHERE name = 'gid';
	    if (dbms_errno) return(mr_errcode);
	    sprintf(argv[6 + idx], "%d", ngid);
	} else {
	    strcpy(argv[6 + idx], "-1");
	}
    }

    if((mr_errcode=prefetch_value(q,argv,cl))!=MR_SUCCESS)
      return(mr_errcode);

    return(MR_SUCCESS);
}


/* setup_dlis - verify that the list is no longer being referenced
 * and may safely be deleted.
 */

int setup_dlis(q, argv)
     struct query *q;
     char *argv[];
{
    int id;
    EXEC SQL BEGIN DECLARE SECTION;
    int cnt;
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];

    EXEC SQL SELECT COUNT(member_id) INTO :cnt FROM imembers
      WHERE member_id = :id AND member_type='LIST';
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT COUNT(member_id) INTO :cnt FROM imembers
      WHERE member_id = :id AND member_type='LIST';
    if(cnt>0) return MR_IN_USE;
    
    EXEC SQL SELECT COUNT(member_id) INTO :cnt FROM imembers
      WHERE list_id = :id;
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT COUNT(label) INTO :cnt FROM filesys WHERE owners = :id;
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT COUNT(tag) INTO :cnt FROM capacls WHERE list_id = :id;
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT COUNT(name) INTO :cnt FROM list
      WHERE acl_id = :id AND acl_type='LIST' AND list_id != :id;
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT COUNT(name) INTO :cnt FROM servers
      WHERE acl_id = :id AND acl_type='LIST';
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT COUNT(entity_id) INTO :cnt FROM quota
      WHERE entity_id = :id AND type='GROUP';
    if(cnt>0) return MR_IN_USE;
 
    EXEC SQL SELECT COUNT(acl_id) INTO :cnt FROM hostaccess
      WHERE acl_id = :id AND acl_type='LIST';
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT COUNT(class) INTO :cnt FROM zephyr z
      WHERE z.xmt_type = 'LIST' AND z.xmt_id = :id
      OR z.sub_type = 'LIST' AND z.sub_id = :id
      OR z.iws_type = 'LIST' AND z.iws_id = :id
      OR z.iui_type = 'LIST' AND z.iui_id = :id;
    if(cnt>0) return MR_IN_USE;

    return(MR_SUCCESS);
}


/* setup_dsin - verify that the service is no longer being referenced
 * and may safely be deleted.
 */

int setup_dsin(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;     
    int ec, cnt;
    char *svrname;
    EXEC SQL END DECLARE SECTION;

    svrname=argv[0];
    EXEC SQL SELECT COUNT(service) INTO :cnt FROM serverhosts
      WHERE service = UPPER(:svrname);
    if(cnt>0) return MR_IN_USE;

    EXEC SQL SELECT inprogress INTO :ec FROM servers 
      WHERE name=UPPER(:svrname);
    if(dbms_errno) 
	return(mr_errcode);
    if(ec) 
	return(MR_IN_USE); 

    return(MR_SUCCESS);
}


/* setup_dshi - verify that the service-host is no longer being referenced
 * and may safely be deleted.
 */

int setup_dshi(q, argv)
     struct query *q;
     char **argv;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id, ec;
    char *svrname;
    EXEC SQL END DECLARE SECTION;

    svrname=argv[0];
    id = *(int *)argv[1];

    EXEC SQL SELECT inprogress INTO :ec FROM serverhosts 
      WHERE service=UPPER(:svrname) AND mach_id = :id;
    if(dbms_errno) 
	return(mr_errcode);
    if(ec) 
	return(MR_IN_USE); 


    return(MR_SUCCESS);
}


/**
 ** setup_add_filesys - verify existance of referenced file systems
 **
 ** Inputs:     Add
 **   argv[1] - type
 **   argv[2] - mach_id
 **   argv[3] - name
 **   argv[5] - rwaccess
 **
 ** Description:
 **   - for type = RVD:
 **	   * allow anything
 **   - for type = NFS:
 **        * extract directory prefix from name
 **        * verify mach_id/dir in nfsphys
 **        * verify rwaccess in {r, w, R, W}
 **
 **  Side effect: sets variable _var_phys_id to the ID of the physical
 **	filesystem (nfsphys_id for NFS, 0 for RVD)
 **
 ** Errors:
 **   MR_NFS - specified directory not exported
 **   MR_FILESYS_ACCESS - invalid filesys access
 **
 **/

EXEC SQL BEGIN DECLARE SECTION;
int _var_phys_id;
EXEC SQL END DECLARE SECTION;

int setup_afil(q, argv, cl)
     struct query *q;
     char *argv[];
     client *cl;
{
    char *type, *name;
    int mach_id;
    EXEC SQL BEGIN DECLARE SECTION;
    int ok;
    char ftype[32], *rwaccess;
    EXEC SQL END DECLARE SECTION;

    type = argv[1];
    mach_id = *(int *)argv[2];
    name = argv[3];
    rwaccess = argv[5];
    _var_phys_id = 0;

    sprintf(ftype, "fs_access_%s", type);
    EXEC SQL SELECT COUNT(trans) INTO :ok FROM alias
	WHERE name = :ftype AND type = 'TYPE' and trans = :rwaccess;
    if (dbms_errno) return(mr_errcode);
    if (ok == 0) return(MR_FILESYS_ACCESS);

    if((mr_errcode=prefetch_value(q,argv,cl))!=MR_SUCCESS)
      return(mr_errcode);

    if (!strcmp(type, "NFS"))
	return (check_nfs(mach_id, name, rwaccess));

    return(MR_SUCCESS);
}


/* Verify the arguments, depending on the FStype.  Also, if this is an
 * NFS filesystem, then update any quotas for that filesystem to reflect
 * the new phys_id.
 */

int setup_ufil(q, argv, cl)
     struct query *q;
     char *argv[];
     client *cl;
{
    int mach_id, status;
    char *type, *name;
    EXEC SQL BEGIN DECLARE SECTION;
    int fid, total, who, ok;
    char *entity, ftype[32], *access;
    short int total_null;
    EXEC SQL END DECLARE SECTION;

    _var_phys_id = 0;
    type = argv[2];
    mach_id = *(int *)argv[3];
    name = argv[4];
    access = argv[6];
    fid = *(int *)argv[0];
    who = cl->client_id;
    entity = cl->entity;

    sprintf(ftype, "fs_access_%s", type);
    EXEC SQL SELECT COUNT(trans) INTO :ok FROM alias
      WHERE name = :ftype AND type='TYPE' AND trans = :access;
    if (dbms_errno) return(mr_errcode);
    if (ok == 0) return(MR_FILESYS_ACCESS);

    EXEC SQL SELECT type INTO :ftype FROM filesys
      WHERE filsys_id = :fid;
    if (dbms_errno) return(mr_errcode);

    if (!strcmp(type, "NFS")) {
	status = check_nfs(mach_id, name, access);
	EXEC SQL UPDATE quota SET phys_id = :_var_phys_id
	  WHERE filsys_id = :fid;
	if (dbms_errno) return(mr_errcode);
	return(status);
    } else if (!strcmp(type, "AFS") && strcmp(strtrim(ftype), "AFS")) {
	total = 0;
	EXEC SQL DELETE FROM quota
	  WHERE type = 'ANY' AND filsys_id = :fid;
	EXEC SQL SELECT SUM (quota) INTO :total:total_null FROM quota
	  WHERE filsys_id = :fid AND phys_id != 0;
	if (dbms_errno) return(mr_errcode);
	if (!total_null && (total != 0)) {
/*
 *             append quota (quota = total, filsys_id = fid,
 *			     phys_id = 0, entity_id = 0, type = "ANY",
 *			     modtime = "now", modby = who, modwith = entity)
 */
	    EXEC SQL INSERT INTO quota (quota, filsys_id, phys_id, entity_id,
					type, modtime, modby, modwith)
	      VALUES (:total, :fid, 0, 0,
		      'ANY', SYSDATE, :who, :entity) ;
	    if (dbms_errno) return(mr_errcode);
	}
    } else {
	EXEC SQL UPDATE quota SET phys_id = 0 WHERE filsys_id = :fid;
	if (dbms_errno) return(mr_errcode);
    }
    return(MR_SUCCESS);
}


/* Find the NFS physical partition that the named directory is on.
 * This is done by comparing the dir against the mount point of the
 * partition.  To make sure we get the correct match when there is
 * more than one, we sort the query in reverse order by dir name.
 */

int check_nfs(mach_id, name, access)
EXEC SQL BEGIN DECLARE SECTION;
    int mach_id;
EXEC SQL END DECLARE SECTION;
    char *name, *access;
{
    EXEC SQL BEGIN DECLARE SECTION;
    char dir[81];
    EXEC SQL END DECLARE SECTION;
    register int status;
    register char *cp1;
    register char *cp2;

    status = MR_NFS;
    EXEC SQL DECLARE csr101 CURSOR FOR
      SELECT nfsphys_id, dir FROM nfsphys
	WHERE mach_id = :mach_id
	ORDER BY 2 DESC;
    if (dbms_errno)
	return(mr_errcode);
    EXEC SQL OPEN csr101;
    if (dbms_errno)
	return(mr_errcode);
    while(1) {
	EXEC SQL FETCH csr101 INTO :_var_phys_id, :dir;
	if(sqlca.sqlcode != 0) break;
	cp1 = name;
	cp2 = strtrim(dir);
	while (*cp2) {
	    if (*cp1++ != *cp2) break;
	    cp2++;
	}
	if (*cp2 == 0) {
	    status = MR_SUCCESS;
	    break;
	}
    }
    EXEC SQL CLOSE csr101;
    if (dbms_errno)
	return(mr_errcode);
    return(status);
}


/* setup_dfil: free any quota records and fsgroup info associated with
 * a filesystem when it is deleted.  Also adjust the allocation numbers.
 */

int setup_dfil(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id, total, phys_id;
    short int none;
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];
    EXEC SQL SELECT SUM (quota) INTO :total:none FROM quota
      WHERE filsys_id = :id;

    if(none) total=0;

    /** What if there are multiple phys_id's per f/s? (bad data) **/
    EXEC SQL SELECT phys_id INTO :phys_id FROM filesys
      WHERE filsys_id = :id;
    EXEC SQL UPDATE nfsphys SET allocated = allocated - :total
      WHERE nfsphys_id = :phys_id;

    if(!none) {
	EXEC SQL DELETE FROM quota WHERE filsys_id = :id;
    }
    EXEC SQL DELETE FROM fsgroup WHERE filsys_id = :id;
    EXEC SQL DELETE FROM fsgroup WHERE group_id = :id;
    if (dbms_errno) return(mr_errcode);
    return(MR_SUCCESS);
}


/* setup_dnfp: check to see that the nfs physical partition does not have
 * any filesystems assigned to it before allowing it to be deleted.
 */

int setup_dnfp(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id, cnt;
    char *dir;
    EXEC SQL END DECLARE SECTION;

    id = *(int *)argv[0];
    dir = argv[1];
    EXEC SQL SELECT count(fs.rowid) INTO :cnt FROM filesys fs, nfsphys np
      WHERE fs.mach_id = :id AND fs.phys_id = np.nfsphys_id
	AND np.mach_id = :id AND np.dir = :dir;
    if (cnt > 0)
      return(MR_IN_USE);
    if (dbms_errno)
      return(mr_errcode);
    return(MR_SUCCESS);
}


/* setup_dqot: Remove allocation from nfsphys before deleting quota.
 *   argv[0] = filsys_id
 *   argv[1] = type if "update_quota" or "delete_quota"
 *   argv[2 or 1] = users_id or list_id
 */

int setup_dqot(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int quota, fs, id, physid;
    char *qtype;
    EXEC SQL END DECLARE SECTION;

    fs = *(int *)argv[0];
    if (!strcmp(q->name, "update_quota") || !strcmp(q->name, "delete_quota")) {
	qtype = argv[1];
	id = *(int *)argv[2];
    } else {
	qtype = "USER";
	id = *(int *)argv[1];
    }

    EXEC SQL SELECT quota INTO :quota FROM quota
      WHERE type = :qtype AND entity_id = :id AND filsys_id = :fs;
    EXEC SQL SELECT phys_id INTO :physid FROM filesys 
      WHERE filsys_id = :fs;
    EXEC SQL UPDATE nfsphys SET allocated = allocated - :quota
      WHERE nfsphys_id = :physid;

    if (dbms_errno) return(mr_errcode);
    return(MR_SUCCESS);
}


/* setup add_kerberos_user_mapping: add the string to the string
 * table if necessary.
 */

int setup_akum(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int id;
    char *name;
    EXEC SQL END DECLARE SECTION;

    name = argv[1];
    if (name_to_id(name, STRINGS_TABLE, &id) != MR_SUCCESS) {
	if (q->type != APPEND) return(MR_STRING);
	id=add_string(name);
	cache_entry(name, STRINGS_TABLE, id);
    }
    if (dbms_errno) return(mr_errcode);
    *(int *)argv[1] = id;
    return(MR_SUCCESS);
}


/* prefetch_value():
 * This routine fetches an appropriate value from the numvalues table.
 * It is a little hack to get around the fact that SQL doesn't let you
 * do something like INSERT INTO table (foo) VALUES (other_table.bar).
 *
 * It is called from the query table as (*v->pre_rtn)(q,Argv,cl) or
 * from within a setup_...() routine with the appropriate arguments.
 *
 * Correct functioning of this routine may depend on the assumption
 * that this query is an APPEND.
 */

int prefetch_value(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    char *name = q->validate->object_id;
    int value;
    EXEC SQL END DECLARE SECTION;
    int status, limit, argc;

    /* set next object id, limiting it if necessary */
    if(!strcmp(name, "unix_uid") || !strcmp(name, "gid"))
      limit = 1; /* So far as I know, this isn't needed.  Just CMA. */
    else
      limit = 0;
    if((status = set_next_object_id(name, q->rtable, limit)) != MR_SUCCESS)
      return(status);

    /* fetch object id */
    EXEC SQL SELECT value INTO :value FROM numvalues WHERE name=:name;
    if(dbms_errno) return(mr_errcode);
    if(sqlca.sqlerrd[2] != 1) return(MR_INTERNAL);

    argc = q->argc + q->vcnt;   /* end of Argv for APPENDs */
    sprintf(argv[argc],"%d",value);  /** Could save this step by changing tlist from %s to %d **/

    return(MR_SUCCESS);
}

/* prefetch_filesys():
 * Fetches the phys_id from filesys based on the filsys_id in argv[0].
 * Appends the filsys_id and the phys_id to the argv so they can be
 * referenced in an INSERT into a table other than filesys.  Also
 * see comments at prefetch_value().
 *
 * Assumes the existence of a row where filsys_id = argv[0], since a
 * filesys label has already been resolved to a filsys_id.
 */
int prefetch_filesys(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    int fid,phid;
    EXEC SQL END DECLARE SECTION;
    int argc;

    fid = *(int *)argv[0];
    EXEC SQL SELECT phys_id INTO :phid FROM filesys WHERE filsys_id = :fid;
    if(dbms_errno) return(mr_errcode);

    argc=q->argc+q->vcnt;
    sprintf(argv[argc++],"%d",phid);
    sprintf(argv[argc],"%d",fid);

    return(MR_SUCCESS);
}


/* setup_ahst():
 */

int setup_ahst(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    char *name;
    int value, id, saddr, mask, high, low, cnt;
    EXEC SQL END DECLARE SECTION;
    int row;
    struct in_addr addr;
    extern int host_access_level, privileged;

    if (!strcmp(q->shortname, "uhst"))
      row = 1;
    else
      row = 0;

    /* sanity check name: must start with a letter, contain only
     * letters, numerals, and hyphen, and not end with a hyphen.
     */
    if (row == 0 || strcmp(argv[1], cl->args->mr_argv[1])) {
	char *p = argv[row];

	if (!isalpha(*p)) return(MR_BAD_CHAR);
	for (; *p; p++) {
	    if ((!isalnum(*p) && *p != '-' && *p != '.') ||
		(*p == '-' && p[1] == '.'))
	      return(MR_BAD_CHAR);
	}
	if (*(p-1) == '-') return(MR_BAD_CHAR);
    }

    /* sanity check host vendor: must start with a letter, contain only
     * letters, numerals, and hyphen, and end with an alphanumeric.
     */
    if (*argv[row+1] && (row == 0 || strcmp(argv[2], cl->args->mr_argv[2]))) {
	char *p = argv[row+1];

	if (!isalpha(*p)) return(MR_BAD_CHAR);
	for (; *p; p++) {
	    if ((!isalnum(*p) && *p != '-' && *p != '.') ||
		(*p == '-' && p[1] == '.'))
	      return(MR_BAD_CHAR);
	}
	if (!isalnum(*(p-1))) return(MR_BAD_CHAR);
    }

    /* sanity check host type: must start with a letter, contain only
     * letters, numerals, and hyphen, and end with an alphanumeric.
     */
    if (*argv[row+2] && (row == 0 || strcmp(argv[3], cl->args->mr_argv[3]))) {
	char *p = argv[row+2];

	if (!isalnum(*p)) return(MR_BAD_CHAR);
	for (; *p; p++) {
	    if ((!isalnum(*p) && *p != '-' && *p != '.') ||
		(*p == '-' && p[1] == '.'))
	      return(MR_BAD_CHAR);
	}
	if (!isalnum(*(p-1))) return(MR_BAD_CHAR);
    }

    /* sanity check host vendor: must start with a letter, contain only
     * letters, numerals, and hyphen, and end with an hyphen alphanumeric.
     */
    if (*argv[row+3] && (row == 0 || strcmp(argv[4], cl->args->mr_argv[4]))) {
	char *p = argv[row+3];

	if (!isalpha(*p)) return(MR_BAD_CHAR);
	for (; *p; p++) {
	    if ((!isalnum(*p) && *p != '-' && *p != '.') ||
		(*p == '-' && p[1] == '.'))
	      return(MR_BAD_CHAR);
	}
	if (!isalnum(*(p-1))) return(MR_BAD_CHAR);
    }

    /* check for duplicate name */
    name = argv[row];
    EXEC SQL SELECT count(mach_id) INTO :cnt FROM hostalias
      WHERE name = :name;
    if (dbms_errno) return(mr_errcode);
    if (cnt != 0) return(MR_EXISTS);

    /* check address */
    if (!strcmp(argv[9+row], "unassigned"))
      value = -1;
    else if (!strcmp(argv[9+row], "unique")) {
	if (*(int *)argv[8+row] == 0)
	  value = -1;
	else
	  value = -2;
    } else {
	value = ntohl(inet_addr(argv[9+row]));
	if (value == -1) return(MR_ADDRESS);
    }
    if (value == 0) return(MR_ADDRESS);
    if (value != -1) {
        /*
         * an address or unique was specified.
         */
	id = *(int *)argv[8+row];
	EXEC SQL SELECT saddr, mask, high, low INTO :saddr, :mask, :high, :low
	  FROM subnet WHERE snet_id = :id;
	if (dbms_errno) return(mr_errcode);
	if (value != -2) {
            /*
             * someone specified an IP address for the host record
             */
	    if ((value & mask) != saddr) return(MR_ADDRESS);
            /* 
             * run the address argument through inet_addr(). This
             * has the effect that any out of bounds host addrs will
             * be converted to a valid host addr. We do this now
             * so that the uniqueness check works. We should also
             * link in an inet_addr() that returns an error for
             * this case. 
             */
	    addr.s_addr=inet_addr(argv[9+row]);
	    name = inet_ntoa(addr);
	    EXEC SQL SELECT count(mach_id) INTO :cnt FROM machine
	      WHERE address = :name;
	    if (dbms_errno) return(mr_errcode);
	    if (cnt > 0) {
                /*
                 * make IP address is unique. If this a modify request
                 * (row == 1), then we expect one record to exist.
                 */
		if (row == 0 || row == 1 && cnt > 1) return(MR_ADDRESS);
		if (row == 1 && cnt == 1) {
		    EXEC SQL SELECT mach_id INTO :id FROM machine
		      WHERE address = :name;
		    if (id != *(int *)argv[0]) return(MR_ADDRESS);
		}
	    }
	} else {
            /*
             * a "unique" address was specified. Walk through the
             * range specified in the network record, return
             * error if no room left.
             */
	    for (id = low; id <= high; id++) {
		if (((id & 0xff) == 0) ||
		    ((id & 0xff) == 255))
		  continue;
		addr.s_addr = htonl(id);
		name = (char *)inet_ntoa(addr);
		EXEC SQL SELECT count(mach_id) INTO :cnt FROM machine
		  WHERE address = :name;
		if (dbms_errno) return(mr_errcode);
		if (cnt == 0) break;
	    }
	    if (cnt != 0)
	      return(MR_ADDRESS);
	    else
	      value = htonl(id);
	}
        /*
         * we have an address in value. Convert it to a string and store it.
         */
	addr.s_addr = htonl(value);
	strcpy(argv[9+row], inet_ntoa(addr));
    } else {
	strcpy(argv[9+row], "unassigned");
    }

    /* status checking */
    value = atoi(argv[7+row]);
    if (row == 0 && !(value == 1 || value == 0))
      return(MR_TYPE);
    if (row == 1) {
	id = *(int *)argv[0];
	EXEC SQL SELECT status INTO :cnt FROM machine WHERE mach_id = :id;
	if (dbms_errno) return(mr_errcode);
	if (value != cnt) {
  	    EXEC SQL UPDATE machine SET statuschange = SYSDATE
                 WHERE mach_id = :id;
	}
    }

    if (row == 0 && !privileged) {
	/* subnet owner is adding a host */
	/* Non-query owner must set use to zero */
	if (atoi(argv[6]) != 0) return(MR_PERM);
    } else if (row == 1 && !privileged) {
	EXEC SQL BEGIN DECLARE SECTION;
	int i8, i12, i13, i7, i9, i14;
	char s6[33], s10[33], s11[9];
	EXEC SQL END DECLARE SECTION;
	/* Non-query owner is restricted in changes that can be made */
	id = *(int *)argv[0];
	EXEC SQL SELECT contact, status, address, owner_type, owner_id,
	  acomment, use, snet_id, ocomment INTO :s6, :i8, :s10, :s11,
	  :i12, :i13, :i7, :i9, :i14 FROM machine WHERE mach_id = :id;
	if (dbms_errno) return(mr_errcode);
	/* subnet owner cannot change use, comment, or network */
	if ((i7 != atoi(argv[7])) || (i14 != *(int *)argv[14]) ||
            (i9 != *(int *)argv[9]))
	  return(MR_PERM);
	/* host owner cannot change contact, status, address, owner_type,
	 * owner_id, acomment, or subnet */
	if (host_access_level == 2 &&
	    (strcmp(argv[6], strtrim(s6)) || (i8 != atoi(argv[8])) ||
	     strcmp(argv[10], strtrim(s10)) ||strcmp(argv[11], strtrim(s11)) ||
	     (i12 != *(int *)argv[12]) || (i13 != *(int *)argv[13]) ||
	     (i9 != *(int *)argv[9])))
	  return(MR_PERM);
    }

    /*
     * If this is an update_host query, we're done.
     */
    if (row == 1)
	return(MR_SUCCESS);

    /*
     * For an add_host query, allocate and fill in a new machine id,
     * and then insert the creator id.
     */
    if ((mr_errcode = prefetch_value(q,argv,cl)) != MR_SUCCESS)
      return(mr_errcode);

    sprintf(argv[q->argc + q->vcnt + 1], "%d",cl->client_id);
    return(MR_SUCCESS);
}


/* setup_ahal():
 */

int setup_ahal(q, argv, cl)
     struct query *q;
     char **argv;
     client *cl;
{
    EXEC SQL BEGIN DECLARE SECTION;
    char *name;
    int cnt;
    EXEC SQL END DECLARE SECTION;
    char *p;

    p = name = argv[0];
    if (!isalpha(*p)) return(MR_BAD_CHAR);
    for (; *p; p++) {
	if ((!isalnum(*p) && *p != '-' && *p != '.') ||
	    (*p == '-' && p[1] == '.'))
	  return(MR_BAD_CHAR);
    }
    if (*(p-1) == '-') return(MR_BAD_CHAR);

    EXEC SQL SELECT count(mach_id) INTO :cnt FROM machine WHERE
      name = :name;
    if (dbms_errno) return(mr_errcode);
    if (cnt > 0) return(MR_EXISTS);

    return(MR_SUCCESS);
}