#if (!defined(lint) && !defined(SABER))
  static char rcsid_module_c[] = "$Header: /afs/sipb.mit.edu/project/sipb-athena/repository/src/moira/clients/moira/attach.c,v 1.39 1996/10/17 21:32:41 danw Exp $";
#endif

/*	This is the file attach.c for the MOIRA Client, which allows a nieve
 *      user to quickly and easily maintain most parts of the MOIRA database.
 *	It Contains: Functions for maintaining data used by Hesiod 
 *                   to map courses/projects/users to their file systems, 
 *                   and maintain filesys info. 
 *	
 *	Created: 	5/4/88
 *	By:		Chris D. Peterson
 *
 *      $Source: /afs/sipb.mit.edu/project/sipb-athena/repository/src/moira/clients/moira/attach.c,v $
 *      $Author: danw $
 *      $Header: /afs/sipb.mit.edu/project/sipb-athena/repository/src/moira/clients/moira/attach.c,v 1.39 1996/10/17 21:32:41 danw Exp $
 *	
 *  	Copyright 1988 by the Massachusetts Institute of Technology.
 *
 *	For further information on copyright and distribution 
 *	see the file mit-copyright.h
 */

#include <stdio.h>
#include <string.h>
#include <moira.h>
#include <moira_site.h>
#include <menu.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>

#include "mit-copyright.h"
#include "defs.h"
#include "f_defs.h"
#include "globals.h"

#define FS_ALIAS_TYPE "FILESYS"

#define LABEL        0
#define MACHINE      1
#define GROUP        2
#define ALIAS        3

#define NO_MACHINE	 ("\\[NONE\\]")	/* C will remove one of the /'s here,
					 * and the other quotes the [ for
					 * ingres' regexp facility. */
#define NO_MACHINE_BAD	 ("[NONE]")

#define DEFAULT_TYPE     ("AFS")
#define DEFAULT_MACHINE  DEFAULT_NONE
#define DEFAULT_PACK     DEFAULT_NONE
#define DEFAULT_ACCESS   ("w")
#define DEFAULT_COMMENTS DEFAULT_COMMENT
#define DEFAULT_OWNER    (user)
#define DEFAULT_OWNERS   (user)
#define DEFAULT_CREATE   DEFAULT_YES
#define DEFAULT_L_TYPE   ("PROJECT")
#define DEFAULT_CELL	 ("athena.mit.edu")

/*	Function Name: SetDefaults
 *	Description: sets the default values for filesystem additions.
 *	Arguments: info - an array of char pointers to recieve defaults. 
 *	Returns: char ** (this array, now filled).
 */

static char ** 
SetDefaults(info, name)
char ** info;
char * name;
{
    char buf[BUFSIZ];

    info[FS_NAME] =     Strsave(name);
    info[FS_TYPE] =     Strsave(DEFAULT_TYPE);
    info[FS_MACHINE] =  Strsave(DEFAULT_MACHINE);
    info[FS_PACK] =     Strsave(DEFAULT_PACK);
    sprintf(buf, "/mit/%s", name);
    info[FS_M_POINT] =  Strsave(buf);
    info[FS_ACCESS] =   Strsave(DEFAULT_ACCESS);
    info[FS_COMMENTS] = Strsave(DEFAULT_COMMENTS);
    info[FS_OWNER] =    Strsave(DEFAULT_OWNER);
    info[FS_OWNERS] =   Strsave(DEFAULT_OWNERS);
    info[FS_CREATE] =   Strsave(DEFAULT_CREATE);
    info[FS_L_TYPE] =   Strsave(DEFAULT_L_TYPE);
    info[FS_MODTIME] = info[FS_MODBY] = info[FS_MODWITH] = info[FS_END] = NULL;
    return(info);
}

/*	Function Name: GetFSInfo
 *	Description: Stores the info in a queue.
 *	Arguments: type - type of information to get.
 *                 name - name of the item to get information on.
 *	Returns: a pointer to the first element in the queue.
 */

static struct qelem *
GetFSInfo(type, name)
int type;
char *name;
{
    int stat;
    struct qelem * elem = NULL;
    char * args[5];

    switch (type) {
    case LABEL:
	if ( (stat = do_mr_query("get_filesys_by_label", 1, &name,
				  StoreInfo, (char *)&elem)) != 0) {
	    com_err(program_name, stat, " in GetFSInfo");
	    return(NULL);
	}
	break;
    case MACHINE:
	if ( (stat = do_mr_query("get_filesys_by_machine", 1, &name,
				  StoreInfo, (char *)&elem)) != 0) {
	    com_err(program_name, stat, " in GetFSInfo");
	    return(NULL);
	}
	break;
    case GROUP:
	if ( (stat = do_mr_query("get_filesys_by_group", 1, &name,
				  StoreInfo, (char *)&elem)) != 0) {
	    com_err(program_name, stat, " in GetFSInfo");
	    return(NULL);
	}
	break;
    case ALIAS:
	args[ALIAS_NAME] = name;
	args[ALIAS_TYPE] = FS_ALIAS_TYPE;
	args[ALIAS_TRANS] = "*";
	if ( (stat = do_mr_query("get_alias", 3, args, StoreInfo, 
				  (char *) &elem)) != 0) {
	    com_err(program_name, stat, " in get_alias.");
	    return(NULL);
	}
    }

    return(QueueTop(elem));
}

/*	Function Name: PrintFSAlias
 *	Description: Prints a filesystem alias
 *	Arguments: info - an array contains the strings of info.
 *	Returns: the name of the filesys - used be QueryLoop().
 */

static char *
PrintFSAlias(info)
char ** info;
{
    char buf[BUFSIZ];

    sprintf(buf,"Alias: %-25s Filesystem: %s",info[ALIAS_NAME], 
	    info[ALIAS_TRANS]);
    Put_message(buf);
    return(info[ALIAS_NAME]);
}

static int fsgCount = 1;

static char *
PrintFSGMembers(info)
char ** info;
{
    char print_buf[BUFSIZ];

    sprintf(print_buf, "  %d. Filesystem: %-32s (sort key: %s)", fsgCount++, info[0], info[1]);
    Put_message(print_buf);
    return(info[0]);
}


/*	Function Name: PrintFSInfo
 *	Description: Prints the filesystem information.
 *	Arguments: info - a pointer to the filesystem information.
 *	Returns: none.
 */

static char *
PrintFSInfo(info)
char ** info;
{
    char print_buf[BUFSIZ];

    FORMFEED;

    if (!strcmp(info[FS_TYPE], "FSGROUP") || !strcmp(info[FS_TYPE], "MUL")) {
	int stat;
	struct qelem *elem = NULL;

	if (!strcmp(info[FS_TYPE], "MUL"))
	  sprintf(print_buf,"%20s Multiple Filesystem: %s", " ", info[FS_NAME]);
	else
	  sprintf(print_buf,"%20s Filesystem Group: %s", " ", info[FS_NAME]);
	Put_message(print_buf);

	sprintf(print_buf,"Comments: %s",info[FS_COMMENTS]);
	Put_message(print_buf);
	sprintf(print_buf, MOD_FORMAT, info[FS_MODBY], info[FS_MODTIME], 
		info[FS_MODWITH]);
	Put_message(print_buf);
	Put_message("Containing the filesystems (in order):");
	if ((stat = do_mr_query("get_fsgroup_members", 1, &info[FS_NAME],
				 StoreInfo, (char *)&elem)) != 0) {
	    if (stat == MR_NO_MATCH)
	      Put_message("    [no members]");
	    else
	      com_err(program_name, stat, " in PrintFSInfo");
	} else {
	    fsgCount = 1;
	    Loop(QueueTop(elem), (void *) PrintFSGMembers);
	    FreeQueue(elem);
	}
    } else {
	sprintf(print_buf,"%20s Filesystem: %s", " ", info[FS_NAME]);
	Put_message(print_buf);
	sprintf(print_buf,"Type: %-40s Machine: %-15s",
		info[FS_TYPE], info[FS_MACHINE]);
	Put_message(print_buf);
	sprintf(print_buf,"Default Access: %-2s Packname: %-17s Mountpoint %s ",
		info[FS_ACCESS], info[FS_PACK], info[FS_M_POINT]);
	Put_message(print_buf);
	sprintf(print_buf,"Comments: %s",info[FS_COMMENTS]);
	Put_message(print_buf);
	sprintf(print_buf, "User Ownership: %-30s Group Ownership: %s",
		info[FS_OWNER], info[FS_OWNERS]);
	Put_message(print_buf);
	sprintf(print_buf, "Update Fileserver: %-27s Locker Type: %s",
		atoi(info[FS_CREATE]) ? "ON" : "OFF", 
		info[FS_L_TYPE]);
	Put_message(print_buf);
	sprintf(print_buf, MOD_FORMAT, info[FS_MODBY], info[FS_MODTIME], 
		info[FS_MODWITH]);
	Put_message(print_buf);
    }
    return(info[FS_NAME]);
}


char *canonicalize_cell(c)
char *c;
{
    struct stat stbuf;
    char path[512];
    int count;

    sprintf(path, "/afs/%s", c);
    if (lstat(path, &stbuf) || !stbuf.st_mode&S_IFLNK)
      return(c);
    count = readlink(path, path, sizeof(path));
    if (count < 1) return(c);
    path[count] = 0;
    free(c);
    return(strsave(path));
}


int GetAliasValue(argc, argv, retval)
int argc;
char **argv;
char **retval;
{
    *retval = strsave(argv[2]);
    return(MR_CONT);
}

/*	Function Name: AskFSInfo.
 *	Description: This function askes the user for information about a 
 *                   machine and saves it into a structure.
 *	Arguments: info - a pointer the the structure to put the
 *                             info into.
 *                 name - add a newname field? (T/F)
 *	Returns: none.
 */

static char **
AskFSInfo(info, name)
char ** info;
Bool name;
{
    char temp_buf[BUFSIZ], *newname, access_type[32];
    int fsgroup = 0, newdefaults = 0;

    Put_message("");
    sprintf(temp_buf, "Changing Attributes of filesystem %s.", 
	    info[FS_NAME]);
    Put_message(temp_buf);
    Put_message("");

    if (name) {
	newname = Strsave(info[FS_NAME]);
	if (GetValueFromUser("The new name for this filesystem",
			     &newname) == SUB_ERROR)
	  return(NULL);
    }

    strcpy(temp_buf, info[FS_TYPE]);
    if (GetTypeFromUser("Filesystem's Type", "filesys", &info[FS_TYPE]) ==
	SUB_ERROR)
      return(NULL);
    if (!strcasecmp(info[FS_TYPE], "FSGROUP") ||
	!strcasecmp(info[FS_TYPE], "MUL"))
      fsgroup++;
    if (strcasecmp(info[FS_TYPE], temp_buf))
      newdefaults++;
    if (fsgroup) {
	free(info[FS_MACHINE]);
	info[FS_MACHINE] = Strsave(NO_MACHINE);
    } else {
	if (!strcmp(info[FS_MACHINE], NO_MACHINE_BAD)) {
	    free(info[FS_MACHINE]);
	    info[FS_MACHINE] = Strsave(NO_MACHINE);
	}
	if (!strcasecmp(info[FS_TYPE], "AFS")) {
	    if (!name || newdefaults) {
		free(info[FS_MACHINE]);
		info[FS_MACHINE] = strsave(DEFAULT_CELL);
	    }
	    if (GetValueFromUser("Filesystem's Cell", &info[FS_MACHINE]) ==
		SUB_ERROR)
	      return(NULL);
	    info[FS_MACHINE] = canonicalize_cell(info[FS_MACHINE]);
	} else {
	    if (GetValueFromUser("Filesystem's Machine", &info[FS_MACHINE]) ==
		SUB_ERROR)
	      return(NULL);
	    info[FS_MACHINE] = canonicalize_hostname(info[FS_MACHINE]);
	}
    }
    if (!fsgroup) {
	if (!strcasecmp(info[FS_TYPE], "AFS")) {
	    char *path, *args[3], *p;
	    int status, depth, i;
	    if (GetTypeFromUser("Filesystem's lockertype", "lockertype",
				&info[FS_L_TYPE]) == SUB_ERROR)
	      return(NULL);
	    if (!name || newdefaults) {
		free(info[FS_PACK]);
		lowercase(info[FS_MACHINE]);
		sprintf(temp_buf, "%s:%s", info[FS_MACHINE], info[FS_L_TYPE]);
		args[0] = temp_buf;
		args[1] = "AFSPATH";
		args[2] = "*";
		path = "???";
		status = do_mr_query("get_alias", 3, args,
				     GetAliasValue, &path);
		if (status == MR_SUCCESS) {
		    p = strchr(path, ':');
		    if (p) {
			*p = 0;
			depth = atoi(++p);
		    } else
		      depth = 0;
		    sprintf(temp_buf, "/afs/%s/%s", info[FS_MACHINE], path);
		    if (depth >= 0) {
			for (p=info[FS_NAME]; *p&&(p-info[FS_NAME])<depth; p++) {
			    if (islower(*p)) {
				strcat(temp_buf, "/x");	
				temp_buf[strlen(temp_buf)-1] = *p;
			    } else {
				sprintf(temp_buf, "/afs/%s/%s/other", info[FS_MACHINE], path);
				break;
			    }
			}
		    } else if (depth = -1) {
			if (isdigit(info[FS_NAME][0])) {
			    strcat(temp_buf, "/");
			    depth = strlen(temp_buf);
			    for (p = info[FS_NAME]; *p && isdigit(*p); p++) {
				temp_buf[depth++] = *p;
				temp_buf[depth] = 0;
			    }
			} else
			  strcat(temp_buf, "/other");
		    } else {
			/* no default */
		    }
		    strcat(temp_buf, "/");
		    strcat(temp_buf, info[FS_NAME]);
		    free(path);
		} else {
		    sprintf(temp_buf, "/afs/%s/%s/%s", info[FS_MACHINE],
			    lowercase(info[FS_L_TYPE]), info[FS_NAME]);
		}
		info[FS_PACK] = strsave(temp_buf);
	    }
	}
	if (GetValueFromUser("Filesystem's Pack Name", &info[FS_PACK]) ==
	    SUB_ERROR)
	  return(NULL);
	if (GetValueFromUser("Filesystem's Mount Point", &info[FS_M_POINT]) ==
	    SUB_ERROR)
	  return(NULL);
	sprintf(access_type, "fs_access_%s", info[FS_TYPE]);
	if (GetTypeFromUser("Filesystem's Default Access", access_type,
			    &info[FS_ACCESS]) == SUB_ERROR)
	  return(NULL);
    }
    if (GetValueFromUser("Comments about this Filesystem", &info[FS_COMMENTS])
	== SUB_ERROR)
      return(NULL);
    if (GetValueFromUser("Filesystem's owner (user)", &info[FS_OWNER]) ==
	SUB_ERROR)
      return(NULL);
    if (GetValueFromUser("Filesystem's owners (group)", &info[FS_OWNERS]) ==
	SUB_ERROR)
      return(NULL);
    if (!fsgroup)
      if (GetYesNoValueFromUser("Propagate changes to fileserver",
				&info[FS_CREATE]) == SUB_ERROR)
	return(NULL);
    if (strcasecmp(info[FS_TYPE], "AFS")) {
	if (GetTypeFromUser("Filesystem's lockertype", "lockertype",
			    &info[FS_L_TYPE]) == SUB_ERROR)
	  return(NULL);
    }

    FreeAndClear(&info[FS_MODTIME], TRUE);
    FreeAndClear(&info[FS_MODBY], TRUE);
    FreeAndClear(&info[FS_MODWITH], TRUE);

    if (name)			/* slide the newname into the #2 slot. */
	SlipInNewName(info, newname);

    return(info);
}


/* --------------- Filesystem Menu ------------- */

/*	Function Name: GetFS
 *	Description: Get Filesystem information by name.
 *	Arguments: argc, argv - name of filsys in argv[1].
 *	Returns: DM_NORMAL.
 */

/* ARGSUSED */
int
GetFS(argc, argv)
int argc;
char **argv;
{
    struct qelem *top;

    top = GetFSInfo(LABEL, argv[1]); /* get info. */
    Loop(top, (void *) PrintFSInfo);
    FreeQueue(top);		/* clean the queue. */
    return (DM_NORMAL);
}

/*	Function Name: GetFSM
 *	Description: Get Filesystem information by machine.
 *	Arguments: argc, argv - name of server in argv[1].
 *	Returns: DM_NORMAL.
 */

/* ARGSUSED */
int
GetFSM(argc, argv)
int argc;
char **argv;
{
    struct qelem *top;

    argv[1] = canonicalize_hostname(strsave(argv[1]));
    top = GetFSInfo(MACHINE, argv[1]); /* get info. */
    Loop(top, (void *) PrintFSInfo);
    FreeQueue(top);		/* clean the queue. */
    return (DM_NORMAL);
}

/*	Function Name: RealDeleteFS
 *	Description: Does the real deletion work.
 *	Arguments: info - array of char *'s containing all useful info.
 *                 one_item - a Boolean that is true if only one item 
 *                              in queue that dumped us here.
 *	Returns: none.
 */

void
RealDeleteFS(info, one_item)
char ** info;
Bool one_item;
{
    int stat;
    char temp_buf[BUFSIZ];

/* 
 * Deletetions are  performed if the user hits 'y' on a list of multiple 
 * filesystem, or if the user confirms on a unique alias.
 */
    sprintf(temp_buf, "Are you sure that you want to delete filesystem %s",
	    info[FS_NAME]);
    if(!one_item || Confirm(temp_buf)) {
	if ( (stat = do_mr_query("delete_filesys", 1,
				  &info[FS_NAME], Scream, NULL)) != 0)
	    com_err(program_name, stat, " filesystem not deleted.");
	else
	    Put_message("Filesystem deleted.");
    }
    else 
	Put_message("Filesystem not deleted.");
}

/*	Function Name: DeleteFS
 *	Description: Delete a filesystem give its name.
 *	Arguments: argc, argv - argv[1] is the name of the filesystem.
 *	Returns: none.
 */

/* ARGSUSED */
 
int
DeleteFS(argc, argv)
int argc;
char **argv;
{
    struct qelem *elem = GetFSInfo(LABEL, argv[1]);
    QueryLoop(elem, PrintFSInfo, RealDeleteFS, "Delete the Filesystem");

    FreeQueue(elem);
    return (DM_NORMAL);
}

/*	Function Name: RealChangeFS
 *	Description: performs the actual change to the filesys.
 *	Arguments: info - the information 
 *                 junk - an unused boolean.
 *	Returns: none.
 */

/* ARGSUSED. */
static void
RealChangeFS(info, junk)
char ** info;
Bool junk;
{
    int stat;
    char ** args;
    extern Menu nfsphys_menu;

    args = AskFSInfo(info, TRUE);
    if (args == NULL) {
	Put_message("Aborted.");
	return;
    }
    stat = do_mr_query("update_filesys", CountArgs(args), args,
			NullFunc, NULL);
    switch (stat) {
    case MR_NFS:
	Put_message("That NFS filesystem is not exported.");
	if (YesNoQuestion("Fix this now (Y/N)", TRUE) == TRUE) {
	    Do_menu(&nfsphys_menu, 0, NULL);
	    if (YesNoQuestion("Retry filesystem update now (Y/N)", TRUE)
		== TRUE) {
		if (stat = do_mr_query("update_filesys", CountArgs(args), args,
					NullFunc, NULL))
		    com_err(program_name, stat, " filesystem not updated");
		else
		    Put_message("filesystem sucessfully updated.");
	    }
	}
	break;
    case MR_SUCCESS:
	break;
    default:
	com_err(program_name, stat, " in UpdateFS");
    }
}

/*	Function Name: ChangeFS
 *	Description: change the information in a filesys record.
 *	Arguments: arc, argv - value of filsys in argv[1].
 *	Returns: DM_NORMAL.
 */

/* ARGSUSED */
int
ChangeFS(argc, argv)
char **argv;
int argc;
{
    struct qelem *elem = GetFSInfo(LABEL, argv[1]);
    QueryLoop(elem, NullPrint, RealChangeFS, "Update the Filesystem");

    FreeQueue(elem);
    return (DM_NORMAL);
}

/*	Function Name: AddFS
 *	Description: change the information in a filesys record.
 *	Arguments: arc, argv - name of filsys in argv[1].
 *	Returns: DM_NORMAL.
 */

/* ARGSUSED */
int
AddFS(argc, argv)
char **argv;
int argc;
{
    char *info[MAX_ARGS_SIZE], **args, buf[BUFSIZ];
    int stat;
    extern Menu nfsphys_menu;

    if ( !ValidName(argv[1]) )
	return(DM_NORMAL);

    if ( (stat = do_mr_query("get_filesys_by_label", 1, argv + 1,
			      NullFunc, NULL)) == 0) {
	Put_message ("A Filesystem by that name already exists.");
	return(DM_NORMAL);
    } else if (stat != MR_NO_MATCH) {
	com_err(program_name, stat, " in AddFS");
	return(DM_NORMAL);
    } 

    if ((args = AskFSInfo(SetDefaults(info, argv[1]), FALSE )) == NULL) {
	Put_message("Aborted.");
	return(DM_NORMAL);
    }

    stat = do_mr_query("add_filesys", CountArgs(args), args, NullFunc, NULL);
    switch (stat) {
    case MR_NFS:
	Put_message("That NFS filesystem is not exported.");
	if (YesNoQuestion("Fix this now (Y/N)", TRUE) == TRUE) {
	    Do_menu(&nfsphys_menu, 0, NULL);
	    if (YesNoQuestion("Retry filesystem creation now (Y/N)", TRUE)
		== TRUE) {
		if (stat = do_mr_query("add_filesys", CountArgs(args), args,
					NullFunc, NULL))
		    com_err(program_name, stat, " in AddFS");
		else
		    Put_message("Created.");
	    }
	}
	break;
    case MR_SUCCESS:
	break;
    default:
	com_err(program_name, stat, " in AddFS");
    }

    if (stat == MR_SUCCESS && !strcasecmp(info[FS_L_TYPE], "HOMEDIR")) {
	static char *val[] = {"def_quota", NULL};
	static char *def_quota = NULL;
	char *argv[Q_QUOTA + 1];
	struct qelem *top = NULL;

	if (def_quota == NULL) {
	    stat = do_mr_query("get_value", CountArgs(val), val,
				StoreInfo, (char *) &top);
	    if (stat != MR_SUCCESS) {
		com_err(program_name, stat, " getting default quota");
	    } else {
		top = QueueTop(top);
		def_quota = Strsave(((char **)top->q_data)[0]);
		FreeQueue(top);
	    }
	}
	if (def_quota != NULL) {
	    sprintf(buf, "Give user %s a quota of %s on filesys %s (Y/N)",
		    info[FS_NAME], def_quota, info[FS_NAME]);
	    if (YesNoQuestion(buf, 1) == TRUE) {
		argv[Q_NAME] = argv[Q_FILESYS] = info[FS_NAME];
		if (!strcmp(info[FS_TYPE], "NFS"))
		  argv[Q_TYPE] = "USER";
		else
		  argv[Q_TYPE] = "ANY";
		argv[Q_QUOTA] = def_quota;
		if ((stat = do_mr_query("add_quota", Q_QUOTA+1, argv, Scream,
					 (char *) NULL)) != MR_SUCCESS) {
		    com_err(program_name, stat, " while adding quota");
		}
	    }
	}
    } else if (stat == MR_SUCCESS) {
	if (YesNoQuestion("Assign a quota on this filesystem (Y/N)", 1)
	    == TRUE) {
	    parsed_argc = 1;
	    parsed_argv[0] = info[FS_NAME];
	    AddQuota();
	}
    }

    FreeInfo(info);
    return (DM_NORMAL);
}

/*	Function Name: SortAfter
 *	Description: choose a sortkey to cause an item to be added after 
 *		the count element in the queue
 *	Arguments: queue of filesys names & sortkeys, queue count pointer
 *	Returns: sort key to use.
 */

/* ARGSUSED */
char *
SortAfter(elem, count)
struct qelem *elem;
int count;
{
    char *prev, *next, prevnext, *key, keybuf[9];

    /* first find the two keys we need to insert between */
    prev = "A";
    for (; count > 0; count--) {
	prev = ((char **)elem->q_data)[1];
	if (elem->q_forw)
	  elem = elem->q_forw;
	else
	  break;
    }
    if (count > 0)
      next = "Z";
    else
      next = ((char **)elem->q_data)[1];

    /* now copy the matching characters */
    for (key = keybuf; *prev && *prev == *next; next++) {
	*key++ = *prev++;
    }

    /* and set the last character */
    if (*prev == 0)
      *prev = prevnext = 'A';
    else
      prevnext = prev[1];
    if (prevnext == 0)
      prevnext = 'A';
    if (*next == 0)
      *next = 'Z';
    if (*next - *prev > 1) {
	*key++ = (*next + *prev)/2;
    } else {
	*key++ = *prev;
	*key++ = (prevnext + 'Z')/2;
    }
    *key = 0;
    return(Strsave(keybuf));
}

/*	Function Name: AddFSToGroup
 *	Description: add a filesystem to an FS group
 *	Arguments: arc, argv - name of group in argv[1], filesys in argv[2].
 *	Returns: DM_NORMAL.
 */

/* ARGSUSED */
int
AddFSToGroup(argc, argv)
char **argv;
int argc;
{
    int stat, count;
    struct qelem *elem = NULL;
    char buf[BUFSIZ], *args[5], *bufp;

    if ((stat = do_mr_query("get_fsgroup_members", 1, argv+1, StoreInfo,
			     (char *)&elem)) != 0) {
	if (stat != MR_NO_MATCH)
	  com_err(program_name, stat, " in AddFSToGroup");
    }
    if (elem == NULL) {
	args[0] = argv[1];
	args[1] = argv[2];
	args[2] = "M";
	stat = do_mr_query("add_filesys_to_fsgroup", 3, args, Scream, NULL);
	if (stat)
	  com_err(program_name, stat, " in AddFSToGroup");
	return(DM_NORMAL);
    }
    elem = QueueTop(elem);
    fsgCount = 1;
    Loop(elem, (void *) PrintFSGMembers);
    sprintf(buf, "%d", QueueCount(elem));
    bufp = Strsave(buf);
    if (GetValueFromUser("Enter number of filesystem it should follow (0 to make it first):", &bufp) == SUB_ERROR)
      return(DM_NORMAL);
    count = atoi(bufp);
    free(bufp);
    args[2] = SortAfter(elem, count);

    FreeQueue(QueueTop(elem));
    args[0] = argv[1];
    args[1] = argv[2];
    stat = do_mr_query("add_filesys_to_fsgroup", 3, args, Scream, NULL);
    if (stat == MR_EXISTS) {
	Put_message("That filesystem is already a member of the group.");
	Put_message("Use the order command if you want to change the sorting order.");
    } else if (stat)
      com_err(program_name, stat, " in AddFSToGroup");
    return(DM_NORMAL);
}


/*	Function Name: RemoveFSFromGroup
 *	Description: delete a filesystem from an FS group
 *	Arguments: arc, argv - name of group in argv[1].
 *	Returns: DM_NORMAL.
 */

/* ARGSUSED */
int
RemoveFSFromGroup(argc, argv)
char **argv;
int argc;
{
    int stat;
    char buf[BUFSIZ];

    sprintf(buf, "Delete filesystem %s from FS group %s", argv[2], argv[1]);
    if (!Confirm(buf))
      return(DM_NORMAL);
    if ((stat = do_mr_query("remove_filesys_from_fsgroup", 2, argv+1,
			     Scream, NULL)) != 0) {
	com_err(program_name, stat, ", not removed.");
    }
    return(DM_NORMAL);
}

/*	Function Name: ChangeFSGroupOrder
 *	Description: change the sortkey on a filesys in an FSgroup
 *	Arguments: arc, argv - name of group in argv[1].
 *	Returns: DM_NORMAL.
 */

/* ARGSUSED */
int
ChangeFSGroupOrder(argc, argv)
char **argv;
int argc;
{
    int stat, src, dst, i;
    struct qelem *elem = NULL, *top, *tmpelem;
    char buf[BUFSIZ], *bufp, *args[3];

    if ((stat = do_mr_query("get_fsgroup_members", 1, argv+1, StoreInfo,
			     (char *)&elem)) != 0) {
	if (stat == MR_NO_MATCH) {
	    sprintf(buf,
		    "Ether %s is not a filesystem group or it has no members",
		    argv[1]);
	    Put_message(buf);
	} else
	  com_err(program_name, stat, " in ChangeFSGroupOrder");
	return(DM_NORMAL);
    }
    top = QueueTop(elem);
    fsgCount = 1;
    Loop(top, (void *) PrintFSGMembers);
    while (1) {
	bufp = Strsave("1");
	if (GetValueFromUser("Enter number of the filesystem to move:",
			     &bufp) == SUB_ERROR)
	  return(DM_NORMAL);
	src = atoi(bufp);
	free(bufp);
	if (src < 0) {
	    Put_message("You must enter a positive number (or 0 to abort).");
	    continue;
	} else if (src == 0) {
	    Put_message("Aborted.");
	    return(DM_NORMAL);
	}
	for (elem = top, i = src; i-- > 1 && elem->q_forw; elem = elem->q_forw);
	if (i > 0) {
	    Put_message("You entered a number that is too high");
	    continue;
	}
	break;
    }
    while (1) {
	bufp = Strsave("0");
	if (GetValueFromUser("Enter number of filesystem it should follow (0 to make it first):", &bufp) == SUB_ERROR)
	  return(DM_NORMAL);
	dst = atoi(bufp);
	free(bufp);
	if (src == dst || src == dst + 1) {
	    Put_message("That has no effect on the sorting order!");
	    return(DM_NORMAL);
	}
	if (dst < 0) {
	    Put_message("You must enter a non-negative number.");
	    continue;
	}
	for (tmpelem = top, i = dst;
	     i-- > 1 && tmpelem->q_forw;
	     tmpelem = tmpelem->q_forw);
	if (i > 0) {
	    Put_message("You entered a number that is too high");
	    continue;
	}
	break;
    }
    args[2] = SortAfter(top, dst);
    args[0] = argv[1];
    args[1] = ((char **)elem->q_data)[0];
    if ((stat = do_mr_query("remove_filesys_from_fsgroup", 2, args,
			     Scream, NULL)) != 0) {
	com_err(program_name, stat, " in ChangeFSGroupOrder");
	return(DM_NORMAL);
    }
    if ((stat = do_mr_query("add_filesys_to_fsgroup", 3, args,
			     Scream, NULL)) != 0) {
	com_err(program_name, stat, " in ChangeFSGroupOrder");
    }
    return(DM_NORMAL);
}


/* -------------- Top Level Menu ---------------- */

/*	Function Name: GetFSAlias
 *	Description: Gets the value for a Filesystem Alias.
 *	Arguments: argc, argv - name of alias in argv[1].
 *	Returns: DM_NORMAL.
 *      NOTES: There should only be one filesystem per alias, thus
 *             this will work correctly.
 */

/* ARGSUSED */
int
GetFSAlias(argc, argv)
int argc;
char **argv;
{
    struct qelem *top;

    top = GetFSInfo(ALIAS, argv[1]);
    Put_message(" ");		/* blank line. */
    Loop(top, (void *) PrintFSAlias);
    FreeQueue(top);
    return(DM_NORMAL);
}

/*	Function Name: CreateFSAlias
 *	Description: Create an alias name for a filesystem
 *	Arguments: argc, argv - name of alias in argv[1].
 *	Returns: DM_NORMAL.
 *      NOTES:  This requires (name, type, transl)  I get {name, translation}
 *              from the user.  I provide type, which is well-known. 
 */

/* ARGSUSED */
int
CreateFSAlias(argc, argv)
int argc;
char **argv;
{
    register int stat;
    struct qelem *elem, *top;
    char *args[MAX_ARGS_SIZE], buf[BUFSIZ], **info;

    elem = NULL;

    if (!ValidName(argv[1]))
	return(DM_NORMAL);

    args[ALIAS_NAME] = Strsave(argv[1]);
    args[ALIAS_TYPE] = Strsave(FS_ALIAS_TYPE);
    args[ALIAS_TRANS] = Strsave("*");

/*
 * Check to see if this alias already exists in the database, if so then
 * print out values, free memory used and then exit.
 */

    if ( (stat = do_mr_query("get_alias", 3, args, StoreInfo, 
			      (char *)&elem)) == 0) {
	top = elem = QueueTop(elem);
	while (elem != NULL) {
	    info = (char **) elem->q_data;	    
	    sprintf(buf,"The alias: %s currently describes the filesystem %s",
		    info[ALIAS_NAME], info[ALIAS_TRANS]);
	    Put_message(buf);
	    elem = elem->q_forw;
	}
	FreeQueue(top);
	return(DM_NORMAL);
    }
    else if ( stat != MR_NO_MATCH) {
	com_err(program_name, stat, " in CreateFSAlias.");
        return(DM_NORMAL);
    }

    args[ALIAS_TRANS]= Strsave("");
    args[ALIAS_END] = NULL;
    if (GetValueFromUser("Which filesystem will this alias point to?",
			 &args[ALIAS_TRANS]) == SUB_ERROR)
      return(DM_NORMAL);

    if ( (stat = do_mr_query("add_alias", 3, args, NullFunc, NULL)) != 0)
	com_err(program_name, stat, " in CreateFSAlias.");

    FreeInfo(args);
    return (DM_NORMAL);
}
    
/*	Function Name: RealDeleteFSAlias
 *	Description: Does the real deletion work.
 *	Arguments: info - array of char *'s containing all useful info.
 *                 one_item - a Boolean that is true if only one item 
 *                              in queue that dumped us here.
 *	Returns: none.
 */

void
RealDeleteFSAlias(info, one_item)
char ** info;
Bool one_item;
{
    int stat;
    char temp_buf[BUFSIZ];

/* 
 * Deletetions are  performed if the user hits 'y' on a list of multiple 
 * filesystem, or if the user confirms on a unique alias.
 */
    sprintf(temp_buf, 
	    "Are you sure that you want to delete the filesystem alias %s",
	    info[ALIAS_NAME]);
    if(!one_item || Confirm(temp_buf)) {
	if ( (stat = do_mr_query("delete_alias", CountArgs(info),
				  info, Scream, NULL)) != 0 )
	    com_err(program_name, stat, " filesystem alias not deleted.");
	else
	    Put_message("Filesystem alias deleted.");
    }
    else 
	Put_message("Filesystem alias not deleted.");
}

/*	Function Name: DeleteFSAlias
 *	Description: Delete an alias name for a filesystem
 *	Arguments: argc, argv - name of alias in argv[1].
 *	Returns: DM_NORMAL.
 *      NOTES:  This requires (name, type, transl)  I get {name, translation}
 *              from the user.  I provide type, which is well-known. 
 */

/* ARGSUSED */
int
DeleteFSAlias(argc, argv)
int argc;
char **argv;
{
    struct qelem *elem = GetFSInfo(ALIAS, argv[1]);
    QueryLoop(elem, PrintFSAlias, RealDeleteFSAlias,
	      "Delete the Filesystem Alias");
    FreeQueue(elem);
    return (DM_NORMAL);
}

/*	Function Name: AttachHelp
 *	Description: Print help info on attachmaint.
 *	Arguments: none
 *	Returns: DM_NORMAL.
 */

int
AttachHelp()
{
    static char *message[] = {
      "These are the options:",
      "",
      "get - get information about a filesystem.",
      "add - add a new filesystem to the data base.",
      "update - update the information in the database on a filesystem.",
      "delete - delete a filesystem from the database.",
      "check - check information about association of a name and a filesys.",
      "alias - associate a name with a filesystem.",
      "unalias - disassociate a name with a filesystem.",
      "verbose - toggle the request for delete confirmation.",
	NULL,
    };

    return(PrintHelp(message));
}

/*	Function Name: FSGroupHelp
 *	Description: Print help info on fsgroups.
 *	Arguments: none
 *	Returns: DM_NORMAL.
 */

int
FSGroupHelp()
{
    static char *message[] = {
	"A filesystem group is a named sorted list of filesystems.",
	"",
	"To create, modify, or delete a group itself, use the menu above",
	"  this one, and manipulate a filesystem of type FSGROUP.",
	"Options here are:",
	"  get - get info about a group and show its members",
	"  add - add a new member to a group.",
	"  remove - remove a member from a group.",
	"  order - change the sorting order of a group.",
	NULL
    };

    return(PrintHelp(message));
}