move.c

来自「ftam等标准协议服务器和客户端的源代码。」· C语言 代码 · 共 257 行

/* move.c - */

#ifndef	lint
static char *rcsid = "$Header: /xtel/isode/isode/quipu/dish/RCS/move.c,v 9.0 1992/06/16 12:35:39 isode Rel $";
#endif

/* 
 * $Header: /xtel/isode/isode/quipu/dish/RCS/move.c,v 9.0 1992/06/16 12:35:39 isode Rel $
 *
 *
 * $Log: move.c,v $
 * Revision 9.0  1992/06/16  12:35:39  isode
 * Release 8.0
 *
 */

/*
 *				  NOTICE
 *
 *    Acquisition, use, and distribution of this module and related
 *    materials are subject to the restrictions of a license agreement.
 *    Consult the Preface in the User's Manual for the full terms of
 *    this agreement.
 *
 */


#include "quipu/util.h"
#include "quipu/name.h"

extern DN       dn;

#define	OPT	(!frompipe || rps -> ps_byteno == 0 ? opt : rps)
#define	RPS	(!frompipe || opt -> ps_byteno == 0 ? rps : opt)
extern	char	frompipe;
extern	PS	opt, rps;

extern char move_flag;

DN	fixed_pos = NULLDN;

call_moveto (argc,argv)
int argc;
char ** argv;
{
char pwd_flag = FALSE;
char check_move = TRUE;
int x;

	if (argc == 1) {
		Usage (argv[0]);
		return;
	}
	
	move_flag = FALSE;

	for (x = 1; x < argc; x++) {
		if (test_arg (argv[x],"-pwd",1)) 
			pwd_flag = TRUE;
		else if (test_arg (argv[x],"-nopwd",3)) 
			pwd_flag = FALSE;
		else if (test_arg (argv[x],"-check",1)) 
			check_move = TRUE;
		else if (test_arg (argv[x],"-nocheck",3)) 
			check_move = FALSE;
		else if (test_arg (argv[x], "-sequence",3)) {
			if (x + 1 == argc) {	
				ps_printf (OPT, "We need a sequence name.\n");
				return;
			} else {
				shuffle_up (argc--, argv, x);
				set_sequence (argv[x]);
			}
		} else if (move (argv[x]) == OK) {
			if (move_flag == TRUE) {
				ps_print (RPS,"Too many parameters !\n");
				Usage (argv[0]);
				return;
			}
			move_flag = TRUE;
		} else {
			move_flag = FALSE;
			if (*argv[x] != '-')
				ps_printf (OPT,"Unknown entity '%s'\n",argv[x]);
			else
				Usage (argv[0]);
			return;
		}
	}

	if (check_move)
		if (test_move_dn() != TRUE) {
			move_flag = FALSE;
			return;
		}

	if (move_flag == TRUE)
		consolidate_move ();
		
	if (pwd_flag) {
		dn_print (RPS, fixed_pos, EDBOUT);
		ps_print (RPS, "\n");
	}

}

consolidate_move ()
{
	if (move_flag) {
		move_flag = FALSE;
		dn_free (fixed_pos);
		fixed_pos = dn_cpy (dn);
	}
}

set_current_pos ()
{
	move_flag = FALSE;
	dn_free (dn);
	dn = dn_cpy (fixed_pos);
}

move (arg)
char           *arg;
{
	extern int print_parse_errors;

	DN              user_down ();
	DN              str2dn_aux ();
	DN		sequence_dn();
	DN              tmpdn;
	char *		ptr;
	char		alias = FALSE;
	int		len;

	print_parse_errors = FALSE;

	if (*arg == '-') {
		print_parse_errors = TRUE;
		return (NOTOK);	   /* can't be a move if it starts with a minus */
	}

	if (*arg == '+')
		arg++;  /* old style call */

	ptr = arg;
	while (*ptr != 0) {
		if (! isdigit (*ptr))
			break;
		ptr++;
	}

	if (*ptr == 0) {
		/* sequence move */
		dn_free (dn);
		dn = dn_cpy (sequence_dn(atoi(arg)));
		print_parse_errors = TRUE;
		if (dn == NULLDN) {
			ps_printf (OPT,"Invalid sequence number %s\n",arg);
			return (NOTOK);
		} else
			return (OK);
	}

	len = strlen(arg);
	if ((arg[0] == '<') && ( arg[len-1] == '>')) {
	    dn_free(dn);
	    dn = str2dn(arg);
	    return (OK);
	}

	if ((ptr = index (arg,'@')) != NULLCP) {
		*ptr = 0;

		if (*arg == 0) {
			/* from root */
			dn_free (dn);
			dn = NULLDN;
			*ptr ='@';
			arg = ++ptr;
			if (*arg == 0) {
				print_parse_errors = TRUE;
				return (OK);    /* @ -> move to root */
			}
			if ((ptr = index (arg,'@')) != NULLCP)
				*ptr = 0;
		}
	} else {
		dn_free (dn);
		dn = dn_cpy (fixed_pos);
	}
	
	if (strcmp (arg,"..") == 0) {
		do {
			DN              dnptr;
			DN              trail;

			if (dn == NULLDN) {
				print_parse_errors = TRUE;
				ps_print (OPT, "Can't go back past root\n");
				return (NOTOK);
			}
			if (dn->dn_parent == NULLDN) {
				dn_free (dn);
		 		dn = NULLDN;
			} else {
				for (dnptr = dn; dnptr->dn_parent != NULLDN; dnptr = dnptr->dn_parent)
					trail = dnptr;

				dn_comp_free (dnptr);
				trail->dn_parent = NULLDN;
			}
			if  (ptr == NULLCP) {
				print_parse_errors = TRUE;
				return (OK);
			}
			arg = ++ptr;
			if ((ptr = index (arg,'@')) != NULLCP) 
				*ptr = 0;
		} while (strcmp (arg,"..") == 0);
	}

	if (ptr != NULL)
		*ptr = '@';
	
	if ((tmpdn = str2dn_aux (arg,&alias)) != NULLDN) {
		if (dn == NULLDN)
			dn = tmpdn;
		else {
			if (alias) {
				dn_free (dn);
				dn = tmpdn;
			} else
				dn_append (dn,tmpdn);
		}
		print_parse_errors = TRUE;
		return (OK);
	} else {
		print_parse_errors = TRUE;
		return (NOTOK);
	}
		
}

test_move_dn ()
{
char * name = "moveto";
	
	/* Might do something else here... */
	/* current policy is to read the entry and cache it ! */

	if (dn == NULLDN)
		return (TRUE);  /* assume root exists - read will fail */

	return (read_cache (1,&name));
}