xref: /illumos-gate/usr/src/cmd/lp/lib/filters/delfilter.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23 /*	  All Rights Reserved  	*/
24 
25 
26 #ident	"%Z%%M%	%I%	%E% SMI"	/* SVr4.0 1.7	*/
27 /* EMACS_MODES: !fill, lnumb, !overwrite, !nodelete, !picture */
28 
29 #include "errno.h"
30 #include "string.h"
31 #include "stdlib.h"
32 
33 #include "lp.h"
34 #include "filters.h"
35 
36 /**
37  ** delfilter() - DELETE A FILTER FROM FILTER TABLE
38  **/
39 
40 int
41 #if	defined(__STDC__)
delfilter(char * name)42 delfilter (
43 	char *			name
44 )
45 #else
46 delfilter (name)
47 	char			*name;
48 #endif
49 {
50 	register _FILTER	*pf;
51 
52 
53 	if (!name || !*name) {
54 		errno = EINVAL;
55 		return (-1);
56 	}
57 
58 	if (STREQU(NAME_ALL, name)) {
59 		trash_filters ();
60 		goto Done;
61 	}
62 
63 	/*
64 	 * Don't need to check for ENOENT, because if it is set,
65 	 * well that's what we want to return anyway!
66 	 */
67 	if (!filters && get_and_load() == -1 /* && errno != ENOENT */ )
68 		return (-1);
69 
70 	if (!(pf = search_filter(name))) {
71 		errno = ENOENT;
72 		return (-1);
73 	}
74 
75 	free_filter (pf);
76 	for (; pf->name; pf++)
77 		*pf = *(pf+1);
78 
79 	nfilters--;
80 	filters = (_FILTER *)Realloc(
81 		(char *)filters, (nfilters + 1) * sizeof(_FILTER)
82 	);
83 	if (!filters) {
84 		errno = ENOMEM;
85 		return (-1);
86 	}
87 
88 /*	filters[nfilters].name = 0; */	/* last for loop above did this */
89 
90 Done:	return (dumpfilters((char *)0));
91 }
92