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 /*
23 * Copyright 1994 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30
31 /*
32 * University Copyright- Copyright (c) 1982, 1986, 1988
33 * The Regents of the University of California
34 * All Rights Reserved
35 *
36 * University Acknowledgment- Portions of this document are derived from
37 * software developed by the University of California, Berkeley, and its
38 * contributors.
39 */
40
41 #pragma ident "%Z%%M% %I% %E% SMI"
42
43 #include "rcv.h"
44
45 #undef fopen
46 #undef fclose
47
48 /*
49 * mailx -- a modified version of a University of California at Berkeley
50 * mail program
51 *
52 * Local version of fopen() and fclose(). These maintain a list of
53 * file pointers which can be run down when we need to close
54 * all files, such as before executing external commands.
55 */
56
57 static NODE *append();
58 static NODE *del1();
59 static NODE *getnode();
60 static NODE *search();
61
62 static NODE *
getnode(FILE * fp)63 getnode(FILE *fp)
64 {
65 NODE *newnode;
66
67 if ((newnode = (NODE *)malloc(sizeof(NODE))) == (NODE *)NULL) {
68 (void) fputs("Cannot allocate node space\n", stderr);
69 exit(3);
70 }
71 newnode->fp = fp;
72 newnode->next = (NODE *)NULL;
73 return(newnode);
74 }
75
76 static NODE *
search(FILE * fp)77 search(FILE *fp)
78 {
79 register NODE *tmp;
80
81 for (tmp = fplist; tmp != (NODE *)NULL; tmp = tmp->next)
82 if (tmp->fp == fp)
83 break;
84 return( tmp != (NODE *)NULL ? tmp : NOFP);
85 }
86
87 static NODE *
append(FILE * fp)88 append(FILE *fp)
89 {
90 register NODE *newnode;
91
92 if ((newnode = getnode(fp)) == (NODE *)NULL)
93 return(NOFP);
94 if (fplist == NOFP) {
95 fplist = newnode;
96 } else {
97 newnode->next = curptr->next;
98 curptr->next = newnode;
99 }
100 return(newnode);
101 }
102
103 static NODE *
del1(NODE * oldcur)104 del1(NODE *oldcur)
105 {
106 register NODE *cur, *prev;
107
108 for (prev = cur = fplist; cur != (NODE *)NULL; cur = cur->next) {
109 if (cur == oldcur) {
110 if (cur == fplist) {
111 cur = fplist = cur->next;
112 } else {
113 prev->next = cur->next;
114 cur = prev->next ? prev->next : prev;
115 }
116 if (curptr == oldcur)
117 curptr = prev;
118 free(oldcur);
119 break;
120 }
121 prev = cur;
122 }
123 return(cur);
124 }
125
126 FILE *
my_fopen(char * file,char * mode)127 my_fopen(char *file, char *mode)
128 {
129 FILE *fp;
130
131 if ((fp = fopen(file, mode)) == (FILE *)NULL) {
132 fplist = NOFP;
133 return(fp);
134 } else {
135 curptr = append(fp);
136 }
137 return(fp);
138 }
139
140 int
my_fclose(register FILE * iop)141 my_fclose(register FILE *iop)
142 {
143 register NODE *cur;
144
145 int ret = fclose(iop);
146 if (fplist != NOFP) {
147 cur = search(iop);
148 cur = del1(cur);
149 }
150 return ret;
151 }
152