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 #pragma ident "%Z%%M% %I% %E% SMI"
26
27 /*
28 * NAME
29 * cksaved - check for an orphaned save file
30 *
31 * SYNOPSIS
32 * void cksaved(char *user)
33 *
34 * DESCRIPTION
35 * cksaved() looks to see if there is a saved-mail file sitting
36 * around which should be reinstated. These files should be sitting
37 * around only in the case of a crash during rewriting a mail message.
38 *
39 * The strategy is simple: if the file exists it is appended to
40 * the end of $MAIL. It is better that a user potentially sees the
41 * mail twice than to lose it.
42 *
43 * If $MAIL doesn't exist, then a simple rename() will suffice.
44 */
45
46 #include "mail.h"
47 void
cksaved(user)48 cksaved(user)
49 char *user;
50 {
51 struct stat stbuf;
52 char command[512];
53 char save[MAXFILENAME], mail[MAXFILENAME];
54
55 cat(mail, maildir, user);
56 cat(save, mailsave, user);
57
58 /*
59 * If no save file, or size is 0, return.
60 */
61 if ((stat(save, &stbuf) != 0) || (stbuf.st_size == 0))
62 return;
63
64 /*
65 * Ok, we have a savefile. If no mailfile exists,
66 * then we want to restore to the mailfile,
67 * else we append to the mailfile.
68 */
69 lock(user);
70 if (stat(mail, &stbuf) != 0) {
71 /*
72 * Restore from the save file by linking
73 * it to $MAIL then unlinking save file
74 */
75 chmod(save, MFMODE);
76 #ifdef SVR3
77 if (link(save, mail) != 0) {
78 unlock();
79 perror("Restore failed to link to mailfile");
80 return;
81 }
82
83 if (unlink(save) != 0) {
84 unlock();
85 perror("Cannot unlink saved file");
86 return;
87 }
88 #else
89 if (rename(save, mail) != 0) {
90 unlock();
91 perror("Cannot rename saved file");
92 return;
93 }
94 #endif
95
96 (void) snprintf(command, sizeof (command),
97 "echo \"Your mailfile was just restored by the mail "
98 "program.\nPermissions of your mailfile are set "
99 "to 0660.\"| mail %s", user);
100 }
101
102 else {
103 FILE *Istream, *Ostream;
104 if ((Ostream = fopen(mail, "a")) == NULL) {
105 (void) fprintf(stderr,
106 "%s: Cannot open file '%s' for output\n",
107 program, mail);
108 unlock();
109 return;
110 }
111 if ((Istream = fopen(save, "r")) == NULL) {
112 (void) fprintf(stderr, "%s: Cannot open saved "
113 "file '%s' for reading\n", program, save);
114 fclose(Ostream);
115 unlock();
116 return;
117 }
118 copystream(Istream, Ostream);
119 fclose(Istream);
120 fclose(Ostream);
121
122 if (unlink(save) != 0) {
123 perror("Unlink of save file failed");
124 return;
125 }
126
127 (void) snprintf(command, sizeof (command),
128 "echo \"Your mail save file has just been appended "
129 "to your mail box by the mail program.\" | mail %s", user);
130 }
131
132 /*
133 * Try to send mail to the user whose file
134 * is being restored.
135 */
136 unlock();
137 systm(command);
138 }
139