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