1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
23*0Sstevel@tonic-gate /* All Rights Reserved */
24*0Sstevel@tonic-gate
25*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate /*
28*0Sstevel@tonic-gate * NAME
29*0Sstevel@tonic-gate * cksaved - check for an orphaned save file
30*0Sstevel@tonic-gate *
31*0Sstevel@tonic-gate * SYNOPSIS
32*0Sstevel@tonic-gate * void cksaved(char *user)
33*0Sstevel@tonic-gate *
34*0Sstevel@tonic-gate * DESCRIPTION
35*0Sstevel@tonic-gate * cksaved() looks to see if there is a saved-mail file sitting
36*0Sstevel@tonic-gate * around which should be reinstated. These files should be sitting
37*0Sstevel@tonic-gate * around only in the case of a crash during rewriting a mail message.
38*0Sstevel@tonic-gate *
39*0Sstevel@tonic-gate * The strategy is simple: if the file exists it is appended to
40*0Sstevel@tonic-gate * the end of $MAIL. It is better that a user potentially sees the
41*0Sstevel@tonic-gate * mail twice than to lose it.
42*0Sstevel@tonic-gate *
43*0Sstevel@tonic-gate * If $MAIL doesn't exist, then a simple rename() will suffice.
44*0Sstevel@tonic-gate */
45*0Sstevel@tonic-gate
46*0Sstevel@tonic-gate #include "mail.h"
47*0Sstevel@tonic-gate void
cksaved(user)48*0Sstevel@tonic-gate cksaved(user)
49*0Sstevel@tonic-gate char *user;
50*0Sstevel@tonic-gate {
51*0Sstevel@tonic-gate struct stat stbuf;
52*0Sstevel@tonic-gate char command[512];
53*0Sstevel@tonic-gate char save[MAXFILENAME], mail[MAXFILENAME];
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate cat(mail, maildir, user);
56*0Sstevel@tonic-gate cat(save, mailsave, user);
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate /*
59*0Sstevel@tonic-gate * If no save file, or size is 0, return.
60*0Sstevel@tonic-gate */
61*0Sstevel@tonic-gate if ((stat(save, &stbuf) != 0) || (stbuf.st_size == 0))
62*0Sstevel@tonic-gate return;
63*0Sstevel@tonic-gate
64*0Sstevel@tonic-gate /*
65*0Sstevel@tonic-gate * Ok, we have a savefile. If no mailfile exists,
66*0Sstevel@tonic-gate * then we want to restore to the mailfile,
67*0Sstevel@tonic-gate * else we append to the mailfile.
68*0Sstevel@tonic-gate */
69*0Sstevel@tonic-gate lock(user);
70*0Sstevel@tonic-gate if (stat(mail, &stbuf) != 0) {
71*0Sstevel@tonic-gate /*
72*0Sstevel@tonic-gate * Restore from the save file by linking
73*0Sstevel@tonic-gate * it to $MAIL then unlinking save file
74*0Sstevel@tonic-gate */
75*0Sstevel@tonic-gate chmod(save, MFMODE);
76*0Sstevel@tonic-gate #ifdef SVR3
77*0Sstevel@tonic-gate if (link(save, mail) != 0) {
78*0Sstevel@tonic-gate unlock();
79*0Sstevel@tonic-gate perror("Restore failed to link to mailfile");
80*0Sstevel@tonic-gate return;
81*0Sstevel@tonic-gate }
82*0Sstevel@tonic-gate
83*0Sstevel@tonic-gate if (unlink(save) != 0) {
84*0Sstevel@tonic-gate unlock();
85*0Sstevel@tonic-gate perror("Cannot unlink saved file");
86*0Sstevel@tonic-gate return;
87*0Sstevel@tonic-gate }
88*0Sstevel@tonic-gate #else
89*0Sstevel@tonic-gate if (rename(save, mail) != 0) {
90*0Sstevel@tonic-gate unlock();
91*0Sstevel@tonic-gate perror("Cannot rename saved file");
92*0Sstevel@tonic-gate return;
93*0Sstevel@tonic-gate }
94*0Sstevel@tonic-gate #endif
95*0Sstevel@tonic-gate
96*0Sstevel@tonic-gate (void) snprintf(command, sizeof (command),
97*0Sstevel@tonic-gate "echo \"Your mailfile was just restored by the mail "
98*0Sstevel@tonic-gate "program.\nPermissions of your mailfile are set "
99*0Sstevel@tonic-gate "to 0660.\"| mail %s", user);
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate
102*0Sstevel@tonic-gate else {
103*0Sstevel@tonic-gate FILE *Istream, *Ostream;
104*0Sstevel@tonic-gate if ((Ostream = fopen(mail, "a")) == NULL) {
105*0Sstevel@tonic-gate (void) fprintf(stderr,
106*0Sstevel@tonic-gate "%s: Cannot open file '%s' for output\n",
107*0Sstevel@tonic-gate program, mail);
108*0Sstevel@tonic-gate unlock();
109*0Sstevel@tonic-gate return;
110*0Sstevel@tonic-gate }
111*0Sstevel@tonic-gate if ((Istream = fopen(save, "r")) == NULL) {
112*0Sstevel@tonic-gate (void) fprintf(stderr, "%s: Cannot open saved "
113*0Sstevel@tonic-gate "file '%s' for reading\n", program, save);
114*0Sstevel@tonic-gate fclose(Ostream);
115*0Sstevel@tonic-gate unlock();
116*0Sstevel@tonic-gate return;
117*0Sstevel@tonic-gate }
118*0Sstevel@tonic-gate copystream(Istream, Ostream);
119*0Sstevel@tonic-gate fclose(Istream);
120*0Sstevel@tonic-gate fclose(Ostream);
121*0Sstevel@tonic-gate
122*0Sstevel@tonic-gate if (unlink(save) != 0) {
123*0Sstevel@tonic-gate perror("Unlink of save file failed");
124*0Sstevel@tonic-gate return;
125*0Sstevel@tonic-gate }
126*0Sstevel@tonic-gate
127*0Sstevel@tonic-gate (void) snprintf(command, sizeof (command),
128*0Sstevel@tonic-gate "echo \"Your mail save file has just been appended "
129*0Sstevel@tonic-gate "to your mail box by the mail program.\" | mail %s", user);
130*0Sstevel@tonic-gate }
131*0Sstevel@tonic-gate
132*0Sstevel@tonic-gate /*
133*0Sstevel@tonic-gate * Try to send mail to the user whose file
134*0Sstevel@tonic-gate * is being restored.
135*0Sstevel@tonic-gate */
136*0Sstevel@tonic-gate unlock();
137*0Sstevel@tonic-gate systm(command);
138*0Sstevel@tonic-gate }
139