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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* NAME
* cksaved - check for an orphaned save file
*
* SYNOPSIS
* void cksaved(char *user)
*
* DESCRIPTION
* cksaved() looks to see if there is a saved-mail file sitting
* around which should be reinstated. These files should be sitting
* around only in the case of a crash during rewriting a mail message.
*
* The strategy is simple: if the file exists it is appended to
* the end of $MAIL. It is better that a user potentially sees the
* mail twice than to lose it.
*
* If $MAIL doesn't exist, then a simple rename() will suffice.
*/
#include "mail.h"
void
cksaved(user)
char *user;
{
struct stat stbuf;
char command[512];
char save[MAXFILENAME], mail[MAXFILENAME];
cat(mail, maildir, user);
cat(save, mailsave, user);
/*
* If no save file, or size is 0, return.
*/
if ((stat(save, &stbuf) != 0) || (stbuf.st_size == 0))
return;
/*
* Ok, we have a savefile. If no mailfile exists,
* then we want to restore to the mailfile,
* else we append to the mailfile.
*/
lock(user);
if (stat(mail, &stbuf) != 0) {
/*
* Restore from the save file by linking
* it to $MAIL then unlinking save file
*/
chmod(save, MFMODE);
#ifdef SVR3
if (link(save, mail) != 0) {
unlock();
perror("Restore failed to link to mailfile");
return;
}
if (unlink(save) != 0) {
unlock();
perror("Cannot unlink saved file");
return;
}
#else
if (rename(save, mail) != 0) {
unlock();
perror("Cannot rename saved file");
return;
}
#endif
(void) snprintf(command, sizeof (command),
"echo \"Your mailfile was just restored by the mail "
"program.\nPermissions of your mailfile are set "
"to 0660.\"| mail %s", user);
}
else {
FILE *Istream, *Ostream;
if ((Ostream = fopen(mail, "a")) == NULL) {
(void) fprintf(stderr,
"%s: Cannot open file '%s' for output\n",
program, mail);
unlock();
return;
}
if ((Istream = fopen(save, "r")) == NULL) {
(void) fprintf(stderr, "%s: Cannot open saved "
"file '%s' for reading\n", program, save);
fclose(Ostream);
unlock();
return;
}
copystream(Istream, Ostream);
fclose(Istream);
fclose(Ostream);
if (unlink(save) != 0) {
perror("Unlink of save file failed");
return;
}
(void) snprintf(command, sizeof (command),
"echo \"Your mail save file has just been appended "
"to your mail box by the mail program.\" | mail %s", user);
}
/*
* Try to send mail to the user whose file
* is being restored.
*/
unlock();
systm(command);
}
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