4.3BSD/usr/src/ucb/Mail/quit.c
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
static char *sccsid = "@(#)quit.c 5.3 (Berkeley) 3/6/86";
#endif not lint
#include "rcv.h"
#include <sys/stat.h>
#include <sys/file.h>
/*
* Rcv -- receive mail rationally.
*
* Termination processing.
*/
/*
* Save all of the undetermined messages at the top of "mbox"
* Save all untouched messages back in the system mailbox.
* Remove the system mailbox, if none saved there.
*/
quit()
{
int mcount, p, modify, autohold, anystat, holdbit, nohold;
FILE *ibuf, *obuf, *fbuf, *rbuf, *readstat, *abuf;
register struct message *mp;
register int c;
extern char tempQuit[], tempResid[];
struct stat minfo;
char *id;
/*
* If we are read only, we can't do anything,
* so just return quickly.
*/
if (readonly)
return;
/*
* See if there any messages to save in mbox. If no, we
* can save copying mbox to /tmp and back.
*
* Check also to see if any files need to be preserved.
* Delete all untouched messages to keep them out of mbox.
* If all the messages are to be preserved, just exit with
* a message.
*
* If the luser has sent mail to himself, refuse to do
* anything with the mailbox, unless mail locking works.
*/
fbuf = fopen(mailname, "r");
if (fbuf == NULL)
goto newmail;
flock(fileno(fbuf), LOCK_EX);
#ifndef CANLOCK
if (selfsent) {
printf("You have new mail.\n");
fclose(fbuf);
return;
}
#endif
rbuf = NULL;
if (fstat(fileno(fbuf), &minfo) >= 0 && minfo.st_size > mailsize) {
printf("New mail has arrived.\n");
rbuf = fopen(tempResid, "w");
if (rbuf == NULL || fbuf == NULL)
goto newmail;
#ifdef APPEND
fseek(fbuf, mailsize, 0);
while ((c = getc(fbuf)) != EOF)
putc(c, rbuf);
#else
p = minfo.st_size - mailsize;
while (p-- > 0) {
c = getc(fbuf);
if (c == EOF)
goto newmail;
putc(c, rbuf);
}
#endif
fclose(rbuf);
if ((rbuf = fopen(tempResid, "r")) == NULL)
goto newmail;
remove(tempResid);
}
/*
* Adjust the message flags in each message.
*/
anystat = 0;
autohold = value("hold") != NOSTR;
holdbit = autohold ? MPRESERVE : MBOX;
nohold = MBOX|MSAVED|MDELETED|MPRESERVE;
if (value("keepsave") != NOSTR)
nohold &= ~MSAVED;
for (mp = &message[0]; mp < &message[msgCount]; mp++) {
if (mp->m_flag & MNEW) {
mp->m_flag &= ~MNEW;
mp->m_flag |= MSTATUS;
}
if (mp->m_flag & MSTATUS)
anystat++;
if ((mp->m_flag & MTOUCH) == 0)
mp->m_flag |= MPRESERVE;
if ((mp->m_flag & nohold) == 0)
mp->m_flag |= holdbit;
}
modify = 0;
if (Tflag != NOSTR) {
if ((readstat = fopen(Tflag, "w")) == NULL)
Tflag = NOSTR;
}
for (c = 0, p = 0, mp = &message[0]; mp < &message[msgCount]; mp++) {
if (mp->m_flag & MBOX)
c++;
if (mp->m_flag & MPRESERVE)
p++;
if (mp->m_flag & MODIFY)
modify++;
if (Tflag != NOSTR && (mp->m_flag & (MREAD|MDELETED)) != 0) {
id = hfield("article-id", mp);
if (id != NOSTR)
fprintf(readstat, "%s\n", id);
}
}
if (Tflag != NOSTR)
fclose(readstat);
if (p == msgCount && !modify && !anystat) {
if (p == 1)
printf("Held 1 message in %s\n", mailname);
else
printf("Held %2d messages in %s\n", p, mailname);
fclose(fbuf);
return;
}
if (c == 0) {
if (p != 0) {
writeback(rbuf);
fclose(fbuf);
return;
}
goto cream;
}
/*
* Create another temporary file and copy user's mbox file
* darin. If there is no mbox, copy nothing.
* If he has specified "append" don't copy his mailbox,
* just copy saveable entries at the end.
*/
mcount = c;
if (value("append") == NOSTR) {
if ((obuf = fopen(tempQuit, "w")) == NULL) {
perror(tempQuit);
fclose(fbuf);
return;
}
if ((ibuf = fopen(tempQuit, "r")) == NULL) {
perror(tempQuit);
remove(tempQuit);
fclose(obuf);
fclose(fbuf);
return;
}
remove(tempQuit);
if ((abuf = fopen(mbox, "r")) != NULL) {
while ((c = getc(abuf)) != EOF)
putc(c, obuf);
fclose(abuf);
}
if (ferror(obuf)) {
perror(tempQuit);
fclose(ibuf);
fclose(obuf);
fclose(fbuf);
return;
}
fclose(obuf);
close(creat(mbox, 0600));
if ((obuf = fopen(mbox, "r+")) == NULL) {
perror(mbox);
fclose(ibuf);
fclose(fbuf);
return;
}
}
if (value("append") != NOSTR) {
if ((obuf = fopen(mbox, "a")) == NULL) {
perror(mbox);
fclose(fbuf);
return;
}
fchmod(fileno(obuf), 0600);
}
for (mp = &message[0]; mp < &message[msgCount]; mp++)
if (mp->m_flag & MBOX)
if (send(mp, obuf, 0) < 0) {
perror(mbox);
fclose(ibuf);
fclose(obuf);
fclose(fbuf);
return;
}
/*
* Copy the user's old mbox contents back
* to the end of the stuff we just saved.
* If we are appending, this is unnecessary.
*/
if (value("append") == NOSTR) {
rewind(ibuf);
c = getc(ibuf);
while (c != EOF) {
putc(c, obuf);
if (ferror(obuf))
break;
c = getc(ibuf);
}
fclose(ibuf);
fflush(obuf);
}
trunc(obuf);
if (ferror(obuf)) {
perror(mbox);
fclose(obuf);
fclose(fbuf);
return;
}
fclose(obuf);
if (mcount == 1)
printf("Saved 1 message in mbox\n");
else
printf("Saved %d messages in mbox\n", mcount);
/*
* Now we are ready to copy back preserved files to
* the system mailbox, if any were requested.
*/
if (p != 0) {
writeback(rbuf);
fclose(fbuf);
return;
}
/*
* Finally, remove his /usr/mail file.
* If new mail has arrived, copy it back.
*/
cream:
if (rbuf != NULL) {
abuf = fopen(mailname, "r+");
if (abuf == NULL)
goto newmail;
while ((c = getc(rbuf)) != EOF)
putc(c, abuf);
fclose(rbuf);
trunc(abuf);
fclose(abuf);
alter(mailname);
fclose(fbuf);
return;
}
demail();
fclose(fbuf);
return;
newmail:
printf("Thou hast new mail.\n");
if (fbuf != NULL)
fclose(fbuf);
}
/*
* Preserve all the appropriate messages back in the system
* mailbox, and print a nice message indicated how many were
* saved. On any error, just return -1. Else return 0.
* Incorporate the any new mail that we found.
*/
writeback(res)
register FILE *res;
{
register struct message *mp;
register int p, c;
FILE *obuf;
p = 0;
if ((obuf = fopen(mailname, "r+")) == NULL) {
perror(mailname);
return(-1);
}
#ifndef APPEND
if (res != NULL)
while ((c = getc(res)) != EOF)
putc(c, obuf);
#endif
for (mp = &message[0]; mp < &message[msgCount]; mp++)
if ((mp->m_flag&MPRESERVE)||(mp->m_flag&MTOUCH)==0) {
p++;
if (send(mp, obuf, 0) < 0) {
perror(mailname);
fclose(obuf);
return(-1);
}
}
#ifdef APPEND
if (res != NULL)
while ((c = getc(res)) != EOF)
putc(c, obuf);
#endif
fflush(obuf);
trunc(obuf);
if (ferror(obuf)) {
perror(mailname);
fclose(obuf);
return(-1);
}
if (res != NULL)
fclose(res);
fclose(obuf);
alter(mailname);
if (p == 1)
printf("Held 1 message in %s\n", mailname);
else
printf("Held %d messages in %s\n", p, mailname);
return(0);
}