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EDIT.C
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1991-01-11
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static char rcsid[] = "@(#)$Id: edit.c,v 4.1.1.1 90/07/12 22:43:05 syd Exp $";
/*******************************************************************************
* The Elm Mail System - $Revision: 4.1.1.1 $ $State: Exp $
*
* Copyright (c) 1986, 1987 Dave Taylor
* Copyright (c) 1988, 1989, 1990 USENET Community Trust
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Syd Weinstein, Elm Coordinator
* elm@DSI.COM dsinc!elm
*
*******************************************************************************
* $Log: edit.c,v $
* Revision 4.1.1.1 90/07/12 22:43:05 syd
* Make it aware of the fact that we loose the cursor position on
* some system calls, so set it far enough off an absolute move will
* be done on the next cursor address, and then place it where we want it.
* From: Syd, reported by Douglas Lamb
*
* Revision 4.1 90/04/28 22:42:46 syd
* checkin of Elm 2.3 as of Release PL0
*
*
******************************************************************************/
/** This routine is for allowing the user to edit their current folder
as they wish.
**/
#include "headers.h"
#include <errno.h>
extern int errno;
char *error_name(), *error_description(), *strcpy();
long bytes();
unsigned long sleep();
#ifdef ALLOW_MAILBOX_EDITING
edit_mailbox()
{
/** Allow the user to edit their folder, always resynchronizing
afterwards. Due to intense laziness on the part of the
programmer, this routine will invoke $EDITOR on the entire
file. The mailer will ALWAYS resync on the folder
even if nothing has changed since, not unreasonably, it's
hard to figure out what occurred in the edit session...
Also note that if the user wants to edit their incoming
mailbox they'll actually be editing the tempfile that is
an exact copy. More on how we resync in that case later
in this code.
**/
FILE *real_folder, *temp_folder;
char edited_file[SLEN], buffer[SLEN];
if(folder_type == SPOOL) {
if(save_file_stats(cur_folder) != 0) {
error1("Problems saving permissions of folder %s!", cur_folder);
Raw(ON);
sleep(2);
return(0);
}
}
PutLine0(LINES-1,0,"Invoking editor...");
strcpy(edited_file, (folder_type == NON_SPOOL ? cur_folder : cur_tempfolder));
sprintf(buffer, "%s %s", alternative_editor, edited_file);
Raw(OFF);
if (system_call(buffer, SH, TRUE, FALSE) != 0) {
error1("Problems invoking editor %s!", alternative_editor);
Raw(ON);
sleep(2);
return(0);
}
Raw(ON);
SetXYLocation(0, 40); /* a location not near the next request, so an absolute is used */
if (folder_type == SPOOL) { /* uh oh... now the toughie... */
if (bytes(cur_folder) != mailfile_size) {
/* SIGH. We've received mail since we invoked the editor
on the folder. We'll have to do some strange stuff to
remedy the problem... */
PutLine0(LINES, 0, "Warning: new mail received...");
CleartoEOLN();
if ((temp_folder = fopen(edited_file, "a")) == NULL) {
dprint(1, (debugfile,
"Attempt to open \"%s\" to append failed in %s\n",
edited_file, "edit_mailbox"));
set_error("Couldn't reopen tempfile. Edit LOST!");
return(1);
}
/** Now let's lock the folder up and stream the new stuff
into the temp file... **/
lock(OUTGOING);
if ((real_folder = fopen(cur_folder, "r")) == NULL) {
dprint(1, (debugfile,
"Attempt to open \"%s\" for reading new mail failed in %s\n",
cur_folder, "edit_mailbox"));
sprintf(buffer, "Couldn't open %s for reading! Edit LOST!",
cur_folder);
set_error(buffer);
unlock();
return(1);
}
if (fseek(real_folder, mailfile_size, 0) == -1) {
dprint(1, (debugfile,
"Couldn't seek to end of cur_folder (offset %ld) (%s)\n",
mailfile_size, "edit_mailbox"));
set_error("Couldn't seek to end of folder. Edit LOST!");
unlock();
return(1);
}
/** Now we can finally stream the new mail into the tempfile **/
while (fgets(buffer, SLEN, real_folder) != NULL)
fprintf(temp_folder, "%s", buffer);
fclose(real_folder);
fclose(temp_folder);
} else lock(OUTGOING);
/* remove real mail_file and then
* link or copy the edited mailfile to real mail_file */
(void)unlink(cur_folder);
if (copy(edited_file, cur_folder) != 0)
{
Write_to_screen(
"\l\rCouldn't copy %s to mailfile %s!\l\r",
2, edited_file, cur_folder);
Write_to_screen(
"\l\rYou'll need to check out %s for your mail.\l\r",
1, edited_file);
Write_to_screen("** %s - %s. **\l\r", 2,
error_name(errno), error_description(errno));
unlock(); /* ciao!*/
emergency_exit();
}
/* restore file permissions before removing lock */
if(restore_file_stats(cur_folder) != 1) {
error1("Problems restoring permissions of folder %s!", cur_folder);
Raw(ON);
sleep(2);
}
unlock();
unlink(edited_file); /* remove the edited mailfile */
error("Changes incorporated into new mail...");
} else
error("Resynchronizing with new version of folder...");
sleep(2);
ClearScreen();
newmbox(cur_folder, FALSE);
showscreen();
return(1);
}
#endif