Initial revision
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@107 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Björn Groenvall
203
appl/popper/pop_updt.c
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203
appl/popper/pop_updt.c
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/*
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* Copyright (c) 1989 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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#ifndef lint
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static char copyright[] = "Copyright (c) 1990 Regents of the University of California.\nAll rights reserved.\n";
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static char SccsId[] = "@(#)@(#)pop_updt.c 2.3 2.3 3/20/91";
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#endif not lint
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#include <errno.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <strings.h>
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#include <sys/stat.h>
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#include <sys/file.h>
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#include "popper.h"
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extern int errno;
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static char standard_error[] =
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"Error error updating primary drop. Mailbox unchanged";
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/*
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* updt: Apply changes to a user's POP maildrop
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*/
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int pop_updt (p)
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POP * p;
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{
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FILE * md; /* Stream pointer for
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the user's maildrop */
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int mfd; /* File descriptor for
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above */
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char buffer[BUFSIZ]; /* Read buffer */
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MsgInfoList * mp; /* Pointer to message
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info list */
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register int msg_num; /* Current message
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counter */
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register int status_written; /* Status header field
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written */
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int nchar; /* Bytes read/written */
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long offset; /* New mail offset */
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#ifdef DEBUG
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if (p->debug) {
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pop_log(p,POP_DEBUG,"Performing maildrop update...");
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pop_log(p,POP_DEBUG,"Checking to see if all messages were deleted");
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}
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#endif DEBUG
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if (p->msgs_deleted == p->msg_count) {
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/* Truncate before close, to avoid race condition, DO NOT UNLINK!
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Another process may have opened, and not yet tried to lock */
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(void)ftruncate ((int)fileno(p->drop),0);
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(void)fclose(p->drop) ;
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return (POP_SUCCESS);
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}
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#ifdef DEBUG
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if (p->debug)
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pop_log(p,POP_DEBUG,"Opening mail drop \"%s\"",p->drop_name);
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#endif DEBUG
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/* Open the user's real maildrop */
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if ((mfd = open(p->drop_name,O_RDWR|O_CREAT,0600)) == -1 ||
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(md = fdopen(mfd,"r+")) == NULL) {
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return pop_msg(p,POP_FAILURE,standard_error);
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}
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/* Lock the user's real mail drop */
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if ( flock(mfd,LOCK_EX) == -1 ) {
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(void)fclose(md) ;
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return pop_msg(p,POP_FAILURE, "flock: '%s': %s", p->temp_drop,
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(errno < sys_nerr) ? sys_errlist[errno] : "");
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}
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/* Go to the right places */
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offset = lseek((int)fileno(p->drop),0,L_XTND) ;
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/* Append any messages that may have arrived during the session
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to the temporary maildrop */
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while ((nchar=read(mfd,buffer,BUFSIZ)) > 0)
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if ( nchar != write((int)fileno(p->drop),buffer,nchar) ) {
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nchar = -1;
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break ;
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}
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if ( nchar != 0 ) {
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(void)fclose(md) ;
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(void)ftruncate((int)fileno(p->drop),(int)offset) ;
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(void)fclose(p->drop) ;
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return pop_msg(p,POP_FAILURE,standard_error);
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}
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rewind(md);
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(void)ftruncate(mfd,0) ;
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/* Synch stdio and the kernel for the POP drop */
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rewind(p->drop);
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(void)lseek((int)fileno(p->drop),0,L_SET);
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/* Transfer messages not flagged for deletion from the temporary
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maildrop to the new maildrop */
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#ifdef DEBUG
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if (p->debug)
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pop_log(p,POP_DEBUG,"Creating new maildrop \"%s\" from \"%s\"",
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p->drop_name,p->temp_drop);
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#endif DEBUG
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for (msg_num = 0; msg_num < p->msg_count; ++msg_num) {
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int doing_body;
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/* Get a pointer to the message information list */
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mp = &p->mlp[msg_num];
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if (mp->del_flag) {
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#ifdef DEBUG
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if(p->debug)
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pop_log(p,POP_DEBUG,
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"Message %d flagged for deletion.",mp->number);
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#endif DEBUG
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continue;
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}
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(void)fseek(p->drop,mp->offset,0);
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#ifdef DEBUG
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if(p->debug)
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pop_log(p,POP_DEBUG,"Copying message %d.",mp->number);
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#endif DEBUG
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for(status_written = doing_body = 0 ;
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fgets(buffer,MAXMSGLINELEN,p->drop);) {
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if (doing_body == 0) { /* Header */
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/* Update the message status */
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if (strncasecmp(buffer,"Status:",7) == 0) {
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if (mp->retr_flag)
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(void)fputs("Status: RO\n",md);
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else
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(void)fputs(buffer, md);
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status_written++;
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continue;
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}
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/* A blank line signals the end of the header. */
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if (*buffer == '\n') {
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doing_body = 1;
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if (status_written == 0) {
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if (mp->retr_flag)
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(void)fputs("Status: RO\n\n",md);
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else
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(void)fputs("Status: U\n\n",md);
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}
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else (void)fputs ("\n", md);
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continue;
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}
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/* Save another header line */
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(void)fputs (buffer, md);
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}
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else { /* Body */
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if (strncmp(buffer,"From ",5) == 0) break;
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(void)fputs (buffer, md);
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}
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}
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}
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/* flush and check for errors now! The new mail will writen
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without stdio, since we need not separate messages */
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(void)fflush(md) ;
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if (ferror(md)) {
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(void)ftruncate(mfd,0) ;
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(void)fclose(md) ;
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(void)fclose(p->drop) ;
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return pop_msg(p,POP_FAILURE,standard_error);
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}
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/* Go to start of new mail if any */
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(void)lseek((int)fileno(p->drop),offset,L_SET);
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while((nchar=read((int)fileno(p->drop),buffer,BUFSIZ)) > 0)
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if ( nchar != write(mfd,buffer,nchar) ) {
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nchar = -1;
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break ;
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}
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if ( nchar != 0 ) {
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(void)ftruncate(mfd,0) ;
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(void)fclose(md) ;
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(void)fclose(p->drop) ;
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return pop_msg(p,POP_FAILURE,standard_error);
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}
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/* Close the maildrop and empty temporary maildrop */
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(void)fclose(md);
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(void)ftruncate((int)fileno(p->drop),0);
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(void)fclose(p->drop);
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return(pop_quit(p));
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}
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172
appl/popper/popper.h
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172
appl/popper/popper.h
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@@ -0,0 +1,172 @@
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/*
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* Copyright (c) 1989 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*
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* static char copyright[] = "Copyright (c) 1990 Regents of the University of California.\nAll rights reserved.\n";
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* static char SccsId[] = "@(#)@(#)popper.h 2.2 2.2 4/2/91";
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*
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*/
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/* LINTLIBRARY */
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/*
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* Header file for the POP programs
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*/
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#include <syslog.h>
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#include "version.h"
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#define NULLCP ((char *) 0)
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#define SPACE 32
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#define TAB 9
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#define TRUE 1
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#define FALSE 0
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#define NEWLINE '\n'
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#define MAXHOSTNAMELEN 256
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#define MAXUSERNAMELEN 65
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#define MAXDROPLEN 64
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#define MAXLINELEN 1024
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#define MAXMSGLINELEN 1024
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#define MAXCMDLEN 4
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#define MAXPARMCOUNT 5
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#define MAXPARMLEN 10
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#define ALLOC_MSGS 20
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#define MAIL_COMMAND "/usr/lib/sendmail"
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#define POP_FACILITY LOG_LOCAL0
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#define POP_PRIORITY LOG_NOTICE
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#define POP_DEBUG LOG_DEBUG
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#define POP_LOGOPTS 0
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#define POP_MAILDIR "/usr/spool/mail"
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#define POP_DROP "/usr/spool/mail/.%s.pop"
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/* POP_TMPSIZE needs to be big enough to hold the string
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* defined by POP_TMPDROP. POP_DROP and POP_TMPDROP
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* must be in the same filesystem.
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*/
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#define POP_TMPDROP "/usr/spool/mail/tmpXXXXXX"
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#define POP_TMPSIZE 256
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#define POP_TMPXMIT "/tmp/xmitXXXXXX"
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#define POP_OK "+OK"
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#define POP_ERR "-ERR"
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#define POP_SUCCESS 1
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#define POP_FAILURE 0
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#define POP_TERMINATE '.'
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extern int errno;
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extern int sys_nerr;
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extern char * sys_errlist[];
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extern char * sys_siglist[];
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#define pop_command pop_parm[0] /* POP command is first token */
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#define pop_subcommand pop_parm[1] /* POP XTND subcommand is the
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second token */
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typedef enum { /* POP processing states */
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auth1, /* Authorization: waiting for
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USER command */
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auth2, /* Authorization: waiting for
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PASS command */
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trans, /* Transaction */
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update, /* Update: session ended,
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process maildrop changes */
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halt, /* (Halt): stop processing
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and exit */
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error /* (Error): something really
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bad happened */
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} state;
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typedef struct { /* State information for
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each POP command */
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state ValidCurrentState; /* The operating state of
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the command */
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char * command; /* The POP command */
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int min_parms; /* Minimum number of parms
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for the command */
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int max_parms; /* Maximum number of parms
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for the command */
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int (*function) (); /* The function that process
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the command */
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state result[2]; /* The resulting state after
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command processing */
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#define success_state result[0] /* State when a command
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succeeds */
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} state_table;
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typedef struct { /* Table of extensions */
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char * subcommand; /* The POP XTND subcommand */
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int min_parms; /* Minimum number of parms for
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the subcommand */
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int max_parms; /* Maximum number of parms for
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the subcommand */
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int (*function) (); /* The function that processes
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the subcommand */
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} xtnd_table;
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typedef struct { /* Message information */
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int number; /* Message number relative to
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the beginning of list */
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long length; /* Length of message in
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bytes */
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int lines; /* Number of (null-terminated) lines in the message */
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long offset; /* Offset from beginning of
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file */
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int del_flag; /* Flag indicating if message
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is marked for deletion */
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int retr_flag; /* Flag indicating if message
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was retrieved */
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} MsgInfoList;
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typedef struct { /* POP parameter block */
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int debug; /* Debugging requested */
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char * myname; /* The name of this POP
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daemon program */
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char myhost[MAXHOSTNAMELEN]; /* The name of our host
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computer */
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char * client; /* Canonical name of client
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computer */
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char * ipaddr; /* Dotted-notation format of
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client IP address */
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unsigned short ipport; /* Client port for privileged
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operations */
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char user[MAXUSERNAMELEN]; /* Name of the POP user */
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state CurrentState; /* The current POP operational state */
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MsgInfoList * mlp; /* Message information list */
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int msg_count; /* Number of messages in
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the maildrop */
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int msgs_deleted; /* Number of messages flagged
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for deletion */
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int last_msg; /* Last message touched by
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the user */
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long bytes_deleted; /* Number of maildrop bytes
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flagged for deletion */
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char drop_name[MAXDROPLEN]; /* The name of the user's
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maildrop */
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char temp_drop[MAXDROPLEN]; /* The name of the user's
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temporary maildrop */
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long drop_size; /* Size of the maildrop in
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bytes */
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FILE * drop; /* (Temporary) mail drop */
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FILE * input; /* Input TCP/IP communication
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stream */
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FILE * output; /* Output TCP/IP communication stream */
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FILE * trace; /* Debugging trace file */
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char * pop_parm[MAXPARMCOUNT]; /* Parse POP parameter list */
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int parm_count; /* Number of parameters in
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parsed list */
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} POP;
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extern int pop_dele();
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extern int pop_last();
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extern int pop_list();
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extern int pop_pass();
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extern int pop_quit();
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extern int pop_rset();
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extern int pop_send();
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extern int pop_stat();
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extern int pop_updt();
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extern int pop_user();
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extern int pop_xtnd();
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extern int pop_xmit();
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