meillo@0: /*  MasqMail
meillo@0:     Copyright (C) 1999-2001 Oliver Kurth
meillo@0: 
meillo@0:     This program is free software; you can redistribute it and/or modify
meillo@0:     it under the terms of the GNU General Public License as published by
meillo@0:     the Free Software Foundation; either version 2 of the License, or
meillo@0:     (at your option) any later version.
meillo@0: 
meillo@0:     This program is distributed in the hope that it will be useful,
meillo@0:     but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0:     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
meillo@0:     GNU General Public License for more details.
meillo@0: 
meillo@0:     You should have received a copy of the GNU General Public License
meillo@0:     along with this program; if not, write to the Free Software
meillo@0:     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0: */
meillo@0: 
meillo@0: #include "masqmail.h"
meillo@0: #include <sys/stat.h>
meillo@0: #include "dotlock.h"
meillo@0: 
meillo@0: static
meillo@0: gint read_line(FILE *in, gchar *buf, gint buf_len)
meillo@0: {
meillo@0:   gint p = 0;
meillo@0:   gint c;
meillo@0: 
meillo@0:   while((c = getc(in)) != '\n' && (c != EOF)){
meillo@0:     if(p >= buf_len-1) { return 0; }
meillo@0:     buf[p++] = c;
meillo@0:   }
meillo@0: 
meillo@0:   if(c == EOF){
meillo@0:     return -1;
meillo@0:   }
meillo@0:   if((p > 0) && (buf[p-1] == '\r'))
meillo@0:     p--;
meillo@0:   buf[p++] = '\n';
meillo@0:   buf[p] = 0;
meillo@0: 
meillo@0:   return p;
meillo@0: }
meillo@0: 
meillo@0: static
meillo@0: void spool_write_rcpt(FILE *out, address *rcpt)
meillo@0: {
meillo@0:   gchar dlvrd_char = addr_is_delivered(rcpt) ? 'X' : (addr_is_failed(rcpt) ? 'F' : ' ');
meillo@0: 
meillo@0:   if(rcpt->local_part[0] != '|'){
meillo@0:     /* this is a paranoid check, in case it slipped through: */
meillo@0:     /* if this happens, it is a bug */
meillo@0:     if(rcpt->domain == NULL){
meillo@0:       logwrite(LOG_WARNING, "BUG: null domain for address %s, setting to %s\n",
meillo@0: 	       rcpt->local_part, conf.host_name);
meillo@0:       logwrite(LOG_WARNING, "please report this bug.\n");
meillo@0:       rcpt->domain = g_strdup(conf.host_name);
meillo@0:     }
meillo@0:     fprintf(out, "RT:%c%s\n", dlvrd_char, addr_string(rcpt));
meillo@0:   }else{
meillo@0:     fprintf(out, "RT:%c%s\n", dlvrd_char, rcpt->local_part);
meillo@0:   }
meillo@0: }
meillo@0: 
meillo@0: static
meillo@0: address *spool_scan_rcpt(gchar *line)
meillo@0: {
meillo@0:   address *rcpt = NULL;
meillo@0: 
meillo@0:   if(line[3] != 0){
meillo@0:     if(line[4] != '|'){
meillo@0:       rcpt = create_address(&(line[4]), TRUE);
meillo@0:     }else{
meillo@0:       rcpt = create_address_pipe(&(line[4]));
meillo@0:     }
meillo@0:     if(line[3] == 'X'){
meillo@0:       addr_mark_delivered(rcpt);
meillo@0:     }else if(line[3] == 'F'){
meillo@0:       addr_mark_failed(rcpt);
meillo@0:     }
meillo@0:   }
meillo@0:   return rcpt;
meillo@0: }
meillo@0: 
meillo@0: gboolean spool_read_data(message *msg)
meillo@0: {
meillo@0:   FILE *in;
meillo@0:   gboolean ok = FALSE;
meillo@0:   gchar *spool_file;
meillo@0: 
meillo@0:   DEBUG(5) debugf("spool_read_data entered\n");
meillo@0:   spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
meillo@0:   DEBUG(5) debugf("reading data spool file '%s'\n", spool_file);
meillo@0:   if((in = fopen(spool_file, "r"))){
meillo@0:     char buf[MAX_DATALINE];
meillo@0:     int len;
meillo@0:     
meillo@0:     /* msg uid */
meillo@0:     read_line(in, buf, MAX_DATALINE);
meillo@0:       
meillo@0:     /* data */
meillo@0:     msg->data_list = NULL;
meillo@0:     while((len = read_line(in, buf, MAX_DATALINE)) > 0){
meillo@0:       msg->data_list = g_list_prepend(msg->data_list, g_strdup(buf));
meillo@0:     }
meillo@0:     msg->data_list = g_list_reverse(msg->data_list);
meillo@0:     fclose(in);
meillo@0:     ok = TRUE;
meillo@0:   }else
meillo@0:     logwrite(LOG_ALERT, "could not open spool data file %s: %s\n",
meillo@0: 	     spool_file, strerror(errno));
meillo@0:   return ok;
meillo@0: }
meillo@0: 
meillo@0: gboolean spool_read_header(message *msg)
meillo@0: {
meillo@0:   FILE *in;
meillo@0:   gboolean ok = FALSE;
meillo@0:   gchar *spool_file;
meillo@0: 
meillo@0:   /* header spool: */
meillo@0:   spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
meillo@0:   if((in = fopen(spool_file, "r"))){
meillo@0:     header *hdr = NULL;
meillo@0:     char buf[MAX_DATALINE];
meillo@0:     int len;
meillo@0: 
meillo@0:     /* msg uid */
meillo@0:     read_line(in, buf, MAX_DATALINE);
meillo@0:     
meillo@0:     /* envelope header */
meillo@0:     while((len = read_line(in, buf, MAX_DATALINE)) > 0){
meillo@0:       if(buf[0] == '\n')
meillo@0: 	break;
meillo@0:       else if(strncasecmp(buf, "MF:", 3) == 0){
meillo@0: 	msg->return_path = create_address(&(buf[3]), TRUE);
meillo@0: 	DEBUG(3) debugf("spool_read: MAIL FROM: %s",
meillo@0: 			msg->return_path->address);
meillo@0:       }else if(strncasecmp(buf, "RT:", 3) == 0){
meillo@0: 	address *addr;
meillo@0: 	addr = spool_scan_rcpt(buf);
meillo@0: 	if(!addr_is_delivered(addr) && !addr_is_failed(addr)){
meillo@0: 	  msg->rcpt_list = g_list_append(msg->rcpt_list, addr);
meillo@0: 	}else{
meillo@0: 	  msg->non_rcpt_list = g_list_append(msg->non_rcpt_list, addr);
meillo@0: 	}
meillo@0:       }else if(strncasecmp(buf, "PR:", 3) == 0){
meillo@0: 	prot_id i;
meillo@0: 	for(i = 0; i < PROT_NUM; i++){
meillo@0: 	  if(strncasecmp(prot_names[i], &(buf[3]),
meillo@0: 			 strlen(prot_names[i])) == 0){
meillo@0: 	    break;
meillo@0: 	  }
meillo@0: 	}
meillo@0: 	msg->received_prot = i;
meillo@0:       }else if(strncasecmp(buf, "RH:", 3) == 0){
meillo@0: 	g_strchomp(buf);
meillo@0: 	msg->received_host = g_strdup(&(buf[3]));
meillo@0:       }else if(strncasecmp(buf, "ID:", 3) == 0){
meillo@0: 	g_strchomp(buf);
meillo@0: 	msg->ident = g_strdup(&(buf[3]));
meillo@0:       }else if(strncasecmp(buf, "DS:", 3) == 0){
meillo@0: 	msg->data_size = atoi(&(buf[3]));
meillo@0:       }else if(strncasecmp(buf, "TR:", 3) == 0){
meillo@0: 	msg->received_time = (time_t)(atoi(&(buf[3])));
meillo@0:       }else if(strncasecmp(buf, "TW:", 3) == 0){
meillo@0: 	msg->warned_time = (time_t)(atoi(&(buf[3])));
meillo@0:       }
meillo@0:       /* so far ignore other tags */
meillo@0:     }
meillo@0:     
meillo@0:     /* mail headers */
meillo@0:     while((len = read_line(in, buf, MAX_DATALINE)) > 0){
meillo@0:       if(strncasecmp(buf, "HD:", 3) == 0){
meillo@0: 	hdr = get_header(&(buf[3]));
meillo@0: 	msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@0:       }else if((buf[0] == ' ' || buf[0] == '\t') && hdr){
meillo@0: 	char *tmp = hdr->header;
meillo@0: 	/* header continuation */
meillo@0: 	hdr->header = g_strconcat(hdr->header, buf, NULL);
meillo@0: 	hdr->value = hdr->header + (hdr->value - tmp);
meillo@0:       }else
meillo@0: 	break;
meillo@0:     }
meillo@0:     fclose(in);
meillo@0:     ok = TRUE;
meillo@0:   }else
meillo@0:     logwrite(LOG_ALERT, "could not open spool header file %s: %s\n",
meillo@0: 	     spool_file, strerror(errno));
meillo@0:   return ok;
meillo@0: }
meillo@0: 
meillo@0: message *msg_spool_read(gchar *uid, gboolean do_readdata)
meillo@0: {
meillo@0:   message *msg;
meillo@0:   gboolean ok = FALSE;
meillo@0:   
meillo@0:   msg = create_message();
meillo@0:   msg->uid = g_strdup(uid);
meillo@0: 
meillo@0:   /* header spool: */
meillo@0:   ok = spool_read_header(msg);
meillo@0:   if(ok && do_readdata){
meillo@0:     /* data spool: */
meillo@0:     ok = spool_read_data(msg);
meillo@0:   }
meillo@0:   return msg;
meillo@0: }
meillo@0: 
meillo@0: /* write header. uid and gid should already be set to the
meillo@0:    mail ids. Better call spool_write(msg, FALSE).
meillo@0: */
meillo@0: static
meillo@0: gboolean spool_write_header(message *msg)
meillo@0: {
meillo@0:   GList *node;
meillo@0:   gchar *spool_file, *tmp_file;
meillo@0:   FILE *out;
meillo@0:   gboolean ok = TRUE;
meillo@0: 
meillo@0:   /* header spool: */
meillo@0:   tmp_file = g_strdup_printf("%s/input/%d-H.tmp", conf.spool_dir, getpid());
meillo@0:   DEBUG(4) debugf("tmp_file = %s\n", tmp_file);
meillo@0: 
meillo@0:   if((out = fopen(tmp_file, "w"))){
meillo@0:     DEBUG(6) debugf("opened tmp_file %s\n", tmp_file);
meillo@0: 
meillo@0:     fprintf(out, "%s\n", msg->uid);
meillo@0:     fprintf(out, "MF:%s\n", addr_string(msg->return_path));
meillo@0: 
meillo@0:     DEBUG(6) debugf("after MF\n");
meillo@0:     foreach(msg->rcpt_list, node){
meillo@0:       address *rcpt = (address *)(node->data);
meillo@0:       spool_write_rcpt(out, rcpt);
meillo@0:     }
meillo@0:     foreach(msg->non_rcpt_list, node){
meillo@0:       address *rcpt = (address *)(node->data);
meillo@0:       spool_write_rcpt(out, rcpt);
meillo@0:     }
meillo@0:     DEBUG(6) debugf("after RT\n");
meillo@0:     fprintf(out, "PR:%s\n", prot_names[msg->received_prot]);
meillo@0:     if(msg->received_host != NULL)
meillo@0:       fprintf(out, "RH:%s\n", msg->received_host);
meillo@0: 
meillo@0:     if(msg->ident != NULL)
meillo@0:       fprintf(out, "ID:%s\n", msg->ident);
meillo@0: 
meillo@0:     if(msg->data_size >= 0)
meillo@0:       fprintf(out, "DS: %d\n", msg->data_size);
meillo@0: 
meillo@0:     if(msg->received_time > 0)
meillo@0:       fprintf(out, "TR: %u\n", (int)(msg->received_time));
meillo@0: 
meillo@0:     if(msg->warned_time > 0)
meillo@0:       fprintf(out, "TW: %u\n", (int)(msg->warned_time));
meillo@0: 
meillo@0:     DEBUG(6) debugf("after RH\n");
meillo@0:     fprintf(out, "\n");
meillo@0: 
meillo@0:     foreach(msg->hdr_list, node){
meillo@0:       header *hdr = (header *)(node->data);
meillo@0:       fprintf(out, "HD:%s", hdr->header);
meillo@0:     }
meillo@0:     if(fflush(out) == EOF) ok = FALSE;
meillo@0:     else if(fdatasync(fileno(out)) != 0){
meillo@0:       if(errno != EINVAL) /* some fs do not support this..
meillo@0: 			     I hope this also means that it is not necessary */
meillo@0: 	ok = FALSE;
meillo@0:     }
meillo@0:     fclose(out);
meillo@0:     if(ok){
meillo@0:       spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
meillo@0:       DEBUG(4) debugf("spool_file = %s\n", spool_file);
meillo@0:       ok = (rename(tmp_file, spool_file) != -1);
meillo@0:       g_free(spool_file);
meillo@0:     }
meillo@0:   }else{
meillo@0:     logwrite(LOG_ALERT, "could not open temporary header spool file '%s': %s\n", tmp_file, strerror(errno));
meillo@0:     DEBUG(1) debugf("euid = %d, egid = %d\n", geteuid(), getegid());
meillo@0:     ok = FALSE;
meillo@0:   }
meillo@0: 
meillo@0:   g_free(tmp_file);
meillo@0: 
meillo@0:   return ok;
meillo@0: }
meillo@0: 
meillo@0: gboolean spool_write(message *msg, gboolean do_write_data)
meillo@0: {
meillo@0:   GList *list;
meillo@0:   gchar *spool_file, *tmp_file;
meillo@0:   FILE *out;
meillo@0:   gboolean ok = TRUE;
meillo@0:   uid_t saved_uid, saved_gid;
meillo@0:   /* user can read/write, group can read, others cannot do anything: */
meillo@0:   mode_t saved_mode = saved_mode = umask(026);
meillo@0: 
meillo@0:   /* set uid and gid to the mail ids */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@0:   }
meillo@0: 
meillo@0:   /* header spool: */
meillo@0:   ok = spool_write_header(msg);
meillo@0: 
meillo@0:   if(ok){
meillo@0: 
meillo@0:     if(do_write_data){
meillo@0:       /* data spool: */
meillo@0:       tmp_file = g_strdup_printf("%s/input/%d-D.tmp",
meillo@0: 				 conf.spool_dir, getpid());
meillo@0:       DEBUG(4) debugf("tmp_file = %s\n", tmp_file);
meillo@0: 
meillo@0:       if((out = fopen(tmp_file, "w"))){
meillo@0: 	fprintf(out, "%s\n", msg->uid);
meillo@0: 	for(list = g_list_first(msg->data_list);
meillo@0: 	    list != NULL;
meillo@0: 	    list = g_list_next(list)){
meillo@0: 	  fprintf(out, "%s", (gchar *)(list->data));
meillo@0: 	}
meillo@0: 
meillo@0: 	/* possibly paranoid ;-) */
meillo@0: 	if(fflush(out) == EOF) ok = FALSE;
meillo@0: 	else if(fdatasync(fileno(out)) != 0){
meillo@0: 	  if(errno != EINVAL) /* some fs do not support this..
meillo@0: 				 I hope this also means that it is not necessary */
meillo@0: 	    ok = FALSE;
meillo@0: 	}
meillo@0: 	fclose(out);
meillo@0: 	if(ok){
meillo@0: 	  spool_file = g_strdup_printf("%s/input/%s-D",
meillo@0: 				       conf.spool_dir, msg->uid);
meillo@0: 	  DEBUG(4) debugf("spool_file = %s\n", spool_file);
meillo@0: 	  ok = (rename(tmp_file, spool_file) != -1);
meillo@0: 	  g_free(spool_file);
meillo@0: 	}
meillo@0:       }else{
meillo@0: 	logwrite(LOG_ALERT, "could not open temporary data spool file: %s\n",
meillo@0: 		 strerror(errno));
meillo@0: 	ok = FALSE;
meillo@0:       }
meillo@0:       g_free(tmp_file);
meillo@0:     }
meillo@0:   }
meillo@0: 
meillo@0:   /* set uid and gid back */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@0:   }
meillo@0: 
meillo@0:   umask(saved_mode);
meillo@0: 
meillo@0:   return ok;
meillo@0: }
meillo@0: 
meillo@0: #define MAX_LOCKAGE 300
meillo@0: 
meillo@0: gboolean spool_lock(gchar *uid)
meillo@0: {
meillo@0:   uid_t saved_uid, saved_gid;
meillo@0:   gchar *hitch_name;
meillo@0:   gchar *lock_name;
meillo@0:   gboolean ok = FALSE;
meillo@0: 
meillo@0:   hitch_name = g_strdup_printf("%s/%s-%d.lock", conf.lock_dir, uid, getpid());
meillo@0:   lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);
meillo@0: 
meillo@0:   /* set uid and gid to the mail ids */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@0:   }
meillo@0: 
meillo@0:   ok = dot_lock(lock_name, hitch_name);
meillo@0:   if(!ok) logwrite(LOG_WARNING, "spool file %s is locked\n", uid);
meillo@0: 
meillo@0:   /* set uid and gid back */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@0:   }
meillo@0: 
meillo@0:   g_free(lock_name);
meillo@0:   g_free(hitch_name);
meillo@0: 
meillo@0:   return ok;
meillo@0: }
meillo@0: 
meillo@0: gboolean spool_unlock(gchar *uid)
meillo@0: {
meillo@0:   uid_t saved_uid, saved_gid;
meillo@0:   gchar *lock_name;
meillo@0: 
meillo@0:   /* set uid and gid to the mail ids */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@0:   }
meillo@0: 
meillo@0:   lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);
meillo@0:   dot_unlock(lock_name);
meillo@0:   g_free(lock_name);
meillo@0: 
meillo@0:   /* set uid and gid back */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@0:   }
meillo@0:   return TRUE;
meillo@0: }
meillo@0: 
meillo@0: gboolean spool_delete_all(message *msg)
meillo@0: {
meillo@0:   uid_t saved_uid, saved_gid;
meillo@0:   gchar *spool_file;
meillo@0: 
meillo@0:   /* set uid and gid to the mail ids */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@0:   }
meillo@0: 
meillo@0:   /* header spool: */
meillo@0:   spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
meillo@0:   if(unlink(spool_file) != 0)
meillo@0:     logwrite(LOG_ALERT, "could not delete spool file %s: %s\n",
meillo@0: 	     spool_file, strerror(errno));
meillo@0:   g_free(spool_file);
meillo@0: 
meillo@0:   /* data spool: */
meillo@0:   spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
meillo@0:   if(unlink(spool_file) != 0)
meillo@0:     logwrite(LOG_ALERT, "could not delete spool file %s: %s\n",
meillo@0: 	     spool_file, strerror(errno));
meillo@0:   g_free(spool_file);
meillo@0: 
meillo@0:   /* set uid and gid back */
meillo@0:   if(!conf.run_as_user){
meillo@0:     set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@0:   }
meillo@0:   return TRUE;
meillo@0: }