From 04d4355c3fb349d8881c4c0e7b4705b0df05c8ff Mon Sep 17 00:00:00 2001
From: Peter Simons <simons@cryp.to>
Date: Tue, 16 Jan 2001 11:33:36 +0000
Subject: [PATCH] Implemented the acked-once feature.

---
 Makefile.in  |  2 +-
 address-db.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 hermes.c     | 54 ++++++++++++++++++++++++++++++++++++
 petidomo.h   |  5 ++++
 4 files changed, 138 insertions(+), 1 deletion(-)
 create mode 100644 address-db.c

diff --git a/Makefile.in b/Makefile.in
index 1276c24..e72ceab 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -27,7 +27,7 @@ OBJS		= acl.o archive.o authen.o config.o generate_cookie.o \
 		  filter.o handleacl.o help.o hermes.o index.o io.o listserv.o \
 		  mailer.o members.o parsearray.o password.o rfcparse.o \
 		  subscribe.o tool.o unsubscribe.o main.o queue_command.o \
-	 	  queue_posting.o approve.o
+	 	  queue_posting.o approve.o address-db.o
 LIBS		= librfc822/librfc822.a libmpools/libmpools.a liblists/liblists.a libargv/libargv.a \
 		  libconfigfile/libconfigfile.a libtext/libtext.a
 
diff --git a/address-db.c b/address-db.c
new file mode 100644
index 0000000..fe73d01
--- /dev/null
+++ b/address-db.c
@@ -0,0 +1,78 @@
+/*
+   $Source$
+   $Revision$
+
+   Copyright (C) 2000 by Peter Simons <simons@computer.org>
+
+   This file is part of OpenPetidomo.
+
+   OpenPetidomo is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   OpenPetidomo is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+   General Public License for more details.
+*/
+
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include "libtext/text.h"
+#include "petidomo.h"
+
+/*
+ * rc ==  0: Address is not on list.
+ * rc == -1: Error occured while reading the file.
+ * rc ==  1: Address is on list.
+ */
+int is_address_on_list(const char* file, const char* address)
+    {
+    char *         list;
+    char *         p;
+    unsigned int   len;
+    int            rc;
+
+    list = loadfile(file);
+    if (list == NULL)
+	{
+	if (errno == ENOENT)
+	    return 0;
+	else
+	    return -1;
+	}
+
+    for (len = strlen(address), p = list; *p != '\0'; p = text_find_next_line(p))
+	{
+	if (strncasecmp(p, address, len) == 0 &&
+	    (p == list || p[-1] == '\n') &&
+	    (isspace((int)p[len]) || p[len] == '\0'))
+	    {
+	    break;
+	    }
+	}
+
+    rc = ((*p != '\0') ? 1 : 0);
+    free(list);
+    return rc;
+    }
+
+int add_address(const char* file, const char* address)
+    {
+    FILE* fh;
+    int rc = is_address_on_list(file, address);
+    if (rc != 0)
+	return rc;
+
+    fh = fopen(file, "a");
+    if (fh == NULL)
+	{
+	syslog(LOG_ERR, "Failed to open file \"%s\" for writing: %m", file);
+	return -1;
+	}
+    fprintf(fh, "%s\n", address);
+    fclose(fh);
+    return 0;
+    }
diff --git a/hermes.c b/hermes.c
index 313d1f4..d2208c4 100644
--- a/hermes.c
+++ b/hermes.c
@@ -199,6 +199,60 @@ hermes_main(char * incoming_mail, const char * listname)
 		}
 	    return 0;
 	    }
+
+	else if (ListConfig->listtype == LIST_ACKED_ONCE)
+	    {
+	    /* First posting needs an acknowledgement. */
+
+	    if (g_is_approved)
+		{
+		int rc = add_address(ListConfig->ack_file, MailStruct->From);
+		if (rc < 0)
+		    {
+		    syslog(LOG_ERR, "Can't add address to ack file.");
+		    return -1;
+		    }
+		}
+	    else
+		{
+		int rc = is_address_on_list(ListConfig->ack_file, MailStruct->From);
+		if (rc == 0)
+		    rc = is_address_on_list(ListConfig->ack_file, MailStruct->Envelope);
+		if (rc < 0)
+		    {
+		    syslog(LOG_ERR, "Can't verify whether address \"%s\" needs to be acknowledged or not.", MailStruct->From);
+		    return -1;
+		    }
+		else if (rc == 0)
+		    {
+		    char* cookie = queue_posting(MailStruct, listname);
+		    fh = vOpenMailer(owner, MailStruct->Envelope, NULL);
+		    if (fh != NULL)
+			{
+			fprintf(fh, "From: petidomo-approve@%s (Petidomo Mailing List Server)\n", ListConfig->fqdn);
+			fprintf(fh, "To: %s\n", MailStruct->Envelope);
+			fprintf(fh, "Subject: Petidomo: CONFIRM %s@%s: Your posting to list \"%s\"\n",
+				listname, ListConfig->fqdn, listname);
+			fprintf(fh, "Precedence: junk\n");
+			fprintf(fh, "Sender: %s\n", owner);
+			fprintf(fh, "\n");
+			fprintf(fh, "Your posting needs to be confirmed. Do this by replying\n");
+			fprintf(fh, "to this mail and citing the string\n");
+			fprintf(fh, "\n");
+			fprintf(fh, "    %s\n", cookie);
+			fprintf(fh, "\n");
+			fprintf(fh, "in your reply. You won't have to do that again.\n");
+			CloseMailer(fh);
+			}
+		    else
+			{
+			syslog(LOG_ERR, "Failed to send email to \"%s\" concerning this request.", owner);
+			return -1;
+			}
+		    return 0;
+		    }
+		}
+	    }
 	}
 
     /* Copy the desired headers from the original mail to our own
diff --git a/petidomo.h b/petidomo.h
index 8cc2229..cc44e06 100644
--- a/petidomo.h
+++ b/petidomo.h
@@ -251,4 +251,9 @@ char* queue_posting(const struct Mail* mail, const char* listname);
 
 char* queue_command(const struct Mail* mail, const char* command);
 
+/********** address_db.c **********/
+
+int is_address_on_list(const char* file, const char* address);
+int add_address(const char* file, const char* address);
+
 #endif /* !defined(__PETIDOMO_H__) */