Added support for strftime(3) formatting in the append_filename

configuration so allow archived messages to be split over multiple
mailboxes (monthly or yearly for example)

Author: oz-djh

docs/hmrc.html

@@ -1301,9 +1301,7 @@ <h3><a name="sysmisc" id="sysmisc">System miscellaneous</a></h3>
 <i>append = 1</i></dd>
 <dd><a name="append_filename" id="append_filename"></a></dd>
 <dt><strong>append_filename = [ string ]</strong></dt>
-<dd>Specifies the filename to be used by the append option. $DIR
-may be used to specify a name relative to the directory specified
-in the -d or dir option.<br>
+<dd>Specifies the filename to be used by the append option. $DIR may be used to specify a name relative to the directory specified in the -d or dir option.  The string will be passed to strftime(3) to allow splitting the mailbox into yearly or monthy files, such as "%Y-%m.mbox". <br>
 <br>
 <i>append_filename = $DIR/INBOX</i></dd>
 <dd><a name="txtsuffix" id="txtsuffix"></a></dd>

src/Makefile.in

@@ -40,7 +40,7 @@ CPPFLAGS=@CPPFLAGS@ @INCLUDES@
 YACC=@YACC@
 NETLIBS=@LIBS@
 LDFLAGS=@LDFLAGS@
-MISC_LIBS= -lm -lpcre -ltrio
+MISC_LIBS= -lpcre -ltrio -lm
 OPT_LIBS=@EXTRA_LIBS@
 
 INCS=		domains.h hypermail.h lang.h proto.h \

src/parse.c

@@ -1531,6 +1531,7 @@ int parsemail(char *mbox,	/* file name */
     int num, isinheader, hassubject, hasdate;
     int num_added = 0;
     long exp_time = -1;
+    time_t curtime;
     time_t delete_older_than = (set_delete_older ? convtoyearsecs(set_delete_older) : 0);
     time_t delete_newer_than = (set_delete_newer ? convtoyearsecs(set_delete_newer) : 0);
     annotation_robot_t annotation_robot = ANNOTATION_ROBOT_NONE;
@@ -1541,6 +1542,8 @@ int parsemail(char *mbox,	/* file name */
     int require_filter_len, require_filter_full_len;
     struct hmlist *tlist;
     char filename[MAXFILELEN];
+    char directory[MAXFILELEN];
+    char pathname[MAXFILELEN];
     struct emailinfo *emp;
     char *att_dir = NULL;	/* directory name to store attachments in */
     char *meta_dir = NULL;	/* directory name where we're storing the meta data
@@ -1655,21 +1658,31 @@ int parsemail(char *mbox,	/* file name */
     if(set_append) {
 
 	/* add to an mbox as we read */
-
-	if(set_append_filename && strncmp(set_append_filename, "$DIR/", 5)) {
-	    if(strlen(set_append_filename) >= sizeof(filename))
-	        progerr("append_filename too long");
-	    strcpy(filename, set_append_filename);
+	*directory = 0;
+	*filename = 0;
+	*pathname = 0;
+	if (set_append_filename) {
+	    time(&curtime);
+	    if(strncmp(set_append_filename, "$DIR/", 5) == 0) {
+	        strncpy(directory, dir, MAXFILELEN - 1);
+                strftime(filename, MAXFILELEN - 1, set_append_filename+5, 
+			    localtime(&curtime));
+            } else {
+                strftime(filename, MAXFILELEN - 1, set_append_filename, 
+			    localtime(&curtime));
+	    }
+	} else {
+	    strncpy(directory, dir, MAXFILELEN - 1);
+	    strncpy(filename, "mbox", MAXFILELEN - 1);
 	}
-	else if(trio_snprintf(filename, sizeof(filename), "%s%s", dir,
-			      set_append_filename ? set_append_filename + 5
-			      : "mbox") 
-	   == sizeof(filename)) {
+
+	if(trio_snprintf(pathname, sizeof(pathname), "%s%s", directory,
+			filename) == sizeof(pathname)) {
 	    progerr("Can't build mbox filename");
 	}
-	if(!(fpo = fopen(filename, "a"))) {
+	if(!(fpo = fopen(pathname, "a"))) {
 	    trio_snprintf(errmsg, sizeof(errmsg), "%s \"%s\".",
-			  lang[MSG_CANNOT_OPEN_MAIL_ARCHIVE], filename);
+			  lang[MSG_CANNOT_OPEN_MAIL_ARCHIVE], pathname);
 	    progerr(errmsg);
 	}
     }

src/setup.c

@@ -412,7 +412,9 @@ struct Config cfg[] = {
     {"append_filename", &set_append_filename, NULL, CFG_STRING,
      "# Specifies the filename to be used by the append option.\n"
      "# $DIR may be used to specify a name relative to the directory\n"
-     "# specified in the -d or dir option.\n", FALSE},
+     "# specified in the -d or dir option.\n"
+     "# The string will be passed to strftime(3) to allow splitting the\n"
+     "# mailbox into yearly or monthy files, such as \"%Y-%m.mbox\".\n" , FALSE},
 
     {"nonsequential",  &set_nonsequential,  BFALSE,    CFG_SWITCH,
      "# Set this to On to generate filenames that are not sequential, but\n"