* refactor output a bit (mu-cmd-find)

src/mu-output-link.c

@@ -0,0 +1,88 @@
+/*
+** Copyright (C) 2010 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** This program 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 3, or (at your option) any
+** later version.
+**
+** This program 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.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software Foundation,
+** Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+**
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif /*HAVE_CONFIG_H*/
+
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "mu-msg.h"
+#include "mu-maildir.h"
+#include "mu-index.h"
+#include "mu-msg-iter.h"
+#include "mu-msg-str.h"
+
+#include "mu-util.h"
+#include "mu-output-link.h"
+
+
+/* create a linksdir if it not exist yet; if it already existed,
+ * remove old links if opts->clearlinks was specified */
+gboolean
+mu_output_link_create_dir (const char *linksdir, gboolean clearlinks)
+{
+	g_return_val_if_fail (linksdir, FALSE);
+
+	if (access (linksdir, F_OK) != 0) {
+		if (!mu_maildir_mkmdir (linksdir, 0700, TRUE)) 
+			return FALSE;
+
+	} else if (clearlinks)
+		mu_maildir_clear_links (linksdir);
+	
+	return TRUE;
+}
+
+gboolean
+mu_output_link_row (MuMsgIter *iter, const char* linksdir)
+{
+	const char *path;
+	const MuMsgField *pathfield;
+
+	g_return_val_if_fail (iter, FALSE);
+	g_return_val_if_fail (linksdir, FALSE);	
+	g_return_val_if_fail (!mu_msg_iter_is_done (iter), FALSE);
+		
+	pathfield = mu_msg_field_from_id (MU_MSG_FIELD_ID_PATH);
+				
+	path = mu_msg_iter_get_field (iter, pathfield);
+	if (!path)
+		return FALSE;
+	
+	/* this might happen  if the database is not up-to-date, not an error */
+	if (access (path, R_OK) != 0) {
+		if (errno == ENOENT)
+			g_warning ("Cannot find source message %s: "
+				   "the database is not up-to-date", pathq);
+		else
+			g_warning ("Cannot read source message %s: %s", path,
+				   strerror (errno));
+		return FALSE;
+	}
+	
+	if (!mu_maildir_link (path, linksdir))
+		return FALSE;
+		 
+	return TRUE;
+}
+