Do proper error checking and return -1 on fail.

2002-09-10  Jeffrey Stedfast  <fejj@ximian.com>

	* camel-folder-summary.c (perform_content_info_save): Do proper
	error checking and return -1 on fail.
	(camel_folder_summary_save): Check the return of
	perform_content_info_save and a few other output calls within the
	message_info_save loop. If any of them fail, save errno, close the
	file, and return -1. If we finish the loop without fail, fflush
	the stream and then fsync (fflush only flushes user-space buffers,
	you still need to fsync afterward to flush the data to disk). If
	either fail, treat it as an exception by saving errno, closing the
	stream, and returning -1. I suspect that this also fixes bug
	#30150 because the old code would fclose if fflush or fclose
	failed in the check after the loop (man fclose(3) states that any
	further calls using the stream (even another call to fclose) will
	have undefined behaviour no matter what the first fclose call
	returned).

	* providers/local/camel-local-summary.c
	(camel_local_summary_init): Don't malloc a private struct of 0
	size.

4 files changed, 63 insertions, 42 deletions

diff --git a/camel/ChangeLog b/camel/ChangeLog
index cf810f855..198d07193 100644
--- a/camel/ChangeLog
+++ b/camel/ChangeLog
@@ -1,5 +1,25 @@
 2002-09-10  Jeffrey Stedfast  <fejj@ximian.com>
 
+	* camel-folder-summary.c (perform_content_info_save): Do proper
+	error checking and return -1 on fail.
+	(camel_folder_summary_save): Check the return of
+	perform_content_info_save and a few other output calls within the
+	message_info_save loop. If any of them fail, save errno, close the
+	file, and return -1. If we finish the loop without fail, fflush
+	the stream and then fsync (fflush only flushes user-space buffers,
+	you still need to fsync afterward to flush the data to disk). If
+	either fail, treat it as an exception by saving errno, closing the
+	stream, and returning -1. I suspect that this also fixes bug
+	#30150 because the old code would fclose if fflush or fclose
+	failed in the check after the loop (man fclose(3) states that any
+	further calls using the stream (even another call to fclose) will
+	have undefined behaviour no matter what the first fclose call
+	returned).
+
+	* providers/local/camel-local-summary.c
+	(camel_local_summary_init): Don't malloc a private struct of 0
+	size.
+
 	* providers/imap/camel-imap-folder.c
 	(camel_imap_folder_fetch_data): Clear the exception even if we
 	failed to get the message (part) from the imap-message-cache if we
diff --git a/camel/camel-folder-summary.c b/camel/camel-folder-summary.c
index ebef730c7..3ec6c9310 100644
--- a/camel/camel-folder-summary.c
+++ b/camel/camel-folder-summary.c
@@ -602,13 +602,19 @@ perform_content_info_save(CamelFolderSummary *s, FILE *out, CamelMessageContentI
 {
 	CamelMessageContentInfo *part;
 
-	((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->content_info_save(s, out, ci);
-	camel_file_util_encode_uint32(out, my_list_size((struct _node **)&ci->childs));
+	if (((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS (s)))->content_info_save (s, out, ci) == -1)
+		return -1;
+	
+	if (camel_file_util_encode_uint32 (out, my_list_size ((struct _node **)&ci->childs)) == -1)
+		return -1;
+	
 	part = ci->childs;
 	while (part) {
-		perform_content_info_save(s, out, part);
+		if (perform_content_info_save (s, out, part) == -1)
+			return -1;
 		part = part->next;
 	}
+	
 	return 0;
 }
 
@@ -625,8 +631,7 @@ int
 camel_folder_summary_save(CamelFolderSummary *s)
 {
 	FILE *out;
-	int fd;
-	int i;
+	int fd, i;
 	guint32 count;
 	CamelMessageInfo *mi;
 	char *path;
@@ -641,7 +646,7 @@ camel_folder_summary_save(CamelFolderSummary *s)
 	if (fd == -1)
 		return -1;
 	out = fdopen(fd, "w");
-	if ( out == NULL ) {
+	if (out == NULL) {
 		i = errno;
 		unlink(path);
 		close(fd);
@@ -653,46 +658,52 @@ camel_folder_summary_save(CamelFolderSummary *s)
 
 	CAMEL_SUMMARY_LOCK(s, io_lock);
 
-	if ( ((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->summary_header_save(s, out) == -1) {
-		i = errno;
-		fclose(out);
-		CAMEL_SUMMARY_UNLOCK(s, io_lock);
-		unlink(path);
-		errno = i;
-		return -1;
-	}
-
+	if (((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->summary_header_save(s, out) == -1)
+		goto exception;
+	
 	/* now write out each message ... */
 	/* we check ferorr when done for i/o errors */
-
 	count = s->messages->len;
-	for (i=0;i<count;i++) {
+	for (i = 0; i < count; i++) {
 		mi = s->messages->pdata[i];
-		((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS(s)))->message_info_save(s, out, mi);
-
+		if (((CamelFolderSummaryClass *)(CAMEL_OBJECT_GET_CLASS (s)))->message_info_save (s, out, mi) == -1)
+			goto exception;
+		
 		if (s->build_content) {
-			perform_content_info_save(s, out, mi->content);
+			if (perform_content_info_save (s, out, mi->content) == -1)
+				goto exception;
 		}
 	}
-
+	
+	if (fflush (out) != 0 || fsync (fileno (out)) == -1)
+		goto exception;
+	
+	fclose (out);
+	
 	CAMEL_SUMMARY_UNLOCK(s, io_lock);
-
-	if (ferror(out) != 0 ||  fclose(out) != 0) {
-		i = errno;
-		unlink(path);
-		errno = i;
-		return -1;
-	}
-
+	
 	if (rename(path, s->summary_path) == -1) {
 		i = errno;
 		unlink(path);
 		errno = i;
 		return -1;
 	}
-
+	
 	s->flags &= ~CAMEL_SUMMARY_DIRTY;
 	return 0;
+	
+ exception:
+	
+	i = errno;
+	
+	fclose (out);
+	
+	CAMEL_SUMMARY_UNLOCK(s, io_lock);
+	
+	unlink (path);
+	errno = i;
+	
+	return -1;
 }
 
 /**
diff --git a/camel/providers/local/camel-local-summary.c b/camel/providers/local/camel-local-summary.c
index e1007223a..18c0b80ce 100644
--- a/camel/providers/local/camel-local-summary.c
+++ b/camel/providers/local/camel-local-summary.c
@@ -41,11 +41,6 @@
 
 #define CAMEL_LOCAL_SUMMARY_VERSION (0x200)
 
-struct _CamelLocalSummaryPrivate {
-};
-
-#define _PRIVATE(o) (((CamelLocalSummary *)(o))->priv)
-
 static CamelMessageInfo * message_info_new (CamelFolderSummary *, struct _header_raw *);
 
 static int local_summary_decode_x_evolution(CamelLocalSummary *cls, const char *xev, CamelMessageInfo *mi);
@@ -100,11 +95,8 @@ camel_local_summary_class_init(CamelLocalSummaryClass *klass)
 static void
 camel_local_summary_init(CamelLocalSummary *obj)
 {
-	struct _CamelLocalSummaryPrivate *p;
 	struct _CamelFolderSummary *s = (CamelFolderSummary *)obj;
 
-	p = _PRIVATE(obj) = g_malloc0(sizeof(*p));
-
 	/* subclasses need to set the right instance data sizes */
 	s->message_info_size = sizeof(CamelMessageInfo);
 	s->content_info_size = sizeof(CamelMessageContentInfo);
diff --git a/camel/providers/local/camel-local-summary.h b/camel/providers/local/camel-local-summary.h
index fafa99216..0995331ab 100644
--- a/camel/providers/local/camel-local-summary.h
+++ b/camel/providers/local/camel-local-summary.h
@@ -42,11 +42,9 @@ enum {
 
 struct _CamelLocalSummary {
 	CamelFolderSummary parent;
-
-	struct _CamelLocalSummaryPrivate *priv;
-
+	
 	char *folder_path;	/* name of matching folder */
-
+	
 	CamelIndex *index;
 	unsigned int index_force:1; /* do we force index during creation? */
 	unsigned int check_force:1; /* does a check force a full check? */