libmount: add mnt_tab_set_parser_errcb()

Signed-off-by: Karel Zak <kzak@redhat.com>

4 files changed, 35 insertions, 11 deletions

diff --git a/shlibs/mount/src/mount.h.in b/shlibs/mount/src/mount.h.in
index cd9159cca..b1d660747 100644
--- a/shlibs/mount/src/mount.h.in
+++ b/shlibs/mount/src/mount.h.in
@@ -266,7 +266,8 @@ extern int mnt_fs_print_debug(mnt_fs *ent, FILE *file);
 /* tab-parse.c */
 extern mnt_tab *mnt_new_tab_from_file(const char *filename);
 extern int mnt_tab_parse_file(mnt_tab *tb);
-extern char *mnt_tab_strerror(mnt_tab *tb, char *buf, size_t buflen);
+extern int mnt_tab_set_parser_errcb(mnt_tab *tb,
+                int (*cb)(mnt_tab *tb, const char *filename, int line, int flag));
 extern int mnt_tab_get_nerrs(mnt_tab *tb);
 
 /* tab.c */
diff --git a/shlibs/mount/src/mount.sym b/shlibs/mount/src/mount.sym
index 819be0f1d..f6035e4ba 100644
--- a/shlibs/mount/src/mount.sym
+++ b/shlibs/mount/src/mount.sym
@@ -124,6 +124,7 @@ global:
 	mnt_tab_parse_file;
 	mnt_tab_remove_fs;
 	mnt_tab_set_cache;
+	mnt_tab_set_parser_errcb;
 	mnt_tab_set_iter;
 	mnt_tab_strerror;
 	mnt_tab_update_file;
diff --git a/shlibs/mount/src/mountP.h b/shlibs/mount/src/mountP.h
index 4a99bb4e6..63997544b 100644
--- a/shlibs/mount/src/mountP.h
+++ b/shlibs/mount/src/mountP.h
@@ -175,6 +175,9 @@ struct _mnt_tab {
 
 	mnt_cache	*cache;		/* canonicalized paths/tags cache */
 
+        int		(*errcb)(mnt_tab *tb, const char *filename,
+						int line, int flag);
+
 	struct list_head	ents;	/* list of entries (mentry) */
 };
 
diff --git a/shlibs/mount/src/tab_parse.c b/shlibs/mount/src/tab_parse.c
index 680e1fc18..0c4059daa 100644
--- a/shlibs/mount/src/tab_parse.c
+++ b/shlibs/mount/src/tab_parse.c
@@ -354,6 +354,9 @@ static int mnt_tab_parse_next(mnt_tab *tb, FILE *f, mnt_fs *fs)
 
 	return 0;
 err:
+	if (tb->errcb)
+		return tb->errcb(tb, NULL, tb->nlines, 0);
+
 	/* we don't report parse errors to caller; caller has to check
 	 * errors by mnt_tab_get_nerrs() or internaly by MNT_ENTRY_ERR flag
 	 */
@@ -374,22 +377,19 @@ err:
  *	int rc;
  *
  *	rc = mnt_tab_parse_file(tb);
- *	if (rc) {
- *		if (mnt_tab_get_nerrs(tb)) {             / * parse error * /
- *			mnt_tab_strerror(tb, buf, sizeof(buf));
- *			fprintf(stderr, "%s: %s\n", progname, buf);
- *		} else
- *			perror(mnt_tab_get_name(tb));  / * system error * /
- *	} else
+ *	if (rc)
+ *		perror(mnt_tab_get_name(tb));  / * system error * /
+ *	else
  *		mnt_fprintf_tab(tb, stdout, NULL);
  *
  *	mnt_free_tab(tb);
  *   </programlisting>
  * </informalexample>
  *
- * Returns: 0 on success and -1 in case of error. The parse errors is possible
- * to detect by mnt_tab_get_nerrs() and error message is possible to create by
- * mnt_tab_strerror().
+ * The libmount parser ignores broken (with syntax error) lines, these lines are
+ * reported to caller by errcb() function (see mnt_tab_set_parser_errcb()).
+ *
+ * Returns: 0 on success, -1 in case of error.
  */
 int mnt_tab_parse_file(mnt_tab *tb)
 {
@@ -458,6 +458,25 @@ mnt_tab *mnt_new_tab_from_file(const char *filename)
 }
 
 /**
+ * mnt_tab_set_parser_errcb:
+ * @tab: pointer to table
+ * @cb: pointer to callback function
+ *
+ * The error callback function is called by table parser (mnt_tab_parse_file())
+ * in case of sytax error. If the callback function does not return zero then
+ * parsing is aborted.
+ *
+ * Returns: 0 on success or -1 in case of error.
+ */
+int mnt_tab_set_parser_errcb(mnt_tab *tb,
+		int (*cb)(mnt_tab *tb, const char *filename, int line, int flag))
+{
+	assert(tb);
+	tb->errcb = cb;
+	return 0;
+}
+
+/**
  * mnt_tab_get_nerrs:
  * @tb: pointer to table
  *