[PATCH] udev - safer sprintf() use

Here is for now my last patch to the string handling for a rather
theorethical case, where the node is very very very long. :)

We have accordant to strfieldcat(to, from) now a strintcat(to, i) macro,
which appends the ascii representation of a integer to a string in a
safe way.

1 files changed, 12 insertions, 0 deletions

diff --git a/udev.h b/udev.h
index 3b676acf40..5737c84c9d 100644
--- a/udev.h
+++ b/udev.h
@@ -85,6 +85,18 @@ do { \
 	strncat(to, from, maxsize - strlen(to)-1); \
 } while (0)
 
+#define strintcat(to, i) \
+do { \
+	to[sizeof(to)-1] = '\0'; \
+	snprintf((to) + strlen(to), sizeof(to) - strlen(to)-1, "%u", i); \
+} while (0)
+
+#define strnintcat(to, i, maxsize) \
+do { \
+	to[maxsize-1] = '\0'; \
+	snprintf((to) + strlen(to), maxsize - strlen(to)-1, "%u", i); \
+} while (0)
+
 static inline char *get_action(void)
 {
 	char *action;