libselinux/man: add format attribute for set_matchpathcon_printf(3)

The parameter for set_matchpathcon_printf(3) is a function pointer that takes a format string with variable arguments. Add a GNU printf function attribute, if supported, to enable compilers checking for format string inconsistencies. Signed-off-by: Christian Göttsche <[email protected]> Acked-by: James Carter <[email protected]>
SELinuxProject · May 1, 2024 · d370cbf · d370cbf
1 parent c476389
commit d370cbf
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/libselinux/include/selinux/selinux.h b/libselinux/include/selinux/selinux.h
@@ -443,7 +443,11 @@ extern void selinux_flush_class_cache(void);
 /* Set the function used by matchpathcon_init when displaying
  errors about the file_contexts configuration. If not set,
  then this defaults to fprintf(stderr, fmt, ...). */
-extern void set_matchpathcon_printf(void (*f) (const char *fmt, ...));
+extern void set_matchpathcon_printf(void
+#ifdef __GNUC__
+ __attribute__ ((format(printf, 1, 2)))
+#endif
+ (*f) (const char *fmt, ...));
 
 /* Set the function used by matchpathcon_init when checking the
  validity of a context in the file contexts configuration. If not set,