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-rw-r--r--include/path.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/path.h b/include/path.h
index 45da692f8..11c336759 100644
--- a/include/path.h
+++ b/include/path.h
@@ -27,7 +27,11 @@ extern cpu_set_t *path_read_cpuset(int, const char *path, ...)
__attribute__ ((__format__ (__printf__, 2, 3)));
extern cpu_set_t *path_read_cpulist(int, const char *path, ...)
__attribute__ ((__format__ (__printf__, 2, 3)));
-extern void path_set_prefix(const char *);
+
+/* Returns: 0 on success, sets errno on error. */
+extern int path_set_prefix(const char *)
+ __attribute__((warn_unused_result));
+
#endif /* HAVE_CPU_SET_T */
#endif /* UTIL_LINUX_PATH_H */