btrfs-progs: add function attributes for the printf-like

Reported by gcc -Wsuggest-attribute=format .

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/string-table.c b/string-table.c
index fc9d51e..5eda1ac 100644 (file)
--- a/string-table.c
+++ b/string-table.c
@@ -69,6 +69,7 @@ char *table_vprintf(struct string_table *tab, int column, int row,
  * This function is like a printf, but store the results in a cell of
  * the table.
  */
+__attribute__ ((format (printf, 4, 5)))
 char *table_printf(struct string_table *tab, int column, int row,
                          char *fmt, ...)
 {

diff --git a/utils.h b/utils.h
index 493c2e4..e522a8c 100644 (file)
--- a/utils.h
+++ b/utils.h
@@ -276,6 +276,7 @@ const char *get_argv0_buf(void);
 unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode);
 int string_is_numerical(const char *str);
 
+__attribute__ ((format (printf, 1, 2)))
 static inline void warning(const char *fmt, ...)
 {
        va_list args;
@@ -287,6 +288,7 @@ static inline void warning(const char *fmt, ...)
        fputc('\n', stderr);
 }
 
+__attribute__ ((format (printf, 1, 2)))
 static inline void error(const char *fmt, ...)
 {
        va_list args;
@@ -298,6 +300,7 @@ static inline void error(const char *fmt, ...)
        fputc('\n', stderr);
 }
 
+__attribute__ ((format (printf, 2, 3)))
 static inline int warning_on(int condition, const char *fmt, ...)
 {
        va_list args;
@@ -314,6 +317,7 @@ static inline int warning_on(int condition, const char *fmt, ...)
        return 1;
 }
 
+__attribute__ ((format (printf, 2, 3)))
 static inline int error_on(int condition, const char *fmt, ...)
 {
        va_list args;