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-rw-r--r--libbb/libbb.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/libbb/libbb.h b/libbb/libbb.h
index a85987d9e..4c23b2b80 100644
--- a/libbb/libbb.h
+++ b/libbb/libbb.h
@@ -68,11 +68,15 @@ static inline int is_octal(ch) { return ((ch >= '0') && (ch <= '7')); }
extern void show_usage(void) __attribute__ ((noreturn));
-extern void error_msg(const char *s, ...);
-extern void error_msg_and_die(const char *s, ...) __attribute__ ((noreturn));
+extern void error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2)));
+extern void error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2)));
extern void perror_msg(const char *s, ...);
extern void perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn));
+/* These two are used internally -- you shouldn't need to use them */
+extern void verror_msg(const char *s, va_list p);
+extern void vperror_msg(const char *s, va_list p);
+
const char *mode_string(int mode);
const char *time_string(time_t timeVal);
int is_directory(const char *name, const int followLinks, struct stat *statBuf);