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-rw-r--r--include/libssh/libssh.h9
-rw-r--r--libssh/log.c2
2 files changed, 9 insertions, 2 deletions
diff --git a/include/libssh/libssh.h b/include/libssh/libssh.h
index db524686..4fb6a306 100644
--- a/include/libssh/libssh.h
+++ b/include/libssh/libssh.h
@@ -41,6 +41,13 @@ typedef unsigned long long uint64_t;
#define LIBSSH_VERSION "libssh-0.3-svn"
+/* GCC have printf type attribute check. */
+#ifdef __GNUC__
+#define PRINTF_ATTRIBUTE(a,b) __attribute__ ((__format__ (__printf__, a, b)))
+#else
+#define PRINTF_ATTRIBUTE(a,b)
+#endif /* __GNUC__ */
+
#ifdef __cplusplus
extern "C" {
#endif
@@ -158,7 +165,7 @@ enum {
#define SSH_LOG_FUNCTIONS 4 // every function in and return
*/
/* log.c */
-void ssh_log(SSH_SESSION *session, int prioriry, char *format, ...);
+void ssh_log(SSH_SESSION *session, int prioriry, const char *format, ...) PRINTF_ATTRIBUTE(3, 4);
/* session.c */
SSH_SESSION *ssh_new(void);
diff --git a/libssh/log.c b/libssh/log.c
index fbea05d8..e4d6893e 100644
--- a/libssh/log.c
+++ b/libssh/log.c
@@ -33,7 +33,7 @@
* \param verbosity verbosity of the event
* \param format format string of the log entry
*/
-void ssh_log(SSH_SESSION *session, int verbosity, char *format, ...){
+void ssh_log(SSH_SESSION *session, int verbosity, const char *format, ...) {
char buffer[1024];
char buf2[256];
int min;