utils: implement xsnprintf function

Check the return value of (v)snprintf

1 files changed, 17 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
index c00c3f9..7a762f7 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -1,4 +1,5 @@
 #include "utils.h"
+#include "err.h"
 #include "fm.h"
 #include "log.h"
 #include <limits.h>
@@ -61,3 +62,19 @@ y_or_n(const char *prompt)
 
 	return ch == 'y';
 }
+
+int
+xsnprintf(char *str, size_t size, const char *restrict format, ...)
+{
+	va_list ap;
+	va_start(ap, format);
+
+	size_t len = vsnprintf(str, size, format, ap);
+	if (len >= size) {
+		die("Length of items error");
+	}
+
+	va_end(ap);
+
+	return SF_OK;
+}