syslog: Implement checked syslog functions from LSB

Signed-off-by: Samuel Holland <samuel@sholland.org>

2 files changed, 33 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 98f87ad..dbea5b6 100644
--- a/Makefile
+++ b/Makefile
@@ -21,6 +21,7 @@ LIBGCOMPAT_SRC = \
 	libgcompat/stdlib.c		\
 	libgcompat/string.c		\
 	libgcompat/sysctl.c		\
+	libgcompat/syslog.c		\
 	libgcompat/ucontext.c		\
 	libgcompat/version.c		\
 	libgcompat/wchar.c
diff --git a/libgcompat/syslog.c b/libgcompat/syslog.c
new file mode 100644
index 0000000..5409eba
--- /dev/null
+++ b/libgcompat/syslog.c
@@ -0,0 +1,32 @@
+#include <assert.h> /* assert */
+#include <stdarg.h> /* va_list, va_start, va_end */
+#include <stddef.h> /* NULL */
+#include <syslog.h> /* vsyslog */
+
+void __vsyslog_chk(int priority, int flag, const char *format, va_list ap);
+
+/**
+ * Log a message, with stack checking.
+ *
+ * LSB 5.0: LSB-Core-generic/baselib---syslog-chk-1.html
+ */
+void __syslog_chk(int priority, int flag, const char *format, ...)
+{
+	va_list ap;
+
+	va_start(ap, format);
+	__vsyslog_chk(priority, flag, format, ap);
+	va_end(ap);
+}
+
+/**
+ * Log a message, with stack checking.
+ *
+ * LSB 5.0: LSB-Core-generic/baselib---vsyslog-chk-1.html
+ */
+void __vsyslog_chk(int priority, int flag, const char *format, va_list ap)
+{
+	assert(format != NULL);
+
+	vsyslog(priority, format, ap);
+}