utmp: Implement the reentrant utmp function from LSB

This takes advantage of the (lack of a) musl implementation for
simplicity.

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

1 files changed, 14 insertions, 0 deletions

diff --git a/libgcompat/utmp.c b/libgcompat/utmp.c
new file mode 100644
index 0000000..c2bdd91
--- /dev/null
+++ b/libgcompat/utmp.c
@@ -0,0 +1,14 @@
+#include <stddef.h> /* NULL */
+#include <utmp.h>   /* struct utmp */
+
+/**
+ * Get user accounting database entries.
+ *
+ * LSB 5.0: LSB-Core-generic/baselib-getutent-r-3.html
+ */
+int getutent_r(struct utmp *buffer, struct utmp **result)
+{
+	/* musl does not implement getutent(). */
+	*result = NULL;
+	return -1;
+}