merge XOPEN identifiers

1 files changed, 30 insertions, 0 deletions

diff --git a/src/unistd/cuserid.c b/src/unistd/cuserid.c
new file mode 100644
index 00000000..1fa65dbe
--- /dev/null
+++ b/src/unistd/cuserid.c
@@ -0,0 +1,30 @@
+#include "stddef.h"
+#include "sys/types.h"
+#include <unistd.h>
+#include "stdio.h"
+#include "string.h"
+#include "pwd.h"
+
+char *cuserid(char *s)
+{
+	static char userid[L_cuserid];
+
+	struct passwd *pwd = getpwuid(geteuid());
+
+	if (s == NULL) {
+		s = userid;
+	}
+
+	if (pwd == NULL) {
+		s[0] = '\0';
+	} else {
+		strcpy(s, pwd->pw_name);
+	}
+	
+	return s;
+}
+
+/*
+TODO: verify
+POSIX(1, 199506)
+*/