From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sat, 12 Feb 2011 00:22:29 -0500
Subject: initial check-in, version 0.5.0

---
 src/unistd/ctermid.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/unistd/ctermid.c

(limited to 'src/unistd/ctermid.c')

diff --git a/src/unistd/ctermid.c b/src/unistd/ctermid.c
new file mode 100644
index 00000000..21b44ec8
--- /dev/null
+++ b/src/unistd/ctermid.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+
+char *ctermid(char *s)
+{
+	static char *s2;
+	int fd;
+	if (!s) {
+		if (!s2) s2 = malloc(L_ctermid);
+		s = s2;
+	}
+	fd = open("/dev/tty", O_WRONLY | O_NOCTTY);
+	if (fd < 0)
+		return strcpy(s, "");
+	if (ttyname_r(fd, s, L_ctermid))
+		strcpy(s, "");
+	close(fd);
+	return s;
+}
-- 
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