1 files changed, 73 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/ttyname.c b/cpukit/libcsupport/src/ttyname.c
new file mode 100644
index 0000000000..51b3a5f6aa
--- /dev/null
+++ b/cpukit/libcsupport/src/ttyname.c
@@ -0,0 +1,73 @@
+/*
+ *  ttyname_r() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name
+ *
+ *  $Id$
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <termios.h>
+#include <unistd.h>
+#include <paths.h>
+#include <_syslist.h>
+#include <errno.h>
+
+#include <rtems/posix/seterr.h>
+
+int ttyname_r(
+  int   fd,
+  char *name,
+  int   namesize
+)
+{
+  struct stat sb;
+  struct termios tty;
+  struct dirent *dirp;
+  DIR *dp;
+  struct stat dsb;
+  char *rval;
+
+  /* Must be a terminal. */
+  if (tcgetattr (fd, &tty) < 0)
+    set_errno_and_return_minus_one(EBADF);
+
+  /* Must be a character device. */
+  if (_fstat (fd, &sb) || !S_ISCHR (sb.st_mode))
+    set_errno_and_return_minus_one(EBADF);
+
+  if ((dp = opendir (_PATH_DEV)) == NULL)
+    set_errno_and_return_minus_one(EBADF);
+
+  for (rval = NULL; (dirp = readdir (dp)) != NULL ;)
+    {
+      if (dirp->d_ino != sb.st_ino)
+	continue;
+      strcpy (name + sizeof (_PATH_DEV) - 1, dirp->d_name);
+      if (stat (name, &dsb) || sb.st_dev != dsb.st_dev ||
+	  sb.st_ino != dsb.st_ino)
+	continue;
+      (void) closedir (dp);
+      rval = name;
+      break;
+    }
+  (void) closedir (dp);
+  return 0;
+}
+
+static char buf[sizeof (_PATH_DEV) + MAXNAMLEN] = _PATH_DEV;
+
+/*
+ *  ttyname() - POSIX 1003.1b 4.7.2 - Demetermine Terminal Device Name
+ */
+
+char *ttyname(
+  int fd
+)
+{
+  if ( !ttyname_r( fd, buf, sizeof(buf) ) )
+    return buf;
+  return NULL;
+}
+