X-Git-Url: https://git.ucc.asn.au/?p=tpg%2Facess2.git;a=blobdiff_plain;f=Usermode%2FLibraries%2Flibposix.so_src%2Funistd.c;fp=Usermode%2FLibraries%2Flibposix.so_src%2Funistd.c;h=dca29630e7e2f5b5e7a60175e681cd77df76e6df;hp=3af7bcbc34f15cf7f54e38051a5f3112c3a83c4a;hb=845b6f9d90bb87b5e760e4d49aa93b0e003ab750;hpb=67a7fe2bb79eceaf10c572a99bd8345c4e81cf5b

diff --git a/Usermode/Libraries/libposix.so_src/unistd.c b/Usermode/Libraries/libposix.so_src/unistd.c
index 3af7bcbc..dca29630 100644
--- a/Usermode/Libraries/libposix.so_src/unistd.c
+++ b/Usermode/Libraries/libposix.so_src/unistd.c
@@ -292,3 +292,21 @@ int ttyname_r(int fd, char *buf, size_t buflen)
 
 	return ENOTIMPL;
 }
+
+int isatty(int fd)
+{
+	if( fd < 0 ) {
+		errno = EBADF;
+		return 0;
+	}
+	
+	 int	type = _SysIOCtl(fd, DRV_IOCTL_TYPE, NULL);
+	if( type == -1 )
+		return 0;
+	if( type != DRV_TYPE_TERMINAL ) {
+		errno = ENOTTY;
+		// NOTE: Pre POSIX 2001, EINVAL was returned
+		return 0;
+	}
+	return 1;
+}