ndk_patches: ttyname(_r) works in Android 5.0+

ndk_patches/unistd.patch

@@ -1,55 +0,0 @@
-diff -u -r /home/fornwall/lib/android-ndk/platforms/android-19/arch-arm/usr/include/unistd.h ./usr/include/unistd.h
---- /home/fornwall/lib/android-ndk/platforms/android-19/arch-arm/usr/include/unistd.h	2012-08-21 07:23:12.000000000 +0200
-+++ ./usr/include/unistd.h	2014-07-09 09:55:58.443639544 +0200
-@@ -35,6 +35,7 @@
- #include <sys/sysconf.h>
- #include <linux/capability.h>
- #include <pathconf.h>
-+#include <asm/unistd.h>
- 
- __BEGIN_DECLS
- 
-@@ -166,6 +174,43 @@
- extern char* ttyname(int);
- extern int ttyname_r(int, char*, size_t);
- 
-+/* start android polyfill of ttyname(3) and ttyname_r(3) */
-+#define ttyname(a) android_polyfill_ttyname(a)
-+#define ttyname_r(a, b, c) android_polyfill_ttyname_r(a, b, c)
-+
-+static int android_polyfill_ttyname_r(int fd, char* buf, size_t buflen)
-+{
-+	char symlink_path[32] = "/proc/self/fd/";
-+	ssize_t siz;
-+
-+	if (!isatty(fd)) return -1;
-+
-+	/* Would like to do sprintf(symlink_path, "/proc/self/fd/%d", fd), but stdio.h may not be included. */
-+	int shifter = fd;
-+	char* p = symlink_path + 14;
-+	do {
-+		p++;
-+		shifter = shifter / 10;
-+	} while(shifter);
-+	*p = '\0';
-+	do {
-+		*--p = (fd % 10) + '0';
-+		fd = fd / 10;
-+	} while (fd);
-+
-+	siz = readlink(symlink_path, buf, buflen);
-+	if (siz < 0 || siz == buflen) return -1;
-+	buf[siz] = '\0';
-+	return 0;
-+}
-+
-+static char* android_polyfill_ttyname(int fd)
-+{
-+	static char buf[32];
-+	return (ttyname_r(fd, buf, sizeof(buf)) == 0) ? buf : NULL;
-+}
-+/* end android polyfill of ttyname(3) and ttyname_r(3) */
-+
- extern int  acct(const char*  filepath);
- 
- static __inline__ int getpagesize(void) {