diff -u -r /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm/usr/include/stdio.h ./usr/include/stdio.h
--- /home/fornwall/lib/android-ndk/platforms/android-21/arch-arm/usr/include/stdio.h	2016-03-03 16:54:24.000000000 -0500
+++ ./usr/include/stdio.h	2016-04-11 06:54:22.893930847 -0400
@@ -52,6 +52,10 @@
 #include <stdarg.h>
 #include <stddef.h>
 
+#include <string.h>		/* For strcpy(3) used by ctermid() */
+#include <asm/fcntl.h>         /* For O_RDWR and other O_* constants */
+#include <stdlib.h>            /* For arc4random() */
+
 #define __need_NULL
 #include <stddef.h>
 
@@ -193,7 +196,7 @@
 
 /* System V/ANSI C; this is the wrong way to do this, do *not* use these. */
 #if __BSD_VISIBLE || __XPG_VISIBLE
-#define	P_tmpdir	"/tmp/"
+#define	P_tmpdir	"@TERMUX_PREFIX@/tmp/"
 #endif
 #define	L_tmpnam	1024	/* XXX must be == PATH_MAX */
 #define	TMP_MAX		308915776
@@ -257,7 +260,6 @@
 int	 setvbuf(FILE * __restrict, char * __restrict, int, size_t);
 int	 sscanf(const char * __restrict, const char * __restrict, ...)
 		__scanflike(2, 3);
-FILE	*tmpfile(void);
 int	 ungetc(int, FILE *);
 int	 vfprintf(FILE * __restrict, const char * __restrict, __va_list)
 		__printflike(2, 0);
@@ -371,6 +373,16 @@
 #define	fwopen(cookie, fn) funopen(cookie, 0, fn, 0, 0)
 #endif /* __BSD_VISIBLE */
 
+/* Needed by gnulibs freading() */
+#define __sferror(p)    (((p)->_flags & __SERR) != 0)
+
+/* Used by perl, fish, and others */
+static __inline__ char* ctermid(char* s) {
+    if (s == 0) return (char*) "/dev/tty";
+    strcpy(s, "/dev/tty");
+    return s;
+}
+
 #if defined(__BIONIC_FORTIFY)
 
 __BEGIN_DECLS
@@ -462,4 +474,29 @@
 
 #endif /* defined(__BIONIC_FORTIFY) */
 
+__BEGIN_DECLS
+
+extern int open(const char*, int, ...);
+extern pid_t getpid();
+extern int unlink(const char*);
+static __inline__ FILE* tmpfile() {
+	int p = getpid();
+	char* path;
+	int i;
+	for (i = 0; i < 100; i++) {
+		unsigned int r = arc4random();
+		if (asprintf(&path, "@TERMUX_PREFIX@/tmp/tmpfile.%d-%u", p, r) == -1) return NULL;
+		int fd = open(path, O_RDWR | O_CREAT | O_EXCL | O_LARGEFILE, 0600);
+		free(path);
+		if (fd >= 0) {
+			FILE* result = fdopen(fd, "w+");
+			unlink(path);
+			return result;
+		}
+	}
+	return NULL;
+}
+
+__END_DECLS
+
 #endif /* _STDIO_H_ */