diff --git a/libc/Android.mk b/libc/Android.mk
index 0d3e2c3..c32cc30 100644
--- a/libc/Android.mk
+++ b/libc/Android.mk
@@ -222,11 +222,13 @@
 	bionic/arc4random.c \
 	bionic/basename.c \
 	bionic/basename_r.c \
+	bionic/clearenv.c \
 	bionic/dirname.c \
 	bionic/dirname_r.c \
 	bionic/drand48.c \
 	bionic/erand48.c \
 	bionic/err.c \
+	bionic/fdprintf.c \
 	bionic/fork.c \
 	bionic/fts.c \
 	bionic/if_nametoindex.c \
diff --git a/libc/bionic/clearenv.c b/libc/bionic/clearenv.c
new file mode 100644
index 0000000..ffc58d9
--- /dev/null
+++ b/libc/bionic/clearenv.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+extern char** environ;
+
+int clearenv(void)
+{
+	char **P = environ;
+	int offset;
+
+	for (P = &environ[offset]; *P; ++P)
+		*P = 0;
+        return 0;
+}
diff --git a/libc/bionic/fdprintf.c b/libc/bionic/fdprintf.c
new file mode 100644
index 0000000..c1d05ad
--- /dev/null
+++ b/libc/bionic/fdprintf.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int vfdprintf(int fd, const char * __restrict format, __va_list ap)
+{
+	char *buf=0;
+	int ret;
+	ret = vasprintf(&buf, format, ap);
+	if (ret < 0)
+		goto end;
+
+	ret = write(fd, buf, ret);
+	free(buf);
+end:
+	return ret;
+}
+
+int fdprintf(int fd, const char * __restrict format, ...)
+{
+	__va_list ap;
+	int ret;
+
+	va_start(ap, format);
+	ret = vfdprintf(fd, format, ap);
+	va_end(ap);
+
+	return ret;
+}
diff --git a/libc/bionic/stubs.c b/libc/bionic/stubs.c
index 365f21a..586d497 100644
--- a/libc/bionic/stubs.c
+++ b/libc/bionic/stubs.c
@@ -361,6 +361,12 @@
     return NULL;
 }
 
+int ttyname_r(int fd, char *buf, size_t buflen)
+{
+    fprintf(stderr, "FIX ME! implement ttyname_r() %s:%d\n", __FILE__, __LINE__);
+    return -ERANGE;
+}
+
 struct netent *getnetbyaddr(uint32_t net, int type)
 {
     fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
@@ -378,3 +384,20 @@
     fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
     return NULL;
 }
+
+char* getusershell(void)
+{
+    fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
+    return NULL;
+}
+
+void setusershell(void)
+{
+    fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
+}
+
+void endusershell(void)
+{
+    fprintf(stderr, "FIX ME! implement %s() %s:%d\n", __FUNCTION__, __FILE__, __LINE__);
+}
+
diff --git a/libc/include/stdio.h b/libc/include/stdio.h
index 791b260..f0e103e 100644
--- a/libc/include/stdio.h
+++ b/libc/include/stdio.h
@@ -437,4 +437,15 @@
 #define getchar_unlocked()	getc_unlocked(stdin)
 #define putchar_unlocked(c)	putc_unlocked(c, stdout)
 
+#ifdef _GNU_SOURCE
+/*
+ * glibc defines dprintf(int, const char*, ...), which is poorly named
+ * and likely to conflict with locally defined debugging printfs
+ * fdprintf is a better name, and some programs that use fdprintf use a
+ * #define fdprintf dprintf for compatibility
+ */
+int fdprintf(int, const char*, ...);
+int vfdprintf(int, const char*, __va_list);
+#endif /* _GNU_SOURCE */
+
 #endif /* _STDIO_H_ */
diff --git a/libc/include/unistd.h b/libc/include/unistd.h
index 954f34e..b4f1dda 100644
--- a/libc/include/unistd.h
+++ b/libc/include/unistd.h
@@ -99,6 +99,10 @@
 extern int issetugid(void);
 extern char* getlogin(void);
 extern int getlogin_r(char* name, size_t namesize);
+extern char* getusershell(void);
+extern void setusershell(void);
+extern void endusershell(void);
+
 
 
 /* Macros for access() */
@@ -163,6 +167,8 @@
 extern int optind, opterr, optopt;
 
 extern int isatty(int);
+extern char* ttyname(int);
+extern int ttyname_r(int, char*, size_t);
 
 extern int  acct(const char*  filepath);