Add implementation of fdprintf, clearenv, and stubs for ttyname_r, *usershell
Change-Id: I5fe7e8b6ee5edbb49e707c3b6737a58563781fa3
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_ */