From fad2b86c9e7eaadb973b50a1bc0e2accc1a96cfd Mon Sep 17 00:00:00 2001
From: Denis Vlasenko <vda.linux@googlemail.com>
Date: Thu, 31 May 2007 22:16:38 +0000
Subject: use "glibc errno" trick not only for ash, but for entire busybox
 (add/remove: 1/1 grow/shrink: 37/37 up/down: 139/-228)        Total: -89
 bytes

---
 applets/applets.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'applets')

diff --git a/applets/applets.c b/applets/applets.c
index e905ebec4..bd3704394 100644
--- a/applets/applets.c
+++ b/applets/applets.c
@@ -641,10 +641,19 @@ void run_applet_and_exit(const char *name, char **argv)
 }
 
 
+#ifdef __GLIBC__
+/* Make it reside in R/W memory: */
+int *const bb_errno __attribute__ ((section (".data")));
+#endif
+
 int main(int argc, char **argv)
 {
 	const char *s;
 
+#ifdef __GLIBC__
+	(*(int **)&bb_errno) = __errno_location();
+#endif
+
 #if !BB_MMU
 	/* NOMMU re-exec trick sets high-order bit in first byte of name */
 	if (argv[0][0] & 0x80) {
-- 
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