* DNS resolution in dietlibc failed randomly on 64-bit platforms.

Patch backported from dietlibc CVS.

svn path=/nixpkgs/trunk/; revision=7743

pkgs/os-specific/linux/dietlibc/default.nix

@@ -22,7 +22,11 @@ stdenv.mkDerivation {
 
     # wchar.h declares lots of functions that don't actually exist.
     # Remove them.
-    ./no-wchar.h
+    ./no-wchar.patch
+
+    # Fix to get DNS resolution to work on 64-bit platforms.  Taken
+    # from 0.31 CVS.
+    ./dns64.patch
 
   ];
 }

pkgs/os-specific/linux/dietlibc/dns64.patch

@@ -0,0 +1,109 @@
+Only in dietlibc-0.30: CHANGES.orig
+diff -rc dietlibc-0.30-orig/libcruft/dnscruft2.c dietlibc-0.30/libcruft/dnscruft2.c
+*** dietlibc-0.30-orig/libcruft/dnscruft2.c	2005-05-01 22:08:25.000000000 +0200
+--- dietlibc-0.30/libcruft/dnscruft2.c	2007-01-22 15:32:18.000000000 +0100
+***************
+*** 5,11 ****
+  #include <netdb.h>
+  #include <stdlib.h>
+  #include <arpa/inet.h>
+- #include <sys/poll.h>
+  #include <unistd.h>
+  #include <errno.h>
+  #include <arpa/nameser.h>
+--- 5,10 ----
+diff -rc dietlibc-0.30-orig/libcruft/dnscruft.c dietlibc-0.30/libcruft/dnscruft.c
+*** dietlibc-0.30-orig/libcruft/dnscruft.c	2006-06-18 20:32:35.000000000 +0200
+--- dietlibc-0.30/libcruft/dnscruft.c	2007-01-22 15:32:18.000000000 +0100
+***************
+*** 45,53 ****
+    tmp=socket(PF_INET6,SOCK_DGRAM,IPPROTO_UDP);
+    if (tmp<0) return;
+    fcntl(tmp,F_SETFD,FD_CLOEXEC);
+    si.sin6_family=AF_INET6;
+-   si.sin6_port=0;
+-   memset(&si.sin6_addr,0,16);
+    if (bind(tmp,(struct sockaddr*)&si,sizeof(si))) return;
+    __dns_fd6=tmp;
+  }
+--- 45,52 ----
+    tmp=socket(PF_INET6,SOCK_DGRAM,IPPROTO_UDP);
+    if (tmp<0) return;
+    fcntl(tmp,F_SETFD,FD_CLOEXEC);
++   memset(&si,0,sizeof(si));
+    si.sin6_family=AF_INET6;
+    if (bind(tmp,(struct sockaddr*)&si,sizeof(si))) return;
+    __dns_fd6=tmp;
+  }
+diff -rc dietlibc-0.30-orig/libcruft/res_mkquery.c dietlibc-0.30/libcruft/res_mkquery.c
+*** dietlibc-0.30-orig/libcruft/res_mkquery.c	2004-11-10 18:45:17.000000000 +0100
+--- dietlibc-0.30/libcruft/res_mkquery.c	2007-01-22 15:32:18.000000000 +0100
+***************
+*** 42,51 ****
+  int res_mkquery(int op, const char *dname, int class, int type, char* data,
+  		int datalen, const unsigned char* newrr, char* buf, int buflen) {
+    unsigned char packet[512];
+!   unsigned long len=0;
+!   memmove(packet,dnspacket,12);
+    if ((_res.options&RES_RECURSE)==0) packet[2]=0;
+-   *(unsigned short*)packet=rand();
+    {
+      unsigned char* x;
+      const char* y,* tmp;
+--- 42,55 ----
+  int res_mkquery(int op, const char *dname, int class, int type, char* data,
+  		int datalen, const unsigned char* newrr, char* buf, int buflen) {
+    unsigned char packet[512];
+!   unsigned long len;
+! 
+!   memcpy(packet,dnspacket,12);
+!   len=rand();
+!   packet[0]=len;
+!   packet[1]=len>>8;
+!   len=0;
+    if ((_res.options&RES_RECURSE)==0) packet[2]=0;
+    {
+      unsigned char* x;
+      const char* y,* tmp;
+diff -rc dietlibc-0.30-orig/libcruft/res_query.c dietlibc-0.30/libcruft/res_query.c
+*** dietlibc-0.30-orig/libcruft/res_query.c	2005-10-14 17:37:59.000000000 +0200
+--- dietlibc-0.30/libcruft/res_query.c	2007-01-22 15:32:18.000000000 +0100
+***************
+*** 99,105 ****
+  	duh[1].fd=pnpfd;
+        } else {
+  	duh[1].fd=-1;
+! 	duh[1].revents=0;
+        }
+  
+  #endif
+--- 99,105 ----
+  	duh[1].fd=pnpfd;
+        } else {
+  	duh[1].fd=-1;
+! 	duh[1].events=0;
+        }
+  
+  #endif
+diff -rc dietlibc-0.30-orig/syscalls.s/__guard.S dietlibc-0.30/syscalls.s/__guard.S
+*** dietlibc-0.30-orig/syscalls.s/__guard.S	2006-04-07 17:33:20.000000000 +0200
+--- dietlibc-0.30/syscalls.s/__guard.S	2007-01-22 15:32:18.000000000 +0100
+***************
+*** 1,3 ****
+--- 1,4 ----
++ #include <endian.h>
+  .data
+  .type __guard,@object
+  .global __guard
+***************
+*** 5,9 ****
+--- 6,14 ----
+  .global __stack_chk_guard
+  __guard:
+  __stack_chk_guard:
++ #if __WORDSIZE == 64
++ .quad 0xaff00
++ #else
+  .long 0xaff00
++ #endif
+