1055_all_glibc-resolv-dynamic.patch

   1 ripped from SuSE
   2
   3 if /etc/resolv.conf is updated, then make sure applications
   4 already running get the updated information.
   5
   6 http://bugs.gentoo.org/177416
   7
   8 --- libc/resolv/res_libc.c
   9 +++ libc/resolv/res_libc.c
  10 @@ -22,6 +22,7 @@
  11  #include <arpa/nameser.h>
  12  #include <resolv.h>
  13  #include <libc-lock.h>
  14 +#include <sys/stat.h>
  15
  16
  17  /* The following bit is copied from res_data.c (where it is #ifdef'ed
  18 @@ -101,6 +102,20 @@
  19  __res_maybe_init (res_state resp, int preinit)
  20  {
  21         if (resp->options & RES_INIT) {
  22 +               static time_t last_mtime, last_check;
  23 +               time_t now;
  24 +               struct stat statbuf;
  25 +
  26 +               time (&now);
  27 +               if (now != last_check) {
  28 +                       last_check = now;
  29 +                       if (stat (_PATH_RESCONF, &statbuf) == 0 && last_mtime != statbuf.st_mtime) {
  30 +                               last_mtime = statbuf.st_mtime;
  31 +                               atomicinclock (lock);
  32 +                               atomicinc (__res_initstamp);
  33 +                               atomicincunlock (lock);
  34 +                       }
  35 +               }
  36                 if (__res_initstamp != resp->_u._ext.initstamp) {
  37                         if (resp->nscount > 0) {
  38                                 __res_nclose (resp);