X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fgeneral.c;h=00a1ae808f2d7ef23d3ba4faf1ba693efb9ac76e;hb=dd34699eca563b946f6d9665b1b85fdb57e3bb25;hp=15025a406c8375a68e60c86c921d24282a087a82;hpb=09957b1ca58af52bbc90e88ec198f14b8a06c0f7;p=adns.git

diff --git a/src/general.c b/src/general.c
index 15025a4..00a1ae8 100644
--- a/src/general.c
+++ b/src/general.c
@@ -4,7 +4,7 @@
  * - vbuf handling
  */
 /*
- *  This file is part of adns, which is Copyright (C) 1997, 1998 Ian Jackson
+ *  This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
  *  
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -22,8 +22,10 @@
  */
 
 #include <stdlib.h>
-#include <string.h>
 
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
 #include <arpa/inet.h>
 
 #include "internal.h"
@@ -197,16 +199,18 @@ adns_status adns_rr_info(adns_rrtype type,
   return st;
 }
 
-#define SINFO(n,s) { adns_s_##n, s }
+#define SINFO(n,s) { adns_s_##n, #n, s }
 
 static const struct sinfo {
   adns_status st;
+  const char *abbrev;
   const char *string;
 } sinfos[]= {
   SINFO(  ok,                  "OK"                                            ),
 
   SINFO(  nomemory,            "Out of memory"                                 ),
   SINFO(  unknownrrtype,       "Query not implemented in DNS library"          ),
+  SINFO(  systemfail,          "General resolver or system failure"            ),
 
   SINFO(  timeout,             "DNS query timed out"                           ),
   SINFO(  allservfail,         "All nameservers failed"                        ),
@@ -221,7 +225,7 @@ static const struct sinfo {
   SINFO(  rcodeunknown,        "Nameserver sent unknown response code"         ),
   
   SINFO(  inconsistent,        "Inconsistent resource records in DNS"          ),
-  SINFO(  prohibitedcname,     "DNS data refers to an alias"                   ),
+  SINFO(  prohibitedcname,     "DNS alias found where canonical name wanted"   ),
   SINFO(  answerdomaininvalid, "Found syntactically invalid domain name"       ),
   SINFO(  answerdomaintoolong, "Found overly-long domain name"                 ),
   SINFO(  invaliddata,         "Found invalid DNS data"                        ),
@@ -241,16 +245,22 @@ static int si_compar(const void *key, const void *elem) {
   return *st < si->st ? -1 : *st > si->st ? 1 : 0;
 }
 
+static const struct sinfo *findsinfo(adns_status st) {
+  return bsearch(&st,sinfos,sizeof(sinfos)/sizeof(*sinfos),sizeof(*sinfos),si_compar);
+}
+
 const char *adns_strerror(adns_status st) {
-  static char buf[100];
+  const struct sinfo *si;
+
+  si= findsinfo(st);
+  return si->string;
+}
 
+const char *adns_errabbrev(adns_status st) {
   const struct sinfo *si;
 
-  si= bsearch(&st,sinfos,sizeof(sinfos)/sizeof(*si),sizeof(*si),si_compar);
-  if (si) return si->string;
-  
-  snprintf(buf,sizeof(buf),"code %d",st);
-  return buf;
+  si= findsinfo(st);
+  return si->abbrev;
 }
 
 void adns__isort(void *array, int nobjs, int sz, void *tempbuf,
@@ -270,3 +280,32 @@ void adns__isort(void *array, int nobjs, int sz, void *tempbuf,
     }
   }
 }
+
+/* SIGPIPE protection. */
+
+void adns__sigpipe_protect(adns_state ads) {
+  sigset_t toblock;
+  struct sigaction sa;
+  int r;
+
+  if (ads->iflags & adns_if_nosigpipe) return;
+
+  sigfillset(&toblock);
+  sigdelset(&toblock,SIGPIPE);
+
+  sa.sa_handler= SIG_IGN;
+  sigfillset(&sa.sa_mask);
+  sa.sa_flags= 0;
+  
+  r= sigprocmask(SIG_SETMASK,&toblock,&ads->stdsigmask); assert(!r);
+  r= sigaction(SIGPIPE,&sa,&ads->stdsigpipe); assert(!r);
+}
+
+void adns__sigpipe_unprotect(adns_state ads) {
+  int r;
+
+  if (ads->iflags & adns_if_nosigpipe) return;
+
+  r= sigaction(SIGPIPE,&ads->stdsigpipe,0); assert(!r);
+  r= sigprocmask(SIG_SETMASK,&ads->stdsigmask,0); assert(!r);
+}