From 679a67566037cd74c608f78b8de165063d1c3f75 Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Mon, 19 Feb 2007 02:03:58 +0000
Subject: [PATCH] add debug messages for initialization failures

---
 ares_gethostbyaddr.c |  1 +
 ares_gethostbyname.c | 19 +++++++++++++++++--
 ares_init.c          |  4 ++++
 ares_search.c        |  1 +
 4 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/ares_gethostbyaddr.c b/ares_gethostbyaddr.c
index 0faeaec2..db0ac46b 100644
--- a/ares_gethostbyaddr.c
+++ b/ares_gethostbyaddr.c
@@ -224,6 +224,7 @@ static int file_lookup(union ares_addr *addr, int family, struct hostent **host)
       switch(error) 
         {
         case ENOENT:
+        case ESRCH:
           return ARES_ENOTFOUND;
         default:
           DEBUGF(fprintf(stderr, "fopen() failed with error: %d %s\n",
diff --git a/ares_gethostbyname.c b/ares_gethostbyname.c
index 00d78861..1bd5ac95 100644
--- a/ares_gethostbyname.c
+++ b/ares_gethostbyname.c
@@ -248,6 +248,7 @@ static int file_lookup(const char *name, int family, struct hostent **host)
   FILE *fp;
   char **alias;
   int status;
+  int error;
 
 #ifdef WIN32
   char PATH_HOSTS[MAX_PATH];
@@ -280,8 +281,22 @@ static int file_lookup(const char *name, int family, struct hostent **host)
 
   fp = fopen(PATH_HOSTS, "r");
   if (!fp)
-    return ARES_ENOTFOUND;
-
+    {
+      error = ERRNO;
+      switch(error) 
+        {
+        case ENOENT:
+        case ESRCH:
+          return ARES_ENOTFOUND;
+        default:
+          DEBUGF(fprintf(stderr, "fopen() failed with error: %d %s\n",
+                         error, strerror(error)));
+          DEBUGF(fprintf(stderr, "Error opening file: %s\n", 
+                         PATH_HOSTS));
+          *host = NULL;
+          return ARES_EFILE;
+        }
+    }
   while ((status = ares__get_hostent(fp, family, host)) == ARES_SUCCESS)
     {
       if (strcasecmp((*host)->h_name, name) == 0)
diff --git a/ares_init.c b/ares_init.c
index 5268745d..8f78fa44 100644
--- a/ares_init.c
+++ b/ares_init.c
@@ -639,6 +639,7 @@ DhcpNameServer
       error = ERRNO;
       switch(error) {
       case ENOENT:
+      case ESRCH:
         status = ARES_EOF;
         break;
       default:
@@ -664,6 +665,7 @@ DhcpNameServer
         error = ERRNO;
         switch(error) {
         case ENOENT:
+        case ESRCH:
           status = ARES_EOF;
           break;
         default:
@@ -690,6 +692,7 @@ DhcpNameServer
         error = ERRNO;
         switch(error) {
         case ENOENT:
+        case ESRCH:
           status = ARES_EOF;
           break;
         default:
@@ -716,6 +719,7 @@ DhcpNameServer
         error = ERRNO;
         switch(error) {
         case ENOENT:
+        case ESRCH:
           status = ARES_EOF;
           break;
         default:
diff --git a/ares_search.c b/ares_search.c
index 4b898a77..4ff54532 100644
--- a/ares_search.c
+++ b/ares_search.c
@@ -273,6 +273,7 @@ static int single_domain(ares_channel channel, const char *name, char **s)
               switch(error) 
                 {
                 case ENOENT:
+                case ESRCH:
                   break;
                 default:
                   DEBUGF(fprintf(stderr, "fopen() failed with error: %d %s\n",