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-rw-r--r--libc/inet/resolv.c95
1 files changed, 84 insertions, 11 deletions
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
index 69fa1c148..e785e47bd 100644
--- a/libc/inet/resolv.c
+++ b/libc/inet/resolv.c
@@ -41,6 +41,10 @@
* address family parameter and improved IPv6 support for get_hosts_byname
* and read_etc_hosts; getnameinfo() port from glibc; defined
* defined ip6addr_any and in6addr_loopback)
+ *
+ * 2-Feb-2002 Erik Andersen <andersee@debian.org>
+ * Added gethostent(), sethostent(), and endhostent()
+ *
*/
#define __FORCE_GLIBC
@@ -103,13 +107,21 @@ struct resolv_answer {
int rdoffset;
};
+enum etc_hosts_action {
+ GET_HOSTS_BYNAME = 0,
+ GETHOSTENT,
+ GET_HOSTS_BYADDR,
+};
+
+
extern int nameservers;
extern char * nameserver[MAX_SERVERS];
extern int searchdomains;
extern char * searchdomain[MAX_SEARCH];
extern struct hostent * get_hosts_byname(const char * name, int type);
extern struct hostent * get_hosts_byaddr(const char * addr, int len, int type);
-extern struct hostent * read_etc_hosts(const char * name, int type, int ip);
+extern void __open_etc_hosts(FILE *fp);
+extern struct hostent * read_etc_hosts(FILE *fp, const char * name, int type, enum etc_hosts_action action);
extern int resolve_address(const char * address, int nscount,
char ** nsip, struct in_addr * in);
extern int resolve_mailbox(const char * address, int nscount,
@@ -1315,7 +1327,15 @@ struct hostent *gethostbyaddr (const void *addr, socklen_t len, int type)
#ifdef L_read_etc_hosts
-struct hostent * read_etc_hosts(const char * name, int type, int ip)
+void __open_etc_hosts(FILE *fp)
+{
+ if ((fp = fopen("/etc/hosts", "r")) == NULL) {
+ fp = fopen("/etc/config/hosts", "r");
+ }
+ return;
+}
+
+struct hostent * read_etc_hosts(FILE * fp, const char * name, int type, enum etc_hosts_action action)
{
static struct hostent h;
static struct in_addr in;
@@ -1325,15 +1345,17 @@ struct hostent * read_etc_hosts(const char * name, int type, int ip)
static struct in6_addr *addr_list6[2];
#endif /* __UCLIBC_HAS_IPV6__ */
static char line[80];
- FILE *fp;
char *cp;
#define MAX_ALIAS 5
char *alias[MAX_ALIAS];
int aliases, i;
- if ((fp = fopen("/etc/hosts", "r")) == NULL &&
- (fp = fopen("/etc/config/hosts", "r")) == NULL)
- return((struct hostent *) NULL);
+ if (action!=GETHOSTENT) {
+ __open_etc_hosts(fp);
+ if (fp == NULL) {
+ return((struct hostent *)NULL);
+ }
+ }
while (fgets(line, sizeof(line), fp)) {
if ((cp = strchr(line, '#')))
@@ -1355,10 +1377,14 @@ struct hostent * read_etc_hosts(const char * name, int type, int ip)
if (aliases < 2)
continue; /* syntax error really */
- if (ip) {
+ if (action==GETHOSTENT) {
+ /* Return whatever the next entry happens to be. */
+ break;
+ } else if (action==GET_HOSTS_BYADDR) {
if (strcmp(name, alias[0]) != 0)
continue;
} else {
+ /* GET_HOSTS_BYNAME */
for (i = 1; i < aliases; i++)
if (strcasecmp(name, alias[i]) == 0)
break;
@@ -1386,20 +1412,67 @@ struct hostent * read_etc_hosts(const char * name, int type, int ip)
break; /* bad ip address */
}
- fclose(fp);
+ if (action!=GETHOSTENT) {
+ fclose(fp);
+ }
return(&h);
}
- fclose(fp);
+ if (action!=GETHOSTENT) {
+ fclose(fp);
+ }
return((struct hostent *) NULL);
}
#endif
+#ifdef L_endhostent
+extern int __stay_open;
+extern FILE * __gethostent_fp;
+void endhostent (void)
+{
+ __stay_open = 0;
+ if (__gethostent_fp) {
+ fclose(__gethostent_fp);
+ }
+}
+#endif
+
+#ifdef L_sethostent
+extern int __stay_open;
+void sethostent (int stay_open)
+{
+ __stay_open = stay_open;
+}
+#endif
+
+#ifdef L_gethostent
+int __stay_open;
+FILE * __gethostent_fp;
+
+struct hostent *gethostent (void)
+{
+ struct hostent *host;
+
+ if (__gethostent_fp == NULL) {
+ __open_etc_hosts(__gethostent_fp);
+ if (__gethostent_fp == NULL) {
+ return((struct hostent *)NULL);
+ }
+ }
+
+ host = read_etc_hosts(__gethostent_fp, NULL, AF_INET, GETHOSTENT);
+ if (__stay_open==0) {
+ fclose(__gethostent_fp);
+ }
+ return(host);
+}
+#endif
+
#ifdef L_get_hosts_byname
struct hostent * get_hosts_byname(const char * name, int type)
{
- return(read_etc_hosts(name, type, 0));
+ return(read_etc_hosts(NULL, name, type, GET_HOSTS_BYNAME));
}
#endif
@@ -1431,7 +1504,7 @@ struct hostent * get_hosts_byaddr(const char * addr, int len, int type)
inet_ntop(type, addr, ipaddr, sizeof(ipaddr));
- return(read_etc_hosts(ipaddr, type, 1));
+ return(read_etc_hosts(NULL, ipaddr, type, GET_HOSTS_BYADDR));
}
#endif