libc/inet: Unbreak gethostent()

Although gethostent() is obsoleted, there is no reason to keep it broken.
Fix two problems:

* commit f65e66078b "resolver: switch to config parser" leave an extra break
  statement in case of GETHOSTENT in __read_etc_hosts_r. In result,
  output buffer wasn't initialized at all.

* gethostent static buffer has insufficient size to store aliases,
  so __read_etc_hosts_r always returns ERANGE. Restore ALIAS_DIM define.

Add test-case.

Signed-off-by: Leonid Lisovskiy <lly.dev@gmail.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/test/inet/gethost.c b/test/inet/gethost.c
new file mode 100644
index 000000000..77467e9e3
--- /dev/null
+++ b/test/inet/gethost.c
@@ -0,0 +1,40 @@
+#include <errno.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+
+int main(void)
+{
+       in_addr_t addr = inet_addr("127.0.0.1");
+       struct hostent *hent;
+
+       hent = gethostent();
+       if (hent == NULL) {
+               printf("gethostent(%d):%s\n", errno, hstrerror(h_errno));
+               exit(1);
+       }
+
+       hent = gethostbyname("localhost");
+       if (hent == NULL) {
+               printf("gethostbyname(%d):%s\n", errno, hstrerror(h_errno));
+               exit(1);
+       }
+
+       hent = gethostbyname2("localhost", AF_INET);
+       if (hent == NULL) {
+               printf("gethostbyname2(%d):%s\n", errno, hstrerror(h_errno));
+               exit(1);
+       }
+
+       hent = gethostbyaddr(&addr, sizeof(addr), AF_INET);
+       if (hent == NULL) {
+               printf("gethostbyaddr(%d):%s\n", errno, hstrerror(h_errno));
+               exit(1);
+       }
+
+       return 0;
+}
+