1 files changed, 62 insertions, 0 deletions
diff --git a/src/clients/s6-dnsip4.c b/src/clients/s6-dnsip4.c
new file mode 100644
index 0000000..03c52dd
--- /dev/null
+++ b/src/clients/s6-dnsip4.c
@@ -0,0 +1,62 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/uint.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/buffer.h>
+#include <skalibs/tai.h>
+#include <skalibs/random.h>
+#include <s6-dns/s6dns.h>
+
+#define USAGE "s6-dnsip4 [ -q ] [ -r ] [ -t timeout ] domain"
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv)
+{
+  stralloc ips = STRALLOC_ZERO ;
+  tain_t deadline ;
+  unsigned int i = 0 ;
+  int flagqualify = 0 ;
+  int flagunsort = 0 ;
+  PROG = "s6-dnsip4" ;
+
+  for (;;)
+  {
+    register int opt = subgetopt(argc, argv, "qrt:") ;
+    if (opt == -1) break ;
+    switch (opt)
+    {
+      case 'q' : flagqualify = 1 ; break ;
+      case 'r' : flagunsort = 1 ; break ;
+      case 't' : if (!uint0_scan(subgetopt_here.arg, &i)) dieusage() ; break ;
+      default : dieusage() ;
+    }
+  }
+  argc -= subgetopt_here.ind ; argv += subgetopt_here.ind ;
+  if (argc < 1) dieusage() ;
+
+  tain_now_g() ;
+  if (i) tain_from_millisecs(&deadline, i) ; else deadline = tain_infinite_relative ;
+  tain_add_g(&deadline, &deadline) ;
+  if (!s6dns_init()) strerr_diefu1sys(111, "s6dns_init") ;
+  {
+    register int r = s6dns_resolve_a_g(&ips, argv[0], str_len(argv[0]), flagqualify, &deadline) ;
+    if (r < 0) strerr_diefu2sys((errno == ETIMEDOUT) ? 99 : 111, "resolve ", argv[0]) ;
+    if (!r) strerr_diefu4x(2, "resolve ", argv[0], ": ", s6dns_constants_error_str(errno)) ;
+  }
+  if (!ips.len) return 1 ;
+  if (flagunsort) random_unsort(ips.s, ips.len / 4, 4) ;
+  for (i = 0 ; i < ips.len / 4 ; i++)
+  {
+    char fmt[IP4_FMT] ;
+    register unsigned int n = ip4_fmt(fmt, ips.s + 4 * i) ;
+    fmt[n++] = '\n' ;
+    if (buffer_put(buffer_1small, fmt, n) < (int)n)
+      strerr_diefu1sys(111, "write to stdout") ;
+  }
+  if (!buffer_flush(buffer_1small))
+    strerr_diefu1sys(111, "write to stdout") ;
+  return 0 ;
+}