Add s6-ucspitlsc

1 files changed, 109 insertions, 0 deletions

diff --git a/src/conn-tools/s6-ucspitlsc.c b/src/conn-tools/s6-ucspitlsc.c
new file mode 100644
index 0000000..92660eb
--- /dev/null
+++ b/src/conn-tools/s6-ucspitlsc.c
@@ -0,0 +1,109 @@
+/* ISC license. */
+
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+
+#include <skalibs/gccattributes.h>
+#include <skalibs/types.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/webipc.h>
+
+#include <s6-networking/config.h>
+#include "s6tls-internal.h"
+
+#define USAGE "s6-ucspitlsc [ -S | -s ] [ -Y | -y ] [ -v verbosity ] [ -K timeout ] [ -Z | -z ] [ -k servername ] [ -6 fdr ] [ -7 fdw ] prog..."
+#define dieusage() strerr_dieusage(100, USAGE)
+
+static inline void child (int [4][2], uint32_t, unsigned int, unsigned int, char const *) gccattr_noreturn ;
+static inline void child (int p[4][2], uint32_t options, unsigned int verbosity, unsigned int kimeout, char const *servername)
+{
+  int fds[3] = { p[0][0], p[1][1], p[2][1] } ;
+  ssize_t r ;
+  char c ;
+  PROG = "s6-ucspitlsc" ;
+  close(p[2][0]) ;
+  close(p[0][1]) ;
+  close(p[1][0]) ;
+  if (fd_move(0, p[3][0]) < 0 || fd_move(1, p[3][1]) < 0)
+    strerr_diefu1sys(111, "move network fds to stdin/stdout") ;
+  r = read(p[2][1], &c, 1) ;
+  if (r < 0) strerr_diefu1sys(111, "read from control socket") ;
+  if (!r) _exit(0) ;
+  switch (c)
+  {
+    case 'y' :
+      close(p[2][1]) ;
+      p[2][1] = 0 ; /* we know 0 is open so it's a correct invalid value */
+    case 'Y' :
+      fd_shutdown(p[2][1], 0) ;
+      break ;
+    default :
+      strerr_dief1x(100, "unrecognized command on control socket") ;
+  }
+  s6tls_exec_tlscio(fds, options, verbosity, kimeout, servername) ;
+}
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  unsigned int verbosity = 1 ;
+  unsigned int kimeout = 0 ;
+  int p[4][2] = { [3] = { 6, 7 } } ;
+  uint32_t coptions = 0 ;
+  uint32_t poptions = 1 ;
+  char const *servername = 0 ;
+
+  PROG = "s6-ucspitlsc (parent)" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      int opt = subgetopt_r(argc, argv, "SsYyv:K:Zzk:6:7:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'S' : coptions |= 4 ; break ;
+        case 's' : coptions &= ~4 ; break ;
+        case 'Y' : coptions |= 1 ; coptions &= ~2 ; break ;
+        case 'y' : coptions |= 3 ; break ;
+        case 'v' : if (!uint0_scan(l.arg, &verbosity)) dieusage() ; break ;
+        case 'K' : if (!uint0_scan(l.arg, &kimeout)) dieusage() ; break ;
+        case 'Z' : poptions &= ~1 ; break ;
+        case 'z' : poptions |= 1 ; break ;
+        case 'k' : servername = l.arg ; break ;
+        case '6' :
+        {
+          unsigned int fd ;
+          if (!uint0_scan(l.arg, &fd)) dieusage() ;
+          p[3][0] = fd ;
+          break ;
+        }
+        case '7' :
+        {
+          unsigned int fd ;
+          if (!uint0_scan(l.arg, &fd)) dieusage() ;
+          p[3][1] = fd ;
+          break ;
+        }
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+  }
+  if (!argc) dieusage() ;
+  fd_sanitize() ;
+  if (fcntl(p[3][0], F_GETFD) < 0 || fcntl(p[3][1], F_GETFD) < 0)
+    strerr_diefu1sys(111, "check network fds") ;
+
+  if (ipc_pair_b(p[2]) < 0) strerr_diefu1sys(111, "ipc_pair") ;
+  if (pipe(p[0]) < 0 || pipe(p[1]) < 0) strerr_diefu1sys(111, "pipe") ;
+  switch (fork())
+  {
+    case -1 : strerr_diefu1sys(111, "fork") ;
+    case 0 : child(p, coptions, verbosity, kimeout, servername) ;
+    default : break ;
+  }
+  s6tls_ucspi_exec_app(argv, p, poptions) ;
+}