1 files changed, 43 insertions, 0 deletions
diff --git a/src/conn-tools/s6tls_sync_and_exec_app.c b/src/conn-tools/s6tls_sync_and_exec_app.c
new file mode 100644
index 0000000..4ae63fa
--- /dev/null
+++ b/src/conn-tools/s6tls_sync_and_exec_app.c
@@ -0,0 +1,43 @@
+/* ISC license. */
+
+#include <stdint.h>
+#include <unistd.h>
+
+#include <skalibs/posixplz.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/env.h>
+#include <skalibs/djbunix.h>
+
+#include "s6tls-internal.h"
+
+#define MAXENVSIZE 2048
+
+void s6tls_sync_and_exec_app (char const *const *argv, int const p[4][2], pid_t pid, uint32_t options)
+{
+  char buf[sizeof(s6tls_envvars) + MAXENVSIZE] ;
+  size_t m = 0 ;
+  ssize_t r ;
+  close(p[2][1]) ;
+  close(p[1][1]) ;
+  close(p[0][0]) ;
+  if (fd_move(p[3][0], p[1][0]) < 0 || fd_move(p[3][1], p[0][1]) < 0)
+    strerr_diefu1sys(111, "move file descriptors") ;
+  if (options & 1)
+  {
+    memcpy(buf + m, s6tls_envvars, sizeof(s6tls_envvars)) ;
+    m += sizeof(s6tls_envvars) ;
+  }
+  r = read(p[2][0], buf + m, MAXENVSIZE) ;
+  if (r < 0) strerr_diefu1sys(111, "read from handshake notification pipe") ;
+  if (!r)
+  {
+    int wstat ;
+    if (wait_pid(pid, &wstat) < 0)
+      strerr_diefu1sys(111, "wait") ;
+    _exit(wait_estatus(wstat)) ;
+  }
+  if (r >= MAXENVSIZE)
+    strerr_dief1x(100, "SSL data too large") ;
+  m += r - 1 ;
+  xpathexec_r(argv, (char const *const *)environ, env_len((char const *const *)environ), buf, m) ;
+}