tor

commit ed28f2a1b3b1d40027a8b8d8b8a3a5d112ae3829
parent 0591db2d7cc28ff6ba22e732c3ced5258835178f
Author: Jim Newsome <jnewsome@torproject.org>
Date:   Mon,  2 Jun 2025 17:09:20 -0500

Add tor_pipe_cloexec

Diffstat:
M
src/lib/fdio/fdio.c
 | 
28
++++++++++++++++++++++++++++
M
src/lib/fdio/fdio.h
 | 
1
+

2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/src/lib/fdio/fdio.c b/src/lib/fdio/fdio.c
@@ -14,6 +14,9 @@
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
 #ifdef _WIN32
 #include <windows.h>
 #endif
@@ -118,3 +121,28 @@ write_all_to_fd_minimal(int fd, const char *buf, size_t count)
   }
   return 0;
 }
+
+#if defined(HAVE_PIPE2) && defined(O_CLOEXEC)
+int
+tor_pipe_cloexec(int pipefd[2])
+{
+  return pipe2(pipefd, O_CLOEXEC);
+}
+#elif defined(HAVE_PIPE) && defined(FD_CLOEXEC)
+int
+tor_pipe_cloexec(int pipefd[2])
+{
+  if (pipe(pipefd)) {
+    return -1;
+  }
+  if (fcntl(pipefd[0], F_SETFD, FD_CLOEXEC)) {
+    return -1;
+  }
+  if (fcntl(pipefd[1], F_SETFD, FD_CLOEXEC)) {
+    return -1;
+  }
+  return 0;
+}
+#else
+/* Intentionally leave symbol undefined. */
+#endif
diff --git a/src/lib/fdio/fdio.h b/src/lib/fdio/fdio.h
@@ -22,5 +22,6 @@ int tor_fd_setpos(int fd, off_t pos);
 int tor_fd_seekend(int fd);
 int tor_ftruncate(int fd);
 int write_all_to_fd_minimal(int fd, const char *buf, size_t count);
+int tor_pipe_cloexec(int pipefd[2]);
 
 #endif /* !defined(TOR_FDIO_H) */