Support input from pipes (subprocesses).

[cubemap] / main.cpp

diff --git a/main.cpp b/main.cpp
index 737f0c3573acea88fa7d9f0585aee69d95ec0838..18976fc833b6d49a981af6fc67e79fe1efa64469 100644 (file)
--- a/main.cpp
+++ b/main.cpp
@@ -1,5 +1,6 @@
 #include <assert.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <getopt.h>
 #include <limits.h>
 #include <signal.h>
@@ -661,6 +662,10 @@ start:
        char buf[16];
        sprintf(buf, "%d", state_fd);
 
+       // Unset the close-on-exec flag for the state fd.
+       // (This can't leak into a child, since there's only one thread left.)
+       fcntl(state_fd, F_SETFD, 0);
+
        for ( ;; ) {
                execlp(argv0_canon, argv0_canon, config_filename_canon, "--state", buf, nullptr);
                open_logs(config.log_destinations);