fdwalkSetCloexec
Mark every file descriptor equal to or greater than @lowfd to be closed at the next execve() or similar, as if via the FD_CLOEXEC flag.
Typically @lowfd will be 3, to leave standard input, standard output and standard error open after exec.
This is the same as Linux close_range (lowfd, ~0U, CLOSE_RANGE_CLOEXEC), but portable to other OSs and to older versions of Linux.
This function is async-signal safe, making it safe to call from a signal handler or a callback@GLib.SpawnChildSetupFunc, as long as @lowfd is non-negative. See man:signal(7) and man:signal-safety(7) for more details.
Return
0 on success, -1 with errno set on error
Since
2.80
Parameters
lowfd
Minimum fd to act on, which must be non-negative