Function nix::unistd::fpathconf [−][src]
pub fn fpathconf(fd: RawFd, var: PathconfVar) -> Result<Option<c_long>>
Like pathconf
, but works with file descriptors instead of paths (see
fpathconf(2))
Parameters
fd
: The file descriptor whose variable should be interrogatedvar
: The pathconf variable to lookup
Returns
Ok(Some(x))
: the variable’s limit (for limit variables) or its implementation level (for option variables). Implementation levels are usually a decimal-coded date, such as 200112 for POSIX 2001.12Ok(None)
: the variable has no limit (for limit variables) or is unsupported (for option variables)Err(x)
: an error occurred