Function nix::unistd::pathconf

pub fn pathconf<P: ?Sized + NixPath>(
    path: &P, 
    var: PathconfVar
) -> Result<Option<c_long>>

Get path-dependent configurable system variables (see pathconf(2))

Returns the value of a path-dependent configurable system variable. Most supported variables also have associated compile-time constants, but POSIX allows their values to change at runtime. There are generally two types of pathconf variables: options and limits. See pathconf(2) for more details.

Parameters

• path: Lookup the value of var for this file or directory
• var: 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 2001.12
• Ok(None): the variable has no limit (for limit variables) or is unsupported (for option variables)
• Err(x): an error occurred