Struct yarf_sys::fuse_opt

#[repr(C)]
pub struct fuse_opt {
    pub templ: *const c_char,
    pub offset: c_ulong,
    pub value: c_int,
}

Option description

This structure describes a single option, and and action associated with it, in case it matches.

More than one such match may occur, in which case the action for each match is executed.

There are three possible actions in case of a match:

i) An integer (int or unsigned) variable determined by 'offset' is set to 'value'

ii) The processing function is called, with 'value' as the key

iii) An integer (any) or string (char *) variable determined by 'offset' is set to the value of an option parameter

'offset' should normally be either set to

• 'offsetof(struct foo, member)' actions i) and iii)

• -1 action ii)

The 'offsetof()' macro is defined in the <stddef.h> header.

The template determines which options match, and also have an effect on the action. Normally the action is either i) or ii), but if a format is present in the template, then action iii) is performed.

The types of templates are:

1. "-x", "-foo", "--foo", "--foo-bar", etc. These match only themselves. Invalid values are "--" and anything beginning with "-o"

2. "foo", "foo-bar", etc. These match "-ofoo", "-ofoo-bar" or the relevant option in a comma separated option list

3. "bar=", "--foo=", etc. These are variations of 1) and 2) which have a parameter

4. "bar=%s", "--foo=%lu", etc. Same matching as above but perform action iii).

5. "-x ", etc. Matches either "-xparam" or "-x param" as two separate arguments

6. "-x %s", etc. Combination of 4) and 5)

If the format is "%s", memory is allocated for the string unlike with scanf().

Fields

templ: *const c_char

Matching template and optional parameter formatting

offset: c_ulong

Offset of variable within 'data' parameter of fuse_opt_parse() or -1

value: c_int

Value to set the variable to, or to be passed as 'key' to the processing function. Ignored if template has a format

Trait Implementations

impl Copy for fuse_opt

impl Clone for fuse_opt

fn clone(&self) -> fuse_opt

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for fuse_opt

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.