Trait gio::prelude::UnixFDListExtManual
source · [−]pub trait UnixFDListExtManual: Sized {
fn append<T: AsRawFd>(&self, fd: T) -> Result<i32, Error>;
fn get(&self, index_: i32) -> Result<RawFd, Error>;
fn peek_fds(&self) -> Vec<RawFd>;
fn steal_fds(&self) -> Vec<RawFd>;
}Required Methods
Adds a file descriptor to self.
The file descriptor is duplicated using dup(). You keep your copy
of the descriptor and the copy contained in self will be closed
when self is finalized.
A possible cause of failure is exceeding the per-process or system-wide file descriptor limit.
The index of the file descriptor in the list is returned. If you use
this index with UnixFDListExtManual::get() then you will receive back a
duplicated copy of the same file descriptor.
fd
a valid open file descriptor
Returns
the index of the appended fd in case of success, else -1
(and error is set)
Gets a file descriptor out of self.
index_ specifies the index of the file descriptor to get. It is a
programmer error for index_ to be out of range; see
UnixFDListExt::length().
The file descriptor is duplicated using dup() and set as
close-on-exec before being returned. You must call close() on it
when you are done.
A possible cause of failure is exceeding the per-process or system-wide file descriptor limit.
index_
the index into the list
Returns
the file descriptor, or -1 in case of error
Returns the array of file descriptors that is contained in this object.
After this call, the descriptors remain the property of self. The
caller must not close them and must not free the array. The array is
valid only until self is changed in any way.
If length is non-None then it is set to the number of file
descriptors in the returned array. The returned array is also
terminated with -1.
This function never returns None. In case there are no file
descriptors contained in self, an empty array is returned.
Returns
an array of file descriptors
Returns the array of file descriptors that is contained in this object.
After this call, the descriptors are no longer contained in
self. Further calls will return an empty list (unless more
descriptors have been added).
The return result of this function must be freed with g_free().
The caller is also responsible for closing all of the file
descriptors. The file descriptors in the array are set to
close-on-exec.
If length is non-None then it is set to the number of file
descriptors in the returned array. The returned array is also
terminated with -1.
This function never returns None. In case there are no file
descriptors contained in self, an empty array is returned.
Returns
an array of file descriptors