Function fuse::server::parse_selinux_xattr

fn parse_selinux_xattr(buf: &[u8]) -> Result<Option<&CStr>>

Parses the value of the desired attribute from the FUSE request input and returns it as an Ok(CStr). Returns Ok(None) if buf is empty or appears to be a valid request extension that does not contain any security context information.

Arguments

• buf - a byte array that contains the contents following any expected byte string parameters of the FUSE request from the server. It begins with a struct SecctxHeader, and then the subsequent entry is a struct Secctx followed by a nul-terminated string with the xattribute name and then another nul-terminated string with the value for that xattr.

Errors

• Error::InvalidHeaderLength - indicates that there is an inconsistency between the size of the data read from buf and the stated size of the SecctxHeader, the respective Secctx struct, or buf itself.
• Error::DecodeMessage - indicates that the expected structs cannot be read from buf.
• Error::MissingParameter - indicates that either a security context name or value is missing from a security context entry.