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use std::fs::read_link;
pub(crate) fn get_timezone_inner() -> Result<String, crate::GetTimezoneError> {
// This is a backport of the Linux implementation.
// NetBSDs is less than thorough how the softlink should be set up.
const PREFIXES: &[&str] = &[
"/usr/share/zoneinfo/", // absolute path
"../usr/share/zoneinfo/", // relative path
];
let mut s = read_link("/etc/localtime")?
.into_os_string()
.into_string()
.map_err(|_| crate::GetTimezoneError::FailedParsingString)?;
for &prefix in PREFIXES {
if s.starts_with(prefix) {
// Trim to the correct length without allocating.
s.replace_range(..prefix.len(), "");
return Ok(s);
}
}
Err(crate::GetTimezoneError::FailedParsingString)
}