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/*
Module: generic_os
Some miscellaneous platform functions.
These should be rolled into another module.
*/
import core::option;
// Wow, this is an ugly way to write doc comments
#[cfg(bogus)]
/*
Function: getenv
Get the value of an environment variable
*/
fn getenv(n: str) -> option::t<str> { }
#[cfg(bogus)]
/*
Function: setenv
Set the value of an environment variable
*/
fn setenv(n: str, v: str) { }
#[cfg(target_os = "linux")]
#[cfg(target_os = "macos")]
#[cfg(target_os = "freebsd")]
fn getenv(n: str) -> option::t<str> unsafe {
let s = str::as_buf(n, {|buf| os::libc::getenv(buf) });
ret if unsafe::reinterpret_cast(s) == 0 {
option::none::<str>
} else {
let s = unsafe::reinterpret_cast(s);
option::some::<str>(str::from_cstr(s))
};
}
#[cfg(target_os = "linux")]
#[cfg(target_os = "macos")]
#[cfg(target_os = "freebsd")]
fn setenv(n: str, v: str) {
// FIXME (868)
str::as_buf(
n,
// FIXME (868)
{|nbuf|
str::as_buf(
v,
{|vbuf|
os::libc::setenv(nbuf, vbuf, 1i32)})});
}
#[cfg(target_os = "win32")]
fn getenv(n: str) -> option::t<str> {
let nsize = 256u;
while true {
let v: [u8] = [];
vec::reserve(v, nsize);
let res =
str::as_buf(n,
{|nbuf|
unsafe {
let vbuf = vec::to_ptr(v);
os::kernel32::GetEnvironmentVariableA(nbuf, vbuf,
nsize)
}
});
if res == 0u {
ret option::none;
} else if res < nsize {
unsafe {
vec::unsafe::set_len(v, res);
}
ret option::some(str::unsafe_from_bytes(v));
} else { nsize = res; }
}
fail;
}
#[cfg(target_os = "win32")]
fn setenv(n: str, v: str) {
// FIXME (868)
let _: () =
str::as_buf(n, {|nbuf|
let _: () =
str::as_buf(v, {|vbuf|
os::kernel32::SetEnvironmentVariableA(nbuf, vbuf);
});
});
}
#[cfg(test)]
mod tests {
#[test]
#[ignore(reason = "fails periodically on mac")]
fn test_setenv() {
// NB: Each test of setenv needs to use different variable names or
// the tests will not be threadsafe
setenv("NAME1", "VALUE");
assert (getenv("NAME1") == option::some("VALUE"));
}
#[test]
#[ignore(reason = "fails periodically on mac")]
fn test_setenv_overwrite() {
setenv("NAME2", "1");
setenv("NAME2", "2");
assert (getenv("NAME2") == option::some("2"));
}
// Windows GetEnvironmentVariable requires some extra work to make sure
// the buffer the variable is copied into is the right size
#[test]
#[ignore(reason = "fails periodically on mac")]
fn test_getenv_big() {
let s = "";
let i = 0;
while i < 100 { s += "aaaaaaaaaa"; i += 1; }
setenv("test_getenv_big", s);
log(debug, s);
assert (getenv("test_getenv_big") == option::some(s));
}
#[test]
fn test_get_exe_path() {
let path = os::get_exe_path();
assert option::is_some(path);
let path = option::get(path);
log(debug, path);
// Hard to test this function
if os::target_os() != "win32" {
assert str::starts_with(path, fs::path_sep());
} else {
assert path[1] == ':' as u8;
}
}
}
// Local Variables:
// mode: rust;
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// End:
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