// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. /*! * Higher-level interfaces to libc::* functions and operating system services. * * In general these take and return rust types, use rust idioms (enums, * closures, vectors) rather than C idioms, and do more extensive safety * checks. * * This module is not meant to only contain 1:1 mappings to libc entries; any * os-interface code that is reasonably useful and broadly applicable can go * here. Including utility routines that merely build on other os code. * * We assume the general case is that users do not care, and do not want to * be made to care, which operating system they are on. While they may want * to special case various special cases -- and so we will not _hide_ the * facts of which OS the user is on -- they should be given the opportunity * to write OS-ignorant code by default. */ #[allow(missing_doc)]; use cast; use container::Container; use io; use iterator::IteratorUtil; use libc; use libc::{c_char, c_void, c_int, size_t}; use libc::FILE; use local_data; use option::{Some, None}; use os; use prelude::*; use ptr; use str; use uint; use unstable::finally::Finally; use vec; pub use libc::fclose; pub use os::consts::*; /// Delegates to the libc close() function, returning the same return value. pub fn close(fd: c_int) -> c_int { unsafe { libc::close(fd) } } pub mod rustrt { use libc::{c_char, c_int}; use libc; pub extern { unsafe fn rust_get_argc() -> c_int; unsafe fn rust_get_argv() -> **c_char; unsafe fn rust_path_is_dir(path: *libc::c_char) -> c_int; unsafe fn rust_path_exists(path: *libc::c_char) -> c_int; unsafe fn rust_set_exit_status(code: libc::intptr_t); } } pub static TMPBUF_SZ : uint = 1000u; static BUF_BYTES : uint = 2048u; pub fn getcwd() -> Path { let buf = [0 as libc::c_char, ..BUF_BYTES]; unsafe { if(0 as *libc::c_char == libc::getcwd( &buf[0], BUF_BYTES as libc::size_t)) { fail!(); } Path(str::raw::from_c_str(&buf[0])) } } // FIXME: move these to str perhaps? #2620 pub fn as_c_charp(s: &str, f: &fn(*c_char) -> T) -> T { str::as_c_str(s, |b| f(b as *c_char)) } pub fn fill_charp_buf(f: &fn(*mut c_char, size_t) -> bool) -> Option<~str> { let mut buf = vec::from_elem(TMPBUF_SZ, 0u8 as c_char); do vec::as_mut_buf(buf) |b, sz| { if f(b, sz as size_t) { unsafe { Some(str::raw::from_buf(b as *u8)) } } else { None } } } #[cfg(windows)] pub mod win32 { use libc; use vec; use str; use option::{None, Option}; use option; use os::TMPBUF_SZ; use libc::types::os::arch::extra::DWORD; pub fn fill_utf16_buf_and_decode(f: &fn(*mut u16, DWORD) -> DWORD) -> Option<~str> { unsafe { let mut n = TMPBUF_SZ as DWORD; let mut res = None; let mut done = false; while !done { let mut k: DWORD = 0; let mut buf = vec::from_elem(n as uint, 0u16); do vec::as_mut_buf(buf) |b, _sz| { k = f(b, TMPBUF_SZ as DWORD); if k == (0 as DWORD) { done = true; } else if (k == n && libc::GetLastError() == libc::ERROR_INSUFFICIENT_BUFFER as DWORD) { n *= (2 as DWORD); } else { done = true; } } if k != 0 && done { let sub = buf.slice(0, k as uint); res = option::Some(str::from_utf16(sub)); } } return res; } } pub fn as_utf16_p(s: &str, f: &fn(*u16) -> T) -> T { let mut t = s.to_utf16(); // Null terminate before passing on. t.push(0u16); vec::as_imm_buf(t, |buf, _len| f(buf)) } } /* Accessing environment variables is not generally threadsafe. Serialize access through a global lock. */ fn with_env_lock(f: &fn() -> T) -> T { use unstable::finally::Finally; unsafe { return do (|| { rust_take_env_lock(); f() }).finally { rust_drop_env_lock(); }; } extern { #[fast_ffi] fn rust_take_env_lock(); #[fast_ffi] fn rust_drop_env_lock(); } } /// Returns a vector of (variable, value) pairs for all the environment /// variables of the current process. pub fn env() -> ~[(~str,~str)] { unsafe { #[cfg(windows)] unsafe fn get_env_pairs() -> ~[~str] { use libc::funcs::extra::kernel32::{ GetEnvironmentStringsA, FreeEnvironmentStringsA }; let ch = GetEnvironmentStringsA(); if (ch as uint == 0) { fail!("os::env() failure getting env string from OS: %s", os::last_os_error()); } let mut curr_ptr: uint = ch as uint; let mut result = ~[]; while(*(curr_ptr as *libc::c_char) != 0 as libc::c_char) { let env_pair = str::raw::from_c_str( curr_ptr as *libc::c_char); result.push(env_pair); curr_ptr += libc::strlen(curr_ptr as *libc::c_char) as uint + 1; } FreeEnvironmentStringsA(ch); result } #[cfg(unix)] unsafe fn get_env_pairs() -> ~[~str] { extern { unsafe fn rust_env_pairs() -> **libc::c_char; } let environ = rust_env_pairs(); if (environ as uint == 0) { fail!("os::env() failure getting env string from OS: %s", os::last_os_error()); } let mut result = ~[]; ptr::array_each(environ, |e| { let env_pair = str::raw::from_c_str(e); debug!("get_env_pairs: %s", env_pair); result.push(env_pair); }); result } fn env_convert(input: ~[~str]) -> ~[(~str, ~str)] { let mut pairs = ~[]; for input.iter().advance |p| { let vs: ~[&str] = p.splitn_iter('=', 1).collect(); debug!("splitting: len: %u", vs.len()); assert_eq!(vs.len(), 2); pairs.push((vs[0].to_owned(), vs[1].to_owned())); } pairs } do with_env_lock { let unparsed_environ = get_env_pairs(); env_convert(unparsed_environ) } } } #[cfg(unix)] /// Fetches the environment variable `n` from the current process, returning /// None if the variable isn't set. pub fn getenv(n: &str) -> Option<~str> { unsafe { do with_env_lock { let s = str::as_c_str(n, |s| libc::getenv(s)); if ptr::null::() == cast::transmute(s) { None::<~str> } else { let s = cast::transmute(s); Some::<~str>(str::raw::from_buf(s)) } } } } #[cfg(windows)] /// Fetches the environment variable `n` from the current process, returning /// None if the variable isn't set. pub fn getenv(n: &str) -> Option<~str> { unsafe { do with_env_lock { use os::win32::{as_utf16_p, fill_utf16_buf_and_decode}; do as_utf16_p(n) |u| { do fill_utf16_buf_and_decode() |buf, sz| { libc::GetEnvironmentVariableW(u, buf, sz) } } } } } #[cfg(unix)] /// Sets the environment variable `n` to the value `v` for the currently running /// process pub fn setenv(n: &str, v: &str) { unsafe { do with_env_lock { do str::as_c_str(n) |nbuf| { do str::as_c_str(v) |vbuf| { libc::funcs::posix01::unistd::setenv(nbuf, vbuf, 1); } } } } } #[cfg(windows)] /// Sets the environment variable `n` to the value `v` for the currently running /// process pub fn setenv(n: &str, v: &str) { unsafe { do with_env_lock { use os::win32::as_utf16_p; do as_utf16_p(n) |nbuf| { do as_utf16_p(v) |vbuf| { libc::SetEnvironmentVariableW(nbuf, vbuf); } } } } } /// Remove a variable from the environment entirely pub fn unsetenv(n: &str) { #[cfg(unix)] fn _unsetenv(n: &str) { unsafe { do with_env_lock { do str::as_c_str(n) |nbuf| { libc::funcs::posix01::unistd::unsetenv(nbuf); } } } } #[cfg(windows)] fn _unsetenv(n: &str) { unsafe { do with_env_lock { use os::win32::as_utf16_p; do as_utf16_p(n) |nbuf| { libc::SetEnvironmentVariableW(nbuf, ptr::null()); } } } } _unsetenv(n); } pub fn fdopen(fd: c_int) -> *FILE { unsafe { return do as_c_charp("r") |modebuf| { libc::fdopen(fd, modebuf) }; } } // fsync related #[cfg(windows)] pub fn fsync_fd(fd: c_int, _level: io::fsync::Level) -> c_int { unsafe { use libc::funcs::extra::msvcrt::*; return commit(fd); } } #[cfg(target_os = "linux")] #[cfg(target_os = "android")] pub fn fsync_fd(fd: c_int, level: io::fsync::Level) -> c_int { unsafe { use libc::funcs::posix01::unistd::*; match level { io::fsync::FSync | io::fsync::FullFSync => return fsync(fd), io::fsync::FDataSync => return fdatasync(fd) } } } #[cfg(target_os = "macos")] pub fn fsync_fd(fd: c_int, level: io::fsync::Level) -> c_int { unsafe { use libc::consts::os::extra::*; use libc::funcs::posix88::fcntl::*; use libc::funcs::posix01::unistd::*; match level { io::fsync::FSync => return fsync(fd), _ => { // According to man fnctl, the ok retval is only specified to be // !=-1 if (fcntl(F_FULLFSYNC as c_int, fd) == -1 as c_int) { return -1 as c_int; } else { return 0 as c_int; } } } } } #[cfg(target_os = "freebsd")] pub fn fsync_fd(fd: c_int, _l: io::fsync::Level) -> c_int { unsafe { use libc::funcs::posix01::unistd::*; return fsync(fd); } } pub struct Pipe { in: c_int, out: c_int } #[cfg(unix)] pub fn pipe() -> Pipe { unsafe { let mut fds = Pipe {in: 0 as c_int, out: 0 as c_int }; assert_eq!(libc::pipe(&mut fds.in), (0 as c_int)); return Pipe {in: fds.in, out: fds.out}; } } #[cfg(windows)] pub fn pipe() -> Pipe { unsafe { // Windows pipes work subtly differently than unix pipes, and their // inheritance has to be handled in a different way that I do not // fully understand. Here we explicitly make the pipe non-inheritable, // which means to pass it to a subprocess they need to be duplicated // first, as in core::run. let mut fds = Pipe {in: 0 as c_int, out: 0 as c_int }; let res = libc::pipe(&mut fds.in, 1024 as ::libc::c_uint, (libc::O_BINARY | libc::O_NOINHERIT) as c_int); assert_eq!(res, 0 as c_int); assert!((fds.in != -1 as c_int && fds.in != 0 as c_int)); assert!((fds.out != -1 as c_int && fds.in != 0 as c_int)); return Pipe {in: fds.in, out: fds.out}; } } fn dup2(src: c_int, dst: c_int) -> c_int { unsafe { libc::dup2(src, dst) } } /// Returns the proper dll filename for the given basename of a file. pub fn dll_filename(base: &str) -> ~str { fmt!("%s%s%s", DLL_PREFIX, base, DLL_SUFFIX) } /// Optionally returns the filesystem path to the current executable which is /// running. If any failure occurs, None is returned. pub fn self_exe_path() -> Option { #[cfg(target_os = "freebsd")] fn load_self() -> Option<~str> { unsafe { use libc::funcs::bsd44::*; use libc::consts::os::extra::*; do fill_charp_buf() |buf, sz| { let mib = ~[CTL_KERN as c_int, KERN_PROC as c_int, KERN_PROC_PATHNAME as c_int, -1 as c_int]; let mut sz = sz; sysctl(vec::raw::to_ptr(mib), mib.len() as ::libc::c_uint, buf as *mut c_void, &mut sz, ptr::null(), 0u as size_t) == (0 as c_int) } } } #[cfg(target_os = "linux")] #[cfg(target_os = "android")] fn load_self() -> Option<~str> { unsafe { use libc::funcs::posix01::unistd::readlink; let mut path_str = str::with_capacity(TMPBUF_SZ); let len = do str::as_c_str(path_str) |buf| { let buf = buf as *mut c_char; do as_c_charp("/proc/self/exe") |proc_self_buf| { readlink(proc_self_buf, buf, TMPBUF_SZ as size_t) } }; if len == -1 { None } else { str::raw::set_len(&mut path_str, len as uint); Some(path_str) } } } #[cfg(target_os = "macos")] fn load_self() -> Option<~str> { unsafe { do fill_charp_buf() |buf, sz| { let mut sz = sz as u32; libc::funcs::extra::_NSGetExecutablePath( buf, &mut sz) == (0 as c_int) } } } #[cfg(windows)] fn load_self() -> Option<~str> { unsafe { use os::win32::fill_utf16_buf_and_decode; do fill_utf16_buf_and_decode() |buf, sz| { libc::GetModuleFileNameW(0u as libc::DWORD, buf, sz) } } } do load_self().map |pth| { Path(*pth).dir_path() } } /** * Returns the path to the user's home directory, if known. * * On Unix, returns the value of the 'HOME' environment variable if it is set * and not equal to the empty string. * * On Windows, returns the value of the 'HOME' environment variable if it is * set and not equal to the empty string. Otherwise, returns the value of the * 'USERPROFILE' environment variable if it is set and not equal to the empty * string. * * Otherwise, homedir returns option::none. */ pub fn homedir() -> Option { return match getenv("HOME") { Some(ref p) => if !p.is_empty() { Some(Path(*p)) } else { secondary() }, None => secondary() }; #[cfg(unix)] fn secondary() -> Option { None } #[cfg(windows)] fn secondary() -> Option { do getenv("USERPROFILE").chain |p| { if !p.is_empty() { Some(Path(p)) } else { None } } } } /** * Returns the path to a temporary directory. * * On Unix, returns the value of the 'TMPDIR' environment variable if it is * set and non-empty and '/tmp' otherwise. * * On Windows, returns the value of, in order, the 'TMP', 'TEMP', * 'USERPROFILE' environment variable if any are set and not the empty * string. Otherwise, tmpdir returns the path to the Windows directory. */ pub fn tmpdir() -> Path { return lookup(); fn getenv_nonempty(v: &str) -> Option { match getenv(v) { Some(x) => if x.is_empty() { None } else { Some(Path(x)) }, _ => None } } #[cfg(unix)] #[allow(non_implicitly_copyable_typarams)] fn lookup() -> Path { getenv_nonempty("TMPDIR").get_or_default(Path("/tmp")) } #[cfg(windows)] #[allow(non_implicitly_copyable_typarams)] fn lookup() -> Path { getenv_nonempty("TMP").or( getenv_nonempty("TEMP").or( getenv_nonempty("USERPROFILE").or( getenv_nonempty("WINDIR")))).get_or_default(Path("C:\\Windows")) } } /// Recursively walk a directory structure pub fn walk_dir(p: &Path, f: &fn(&Path) -> bool) -> bool { let r = list_dir(p); r.iter().advance(|q| { let path = &p.push(*q); f(path) && (!path_is_dir(path) || walk_dir(path, |p| f(p))) }) } /// Indicates whether a path represents a directory pub fn path_is_dir(p: &Path) -> bool { unsafe { do str::as_c_str(p.to_str()) |buf| { rustrt::rust_path_is_dir(buf) != 0 as c_int } } } /// Indicates whether a path exists pub fn path_exists(p: &Path) -> bool { unsafe { do str::as_c_str(p.to_str()) |buf| { rustrt::rust_path_exists(buf) != 0 as c_int } } } /** * Convert a relative path to an absolute path * * If the given path is relative, return it prepended with the current working * directory. If the given path is already an absolute path, return it * as is. */ // NB: this is here rather than in path because it is a form of environment // querying; what it does depends on the process working directory, not just // the input paths. pub fn make_absolute(p: &Path) -> Path { if p.is_absolute { copy *p } else { getcwd().push_many(p.components) } } /// Creates a directory at the specified path pub fn make_dir(p: &Path, mode: c_int) -> bool { return mkdir(p, mode); #[cfg(windows)] fn mkdir(p: &Path, _mode: c_int) -> bool { unsafe { use os::win32::as_utf16_p; // FIXME: turn mode into something useful? #2623 do as_utf16_p(p.to_str()) |buf| { libc::CreateDirectoryW(buf, cast::transmute(0)) != (0 as libc::BOOL) } } } #[cfg(unix)] fn mkdir(p: &Path, mode: c_int) -> bool { unsafe { do as_c_charp(p.to_str()) |c| { libc::mkdir(c, mode as libc::mode_t) == (0 as c_int) } } } } /// Creates a directory with a given mode. /// Returns true iff creation /// succeeded. Also creates all intermediate subdirectories /// if they don't already exist, giving all of them the same mode. // tjc: if directory exists but with different permissions, // should we return false? pub fn mkdir_recursive(p: &Path, mode: c_int) -> bool { if path_is_dir(p) { return true; } else if p.components.is_empty() { return false; } else if p.components.len() == 1 { // No parent directories to create path_is_dir(p) || make_dir(p, mode) } else { mkdir_recursive(&p.pop(), mode) && make_dir(p, mode) } } /// Lists the contents of a directory #[allow(non_implicitly_copyable_typarams)] pub fn list_dir(p: &Path) -> ~[~str] { if p.components.is_empty() && !p.is_absolute() { // Not sure what the right behavior is here, but this // prevents a bounds check failure later return ~[]; } unsafe { #[cfg(target_os = "linux")] #[cfg(target_os = "android")] #[cfg(target_os = "freebsd")] #[cfg(target_os = "macos")] unsafe fn get_list(p: &Path) -> ~[~str] { use libc::{dirent_t}; use libc::{opendir, readdir, closedir}; extern { unsafe fn rust_list_dir_val(ptr: *dirent_t) -> *libc::c_char; } let input = p.to_str(); let mut strings = ~[]; let input_ptr = ::cast::transmute(&input[0]); debug!("os::list_dir -- BEFORE OPENDIR"); let dir_ptr = opendir(input_ptr); if (dir_ptr as uint != 0) { debug!("os::list_dir -- opendir() SUCCESS"); let mut entry_ptr = readdir(dir_ptr); while (entry_ptr as uint != 0) { strings.push(str::raw::from_c_str(rust_list_dir_val( entry_ptr))); entry_ptr = readdir(dir_ptr); } closedir(dir_ptr); } else { debug!("os::list_dir -- opendir() FAILURE"); } debug!( "os::list_dir -- AFTER -- #: %?", strings.len()); strings } #[cfg(windows)] unsafe fn get_list(p: &Path) -> ~[~str] { use libc::consts::os::extra::INVALID_HANDLE_VALUE; use libc::wcslen; use libc::funcs::extra::kernel32::{ FindFirstFileW, FindNextFileW, FindClose, }; use os::win32::{ as_utf16_p }; use rt::global_heap::{malloc_raw, free_raw}; #[nolink] extern { unsafe fn rust_list_dir_wfd_size() -> libc::size_t; unsafe fn rust_list_dir_wfd_fp_buf(wfd: *libc::c_void) -> *u16; } fn star(p: &Path) -> Path { p.push("*") } do as_utf16_p(star(p).to_str()) |path_ptr| { let mut strings = ~[]; let wfd_ptr = malloc_raw(rust_list_dir_wfd_size() as uint); let find_handle = FindFirstFileW( path_ptr, ::cast::transmute(wfd_ptr)); if find_handle as libc::c_int != INVALID_HANDLE_VALUE { let mut more_files = 1 as libc::c_int; while more_files != 0 { let fp_buf = rust_list_dir_wfd_fp_buf(wfd_ptr); if fp_buf as uint == 0 { fail!("os::list_dir() failure: got null ptr from wfd"); } else { let fp_vec = vec::from_buf( fp_buf, wcslen(fp_buf) as uint); let fp_str = str::from_utf16(fp_vec); strings.push(fp_str); } more_files = FindNextFileW( find_handle, ::cast::transmute(wfd_ptr)); } FindClose(find_handle); free_raw(wfd_ptr); } strings } } do get_list(p).filtered |filename| { *filename != ~"." && *filename != ~".." } } } /** * Lists the contents of a directory * * This version prepends each entry with the directory. */ pub fn list_dir_path(p: &Path) -> ~[~Path] { list_dir(p).map(|f| ~p.push(*f)) } /// Removes a directory at the specified path, after removing /// all its contents. Use carefully! pub fn remove_dir_recursive(p: &Path) -> bool { let mut error_happened = false; for walk_dir(p) |inner| { if !error_happened { if path_is_dir(inner) { if !remove_dir_recursive(inner) { error_happened = true; } } else { if !remove_file(inner) { error_happened = true; } } } }; // Directory should now be empty !error_happened && remove_dir(p) } /// Removes a directory at the specified path pub fn remove_dir(p: &Path) -> bool { return rmdir(p); #[cfg(windows)] fn rmdir(p: &Path) -> bool { unsafe { use os::win32::as_utf16_p; return do as_utf16_p(p.to_str()) |buf| { libc::RemoveDirectoryW(buf) != (0 as libc::BOOL) }; } } #[cfg(unix)] fn rmdir(p: &Path) -> bool { unsafe { return do as_c_charp(p.to_str()) |buf| { libc::rmdir(buf) == (0 as c_int) }; } } } /// Changes the current working directory to the specified path, returning /// whether the change was completed successfully or not. pub fn change_dir(p: &Path) -> bool { return chdir(p); #[cfg(windows)] fn chdir(p: &Path) -> bool { unsafe { use os::win32::as_utf16_p; return do as_utf16_p(p.to_str()) |buf| { libc::SetCurrentDirectoryW(buf) != (0 as libc::BOOL) }; } } #[cfg(unix)] fn chdir(p: &Path) -> bool { unsafe { return do as_c_charp(p.to_str()) |buf| { libc::chdir(buf) == (0 as c_int) }; } } } /// Changes the current working directory to the specified /// path while acquiring a global lock, then calls `action`. /// If the change is successful, releases the lock and restores the /// CWD to what it was before, returning true. /// Returns false if the directory doesn't exist or if the directory change /// is otherwise unsuccessful. pub fn change_dir_locked(p: &Path, action: &fn()) -> bool { use unstable::global::global_data_clone_create; use unstable::sync::{Exclusive, exclusive}; fn key(_: Exclusive<()>) { } unsafe { let result = global_data_clone_create(key, || { ~exclusive(()) }); do result.with_imm() |_| { let old_dir = os::getcwd(); if change_dir(p) { action(); change_dir(&old_dir) } else { false } } } } /// Copies a file from one location to another pub fn copy_file(from: &Path, to: &Path) -> bool { return do_copy_file(from, to); #[cfg(windows)] fn do_copy_file(from: &Path, to: &Path) -> bool { unsafe { use os::win32::as_utf16_p; return do as_utf16_p(from.to_str()) |fromp| { do as_utf16_p(to.to_str()) |top| { libc::CopyFileW(fromp, top, (0 as libc::BOOL)) != (0 as libc::BOOL) } } } } #[cfg(unix)] fn do_copy_file(from: &Path, to: &Path) -> bool { unsafe { let istream = do as_c_charp(from.to_str()) |fromp| { do as_c_charp("rb") |modebuf| { libc::fopen(fromp, modebuf) } }; if istream as uint == 0u { return false; } // Preserve permissions let from_mode = from.get_mode().expect("copy_file: couldn't get permissions \ for source file"); let ostream = do as_c_charp(to.to_str()) |top| { do as_c_charp("w+b") |modebuf| { libc::fopen(top, modebuf) } }; if ostream as uint == 0u { fclose(istream); return false; } let bufsize = 8192u; let mut buf = vec::with_capacity::(bufsize); let mut done = false; let mut ok = true; while !done { do vec::as_mut_buf(buf) |b, _sz| { let nread = libc::fread(b as *mut c_void, 1u as size_t, bufsize as size_t, istream); if nread > 0 as size_t { if libc::fwrite(b as *c_void, 1u as size_t, nread, ostream) != nread { ok = false; done = true; } } else { done = true; } } } fclose(istream); fclose(ostream); // Give the new file the old file's permissions if do str::as_c_str(to.to_str()) |to_buf| { libc::chmod(to_buf, from_mode as libc::mode_t) } != 0 { return false; // should be a condition... } return ok; } } } /// Deletes an existing file pub fn remove_file(p: &Path) -> bool { return unlink(p); #[cfg(windows)] fn unlink(p: &Path) -> bool { unsafe { use os::win32::as_utf16_p; return do as_utf16_p(p.to_str()) |buf| { libc::DeleteFileW(buf) != (0 as libc::BOOL) }; } } #[cfg(unix)] fn unlink(p: &Path) -> bool { unsafe { return do as_c_charp(p.to_str()) |buf| { libc::unlink(buf) == (0 as c_int) }; } } } #[cfg(unix)] /// Returns the platform-specific value of errno pub fn errno() -> int { #[cfg(target_os = "macos")] #[cfg(target_os = "freebsd")] fn errno_location() -> *c_int { #[nolink] extern { unsafe fn __error() -> *c_int; } unsafe { __error() } } #[cfg(target_os = "linux")] #[cfg(target_os = "android")] fn errno_location() -> *c_int { #[nolink] extern { unsafe fn __errno_location() -> *c_int; } unsafe { __errno_location() } } unsafe { (*errno_location()) as int } } #[cfg(windows)] /// Returns the platform-specific value of errno pub fn errno() -> uint { use libc::types::os::arch::extra::DWORD; #[link_name = "kernel32"] #[abi = "stdcall"] extern "stdcall" { unsafe fn GetLastError() -> DWORD; } unsafe { GetLastError() as uint } } /// Get a string representing the platform-dependent last error pub fn last_os_error() -> ~str { #[cfg(unix)] fn strerror() -> ~str { #[cfg(target_os = "macos")] #[cfg(target_os = "android")] #[cfg(target_os = "freebsd")] fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: size_t) -> c_int { #[nolink] extern { unsafe fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: size_t) -> c_int; } unsafe { strerror_r(errnum, buf, buflen) } } // GNU libc provides a non-compliant version of strerror_r by default // and requires macros to instead use the POSIX compliant variant. // So we just use __xpg_strerror_r which is always POSIX compliant #[cfg(target_os = "linux")] fn strerror_r(errnum: c_int, buf: *mut c_char, buflen: size_t) -> c_int { #[nolink] extern { unsafe fn __xpg_strerror_r(errnum: c_int, buf: *mut c_char, buflen: size_t) -> c_int; } unsafe { __xpg_strerror_r(errnum, buf, buflen) } } let mut buf = [0 as c_char, ..TMPBUF_SZ]; unsafe { let err = strerror_r(errno() as c_int, &mut buf[0], TMPBUF_SZ as size_t); if err < 0 { fail!("strerror_r failure"); } str::raw::from_c_str(&buf[0]) } } #[cfg(windows)] fn strerror() -> ~str { use libc::types::os::arch::extra::DWORD; use libc::types::os::arch::extra::LPSTR; use libc::types::os::arch::extra::LPVOID; #[link_name = "kernel32"] #[abi = "stdcall"] extern "stdcall" { unsafe fn FormatMessageA(flags: DWORD, lpSrc: LPVOID, msgId: DWORD, langId: DWORD, buf: LPSTR, nsize: DWORD, args: *c_void) -> DWORD; } static FORMAT_MESSAGE_FROM_SYSTEM: DWORD = 0x00001000; static FORMAT_MESSAGE_IGNORE_INSERTS: DWORD = 0x00000200; let mut buf = [0 as c_char, ..TMPBUF_SZ]; // This value is calculated from the macro // MAKELANGID(LANG_SYSTEM_DEFAULT, SUBLANG_SYS_DEFAULT) let langId = 0x0800 as DWORD; let err = errno() as DWORD; unsafe { let res = FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, ptr::mut_null(), err, langId, &mut buf[0], TMPBUF_SZ as DWORD, ptr::null()); if res == 0 { fail!("[%?] FormatMessage failure", errno()); } str::raw::from_c_str(&buf[0]) } } strerror() } /** * Sets the process exit code * * Sets the exit code returned by the process if all supervised tasks * terminate successfully (without failing). If the current root task fails * and is supervised by the scheduler then any user-specified exit status is * ignored and the process exits with the default failure status */ pub fn set_exit_status(code: int) { unsafe { rustrt::rust_set_exit_status(code as libc::intptr_t); } } unsafe fn load_argc_and_argv(argc: c_int, argv: **c_char) -> ~[~str] { let mut args = ~[]; for uint::range(0, argc as uint) |i| { args.push(str::raw::from_c_str(*argv.offset(i))); } args } /** * Returns the command line arguments * * Returns a list of the command line arguments. */ #[cfg(target_os = "macos")] pub fn real_args() -> ~[~str] { unsafe { let (argc, argv) = (*_NSGetArgc() as c_int, *_NSGetArgv() as **c_char); load_argc_and_argv(argc, argv) } } #[cfg(target_os = "linux")] #[cfg(target_os = "android")] #[cfg(target_os = "freebsd")] pub fn real_args() -> ~[~str] { unsafe { let argc = rustrt::rust_get_argc(); let argv = rustrt::rust_get_argv(); load_argc_and_argv(argc, argv) } } #[cfg(windows)] pub fn real_args() -> ~[~str] { let mut nArgs: c_int = 0; let lpArgCount: *mut c_int = &mut nArgs; let lpCmdLine = unsafe { GetCommandLineW() }; let szArgList = unsafe { CommandLineToArgvW(lpCmdLine, lpArgCount) }; let mut args = ~[]; for uint::range(0, nArgs as uint) |i| { unsafe { // Determine the length of this argument. let ptr = *szArgList.offset(i); let mut len = 0; while *ptr.offset(len) != 0 { len += 1; } // Push it onto the list. args.push(vec::raw::buf_as_slice(ptr, len, str::from_utf16)); } } unsafe { LocalFree(cast::transmute(szArgList)); } return args; } type LPCWSTR = *u16; #[cfg(windows)] #[link_name="kernel32"] #[abi="stdcall"] extern "stdcall" { fn GetCommandLineW() -> LPCWSTR; fn LocalFree(ptr: *c_void); } #[cfg(windows)] #[link_name="shell32"] #[abi="stdcall"] extern "stdcall" { fn CommandLineToArgvW(lpCmdLine: LPCWSTR, pNumArgs: *mut c_int) -> **u16; } struct OverriddenArgs { val: ~[~str] } fn overridden_arg_key(_v: @OverriddenArgs) {} /// Returns the arguments which this program was started with (normally passed /// via the command line). /// /// The return value of the function can be changed by invoking the /// `os::set_args` function. pub fn args() -> ~[~str] { unsafe { match local_data::local_data_get(overridden_arg_key) { None => real_args(), Some(args) => copy args.val } } } /// For the current task, overrides the task-local cache of the arguments this /// program had when it started. These new arguments are only available to the /// current task via the `os::args` method. pub fn set_args(new_args: ~[~str]) { unsafe { let overridden_args = @OverriddenArgs { val: copy new_args }; local_data::local_data_set(overridden_arg_key, overridden_args); } } // FIXME #6100 we should really use an internal implementation of this - using // the POSIX glob functions isn't portable to windows, probably has slight // inconsistencies even where it is implemented, and makes extending // functionality a lot more difficult // FIXME #6101 also provide a non-allocating version - each_glob or so? /// Returns a vector of Path objects that match the given glob pattern #[cfg(target_os = "linux")] #[cfg(target_os = "android")] #[cfg(target_os = "freebsd")] #[cfg(target_os = "macos")] pub fn glob(pattern: &str) -> ~[Path] { #[cfg(target_os = "linux")] #[cfg(target_os = "android")] fn default_glob_t () -> libc::glob_t { libc::glob_t { gl_pathc: 0, gl_pathv: ptr::null(), gl_offs: 0, __unused1: ptr::null(), __unused2: ptr::null(), __unused3: ptr::null(), __unused4: ptr::null(), __unused5: ptr::null(), } } #[cfg(target_os = "freebsd")] fn default_glob_t () -> libc::glob_t { libc::glob_t { gl_pathc: 0, __unused1: 0, gl_offs: 0, __unused2: 0, gl_pathv: ptr::null(), __unused3: ptr::null(), __unused4: ptr::null(), __unused5: ptr::null(), __unused6: ptr::null(), __unused7: ptr::null(), __unused8: ptr::null(), } } #[cfg(target_os = "macos")] fn default_glob_t () -> libc::glob_t { libc::glob_t { gl_pathc: 0, __unused1: 0, gl_offs: 0, __unused2: 0, gl_pathv: ptr::null(), __unused3: ptr::null(), __unused4: ptr::null(), __unused5: ptr::null(), __unused6: ptr::null(), __unused7: ptr::null(), __unused8: ptr::null(), } } let mut g = default_glob_t(); do str::as_c_str(pattern) |c_pattern| { unsafe { libc::glob(c_pattern, 0, ptr::null(), &mut g) } }; do(|| { let paths = unsafe { vec::raw::from_buf_raw(g.gl_pathv, g.gl_pathc as uint) }; do paths.map |&c_str| { Path(unsafe { str::raw::from_c_str(c_str) }) } }).finally { unsafe { libc::globfree(&mut g) }; } } /// Returns a vector of Path objects that match the given glob pattern #[cfg(target_os = "win32")] pub fn glob(_pattern: &str) -> ~[Path] { fail!("glob() is unimplemented on Windows") } #[cfg(target_os = "macos")] extern { // These functions are in crt_externs.h. pub fn _NSGetArgc() -> *c_int; pub fn _NSGetArgv() -> ***c_char; } pub mod consts { #[cfg(unix)] pub use os::consts::unix::*; #[cfg(windows)] pub use os::consts::windows::*; #[cfg(target_os = "macos")] pub use os::consts::macos::*; #[cfg(target_os = "freebsd")] pub use os::consts::freebsd::*; #[cfg(target_os = "linux")] pub use os::consts::linux::*; #[cfg(target_os = "android")] pub use os::consts::android::*; #[cfg(target_os = "win32")] pub use os::consts::win32::*; #[cfg(target_arch = "x86")] pub use os::consts::x86::*; #[cfg(target_arch = "x86_64")] pub use os::consts::x86_64::*; #[cfg(target_arch = "arm")] pub use os::consts::arm::*; #[cfg(target_arch = "mips")] use os::consts::mips::*; pub mod unix { pub static FAMILY: &'static str = "unix"; } pub mod windows { pub static FAMILY: &'static str = "windows"; } pub mod macos { pub static SYSNAME: &'static str = "macos"; pub static DLL_PREFIX: &'static str = "lib"; pub static DLL_SUFFIX: &'static str = ".dylib"; pub static EXE_SUFFIX: &'static str = ""; } pub mod freebsd { pub static SYSNAME: &'static str = "freebsd"; pub static DLL_PREFIX: &'static str = "lib"; pub static DLL_SUFFIX: &'static str = ".so"; pub static EXE_SUFFIX: &'static str = ""; } pub mod linux { pub static SYSNAME: &'static str = "linux"; pub static DLL_PREFIX: &'static str = "lib"; pub static DLL_SUFFIX: &'static str = ".so"; pub static EXE_SUFFIX: &'static str = ""; } pub mod android { pub static SYSNAME: &'static str = "android"; pub static DLL_PREFIX: &'static str = "lib"; pub static DLL_SUFFIX: &'static str = ".so"; pub static EXE_SUFFIX: &'static str = ""; } pub mod win32 { pub static SYSNAME: &'static str = "win32"; pub static DLL_PREFIX: &'static str = ""; pub static DLL_SUFFIX: &'static str = ".dll"; pub static EXE_SUFFIX: &'static str = ".exe"; } pub mod x86 { pub static ARCH: &'static str = "x86"; } pub mod x86_64 { pub static ARCH: &'static str = "x86_64"; } pub mod arm { pub static ARCH: &'static str = "arm"; } pub mod mips { pub static ARCH: &'static str = "mips"; } } #[cfg(test)] #[allow(non_implicitly_copyable_typarams)] mod tests { use libc::{c_int, c_void, size_t}; use libc; use option::Some; use option; use os::{as_c_charp, env, getcwd, getenv, make_absolute, real_args}; use os::{remove_file, setenv, unsetenv}; use os; use path::Path; use rand::RngUtil; use rand; use run; use str::StrSlice; use vec; use vec::CopyableVector; use libc::consts::os::posix88::{S_IRUSR, S_IWUSR, S_IXUSR}; #[test] pub fn last_os_error() { debug!(os::last_os_error()); } #[test] pub fn test_args() { let a = real_args(); assert!(a.len() >= 1); } fn make_rand_name() -> ~str { let mut rng = rand::rng(); let n = ~"TEST" + rng.gen_str(10u); assert!(getenv(n).is_none()); n } #[test] fn test_setenv() { let n = make_rand_name(); setenv(n, "VALUE"); assert_eq!(getenv(n), option::Some(~"VALUE")); } #[test] fn test_unsetenv() { let n = make_rand_name(); setenv(n, "VALUE"); unsetenv(n); assert_eq!(getenv(n), option::None); } #[test] #[ignore(cfg(windows))] #[ignore] fn test_setenv_overwrite() { let n = make_rand_name(); setenv(n, "1"); setenv(n, "2"); assert_eq!(getenv(n), option::Some(~"2")); setenv(n, ""); assert_eq!(getenv(n), option::Some(~"")); } // Windows GetEnvironmentVariable requires some extra work to make sure // the buffer the variable is copied into is the right size #[test] #[ignore(cfg(windows))] #[ignore] fn test_getenv_big() { let mut s = ~""; let mut i = 0; while i < 100 { s = s + "aaaaaaaaaa"; i += 1; } let n = make_rand_name(); setenv(n, s); debug!(copy s); assert_eq!(getenv(n), option::Some(s)); } #[test] fn test_self_exe_path() { let path = os::self_exe_path(); assert!(path.is_some()); let path = path.get(); debug!(copy path); // Hard to test this function assert!(path.is_absolute); } #[test] #[ignore] fn test_env_getenv() { let e = env(); assert!(e.len() > 0u); for e.iter().advance |p| { let (n, v) = copy *p; debug!(copy n); let v2 = getenv(n); // MingW seems to set some funky environment variables like // "=C:=C:\MinGW\msys\1.0\bin" and "!::=::\" that are returned // from env() but not visible from getenv(). assert!(v2.is_none() || v2 == option::Some(v)); } } #[test] fn test_env_setenv() { let n = make_rand_name(); let mut e = env(); setenv(n, "VALUE"); assert!(!e.contains(&(copy n, ~"VALUE"))); e = env(); assert!(e.contains(&(n, ~"VALUE"))); } #[test] fn test() { assert!((!Path("test-path").is_absolute)); debug!("Current working directory: %s", getcwd().to_str()); debug!(make_absolute(&Path("test-path"))); debug!(make_absolute(&Path("/usr/bin"))); } #[test] #[cfg(unix)] fn homedir() { let oldhome = getenv("HOME"); setenv("HOME", "/home/MountainView"); assert_eq!(os::homedir(), Some(Path("/home/MountainView"))); setenv("HOME", ""); assert!(os::homedir().is_none()); for oldhome.iter().advance |s| { setenv("HOME", *s) } } #[test] #[cfg(windows)] fn homedir() { let oldhome = getenv("HOME"); let olduserprofile = getenv("USERPROFILE"); setenv("HOME", ""); setenv("USERPROFILE", ""); assert!(os::homedir().is_none()); setenv("HOME", "/home/MountainView"); assert_eq!(os::homedir(), Some(Path("/home/MountainView"))); setenv("HOME", ""); setenv("USERPROFILE", "/home/MountainView"); assert_eq!(os::homedir(), Some(Path("/home/MountainView"))); setenv("HOME", "/home/MountainView"); setenv("USERPROFILE", "/home/PaloAlto"); assert_eq!(os::homedir(), Some(Path("/home/MountainView"))); oldhome.iter().advance(|s| { setenv("HOME", *s); true }); olduserprofile.iter().advance(|s| { setenv("USERPROFILE", *s); true }); } #[test] fn tmpdir() { assert!(!os::tmpdir().to_str().is_empty()); } // Issue #712 #[test] fn test_list_dir_no_invalid_memory_access() { os::list_dir(&Path(".")); } #[test] fn list_dir() { let dirs = os::list_dir(&Path(".")); // Just assuming that we've got some contents in the current directory assert!(dirs.len() > 0u); for dirs.iter().advance |dir| { debug!(copy *dir); } } #[test] fn list_dir_empty_path() { let dirs = os::list_dir(&Path("")); assert!(dirs.is_empty()); } #[test] #[cfg(not(windows))] fn list_dir_root() { let dirs = os::list_dir(&Path("/")); assert!(dirs.len() > 1); } #[test] #[cfg(windows)] fn list_dir_root() { let dirs = os::list_dir(&Path("C:\\")); assert!(dirs.len() > 1); } #[test] fn path_is_dir() { assert!((os::path_is_dir(&Path(".")))); assert!((!os::path_is_dir(&Path("test/stdtest/fs.rs")))); } #[test] fn path_exists() { assert!((os::path_exists(&Path(".")))); assert!((!os::path_exists(&Path( "test/nonexistent-bogus-path")))); } #[test] fn copy_file_does_not_exist() { assert!(!os::copy_file(&Path("test/nonexistent-bogus-path"), &Path("test/other-bogus-path"))); assert!(!os::path_exists(&Path("test/other-bogus-path"))); } #[test] fn copy_file_ok() { unsafe { let tempdir = getcwd(); // would like to use $TMPDIR, // doesn't seem to work on Linux assert!((tempdir.to_str().len() > 0u)); let in = tempdir.push("in.txt"); let out = tempdir.push("out.txt"); /* Write the temp input file */ let ostream = do as_c_charp(in.to_str()) |fromp| { do as_c_charp("w+b") |modebuf| { libc::fopen(fromp, modebuf) } }; assert!((ostream as uint != 0u)); let s = ~"hello"; let mut buf = s.as_bytes_with_null().to_owned(); let len = buf.len(); do vec::as_mut_buf(buf) |b, _len| { assert_eq!(libc::fwrite(b as *c_void, 1u as size_t, (s.len() + 1u) as size_t, ostream), len as size_t) } assert_eq!(libc::fclose(ostream), (0u as c_int)); let in_mode = in.get_mode(); let rs = os::copy_file(&in, &out); if (!os::path_exists(&in)) { fail!("%s doesn't exist", in.to_str()); } assert!((rs)); let rslt = run::process_status("diff", [in.to_str(), out.to_str()]); assert_eq!(rslt, 0); assert_eq!(out.get_mode(), in_mode); assert!((remove_file(&in))); assert!((remove_file(&out))); } } #[test] fn recursive_mkdir_slash() { let path = Path("/"); assert!(os::mkdir_recursive(&path, (S_IRUSR | S_IWUSR | S_IXUSR) as i32)); } #[test] fn recursive_mkdir_empty() { let path = Path(""); assert!(!os::mkdir_recursive(&path, (S_IRUSR | S_IWUSR | S_IXUSR) as i32)); } // More recursive_mkdir tests are in extra::tempfile }