Establish 'core' library separate from 'std'.

src/libstd/linux_os.rs

@@ -0,0 +1,145 @@
+/*
+Module: os
+
+TODO: Restructure and document
+*/
+
+import ctypes::*;
+
+export libc;
+export libc_constants;
+export pipe;
+export fd_FILE;
+export close;
+export fclose;
+export waitpid;
+export getcwd;
+export exec_suffix;
+export target_os;
+export dylib_filename;
+export get_exe_path;
+export fsync_fd;
+
+// FIXME Somehow merge stuff duplicated here and macosx_os.rs. Made difficult
+// by https://github.com/graydon/rust/issues#issue/268
+
+#[link_name = ""]
+#[abi = "cdecl"]
+native mod libc {
+    fn read(fd: fd_t, buf: *u8, count: size_t) -> ssize_t;
+    fn write(fd: fd_t, buf: *u8, count: size_t) -> ssize_t;
+    fn fread(buf: *u8, size: size_t, n: size_t, f: libc::FILE) -> size_t;
+    fn fwrite(buf: *u8, size: size_t, n: size_t, f: libc::FILE) -> size_t;
+    fn open(s: str::sbuf, flags: c_int, mode: unsigned) -> fd_t;
+    fn close(fd: fd_t) -> c_int;
+    type FILE;
+    fn fopen(path: str::sbuf, mode: str::sbuf) -> FILE;
+    fn fdopen(fd: fd_t, mode: str::sbuf) -> FILE;
+    fn fclose(f: FILE);
+    fn fflush(f: FILE) -> c_int;
+    fn fsync(fd: fd_t) -> c_int;
+    fn fdatasync(fd: fd_t) -> c_int;
+    fn fileno(f: FILE) -> fd_t;
+    fn fgetc(f: FILE) -> c_int;
+    fn ungetc(c: c_int, f: FILE);
+    fn feof(f: FILE) -> c_int;
+    fn fseek(f: FILE, offset: long, whence: c_int) -> c_int;
+    fn ftell(f: FILE) -> long;
+    type dir;
+    fn opendir(d: str::sbuf) -> dir;
+    fn closedir(d: dir) -> c_int;
+    type dirent;
+    fn readdir(d: dir) -> dirent;
+    fn getenv(n: str::sbuf) -> str::sbuf;
+    fn setenv(n: str::sbuf, v: str::sbuf, overwrite: c_int) -> c_int;
+    fn unsetenv(n: str::sbuf) -> c_int;
+    fn pipe(buf: *mutable fd_t) -> c_int;
+    fn waitpid(pid: pid_t, &status: c_int, options: c_int) -> pid_t;
+    fn readlink(path: str::sbuf, buf: str::sbuf, bufsize: size_t) -> ssize_t;
+    fn mkdir(path: str::sbuf, mode: c_int) -> c_int;
+    fn rmdir(path: str::sbuf) -> c_int;
+    fn chdir(path: str::sbuf) -> c_int;
+}
+
+mod libc_constants {
+    const O_RDONLY: c_int = 0i32;
+    const O_WRONLY: c_int = 1i32;
+    const O_RDWR: c_int   = 2i32;
+    const O_APPEND: c_int = 1024i32;
+    const O_CREAT: c_int  = 64i32;
+    const O_EXCL: c_int   = 128i32;
+    const O_TRUNC: c_int  = 512i32;
+    const O_TEXT: c_int   = 0i32;     // nonexistent in linux libc
+    const O_BINARY: c_int = 0i32;     // nonexistent in linux libc
+
+    const S_IRUSR: unsigned = 256u32;
+    const S_IWUSR: unsigned = 128u32;
+}
+
+fn pipe() -> {in: fd_t, out: fd_t} {
+    let fds = {mutable in: 0i32, mutable out: 0i32};
+    assert (os::libc::pipe(ptr::mut_addr_of(fds.in)) == 0i32);
+    ret {in: fds.in, out: fds.out};
+}
+
+fn fd_FILE(fd: fd_t) -> libc::FILE {
+    ret str::as_buf("r", {|modebuf| libc::fdopen(fd, modebuf) });
+}
+
+fn close(fd: fd_t) -> c_int {
+    libc::close(fd)
+}
+
+fn fclose(file: libc::FILE) {
+    libc::fclose(file)
+}
+
+fn fsync_fd(fd: fd_t, level: io::fsync::level) -> c_int {
+    alt level {
+      io::fsync::fsync. | io::fsync::fullfsync. { ret libc::fsync(fd); }
+      io::fsync::fdatasync. { ret libc::fdatasync(fd); }
+    }
+}
+
+fn waitpid(pid: pid_t) -> i32 {
+    let status = 0i32;
+    assert (os::libc::waitpid(pid, status, 0i32) != -1i32);
+    ret status;
+}
+
+#[abi = "cdecl"]
+native mod rustrt {
+    fn rust_getcwd() -> str;
+}
+
+fn getcwd() -> str { ret rustrt::rust_getcwd(); }
+
+fn exec_suffix() -> str { ret ""; }
+
+fn target_os() -> str { ret "linux"; }
+
+fn dylib_filename(base: str) -> str { ret "lib" + base + ".so"; }
+
+/// Returns the directory containing the running program
+/// followed by a path separator
+fn get_exe_path() -> option::t<fs::path> {
+    let bufsize = 1023u;
+    let path = str::unsafe_from_bytes(vec::init_elt(0u8, bufsize));
+    ret str::as_buf("/proc/self/exe", { |proc_self_buf|
+        str::as_buf(path, { |path_buf|
+            if libc::readlink(proc_self_buf, path_buf, bufsize) != -1 {
+                option::some(fs::dirname(path) + fs::path_sep())
+            } else {
+                option::none
+            }
+        })
+    });
+}
+
+// Local Variables:
+// mode: rust;
+// fill-column: 78;
+// indent-tabs-mode: nil
+// c-basic-offset: 4
+// buffer-file-coding-system: utf-8-unix
+// End: