rust/src/lib/linux_os.rs

import _str.sbuf;
import _vec.vbuf;

native mod libc = "libc.so.6" {

  fn open(sbuf s, int flags, uint mode) -> int;
  fn read(int fd, vbuf buf, uint count) -> int;
  fn write(int fd, vbuf buf, uint count) -> int;
  fn close(int fd) -> int;

  type FILE;
  fn fopen(sbuf path, sbuf mode) -> FILE;
  fn fclose(FILE f);
  fn fgetc(FILE f) -> int;
  fn ungetc(int c, FILE f);

  type dir;
  // readdir is a mess; handle via wrapper function in rustrt.
  fn opendir(sbuf d) -> dir;
  fn closedir(dir d) -> int;

  fn getenv(sbuf n) -> sbuf;
  fn setenv(sbuf n, sbuf v, int overwrite) -> int;
  fn unsetenv(sbuf n) -> int;
}

mod libc_constants {
  fn O_RDONLY() -> int { ret 0x0000; }
  fn O_WRONLY() -> int { ret 0x0001; }
  fn O_RDWR()   -> int { ret 0x0002; }
  fn O_APPEND() -> int { ret 0x0400; }
  fn O_CREAT()  -> int { ret 0x0040; }
  fn O_EXCL()   -> int { ret 0x0080; }
  fn O_TRUNC()  -> int { ret 0x0200; }
  fn O_TEXT()   -> int { ret 0x0000; } // nonexistent in linux libc
  fn O_BINARY() -> int { ret 0x0000; } // nonexistent in linux libc

  fn S_IRUSR() -> uint { ret 0x0100u; }
  fn S_IWUSR() -> uint { ret 0x0080u; }
}