Add some permission and misc (mostly 'mode_t' related) constants to Redox.

src/redox.rs

@@ -52,6 +52,37 @@ pub const STDIN_FILENO: ::c_int = 0;
 pub const STDOUT_FILENO: ::c_int = 1;
 pub const STDERR_FILENO: ::c_int = 2;
 
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+
+pub const S_ISUID: ::c_int = 0x800;
+pub const S_ISGID: ::c_int = 0x400;
+pub const S_ISVTX: ::c_int = 0x200;
+
+pub const S_IFIFO: mode_t = 4096;
+pub const S_IFCHR: mode_t = 8192;
+pub const S_IFBLK: mode_t = 24576;
+pub const S_IFDIR: mode_t = 16384;
+pub const S_IFREG: mode_t = 32768;
+pub const S_IFLNK: mode_t = 40960;
+pub const S_IFSOCK: mode_t = 49152;
+pub const S_IFMT: mode_t = 61440;
+pub const S_IEXEC: mode_t = 64;
+pub const S_IWRITE: mode_t = 128;
+pub const S_IREAD: mode_t = 256;
+pub const S_IRWXU: mode_t = 448;
+pub const S_IXUSR: mode_t = 64;
+pub const S_IWUSR: mode_t = 128;
+pub const S_IRUSR: mode_t = 256;
+pub const S_IRWXG: mode_t = 56;
+pub const S_IXGRP: mode_t = 8;
+pub const S_IWGRP: mode_t = 16;
+pub const S_IRGRP: mode_t = 32;
+pub const S_IRWXO: mode_t = 7;
+pub const S_IXOTH: mode_t = 1;
+pub const S_IWOTH: mode_t = 2;
+pub const S_IROTH: mode_t = 4;
+
 extern {
     pub fn memalign(align: ::size_t, size: ::size_t) -> *mut ::c_void;
     pub fn read(fd: ::c_int, buf: *mut ::c_void, count: ::size_t)