diff --git a/src/fuchsia/mod.rs b/src/fuchsia/mod.rs
index ba19e0c4c423f..65d7e9005ddfe 100644
--- a/src/fuchsia/mod.rs
+++ b/src/fuchsia/mod.rs
@@ -1467,26 +1467,26 @@ pub const O_RDONLY: ::c_int = 0;
 pub const O_WRONLY: ::c_int = 1;
 pub const O_RDWR: ::c_int = 2;
 
-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_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;
+pub const S_IFIFO: ::mode_t = 0o1_0000;
+pub const S_IFCHR: ::mode_t = 0o2_0000;
+pub const S_IFBLK: ::mode_t = 0o6_0000;
+pub const S_IFDIR: ::mode_t = 0o4_0000;
+pub const S_IFREG: ::mode_t = 0o10_0000;
+pub const S_IFLNK: ::mode_t = 0o12_0000;
+pub const S_IFSOCK: ::mode_t = 0o14_0000;
+pub const S_IFMT: ::mode_t = 0o17_0000;
+pub const S_IRWXU: ::mode_t = 0o0700;
+pub const S_IXUSR: ::mode_t = 0o0100;
+pub const S_IWUSR: ::mode_t = 0o0200;
+pub const S_IRUSR: ::mode_t = 0o0400;
+pub const S_IRWXG: ::mode_t = 0o0070;
+pub const S_IXGRP: ::mode_t = 0o0010;
+pub const S_IWGRP: ::mode_t = 0o0020;
+pub const S_IRGRP: ::mode_t = 0o0040;
+pub const S_IRWXO: ::mode_t = 0o0007;
+pub const S_IXOTH: ::mode_t = 0o0001;
+pub const S_IWOTH: ::mode_t = 0o0002;
+pub const S_IROTH: ::mode_t = 0o0004;
 pub const F_OK: ::c_int = 0;
 pub const R_OK: ::c_int = 4;
 pub const W_OK: ::c_int = 2;
@@ -2283,9 +2283,9 @@ pub const POSIX_MADV_RANDOM: ::c_int = 1;
 pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
 pub const POSIX_MADV_WILLNEED: ::c_int = 3;
 
-pub const S_IEXEC: mode_t = 64;
-pub const S_IWRITE: mode_t = 128;
-pub const S_IREAD: mode_t = 256;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
 
 pub const F_LOCK: ::c_int = 1;
 pub const F_TEST: ::c_int = 3;
diff --git a/src/solid/mod.rs b/src/solid/mod.rs
index c88c663ee3f8c..4c880796340eb 100644
--- a/src/solid/mod.rs
+++ b/src/solid/mod.rs
@@ -209,15 +209,15 @@ pub const O_EXCL: c_int = 0x400;
 pub const O_TEXT: c_int = 0x100;
 pub const O_BINARY: c_int = 0x200;
 pub const O_TRUNC: c_int = 0x20;
-pub const S_IEXEC: c_short = 0x0040;
-pub const S_IWRITE: c_short = 0x0080;
-pub const S_IREAD: c_short = 0x0100;
-pub const S_IFCHR: c_short = 0x2000;
-pub const S_IFDIR: c_short = 0x4000;
-pub const S_IFMT: c_short = 0o160000;
-pub const S_IFIFO: c_short = 0o0010000;
-pub const S_IFBLK: c_short = 0o0060000;
-pub const S_IFREG: c_short = 0o0100000;
+pub const S_IEXEC: c_short = 0o0100;
+pub const S_IWRITE: c_short = 0o0200;
+pub const S_IREAD: c_short = 0o0400;
+pub const S_IFCHR: c_short = 0o2_0000;
+pub const S_IFDIR: c_short = 0o4_0000;
+pub const S_IFMT: c_short = 0o16_0000;
+pub const S_IFIFO: c_short = 0o1_0000;
+pub const S_IFBLK: c_short = 0o6_0000;
+pub const S_IFREG: c_short = 0o10_0000;
 
 pub const LC_ALL: c_int = 0;
 pub const LC_COLLATE: c_int = 1;
diff --git a/src/unix/aix/mod.rs b/src/unix/aix/mod.rs
index b4b6ecac59bd5..33ae4cefe7a74 100644
--- a/src/unix/aix/mod.rs
+++ b/src/unix/aix/mod.rs
@@ -1594,29 +1594,29 @@ pub const MADV_WILLNEED: ::c_int = 3;
 pub const MADV_DONTNEED: ::c_int = 4;
 
 // sys/mode.h
-pub const S_IFMT: mode_t = 0o170000;
-pub const S_IFREG: mode_t = 0o100000;
-pub const S_IFDIR: mode_t = 0o40000;
-pub const S_IFBLK: mode_t = 0o60000;
-pub const S_IFCHR: mode_t = 0o20000;
-pub const S_IFIFO: mode_t = 0o10000;
-pub const S_IRWXU: mode_t = 0o700;
-pub const S_IRUSR: mode_t = 0o400;
-pub const S_IWUSR: mode_t = 0o200;
-pub const S_IXUSR: mode_t = 0o100;
-pub const S_IRWXG: mode_t = 0o70;
-pub const S_IRGRP: mode_t = 0o40;
-pub const S_IWGRP: mode_t = 0o20;
-pub const S_IXGRP: mode_t = 0o10;
-pub const S_IRWXO: mode_t = 7;
-pub const S_IROTH: mode_t = 4;
-pub const S_IWOTH: mode_t = 2;
-pub const S_IXOTH: mode_t = 1;
-pub const S_IFLNK: mode_t = 0o120000;
-pub const S_IFSOCK: mode_t = 0o140000;
-pub const S_IEXEC: mode_t = 0o100;
-pub const S_IWRITE: mode_t = 0o200;
-pub const S_IREAD: mode_t = 0o400;
+pub const S_IFMT: mode_t = 0o17_0000;
+pub const S_IFREG: mode_t = 0o10_0000;
+pub const S_IFDIR: mode_t = 0o4_0000;
+pub const S_IFBLK: mode_t = 0o6_0000;
+pub const S_IFCHR: mode_t = 0o2_0000;
+pub const S_IFIFO: mode_t = 0o1_0000;
+pub const S_IRWXU: mode_t = 0o0700;
+pub const S_IRUSR: mode_t = 0o0400;
+pub const S_IWUSR: mode_t = 0o0200;
+pub const S_IXUSR: mode_t = 0o0100;
+pub const S_IRWXG: mode_t = 0o0070;
+pub const S_IRGRP: mode_t = 0o0040;
+pub const S_IWGRP: mode_t = 0o0020;
+pub const S_IXGRP: mode_t = 0o0010;
+pub const S_IRWXO: mode_t = 0o0007;
+pub const S_IROTH: mode_t = 0o0004;
+pub const S_IWOTH: mode_t = 0o0002;
+pub const S_IXOTH: mode_t = 0o0001;
+pub const S_IFLNK: mode_t = 0o12_0000;
+pub const S_IFSOCK: mode_t = 0o14_0000;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
 
 // sys/msg.h
 pub const MSG_NOERROR: ::c_int = 0o10000;
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 5cad5d320e472..e3fd22356190c 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -3166,29 +3166,29 @@ pub const O_SYMLINK: ::c_int = 0x00200000;
 pub const O_DSYNC: ::c_int = 0x00400000;
 pub const O_CLOEXEC: ::c_int = 0x01000000;
 pub const O_NOFOLLOW_ANY: ::c_int = 0x20000000;
-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;
+pub const S_IFIFO: mode_t = 0o1_0000;
+pub const S_IFCHR: mode_t = 0o2_0000;
+pub const S_IFBLK: mode_t = 0o6_0000;
+pub const S_IFDIR: mode_t = 0o4_0000;
+pub const S_IFREG: mode_t = 0o10_0000;
+pub const S_IFLNK: mode_t = 0o12_0000;
+pub const S_IFSOCK: mode_t = 0o14_0000;
+pub const S_IFMT: mode_t = 0o17_0000;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
+pub const S_IRWXU: mode_t = 0o0700;
+pub const S_IXUSR: mode_t = 0o0100;
+pub const S_IWUSR: mode_t = 0o0200;
+pub const S_IRUSR: mode_t = 0o0400;
+pub const S_IRWXG: mode_t = 0o0070;
+pub const S_IXGRP: mode_t = 0o0010;
+pub const S_IWGRP: mode_t = 0o0020;
+pub const S_IRGRP: mode_t = 0o0040;
+pub const S_IRWXO: mode_t = 0o0007;
+pub const S_IXOTH: mode_t = 0o0001;
+pub const S_IWOTH: mode_t = 0o0002;
+pub const S_IROTH: mode_t = 0o0004;
 pub const F_OK: ::c_int = 0;
 pub const R_OK: ::c_int = 4;
 pub const W_OK: ::c_int = 2;
diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
index 5b8d77246978b..72ab61fae6cac 100644
--- a/src/unix/bsd/freebsdlike/mod.rs
+++ b/src/unix/bsd/freebsdlike/mod.rs
@@ -555,29 +555,29 @@ pub const TMP_MAX: ::c_uint = 308915776;
 pub const O_NOCTTY: ::c_int = 32768;
 pub const O_DIRECT: ::c_int = 0x00010000;
 
-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;
+pub const S_IFIFO: mode_t = 0o1_0000;
+pub const S_IFCHR: mode_t = 0o2_0000;
+pub const S_IFBLK: mode_t = 0o6_0000;
+pub const S_IFDIR: mode_t = 0o4_0000;
+pub const S_IFREG: mode_t = 0o10_0000;
+pub const S_IFLNK: mode_t = 0o12_0000;
+pub const S_IFSOCK: mode_t = 0o14_0000;
+pub const S_IFMT: mode_t = 0o17_0000;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
+pub const S_IRWXU: mode_t = 0o0700;
+pub const S_IXUSR: mode_t = 0o0100;
+pub const S_IWUSR: mode_t = 0o0200;
+pub const S_IRUSR: mode_t = 0o0400;
+pub const S_IRWXG: mode_t = 0o0070;
+pub const S_IXGRP: mode_t = 0o0010;
+pub const S_IWGRP: mode_t = 0o0020;
+pub const S_IRGRP: mode_t = 0o0040;
+pub const S_IRWXO: mode_t = 0o0007;
+pub const S_IXOTH: mode_t = 0o0001;
+pub const S_IWOTH: mode_t = 0o0002;
+pub const S_IROTH: mode_t = 0o0004;
 pub const F_OK: ::c_int = 0;
 pub const R_OK: ::c_int = 4;
 pub const W_OK: ::c_int = 2;
diff --git a/src/unix/bsd/netbsdlike/mod.rs b/src/unix/bsd/netbsdlike/mod.rs
index f0e1e9ea2d7a3..8b5e74cac5d8e 100644
--- a/src/unix/bsd/netbsdlike/mod.rs
+++ b/src/unix/bsd/netbsdlike/mod.rs
@@ -168,29 +168,29 @@ pub const FOPEN_MAX: ::c_uint = 20;
 pub const FILENAME_MAX: ::c_uint = 1024;
 pub const L_tmpnam: ::c_uint = 1024;
 pub const O_NOCTTY: ::c_int = 32768;
-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;
+pub const S_IFIFO: mode_t = 0o1_0000;
+pub const S_IFCHR: mode_t = 0o2_0000;
+pub const S_IFBLK: mode_t = 0o6_0000;
+pub const S_IFDIR: mode_t = 0o4_0000;
+pub const S_IFREG: mode_t = 0o10_0000;
+pub const S_IFLNK: mode_t = 0o12_0000;
+pub const S_IFSOCK: mode_t = 0o14_0000;
+pub const S_IFMT: mode_t = 0o17_0000;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
+pub const S_IRWXU: mode_t = 0o0700;
+pub const S_IXUSR: mode_t = 0o0100;
+pub const S_IWUSR: mode_t = 0o0200;
+pub const S_IRUSR: mode_t = 0o0400;
+pub const S_IRWXG: mode_t = 0o0070;
+pub const S_IXGRP: mode_t = 0o0010;
+pub const S_IWGRP: mode_t = 0o0020;
+pub const S_IRGRP: mode_t = 0o0040;
+pub const S_IRWXO: mode_t = 0o0007;
+pub const S_IXOTH: mode_t = 0o0001;
+pub const S_IWOTH: mode_t = 0o0002;
+pub const S_IROTH: mode_t = 0o0004;
 pub const F_OK: ::c_int = 0;
 pub const R_OK: ::c_int = 4;
 pub const W_OK: ::c_int = 2;
diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
index a07a5cdc2dd0d..f2c381ac6c3b7 100644
--- a/src/unix/haiku/mod.rs
+++ b/src/unix/haiku/mod.rs
@@ -771,27 +771,27 @@ pub const O_NOFOLLOW: ::c_int = 0x00080000;
 pub const O_NOCACHE: ::c_int = 0x00100000;
 pub const O_DIRECTORY: ::c_int = 0x00200000;
 
-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_IRWXU: ::mode_t = 0o00700;
-pub const S_IRUSR: ::mode_t = 0o00400;
-pub const S_IWUSR: ::mode_t = 0o00200;
-pub const S_IXUSR: ::mode_t = 0o00100;
-pub const S_IRWXG: ::mode_t = 0o00070;
-pub const S_IRGRP: ::mode_t = 0o00040;
-pub const S_IWGRP: ::mode_t = 0o00020;
-pub const S_IXGRP: ::mode_t = 0o00010;
-pub const S_IRWXO: ::mode_t = 0o00007;
-pub const S_IROTH: ::mode_t = 0o00004;
-pub const S_IWOTH: ::mode_t = 0o00002;
-pub const S_IXOTH: ::mode_t = 0o00001;
+pub const S_IFIFO: ::mode_t = 0o1_0000;
+pub const S_IFCHR: ::mode_t = 0o2_0000;
+pub const S_IFBLK: ::mode_t = 0o6_0000;
+pub const S_IFDIR: ::mode_t = 0o4_0000;
+pub const S_IFREG: ::mode_t = 0o10_0000;
+pub const S_IFLNK: ::mode_t = 0o12_0000;
+pub const S_IFSOCK: ::mode_t = 0o14_0000;
+pub const S_IFMT: ::mode_t = 0o17_0000;
+
+pub const S_IRWXU: ::mode_t = 0o0700;
+pub const S_IRUSR: ::mode_t = 0o0400;
+pub const S_IWUSR: ::mode_t = 0o0200;
+pub const S_IXUSR: ::mode_t = 0o0100;
+pub const S_IRWXG: ::mode_t = 0o0070;
+pub const S_IRGRP: ::mode_t = 0o0040;
+pub const S_IWGRP: ::mode_t = 0o0020;
+pub const S_IXGRP: ::mode_t = 0o0010;
+pub const S_IRWXO: ::mode_t = 0o0007;
+pub const S_IROTH: ::mode_t = 0o0004;
+pub const S_IWOTH: ::mode_t = 0o0002;
+pub const S_IXOTH: ::mode_t = 0o0001;
 
 pub const F_OK: ::c_int = 0;
 pub const R_OK: ::c_int = 4;
diff --git a/src/unix/hurd/mod.rs b/src/unix/hurd/mod.rs
index 5cc6992d32cae..5d3e99d5011f3 100644
--- a/src/unix/hurd/mod.rs
+++ b/src/unix/hurd/mod.rs
@@ -2117,29 +2117,29 @@ pub const MINSIGSTKSZ: usize = 8192;
 pub const SIGSTKSZ: usize = 40960;
 
 // sys/stat.h
-pub const __S_IFMT: mode_t = 61440;
-pub const __S_IFDIR: mode_t = 16384;
-pub const __S_IFCHR: mode_t = 8192;
-pub const __S_IFBLK: mode_t = 24576;
-pub const __S_IFREG: mode_t = 32768;
-pub const __S_IFLNK: mode_t = 40960;
-pub const __S_IFSOCK: mode_t = 49152;
-pub const __S_IFIFO: mode_t = 4096;
-pub const __S_ISUID: mode_t = 2048;
-pub const __S_ISGID: mode_t = 1024;
-pub const __S_ISVTX: mode_t = 512;
-pub const __S_IREAD: mode_t = 256;
-pub const __S_IWRITE: mode_t = 128;
-pub const __S_IEXEC: mode_t = 64;
-pub const S_INOCACHE: mode_t = 65536;
-pub const S_IUSEUNK: mode_t = 131072;
-pub const S_IUNKNOWN: mode_t = 1835008;
-pub const S_IUNKSHIFT: mode_t = 12;
-pub const S_IPTRANS: mode_t = 2097152;
-pub const S_IATRANS: mode_t = 4194304;
-pub const S_IROOT: mode_t = 8388608;
-pub const S_ITRANS: mode_t = 14680064;
-pub const S_IMMAP0: mode_t = 16777216;
+pub const __S_IFMT: mode_t = 0o17_0000;
+pub const __S_IFDIR: mode_t = 0o4_0000;
+pub const __S_IFCHR: mode_t = 0o2_0000;
+pub const __S_IFBLK: mode_t = 0o6_0000;
+pub const __S_IFREG: mode_t = 0o10_0000;
+pub const __S_IFLNK: mode_t = 0o12_0000;
+pub const __S_IFSOCK: mode_t = 0o14_0000;
+pub const __S_IFIFO: mode_t = 0o1_0000;
+pub const __S_ISUID: mode_t = 0o4000;
+pub const __S_ISGID: mode_t = 0o2000;
+pub const __S_ISVTX: mode_t = 0o1000;
+pub const __S_IREAD: mode_t = 0o0400;
+pub const __S_IWRITE: mode_t = 0o0200;
+pub const __S_IEXEC: mode_t = 0o0100;
+pub const S_INOCACHE: mode_t = 0o20_0000;
+pub const S_IUSEUNK: mode_t = 0o40_0000;
+pub const S_IUNKNOWN: mode_t = 0o700_0000;
+pub const S_IUNKSHIFT: mode_t = 0o0014;
+pub const S_IPTRANS: mode_t = 0o1000_0000;
+pub const S_IATRANS: mode_t = 0o2000_0000;
+pub const S_IROOT: mode_t = 0o4000_0000;
+pub const S_ITRANS: mode_t = 0o7000_0000;
+pub const S_IMMAP0: mode_t = 0o10000_0000;
 pub const CMASK: mode_t = 18;
 pub const UF_SETTABLE: ::c_uint = 65535;
 pub const UF_NODUMP: ::c_uint = 1;
@@ -2155,32 +2155,32 @@ pub const SF_NOUNLINK: ::c_uint = 1048576;
 pub const SF_SNAPSHOT: ::c_uint = 2097152;
 pub const UTIME_NOW: ::c_long = -1;
 pub const UTIME_OMIT: ::c_long = -2;
-pub const S_IFMT: ::mode_t = 61440;
-pub const S_IFDIR: ::mode_t = 16384;
-pub const S_IFCHR: ::mode_t = 8192;
-pub const S_IFBLK: ::mode_t = 24576;
-pub const S_IFREG: ::mode_t = 32768;
-pub const S_IFIFO: ::mode_t = 4096;
-pub const S_IFLNK: ::mode_t = 40960;
-pub const S_IFSOCK: ::mode_t = 49152;
-pub const S_ISUID: ::mode_t = 2048;
-pub const S_ISGID: ::mode_t = 1024;
-pub const S_ISVTX: ::mode_t = 512;
-pub const S_IRUSR: ::mode_t = 256;
-pub const S_IWUSR: ::mode_t = 128;
-pub const S_IXUSR: ::mode_t = 64;
-pub const S_IRWXU: ::mode_t = 448;
-pub const S_IREAD: ::mode_t = 256;
-pub const S_IWRITE: ::mode_t = 128;
-pub const S_IEXEC: ::mode_t = 64;
-pub const S_IRGRP: ::mode_t = 32;
-pub const S_IWGRP: ::mode_t = 16;
-pub const S_IXGRP: ::mode_t = 8;
-pub const S_IRWXG: ::mode_t = 56;
-pub const S_IROTH: ::mode_t = 4;
-pub const S_IWOTH: ::mode_t = 2;
-pub const S_IXOTH: ::mode_t = 1;
-pub const S_IRWXO: ::mode_t = 7;
+pub const S_IFMT: ::mode_t = 0o17_0000;
+pub const S_IFDIR: ::mode_t = 0o4_0000;
+pub const S_IFCHR: ::mode_t = 0o2_0000;
+pub const S_IFBLK: ::mode_t = 0o6_0000;
+pub const S_IFREG: ::mode_t = 0o10_0000;
+pub const S_IFIFO: ::mode_t = 0o1_0000;
+pub const S_IFLNK: ::mode_t = 0o12_0000;
+pub const S_IFSOCK: ::mode_t = 0o14_0000;
+pub const S_ISUID: ::mode_t = 0o4000;
+pub const S_ISGID: ::mode_t = 0o2000;
+pub const S_ISVTX: ::mode_t = 0o1000;
+pub const S_IRUSR: ::mode_t = 0o0400;
+pub const S_IWUSR: ::mode_t = 0o0200;
+pub const S_IXUSR: ::mode_t = 0o0100;
+pub const S_IRWXU: ::mode_t = 0o0700;
+pub const S_IREAD: ::mode_t = 0o0400;
+pub const S_IWRITE: ::mode_t = 0o0200;
+pub const S_IEXEC: ::mode_t = 0o0100;
+pub const S_IRGRP: ::mode_t = 0o0040;
+pub const S_IWGRP: ::mode_t = 0o0020;
+pub const S_IXGRP: ::mode_t = 0o0010;
+pub const S_IRWXG: ::mode_t = 0o0070;
+pub const S_IROTH: ::mode_t = 0o0004;
+pub const S_IWOTH: ::mode_t = 0o0002;
+pub const S_IXOTH: ::mode_t = 0o0001;
+pub const S_IRWXO: ::mode_t = 0o0007;
 pub const ACCESSPERMS: ::mode_t = 511;
 pub const ALLPERMS: ::mode_t = 4095;
 pub const DEFFILEMODE: ::mode_t = 438;
diff --git a/src/unix/linux_like/emscripten/mod.rs b/src/unix/linux_like/emscripten/mod.rs
index 07f33fc9839d3..8014060890963 100644
--- a/src/unix/linux_like/emscripten/mod.rs
+++ b/src/unix/linux_like/emscripten/mod.rs
@@ -775,9 +775,9 @@ pub const POSIX_MADV_RANDOM: ::c_int = 1;
 pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
 pub const POSIX_MADV_WILLNEED: ::c_int = 3;
 
-pub const S_IEXEC: mode_t = 64;
-pub const S_IWRITE: mode_t = 128;
-pub const S_IREAD: mode_t = 256;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
 
 pub const F_LOCK: ::c_int = 1;
 pub const F_TEST: ::c_int = 3;
diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
index 125a4129ef61f..a463951bbbb67 100644
--- a/src/unix/linux_like/linux/mod.rs
+++ b/src/unix/linux_like/linux/mod.rs
@@ -2240,9 +2240,9 @@ pub const POSIX_MADV_WILLNEED: ::c_int = 3;
 pub const POSIX_SPAWN_USEVFORK: ::c_int = 64;
 pub const POSIX_SPAWN_SETSID: ::c_int = 128;
 
-pub const S_IEXEC: mode_t = 64;
-pub const S_IWRITE: mode_t = 128;
-pub const S_IREAD: mode_t = 256;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
 
 pub const F_LOCK: ::c_int = 1;
 pub const F_TEST: ::c_int = 3;
diff --git a/src/unix/linux_like/mod.rs b/src/unix/linux_like/mod.rs
index d80b00f423eca..af2ad39cba4ef 100644
--- a/src/unix/linux_like/mod.rs
+++ b/src/unix/linux_like/mod.rs
@@ -505,26 +505,26 @@ pub const O_RDWR: ::c_int = 2;
 
 pub const SOCK_CLOEXEC: ::c_int = O_CLOEXEC;
 
-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_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;
+pub const S_IFIFO: ::mode_t = 0o1_0000;
+pub const S_IFCHR: ::mode_t = 0o2_0000;
+pub const S_IFBLK: ::mode_t = 0o6_0000;
+pub const S_IFDIR: ::mode_t = 0o4_0000;
+pub const S_IFREG: ::mode_t = 0o10_0000;
+pub const S_IFLNK: ::mode_t = 0o12_0000;
+pub const S_IFSOCK: ::mode_t = 0o14_0000;
+pub const S_IFMT: ::mode_t = 0o17_0000;
+pub const S_IRWXU: ::mode_t = 0o0700;
+pub const S_IXUSR: ::mode_t = 0o0100;
+pub const S_IWUSR: ::mode_t = 0o0200;
+pub const S_IRUSR: ::mode_t = 0o0400;
+pub const S_IRWXG: ::mode_t = 0o0070;
+pub const S_IXGRP: ::mode_t = 0o0010;
+pub const S_IWGRP: ::mode_t = 0o0020;
+pub const S_IRGRP: ::mode_t = 0o0040;
+pub const S_IRWXO: ::mode_t = 0o0007;
+pub const S_IXOTH: ::mode_t = 0o0001;
+pub const S_IWOTH: ::mode_t = 0o0002;
+pub const S_IROTH: ::mode_t = 0o0004;
 pub const F_OK: ::c_int = 0;
 pub const R_OK: ::c_int = 4;
 pub const W_OK: ::c_int = 2;
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 0b270c0a39bca..90280a14d3f45 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -235,9 +235,9 @@ cfg_if! {
 }
 pub const SIGIOT: ::c_int = 6;
 
-pub const S_ISUID: ::mode_t = 0x800;
-pub const S_ISGID: ::mode_t = 0x400;
-pub const S_ISVTX: ::mode_t = 0x200;
+pub const S_ISUID: ::mode_t = 0o4000;
+pub const S_ISGID: ::mode_t = 0o2000;
+pub const S_ISVTX: ::mode_t = 0o1000;
 
 cfg_if! {
     if #[cfg(not(any(target_os = "haiku", target_os = "illumos",
diff --git a/src/unix/newlib/mod.rs b/src/unix/newlib/mod.rs
index 3a9a73c2d5fc8..45a2668aac71a 100644
--- a/src/unix/newlib/mod.rs
+++ b/src/unix/newlib/mod.rs
@@ -420,27 +420,27 @@ pub const FIOCLEX: ::c_ulong = 0x20006601;
 pub const FIONCLEX: ::c_ulong = 0x20006602;
 
 pub const S_BLKSIZE: ::mode_t = 1024;
-pub const S_IREAD: ::mode_t = 256;
-pub const S_IWRITE: ::mode_t = 128;
-pub const S_IEXEC: ::mode_t = 64;
-pub const S_ENFMT: ::mode_t = 1024;
-pub const S_IFMT: ::mode_t = 61440;
-pub const S_IFDIR: ::mode_t = 16384;
-pub const S_IFCHR: ::mode_t = 8192;
-pub const S_IFBLK: ::mode_t = 24576;
-pub const S_IFREG: ::mode_t = 32768;
-pub const S_IFLNK: ::mode_t = 40960;
-pub const S_IFSOCK: ::mode_t = 49152;
-pub const S_IFIFO: ::mode_t = 4096;
-pub const S_IRUSR: ::mode_t = 256;
-pub const S_IWUSR: ::mode_t = 128;
-pub const S_IXUSR: ::mode_t = 64;
-pub const S_IRGRP: ::mode_t = 32;
-pub const S_IWGRP: ::mode_t = 16;
-pub const S_IXGRP: ::mode_t = 8;
-pub const S_IROTH: ::mode_t = 4;
-pub const S_IWOTH: ::mode_t = 2;
-pub const S_IXOTH: ::mode_t = 1;
+pub const S_IREAD: ::mode_t = 0o0400;
+pub const S_IWRITE: ::mode_t = 0o0200;
+pub const S_IEXEC: ::mode_t = 0o0100;
+pub const S_ENFMT: ::mode_t = 0o2000;
+pub const S_IFMT: ::mode_t = 0o17_0000;
+pub const S_IFDIR: ::mode_t = 0o4_0000;
+pub const S_IFCHR: ::mode_t = 0o2_0000;
+pub const S_IFBLK: ::mode_t = 0o6_0000;
+pub const S_IFREG: ::mode_t = 0o10_0000;
+pub const S_IFLNK: ::mode_t = 0o12_0000;
+pub const S_IFSOCK: ::mode_t = 0o14_0000;
+pub const S_IFIFO: ::mode_t = 0o1_0000;
+pub const S_IRUSR: ::mode_t = 0o0400;
+pub const S_IWUSR: ::mode_t = 0o0200;
+pub const S_IXUSR: ::mode_t = 0o0100;
+pub const S_IRGRP: ::mode_t = 0o0040;
+pub const S_IWGRP: ::mode_t = 0o0020;
+pub const S_IXGRP: ::mode_t = 0o0010;
+pub const S_IROTH: ::mode_t = 0o0004;
+pub const S_IWOTH: ::mode_t = 0o0002;
+pub const S_IXOTH: ::mode_t = 0o0001;
 
 pub const SOL_TCP: ::c_int = 6;
 
diff --git a/src/unix/nto/mod.rs b/src/unix/nto/mod.rs
index 7e5d228ccf7f7..10c03c55da2a0 100644
--- a/src/unix/nto/mod.rs
+++ b/src/unix/nto/mod.rs
@@ -2037,27 +2037,27 @@ pub const S_IEXEC: mode_t = ::S_IXUSR;
 pub const S_IWRITE: mode_t = ::S_IWUSR;
 pub const S_IREAD: mode_t = ::S_IRUSR;
 
-pub const S_IFIFO: ::mode_t = 0x1000;
-pub const S_IFCHR: ::mode_t = 0x2000;
-pub const S_IFDIR: ::mode_t = 0x4000;
-pub const S_IFBLK: ::mode_t = 0x6000;
-pub const S_IFREG: ::mode_t = 0x8000;
-pub const S_IFLNK: ::mode_t = 0xA000;
-pub const S_IFSOCK: ::mode_t = 0xC000;
-pub const S_IFMT: ::mode_t = 0xF000;
-
-pub const S_IXOTH: ::mode_t = 0o000001;
-pub const S_IWOTH: ::mode_t = 0o000002;
-pub const S_IROTH: ::mode_t = 0o000004;
-pub const S_IRWXO: ::mode_t = 0o000007;
-pub const S_IXGRP: ::mode_t = 0o000010;
-pub const S_IWGRP: ::mode_t = 0o000020;
-pub const S_IRGRP: ::mode_t = 0o000040;
-pub const S_IRWXG: ::mode_t = 0o000070;
-pub const S_IXUSR: ::mode_t = 0o000100;
-pub const S_IWUSR: ::mode_t = 0o000200;
-pub const S_IRUSR: ::mode_t = 0o000400;
-pub const S_IRWXU: ::mode_t = 0o000700;
+pub const S_IFIFO: ::mode_t = 0o1_0000;
+pub const S_IFCHR: ::mode_t = 0o2_0000;
+pub const S_IFDIR: ::mode_t = 0o4_0000;
+pub const S_IFBLK: ::mode_t = 0o6_0000;
+pub const S_IFREG: ::mode_t = 0o10_0000;
+pub const S_IFLNK: ::mode_t = 0o12_0000;
+pub const S_IFSOCK: ::mode_t = 0o14_0000;
+pub const S_IFMT: ::mode_t = 0o17_0000;
+
+pub const S_IXOTH: ::mode_t = 0o0001;
+pub const S_IWOTH: ::mode_t = 0o0002;
+pub const S_IROTH: ::mode_t = 0o0004;
+pub const S_IRWXO: ::mode_t = 0o0007;
+pub const S_IXGRP: ::mode_t = 0o0010;
+pub const S_IWGRP: ::mode_t = 0o0020;
+pub const S_IRGRP: ::mode_t = 0o0040;
+pub const S_IRWXG: ::mode_t = 0o0070;
+pub const S_IXUSR: ::mode_t = 0o0100;
+pub const S_IWUSR: ::mode_t = 0o0200;
+pub const S_IRUSR: ::mode_t = 0o0400;
+pub const S_IRWXU: ::mode_t = 0o0700;
 
 pub const F_LOCK: ::c_int = 1;
 pub const F_TEST: ::c_int = 3;
diff --git a/src/unix/redox/mod.rs b/src/unix/redox/mod.rs
index 017d5038905f6..bc6e2a8a93d4e 100644
--- a/src/unix/redox/mod.rs
+++ b/src/unix/redox/mod.rs
@@ -701,26 +701,26 @@ pub const EPOLLONESHOT: ::c_int = 0;
 pub const EPOLLET: ::c_int = 0;
 
 // sys/stat.h
-pub const S_IFMT: ::c_int = 0o0_170_000;
-pub const S_IFDIR: ::c_int = 0o040_000;
-pub const S_IFCHR: ::c_int = 0o020_000;
-pub const S_IFBLK: ::c_int = 0o060_000;
-pub const S_IFREG: ::c_int = 0o100_000;
-pub const S_IFIFO: ::c_int = 0o010_000;
-pub const S_IFLNK: ::c_int = 0o120_000;
-pub const S_IFSOCK: ::c_int = 0o140_000;
-pub const S_IRWXU: ::c_int = 0o0_700;
-pub const S_IRUSR: ::c_int = 0o0_400;
-pub const S_IWUSR: ::c_int = 0o0_200;
-pub const S_IXUSR: ::c_int = 0o0_100;
-pub const S_IRWXG: ::c_int = 0o0_070;
-pub const S_IRGRP: ::c_int = 0o0_040;
-pub const S_IWGRP: ::c_int = 0o0_020;
-pub const S_IXGRP: ::c_int = 0o0_010;
-pub const S_IRWXO: ::c_int = 0o0_007;
-pub const S_IROTH: ::c_int = 0o0_004;
-pub const S_IWOTH: ::c_int = 0o0_002;
-pub const S_IXOTH: ::c_int = 0o0_001;
+pub const S_IFMT: ::c_int = 0o17_0000;
+pub const S_IFDIR: ::c_int = 0o4_0000;
+pub const S_IFCHR: ::c_int = 0o2_0000;
+pub const S_IFBLK: ::c_int = 0o6_0000;
+pub const S_IFREG: ::c_int = 0o10_0000;
+pub const S_IFIFO: ::c_int = 0o1_0000;
+pub const S_IFLNK: ::c_int = 0o12_0000;
+pub const S_IFSOCK: ::c_int = 0o14_0000;
+pub const S_IRWXU: ::c_int = 0o0700;
+pub const S_IRUSR: ::c_int = 0o0400;
+pub const S_IWUSR: ::c_int = 0o0200;
+pub const S_IXUSR: ::c_int = 0o0100;
+pub const S_IRWXG: ::c_int = 0o0070;
+pub const S_IRGRP: ::c_int = 0o0040;
+pub const S_IWGRP: ::c_int = 0o0020;
+pub const S_IXGRP: ::c_int = 0o0010;
+pub const S_IRWXO: ::c_int = 0o0007;
+pub const S_IROTH: ::c_int = 0o0004;
+pub const S_IWOTH: ::c_int = 0o0002;
+pub const S_IXOTH: ::c_int = 0o0001;
 
 // stdlib.h
 pub const EXIT_SUCCESS: ::c_int = 0;
diff --git a/src/unix/solarish/mod.rs b/src/unix/solarish/mod.rs
index ced5827cb192f..6c0d76d47b6cb 100644
--- a/src/unix/solarish/mod.rs
+++ b/src/unix/solarish/mod.rs
@@ -1287,29 +1287,29 @@ pub const O_ACCMODE: ::c_int = 0x600003;
 pub const O_XATTR: ::c_int = 0x4000;
 pub const O_DIRECTORY: ::c_int = 0x1000000;
 pub const O_DIRECT: ::c_int = 0x2000000;
-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;
+pub const S_IFIFO: mode_t = 0o1_0000;
+pub const S_IFCHR: mode_t = 0o2_0000;
+pub const S_IFBLK: mode_t = 0o6_0000;
+pub const S_IFDIR: mode_t = 0o4_0000;
+pub const S_IFREG: mode_t = 0o10_0000;
+pub const S_IFLNK: mode_t = 0o12_0000;
+pub const S_IFSOCK: mode_t = 0o14_0000;
+pub const S_IFMT: mode_t = 0o17_0000;
+pub const S_IEXEC: mode_t = 0o0100;
+pub const S_IWRITE: mode_t = 0o0200;
+pub const S_IREAD: mode_t = 0o0400;
+pub const S_IRWXU: mode_t = 0o0700;
+pub const S_IXUSR: mode_t = 0o0100;
+pub const S_IWUSR: mode_t = 0o0200;
+pub const S_IRUSR: mode_t = 0o0400;
+pub const S_IRWXG: mode_t = 0o0070;
+pub const S_IXGRP: mode_t = 0o0010;
+pub const S_IWGRP: mode_t = 0o0020;
+pub const S_IRGRP: mode_t = 0o0040;
+pub const S_IRWXO: mode_t = 0o0007;
+pub const S_IXOTH: mode_t = 0o0001;
+pub const S_IWOTH: mode_t = 0o0002;
+pub const S_IROTH: mode_t = 0o0004;
 pub const F_OK: ::c_int = 0;
 pub const R_OK: ::c_int = 4;
 pub const W_OK: ::c_int = 2;
diff --git a/src/vxworks/mod.rs b/src/vxworks/mod.rs
index 23637b6998a77..4e23f250ba5a0 100644
--- a/src/vxworks/mod.rs
+++ b/src/vxworks/mod.rs
@@ -741,30 +741,30 @@ pub const IPV6_ADD_MEMBERSHIP: ::c_int = 12;
 pub const IPV6_DROP_MEMBERSHIP: ::c_int = 13;
 
 // STAT Stuff
-pub const S_IFMT: ::c_int = 0xf000;
-pub const S_IFIFO: ::c_int = 0x1000;
-pub const S_IFCHR: ::c_int = 0x2000;
-pub const S_IFDIR: ::c_int = 0x4000;
-pub const S_IFBLK: ::c_int = 0x6000;
-pub const S_IFREG: ::c_int = 0x8000;
-pub const S_IFLNK: ::c_int = 0xa000;
-pub const S_IFSHM: ::c_int = 0xb000;
-pub const S_IFSOCK: ::c_int = 0xc000;
-pub const S_ISUID: ::c_int = 0x0800;
-pub const S_ISGID: ::c_int = 0x0400;
-pub const S_ISTXT: ::c_int = 0x0200;
-pub const S_IRUSR: ::c_int = 0x0100;
-pub const S_IWUSR: ::c_int = 0x0080;
-pub const S_IXUSR: ::c_int = 0x0040;
-pub const S_IRWXU: ::c_int = 0x01c0;
-pub const S_IRGRP: ::c_int = 0x0020;
-pub const S_IWGRP: ::c_int = 0x0010;
-pub const S_IXGRP: ::c_int = 0x0008;
-pub const S_IRWXG: ::c_int = 0x0038;
-pub const S_IROTH: ::c_int = 0x0004;
-pub const S_IWOTH: ::c_int = 0x0002;
-pub const S_IXOTH: ::c_int = 0x0001;
-pub const S_IRWXO: ::c_int = 0x0007;
+pub const S_IFMT: ::c_int = 0o17_0000;
+pub const S_IFIFO: ::c_int = 0o1_0000;
+pub const S_IFCHR: ::c_int = 0o2_0000;
+pub const S_IFDIR: ::c_int = 0o4_0000;
+pub const S_IFBLK: ::c_int = 0o6_0000;
+pub const S_IFREG: ::c_int = 0o10_0000;
+pub const S_IFLNK: ::c_int = 0o12_0000;
+pub const S_IFSHM: ::c_int = 0o13_0000;
+pub const S_IFSOCK: ::c_int = 0o14_0000;
+pub const S_ISUID: ::c_int = 0o4000;
+pub const S_ISGID: ::c_int = 0o2000;
+pub const S_ISTXT: ::c_int = 0o1000;
+pub const S_IRUSR: ::c_int = 0o0400;
+pub const S_IWUSR: ::c_int = 0o0200;
+pub const S_IXUSR: ::c_int = 0o0100;
+pub const S_IRWXU: ::c_int = 0o0700;
+pub const S_IRGRP: ::c_int = 0o0040;
+pub const S_IWGRP: ::c_int = 0o0020;
+pub const S_IXGRP: ::c_int = 0o0010;
+pub const S_IRWXG: ::c_int = 0o0070;
+pub const S_IROTH: ::c_int = 0o0004;
+pub const S_IWOTH: ::c_int = 0o0002;
+pub const S_IXOTH: ::c_int = 0o0001;
+pub const S_IRWXO: ::c_int = 0o0007;
 
 // socket.h
 pub const SOL_SOCKET: ::c_int = 0xffff;
diff --git a/src/wasi.rs b/src/wasi.rs
index 39d6949146405..87e1e72891840 100644
--- a/src/wasi.rs
+++ b/src/wasi.rs
@@ -239,29 +239,29 @@ pub const AT_SYMLINK_FOLLOW: c_int = 0x2;
 pub const AT_REMOVEDIR: c_int = 0x4;
 pub const UTIME_OMIT: c_long = 0xfffffffe;
 pub const UTIME_NOW: c_long = 0xffffffff;
-pub const S_IFIFO: mode_t = 49152;
-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 = 57344;
-pub const S_IRWXO: mode_t = 0x7;
-pub const S_IXOTH: mode_t = 0x1;
-pub const S_IWOTH: mode_t = 0x2;
-pub const S_IROTH: mode_t = 0x4;
-pub const S_IRWXG: mode_t = 0x38;
-pub const S_IXGRP: mode_t = 0x8;
-pub const S_IWGRP: mode_t = 0x10;
-pub const S_IRGRP: mode_t = 0x20;
-pub const S_IRWXU: mode_t = 0x1c0;
-pub const S_IXUSR: mode_t = 0x40;
-pub const S_IWUSR: mode_t = 0x80;
-pub const S_IRUSR: mode_t = 0x100;
-pub const S_ISVTX: mode_t = 0x200;
-pub const S_ISGID: mode_t = 0x400;
-pub const S_ISUID: mode_t = 0x800;
+pub const S_IFIFO: mode_t = 0o14_0000;
+pub const S_IFCHR: mode_t = 0o2_0000;
+pub const S_IFBLK: mode_t = 0o6_0000;
+pub const S_IFDIR: mode_t = 0o4_0000;
+pub const S_IFREG: mode_t = 0o10_0000;
+pub const S_IFLNK: mode_t = 0o12_0000;
+pub const S_IFSOCK: mode_t = 0o14_0000;
+pub const S_IFMT: mode_t = 0o16_0000;
+pub const S_IRWXO: mode_t = 0o0007;
+pub const S_IXOTH: mode_t = 0o0001;
+pub const S_IWOTH: mode_t = 0o0002;
+pub const S_IROTH: mode_t = 0o0004;
+pub const S_IRWXG: mode_t = 0o0070;
+pub const S_IXGRP: mode_t = 0o0010;
+pub const S_IWGRP: mode_t = 0o0020;
+pub const S_IRGRP: mode_t = 0o0040;
+pub const S_IRWXU: mode_t = 0o0700;
+pub const S_IXUSR: mode_t = 0o0100;
+pub const S_IWUSR: mode_t = 0o0200;
+pub const S_IRUSR: mode_t = 0o0400;
+pub const S_ISVTX: mode_t = 0o1000;
+pub const S_ISGID: mode_t = 0o2000;
+pub const S_ISUID: mode_t = 0o4000;
 pub const DT_UNKNOWN: u8 = 0;
 pub const DT_BLK: u8 = 1;
 pub const DT_CHR: u8 = 2;
diff --git a/src/windows/mod.rs b/src/windows/mod.rs
index 7ac9e955f9717..8fcdfbede0866 100644
--- a/src/windows/mod.rs
+++ b/src/windows/mod.rs
@@ -140,13 +140,13 @@ pub const _O_OBTAIN_DIR: ::c_int = 0x2000;
 pub const O_SEQUENTIAL: ::c_int = 0x0020;
 pub const O_RANDOM: ::c_int = 0x0010;
 
-pub const S_IFCHR: ::c_int = 8192;
-pub const S_IFDIR: ::c_int = 16384;
-pub const S_IFREG: ::c_int = 32768;
-pub const S_IFMT: ::c_int = 61440;
-pub const S_IEXEC: ::c_int = 64;
-pub const S_IWRITE: ::c_int = 128;
-pub const S_IREAD: ::c_int = 256;
+pub const S_IFCHR: ::c_int = 0o2_0000;
+pub const S_IFDIR: ::c_int = 0o4_0000;
+pub const S_IFREG: ::c_int = 0o10_0000;
+pub const S_IFMT: ::c_int = 0o17_0000;
+pub const S_IEXEC: ::c_int = 0o0100;
+pub const S_IWRITE: ::c_int = 0o0200;
+pub const S_IREAD: ::c_int = 0o0400;
 
 pub const LC_ALL: ::c_int = 0;
 pub const LC_COLLATE: ::c_int = 1;