Commit e5627f8e63

Greg V <greg@unrelenting.technology>
2018-10-17 21:21:48
Support more of std on FreeBSD
1 parent 831bb66
std/c/freebsd.zig
@@ -0,0 +1,36 @@
+
+const timespec = @import("../os/freebsd/index.zig").timespec;
+
+extern "c" fn __error() *c_int;
+pub const _errno = __error;
+
+pub extern "c" fn kqueue() c_int;
+pub extern "c" fn kevent(
+    kq: c_int,
+    changelist: [*]const Kevent,
+    nchanges: c_int,
+    eventlist: [*]Kevent,
+    nevents: c_int,
+    timeout: ?*const timespec,
+) c_int;
+pub extern "c" fn sysctl(name: [*]c_int, namelen: c_uint, oldp: ?*c_void, oldlenp: ?*usize, newp: ?*c_void, newlen: usize) c_int;
+pub extern "c" fn sysctlbyname(name: [*]const u8, oldp: ?*c_void, oldlenp: ?*usize, newp: ?*c_void, newlen: usize) c_int;
+pub extern "c" fn sysctlnametomib(name: [*]const u8, mibp: ?*c_int, sizep: ?*usize) c_int;
+
+/// Renamed from `kevent` to `Kevent` to avoid conflict with function name.
+pub const Kevent = extern struct.{
+    ident: usize,
+    filter: i16,
+    flags: u16,
+    fflags: u32,
+    data: i64,
+    udata: usize,
+    // TODO ext
+};
+
+
+pub const pthread_attr_t = extern struct.{
+    __size: [56]u8,
+    __align: c_long,
+};
+
std/c/index.zig
@@ -5,6 +5,7 @@ pub use switch (builtin.os) {
     Os.linux => @import("linux.zig"),
     Os.windows => @import("windows.zig"),
     Os.macosx, Os.ios => @import("darwin.zig"),
+    Os.freebsd => @import("freebsd.zig"),
     else => empty_import,
 };
 const empty_import = @import("../empty.zig");
std/event/fs.zig
@@ -83,6 +83,7 @@ pub async fn pwritev(loop: *Loop, fd: os.FileHandle, data: []const []const u8, o
     switch (builtin.os) {
         builtin.Os.macosx,
         builtin.Os.linux,
+        builtin.Os.freebsd,
         => {
             const iovecs = try loop.allocator.alloc(os.posix.iovec_const, data.len);
             defer loop.allocator.free(iovecs);
@@ -219,6 +220,7 @@ pub async fn preadv(loop: *Loop, fd: os.FileHandle, data: []const []u8, offset:
     switch (builtin.os) {
         builtin.Os.macosx,
         builtin.Os.linux,
+        builtin.Os.freebsd,
         => {
             const iovecs = try loop.allocator.alloc(os.posix.iovec, data.len);
             defer loop.allocator.free(iovecs);
@@ -399,7 +401,7 @@ pub async fn openPosix(
 
 pub async fn openRead(loop: *Loop, path: []const u8) os.File.OpenError!os.FileHandle {
     switch (builtin.os) {
-        builtin.Os.macosx, builtin.Os.linux => {
+        builtin.Os.macosx, builtin.Os.linux, builtin.Os.freebsd => {
             const flags = posix.O_LARGEFILE | posix.O_RDONLY | posix.O_CLOEXEC;
             return await (async openPosix(loop, path, flags, os.File.default_mode) catch unreachable);
         },
@@ -427,6 +429,7 @@ pub async fn openWriteMode(loop: *Loop, path: []const u8, mode: os.File.Mode) os
     switch (builtin.os) {
         builtin.Os.macosx,
         builtin.Os.linux,
+        builtin.Os.freebsd,
         => {
             const flags = posix.O_LARGEFILE | posix.O_WRONLY | posix.O_CREAT | posix.O_CLOEXEC | posix.O_TRUNC;
             return await (async openPosix(loop, path, flags, os.File.default_mode) catch unreachable);
@@ -449,7 +452,7 @@ pub async fn openReadWrite(
     mode: os.File.Mode,
 ) os.File.OpenError!os.FileHandle {
     switch (builtin.os) {
-        builtin.Os.macosx, builtin.Os.linux => {
+        builtin.Os.macosx, builtin.Os.linux, builtin.Os.freebsd => {
             const flags = posix.O_LARGEFILE | posix.O_RDWR | posix.O_CREAT | posix.O_CLOEXEC;
             return await (async openPosix(loop, path, flags, mode) catch unreachable);
         },
@@ -477,7 +480,7 @@ pub const CloseOperation = struct.{
     os_data: OsData,
 
     const OsData = switch (builtin.os) {
-        builtin.Os.linux, builtin.Os.macosx => OsDataPosix,
+        builtin.Os.linux, builtin.Os.macosx, builtin.Os.freebsd => OsDataPosix,
 
         builtin.Os.windows => struct.{
             handle: ?os.FileHandle,
@@ -496,7 +499,7 @@ pub const CloseOperation = struct.{
         self.* = CloseOperation.{
             .loop = loop,
             .os_data = switch (builtin.os) {
-                builtin.Os.linux, builtin.Os.macosx => initOsDataPosix(self),
+                builtin.Os.linux, builtin.Os.macosx, builtin.Os.freebsd => initOsDataPosix(self),
                 builtin.Os.windows => OsData.{ .handle = null },
                 else => @compileError("Unsupported OS"),
             },
@@ -525,6 +528,7 @@ pub const CloseOperation = struct.{
         switch (builtin.os) {
             builtin.Os.linux,
             builtin.Os.macosx,
+            builtin.Os.freebsd,
             => {
                 if (self.os_data.have_fd) {
                     self.loop.posixFsRequest(&self.os_data.close_req_node);
@@ -546,6 +550,7 @@ pub const CloseOperation = struct.{
         switch (builtin.os) {
             builtin.Os.linux,
             builtin.Os.macosx,
+            builtin.Os.freebsd,
             => {
                 self.os_data.close_req_node.data.msg.Close.fd = handle;
                 self.os_data.have_fd = true;
@@ -562,6 +567,7 @@ pub const CloseOperation = struct.{
         switch (builtin.os) {
             builtin.Os.linux,
             builtin.Os.macosx,
+            builtin.Os.freebsd,
             => {
                 self.os_data.have_fd = false;
             },
@@ -576,6 +582,7 @@ pub const CloseOperation = struct.{
         switch (builtin.os) {
             builtin.Os.linux,
             builtin.Os.macosx,
+            builtin.Os.freebsd,
             => {
                 assert(self.os_data.have_fd);
                 return self.os_data.close_req_node.data.msg.Close.fd;
@@ -599,6 +606,7 @@ pub async fn writeFileMode(loop: *Loop, path: []const u8, contents: []const u8,
     switch (builtin.os) {
         builtin.Os.linux,
         builtin.Os.macosx,
+        builtin.Os.freebsd,
         => return await (async writeFileModeThread(loop, path, contents, mode) catch unreachable),
         builtin.Os.windows => return await (async writeFileWindows(loop, path, contents) catch unreachable),
         else => @compileError("Unsupported OS"),
@@ -704,7 +712,7 @@ pub fn Watch(comptime V: type) type {
         os_data: OsData,
 
         const OsData = switch (builtin.os) {
-            builtin.Os.macosx => struct.{
+            builtin.Os.macosx, builtin.Os.freebsd => struct.{
                 file_table: FileTable,
                 table_lock: event.Lock,
 
@@ -793,7 +801,7 @@ pub fn Watch(comptime V: type) type {
                     return self;
                 },
 
-                builtin.Os.macosx => {
+                builtin.Os.macosx, builtin.Os.freebsd => {
                     const self = try loop.allocator.createOne(Self);
                     errdefer loop.allocator.destroy(self);
 
@@ -813,7 +821,7 @@ pub fn Watch(comptime V: type) type {
         /// All addFile calls and removeFile calls must have completed.
         pub fn destroy(self: *Self) void {
             switch (builtin.os) {
-                builtin.Os.macosx => {
+                builtin.Os.macosx, builtin.Os.freebsd => {
                     // TODO we need to cancel the coroutines before destroying the lock
                     self.os_data.table_lock.deinit();
                     var it = self.os_data.file_table.iterator();
@@ -855,14 +863,14 @@ pub fn Watch(comptime V: type) type {
 
         pub async fn addFile(self: *Self, file_path: []const u8, value: V) !?V {
             switch (builtin.os) {
-                builtin.Os.macosx => return await (async addFileMacosx(self, file_path, value) catch unreachable),
+                builtin.Os.macosx, builtin.Os.freebsd => return await (async addFileKEvent(self, file_path, value) catch unreachable),
                 builtin.Os.linux => return await (async addFileLinux(self, file_path, value) catch unreachable),
                 builtin.Os.windows => return await (async addFileWindows(self, file_path, value) catch unreachable),
                 else => @compileError("Unsupported OS"),
             }
         }
 
-        async fn addFileMacosx(self: *Self, file_path: []const u8, value: V) !?V {
+        async fn addFileKEvent(self: *Self, file_path: []const u8, value: V) !?V {
             const resolved_path = try os.path.resolve(self.channel.loop.allocator, file_path);
             var resolved_path_consumed = false;
             defer if (!resolved_path_consumed) self.channel.loop.allocator.free(resolved_path);
@@ -871,7 +879,11 @@ pub fn Watch(comptime V: type) type {
             var close_op_consumed = false;
             defer if (!close_op_consumed) close_op.finish();
 
-            const flags = posix.O_SYMLINK | posix.O_EVTONLY;
+            
+            const flags = switch (builtin.os) {
+                builtin.Os.macosx => posix.O_SYMLINK | posix.O_EVTONLY,
+                else => 0,
+            };
             const mode = 0;
             const fd = try await (async openPosix(self.channel.loop, resolved_path, flags, mode) catch unreachable);
             close_op.setHandle(fd);
std/event/loop.zig
@@ -48,7 +48,7 @@ pub const Loop = struct.{
         };
 
         pub const EventFd = switch (builtin.os) {
-            builtin.Os.macosx => MacOsEventFd,
+            builtin.Os.macosx, builtin.Os.freebsd => KEventFd,
             builtin.Os.linux => struct.{
                 base: ResumeNode,
                 epoll_op: u32,
@@ -61,13 +61,13 @@ pub const Loop = struct.{
             else => @compileError("unsupported OS"),
         };
 
-        const MacOsEventFd = struct.{
+        const KEventFd = struct.{
             base: ResumeNode,
             kevent: posix.Kevent,
         };
 
         pub const Basic = switch (builtin.os) {
-            builtin.Os.macosx => MacOsBasic,
+            builtin.Os.macosx, builtin.Os.freebsd => KEventBasic,
             builtin.Os.linux => struct.{
                 base: ResumeNode,
             },
@@ -77,7 +77,7 @@ pub const Loop = struct.{
             else => @compileError("unsupported OS"),
         };
 
-        const MacOsBasic = struct.{
+        const KEventBasic = struct.{
             base: ResumeNode,
             kev: posix.Kevent,
         };
@@ -213,7 +213,7 @@ pub const Loop = struct.{
                     self.extra_threads[extra_thread_index] = try os.spawnThread(self, workerRun);
                 }
             },
-            builtin.Os.macosx => {
+            builtin.Os.macosx, builtin.Os.freebsd => {
                 self.os_data.kqfd = try os.bsdKQueue();
                 errdefer os.close(self.os_data.kqfd);
 
@@ -368,7 +368,7 @@ pub const Loop = struct.{
                 os.close(self.os_data.epollfd);
                 self.allocator.free(self.eventfd_resume_nodes);
             },
-            builtin.Os.macosx => {
+            builtin.Os.macosx, builtin.Os.freebsd => {
                 os.close(self.os_data.kqfd);
                 os.close(self.os_data.fs_kqfd);
             },
@@ -483,7 +483,7 @@ pub const Loop = struct.{
             const eventfd_node = &resume_stack_node.data;
             eventfd_node.base.handle = next_tick_node.data;
             switch (builtin.os) {
-                builtin.Os.macosx => {
+                builtin.Os.macosx, builtin.Os.freebsd => {
                     const kevent_array = (*[1]posix.Kevent)(&eventfd_node.kevent);
                     const empty_kevs = ([*]posix.Kevent)(undefined)[0..0];
                     _ = os.bsdKEvent(self.os_data.kqfd, kevent_array, empty_kevs, null) catch {
@@ -545,6 +545,7 @@ pub const Loop = struct.{
         switch (builtin.os) {
             builtin.Os.linux,
             builtin.Os.macosx,
+            builtin.Os.freebsd,
             => self.os_data.fs_thread.wait(),
             else => {},
         }
@@ -609,7 +610,7 @@ pub const Loop = struct.{
                     os.posixWrite(self.os_data.final_eventfd, wakeup_bytes) catch unreachable;
                     return;
                 },
-                builtin.Os.macosx => {
+                builtin.Os.macosx, builtin.Os.freebsd => {
                     self.posixFsRequest(&self.os_data.fs_end_request);
                     const final_kevent = (*[1]posix.Kevent)(&self.os_data.final_kevent);
                     const empty_kevs = ([*]posix.Kevent)(undefined)[0..0];
@@ -667,7 +668,7 @@ pub const Loop = struct.{
                         }
                     }
                 },
-                builtin.Os.macosx => {
+                builtin.Os.macosx, builtin.Os.freebsd => {
                     var eventlist: [1]posix.Kevent = undefined;
                     const empty_kevs = ([*]posix.Kevent)(undefined)[0..0];
                     const count = os.bsdKEvent(self.os_data.kqfd, empty_kevs, eventlist[0..], null) catch unreachable;
@@ -730,7 +731,7 @@ pub const Loop = struct.{
         self.beginOneEvent(); // finished in posixFsRun after processing the msg
         self.os_data.fs_queue.put(request_node);
         switch (builtin.os) {
-            builtin.Os.macosx => {
+            builtin.Os.macosx, builtin.Os.freebsd => {
                 const fs_kevs = (*[1]posix.Kevent)(&self.os_data.fs_kevent_wake);
                 const empty_kevs = ([*]posix.Kevent)(undefined)[0..0];
                 _ = os.bsdKEvent(self.os_data.fs_kqfd, fs_kevs, empty_kevs, null) catch unreachable;
@@ -800,7 +801,7 @@ pub const Loop = struct.{
                         else => unreachable,
                     }
                 },
-                builtin.Os.macosx => {
+                builtin.Os.macosx, builtin.Os.freebsd => {
                     const fs_kevs = (*[1]posix.Kevent)(&self.os_data.fs_kevent_wait);
                     var out_kevs: [1]posix.Kevent = undefined;
                     _ = os.bsdKEvent(self.os_data.fs_kqfd, fs_kevs, out_kevs[0..], null) catch unreachable;
@@ -812,7 +813,7 @@ pub const Loop = struct.{
 
     const OsData = switch (builtin.os) {
         builtin.Os.linux => LinuxOsData,
-        builtin.Os.macosx => MacOsData,
+        builtin.Os.macosx, builtin.Os.freebsd => KEventData,
         builtin.Os.windows => struct.{
             io_port: windows.HANDLE,
             extra_thread_count: usize,
@@ -820,7 +821,7 @@ pub const Loop = struct.{
         else => struct.{},
     };
 
-    const MacOsData = struct.{
+    const KEventData = struct.{
         kqfd: i32,
         final_kevent: posix.Kevent,
         fs_kevent_wake: posix.Kevent,
std/os/freebsd/index.zig
@@ -7,6 +7,10 @@ const arch = switch (builtin.arch) {
 pub use @import("syscall.zig");
 pub use @import("errno.zig");
 
+const std = @import("../../index.zig");
+const c = std.c;
+pub const Kevent = c.Kevent;
+
 pub const PATH_MAX = 1024;
 
 pub const STDIN_FILENO = 0;
@@ -293,6 +297,156 @@ pub const DT_LNK = 10;
 pub const DT_SOCK = 12;
 pub const DT_WHT = 14;
 
+/// add event to kq (implies enable)
+pub const EV_ADD = 0x0001;
+
+/// delete event from kq
+pub const EV_DELETE = 0x0002;
+
+/// enable event
+pub const EV_ENABLE = 0x0004;
+
+/// disable event (not reported)
+pub const EV_DISABLE = 0x0008;
+
+/// only report one occurrence
+pub const EV_ONESHOT = 0x0010;
+
+/// clear event state after reporting
+pub const EV_CLEAR = 0x0020;
+
+/// force immediate event output
+/// ... with or without EV_ERROR
+/// ... use KEVENT_FLAG_ERROR_EVENTS
+///     on syscalls supporting flags
+pub const EV_RECEIPT = 0x0040;
+
+/// disable event after reporting
+pub const EV_DISPATCH = 0x0080;
+
+pub const EVFILT_READ = -1;
+pub const EVFILT_WRITE = -2;
+
+/// attached to aio requests
+pub const EVFILT_AIO = -3;
+
+/// attached to vnodes
+pub const EVFILT_VNODE = -4;
+
+/// attached to struct proc
+pub const EVFILT_PROC = -5;
+
+/// attached to struct proc
+pub const EVFILT_SIGNAL = -6;
+
+/// timers
+pub const EVFILT_TIMER = -7;
+
+/// Process descriptors
+pub const EVFILT_PROCDESC = -8;
+
+/// Filesystem events
+pub const EVFILT_FS = -9;
+
+pub const EVFILT_LIO = -10;
+
+/// User events
+pub const EVFILT_USER = -11;
+
+/// Sendfile events
+pub const EVFILT_SENDFILE = -12;
+
+pub const EVFILT_EMPTY = -13;
+
+/// On input, NOTE_TRIGGER causes the event to be triggered for output.
+pub const NOTE_TRIGGER = 0x01000000;
+
+/// ignore input fflags
+pub const NOTE_FFNOP = 0x00000000;
+
+/// and fflags
+pub const NOTE_FFAND = 0x40000000;
+
+/// or fflags
+pub const NOTE_FFOR = 0x80000000;
+
+/// copy fflags
+pub const NOTE_FFCOPY = 0xc0000000;
+
+/// mask for operations
+pub const NOTE_FFCTRLMASK = 0xc0000000;
+pub const NOTE_FFLAGSMASK = 0x00ffffff;
+
+
+/// low water mark
+pub const NOTE_LOWAT = 0x00000001;
+
+/// behave like poll()
+pub const NOTE_FILE_POLL = 0x00000002;
+
+/// vnode was removed
+pub const NOTE_DELETE = 0x00000001;
+
+/// data contents changed
+pub const NOTE_WRITE = 0x00000002;
+
+/// size increased
+pub const NOTE_EXTEND = 0x00000004;
+
+/// attributes changed
+pub const NOTE_ATTRIB = 0x00000008;
+
+/// link count changed
+pub const NOTE_LINK = 0x00000010;
+
+/// vnode was renamed
+pub const NOTE_RENAME = 0x00000020;
+
+/// vnode access was revoked
+pub const NOTE_REVOKE = 0x00000040;
+
+/// vnode was opened
+pub const NOTE_OPEN = 0x00000080;
+
+/// file closed, fd did not allow write
+pub const NOTE_CLOSE = 0x00000100;
+
+/// file closed, fd did allow write
+pub const NOTE_CLOSE_WRITE = 0x00000200;
+
+/// file was read
+pub const NOTE_READ = 0x00000400;
+
+/// process exited
+pub const NOTE_EXIT = 0x80000000;
+
+/// process forked
+pub const NOTE_FORK = 0x40000000;
+
+/// process exec'd
+pub const NOTE_EXEC = 0x20000000;
+
+/// mask for signal & exit status
+pub const NOTE_PDATAMASK = 0x000fffff;
+pub const NOTE_PCTRLMASK = (~NOTE_PDATAMASK);
+
+/// data is seconds
+pub const NOTE_SECONDS = 0x00000001;
+
+/// data is milliseconds
+pub const NOTE_MSECONDS = 0x00000002;
+
+/// data is microseconds
+pub const NOTE_USECONDS = 0x00000004;
+
+/// data is nanoseconds
+pub const NOTE_NSECONDS = 0x00000008;
+
+/// timeout is absolute
+pub const NOTE_ABSTIME = 0x00000010;
+
+
+
 pub const TCGETS = 0x5401;
 pub const TCSETS = 0x5402;
 pub const TCSETSW = 0x5403;
@@ -445,7 +599,11 @@ pub fn symlink(existing: [*]const u8, new: [*]const u8) usize {
 }
 
 pub fn pread(fd: i32, buf: [*]u8, count: usize, offset: usize) usize {
-    return arch.syscall4(SYS_pread, usize(fd), @ptrToInt(buf), count, offset);
+    return arch.syscall4(SYS_pread, @intCast(usize, fd), @ptrToInt(buf), count, offset);
+}
+
+pub fn preadv(fd: i32, iov: [*]const iovec, count: usize, offset: usize) usize {
+    return arch.syscall4(SYS_preadv, @intCast(usize, fd), @ptrToInt(iov), count, offset);
 }
 
 pub fn pipe(fd: *[2]i32) usize {
@@ -464,6 +622,10 @@ pub fn pwrite(fd: i32, buf: [*]const u8, count: usize, offset: usize) usize {
     return arch.syscall4(SYS_pwrite, @intCast(usize, fd), @ptrToInt(buf), count, offset);
 }
 
+pub fn pwritev(fd: i32, iov: [*]const iovec_const, count: usize, offset: usize) usize {
+    return arch.syscall4(SYS_pwritev, @intCast(usize, fd), @ptrToInt(iov), count, offset);
+}
+
 pub fn rename(old: [*]const u8, new: [*]const u8) usize {
     return arch.syscall2(SYS_rename, @ptrToInt(old), @ptrToInt(new));
 }
@@ -590,3 +752,51 @@ pub const timespec = arch.timespec;
 pub fn fstat(fd: i32, stat_buf: *Stat) usize {
     return arch.syscall2(SYS_fstat, @intCast(usize, fd), @ptrToInt(stat_buf));
 }
+
+pub const iovec = extern struct.{
+    iov_base: [*]u8,
+    iov_len: usize,
+};
+
+pub const iovec_const = extern struct.{
+    iov_base: [*]const u8,
+    iov_len: usize,
+};
+
+pub fn kqueue() usize {
+    return errnoWrap(c.kqueue());
+}
+
+pub fn kevent(kq: i32, changelist: []const Kevent, eventlist: []Kevent, timeout: ?*const timespec) usize {
+    return errnoWrap(c.kevent(
+        kq,
+        changelist.ptr,
+        @intCast(c_int, changelist.len),
+        eventlist.ptr,
+        @intCast(c_int, eventlist.len),
+        timeout,
+    ));
+}
+
+pub fn sysctl(name: [*]c_int, namelen: c_uint, oldp: ?*c_void, oldlenp: ?*usize, newp: ?*c_void, newlen: usize) usize {
+    return errnoWrap(c.sysctl(name, namelen, oldp, oldlenp, newp, newlen));
+}
+
+pub fn sysctlbyname(name: [*]const u8, oldp: ?*c_void, oldlenp: ?*usize, newp: ?*c_void, newlen: usize) usize {
+    return errnoWrap(c.sysctlbyname(name, oldp, oldlenp, newp, newlen));
+}
+
+pub fn sysctlnametomib(name: [*]const u8, mibp: ?*c_int, sizep: ?*usize) usize {
+    return errnoWrap(c.sysctlnametomib(name, wibp, sizep));
+}
+
+
+
+/// Takes the return value from a syscall and formats it back in the way
+/// that the kernel represents it to libc. Errno was a mistake, let's make
+/// it go away forever.
+fn errnoWrap(value: isize) usize {
+    return @bitCast(usize, if (value == -1) -isize(c._errno().*) else value);
+}
+
+
std/os/get_app_data_dir.zig
@@ -43,7 +43,7 @@ pub fn getAppDataDir(allocator: *mem.Allocator, appname: []const u8) GetAppDataD
             };
             return os.path.join(allocator, home_dir, "Library", "Application Support", appname);
         },
-        builtin.Os.linux => {
+        builtin.Os.linux, builtin.Os.freebsd => {
             const home_dir = os.getEnvPosix("HOME") orelse {
                 // TODO look in /etc/passwd
                 return error.AppDataDirUnavailable;
std/os/index.zig
@@ -421,7 +421,7 @@ pub fn posix_pwritev(fd: i32, iov: [*]const posix.iovec_const, count: usize, off
                 }
             }
         },
-        builtin.Os.linux => while (true) {
+        builtin.Os.linux, builtin.Os.freebsd => while (true) {
             const rc = posix.pwritev(fd, iov, count, offset);
             const err = posix.getErrno(rc);
             switch (err) {
@@ -689,7 +689,7 @@ pub fn getBaseAddress() usize {
             };
             return phdr - @sizeOf(ElfHeader);
         },
-        builtin.Os.macosx => return @ptrToInt(&std.c._mh_execute_header),
+        builtin.Os.macosx, builtin.Os.freebsd => return @ptrToInt(&std.c._mh_execute_header),
         builtin.Os.windows => return @ptrToInt(windows.GetModuleHandleW(null)),
         else => @compileError("Unsupported OS"),
     }
@@ -1307,7 +1307,7 @@ pub fn deleteDirC(dir_path: [*]const u8) DeleteDirError!void {
             const dir_path_w = try windows_util.cStrToPrefixedFileW(dir_path);
             return deleteDirW(&dir_path_w);
         },
-        Os.linux, Os.macosx, Os.ios => {
+        Os.linux, Os.macosx, Os.ios, Os.freebsd => {
             const err = posix.getErrno(posix.rmdir(dir_path));
             switch (err) {
                 0 => return,
@@ -1350,7 +1350,7 @@ pub fn deleteDir(dir_path: []const u8) DeleteDirError!void {
             const dir_path_w = try windows_util.sliceToPrefixedFileW(dir_path);
             return deleteDirW(&dir_path_w);
         },
-        Os.linux, Os.macosx, Os.ios => {
+        Os.linux, Os.macosx, Os.ios, Os.freebsd => {
             const dir_path_c = try toPosixPath(dir_path);
             return deleteDirC(&dir_path_c);
         },
@@ -1467,7 +1467,7 @@ pub const Dir = struct.{
     allocator: *Allocator,
 
     pub const Handle = switch (builtin.os) {
-        Os.macosx, Os.ios => struct.{
+        Os.macosx, Os.ios, Os.freebsd => struct.{
             fd: i32,
             seek: i64,
             buf: []u8,
@@ -1543,7 +1543,7 @@ pub const Dir = struct.{
                         .name_data = undefined,
                     };
                 },
-                Os.macosx, Os.ios => Handle.{
+                Os.macosx, Os.ios, Os.freebsd => Handle.{
                     .fd = try posixOpen(
                         dir_path,
                         posix.O_RDONLY | posix.O_NONBLOCK | posix.O_DIRECTORY | posix.O_CLOEXEC,
@@ -1574,7 +1574,7 @@ pub const Dir = struct.{
             Os.windows => {
                 _ = windows.FindClose(self.handle.handle);
             },
-            Os.macosx, Os.ios, Os.linux => {
+            Os.macosx, Os.ios, Os.linux, Os.freebsd => {
                 self.allocator.free(self.handle.buf);
                 os.close(self.handle.fd);
             },
@@ -1589,6 +1589,7 @@ pub const Dir = struct.{
             Os.linux => return self.nextLinux(),
             Os.macosx, Os.ios => return self.nextDarwin(),
             Os.windows => return self.nextWindows(),
+            Os.freebsd => return self.nextFreebsd(),
             else => @compileError("unimplemented"),
         }
     }
@@ -1728,6 +1729,11 @@ pub const Dir = struct.{
             };
         }
     }
+
+    fn nextFreebsd(self: *Dir) !?Entry {
+        self.handle.buf = try self.allocator.alloc(u8, page_size);
+        return null; // TODO
+    }
 };
 
 pub fn changeCurDir(allocator: *Allocator, dir_path: []const u8) !void {
@@ -2166,7 +2172,7 @@ pub fn unexpectedErrorWindows(err: windows.DWORD) UnexpectedError {
 pub fn openSelfExe() !os.File {
     switch (builtin.os) {
         Os.linux => return os.File.openReadC(c"/proc/self/exe"),
-        Os.macosx, Os.ios => {
+        Os.macosx, Os.ios, Os.freebsd => {
             var buf: [MAX_PATH_BYTES]u8 = undefined;
             const self_exe_path = try selfExePath(&buf);
             buf[self_exe_path.len] = 0;
@@ -2183,7 +2189,7 @@ pub fn openSelfExe() !os.File {
 
 test "openSelfExe" {
     switch (builtin.os) {
-        Os.linux, Os.macosx, Os.ios, Os.windows => (try openSelfExe()).close(),
+        Os.linux, Os.macosx, Os.ios, Os.windows, Os.freebsd => (try openSelfExe()).close(),
         else => return error.SkipZigTest, // Unsupported OS.
     }
 }
@@ -2214,6 +2220,7 @@ pub fn selfExePathW(out_buffer: *[windows_util.PATH_MAX_WIDE]u16) ![]u16 {
 pub fn selfExePath(out_buffer: *[MAX_PATH_BYTES]u8) ![]u8 {
     switch (builtin.os) {
         Os.linux => return readLink(out_buffer, "/proc/self/exe"),
+        Os.freebsd => return readLink(out_buffer, "/proc/curproc/file"),
         Os.windows => {
             var utf16le_buf: [windows_util.PATH_MAX_WIDE]u16 = undefined;
             const utf16le_slice = try selfExePathW(&utf16le_buf);
@@ -2252,7 +2259,7 @@ pub fn selfExeDirPath(out_buffer: *[MAX_PATH_BYTES]u8) ![]const u8 {
             // will not return null.
             return path.dirname(full_exe_path).?;
         },
-        Os.windows, Os.macosx, Os.ios => {
+        Os.windows, Os.macosx, Os.ios, Os.freebsd => {
             const self_exe_path = try selfExePath(out_buffer);
             // Assume that the OS APIs return absolute paths, and therefore dirname
             // will not return null.
@@ -3085,10 +3092,13 @@ pub const CpuCountError = error.{
 
 pub fn cpuCount(fallback_allocator: *mem.Allocator) CpuCountError!usize {
     switch (builtin.os) {
-        builtin.Os.macosx => {
+        builtin.Os.macosx, builtin.Os.freebsd => {
             var count: c_int = undefined;
             var count_len: usize = @sizeOf(c_int);
-            const rc = posix.sysctlbyname(c"hw.logicalcpu", @ptrCast(*c_void, &count), &count_len, null, 0);
+            const rc = posix.sysctlbyname(switch (builtin.os) {
+                builtin.Os.macosx => c"hw.logicalcpu",
+                else => c"hw.ncpu",
+            }, @ptrCast(*c_void, &count), &count_len, null, 0);
             const err = posix.getErrno(rc);
             switch (err) {
                 0 => return @intCast(usize, count),
CMakeLists.txt
@@ -444,6 +444,7 @@ set(ZIG_STD_FILES
     "buffer.zig"
     "build.zig"
     "c/darwin.zig"
+    "c/freebsd.zig"
     "c/index.zig"
     "c/linux.zig"
     "c/windows.zig"