1 files changed, 85 insertions, 0 deletions
diff --git a/src/c.zig b/src/c.zig
index 1ac7f44ea..967d1dea6 100644
--- a/src/c.zig
+++ b/src/c.zig
@@ -4,3 +4,88 @@ pub usingnamespace switch (std.Target.current.os.tag) {
     .macos => @import("./darwin_c.zig"),
     else => struct {},
 };
+
+usingnamespace std.c;
+const builtin = @import("builtin");
+const os = std.os;
+const mem = std.mem;
+const Stat = std.fs.File.Stat;
+const Kind = std.fs.File.Kind;
+const StatError = std.fs.File.StatError;
+const errno = os.errno;
+const zeroes = mem.zeroes;
+
+pub extern "c" fn chmod([*c]const u8, mode_t) c_int;
+pub extern "c" fn fchmod(c_int, mode_t) c_int;
+pub extern "c" fn umask(mode_t) mode_t;
+pub extern "c" fn fchmodat(c_int, [*c]const u8, mode_t, c_int) c_int;
+
+pub extern "c" fn lstat([*c]const u8, [*c]libc_stat) c_int;
+pub extern "c" fn lstat64([*c]const u8, [*c]libc_stat) c_int;
+
+pub fn lstat_absolute(path: [:0]const u8) StatError!Stat {
+    if (builtin.os.tag == .windows) {
+        var io_status_block: windows.IO_STATUS_BLOCK = undefined;
+        var info: windows.FILE_ALL_INFORMATION = undefined;
+        const rc = windows.ntdll.NtQueryInformationFile(self.handle, &io_status_block, &info, @sizeOf(windows.FILE_ALL_INFORMATION), .FileAllInformation);
+        switch (rc) {
+            .SUCCESS => {},
+            .BUFFER_OVERFLOW => {},
+            .INVALID_PARAMETER => unreachable,
+            .ACCESS_DENIED => return error.AccessDenied,
+            else => return windows.unexpectedStatus(rc),
+        }
+        return Stat{
+            .inode = info.InternalInformation.IndexNumber,
+            .size = @bitCast(u64, info.StandardInformation.EndOfFile),
+            .mode = 0,
+            .kind = if (info.StandardInformation.Directory == 0) .File else .Directory,
+            .atime = windows.fromSysTime(info.BasicInformation.LastAccessTime),
+            .mtime = windows.fromSysTime(info.BasicInformation.LastWriteTime),
+            .ctime = windows.fromSysTime(info.BasicInformation.CreationTime),
+        };
+    }
+
+    var st = zeroes(libc_stat);
+    switch (errno(lstat64(path.ptr, &st))) {
+        .SUCCESS => {},
+        // .EINVAL => unreachable,
+        .BADF => unreachable, // Always a race condition.
+        .NOMEM => return error.SystemResources,
+        .ACCES => return error.AccessDenied,
+        else => |err| return os.unexpectedErrno(err),
+    }
+
+    const atime = st.atime();
+    const mtime = st.mtime();
+    const ctime = st.ctime();
+    return Stat{
+        .inode = st.ino,
+        .size = @bitCast(u64, st.size),
+        .mode = st.mode,
+        .kind = switch (builtin.os.tag) {
+            .wasi => switch (st.filetype) {
+                os.FILETYPE_BLOCK_DEVICE => Kind.BlockDevice,
+                os.FILETYPE_CHARACTER_DEVICE => Kind.CharacterDevice,
+                os.FILETYPE_DIRECTORY => Kind.Directory,
+                os.FILETYPE_SYMBOLIC_LINK => Kind.SymLink,
+                os.FILETYPE_REGULAR_FILE => Kind.File,
+                os.FILETYPE_SOCKET_STREAM, os.FILETYPE_SOCKET_DGRAM => Kind.UnixDomainSocket,
+                else => Kind.Unknown,
+            },
+            else => switch (st.mode & os.S_IFMT) {
+                os.S_IFBLK => Kind.BlockDevice,
+                os.S_IFCHR => Kind.CharacterDevice,
+                os.S_IFDIR => Kind.Directory,
+                os.S_IFIFO => Kind.NamedPipe,
+                os.S_IFLNK => Kind.SymLink,
+                os.S_IFREG => Kind.File,
+                os.S_IFSOCK => Kind.UnixDomainSocket,
+                else => Kind.Unknown,
+            },
+        },
+        .atime = @as(i128, atime.tv_sec) * std.time.ns_per_s + atime.tv_nsec,
+        .mtime = @as(i128, mtime.tv_sec) * std.time.ns_per_s + mtime.tv_nsec,
+        .ctime = @as(i128, ctime.tv_sec) * std.time.ns_per_s + ctime.tv_nsec,
+    };
+}