mirror of
https://github.com/ziglang/zig.git
synced 2025-12-06 22:33:08 +00:00
58f961f4cb
This adds a special CWD file descriptor, AT.FDCWD (-2), to refer to the current working directory. The `*at(...)` functions look for this and resolve relative paths against the stored CWD. Absolute paths are dynamically matched against the stored Preopens. "os.initPreopensWasi()" must be called before std.os functions will resolve relative or absolute paths correctly. This is asserted at runtime. Support has been added for: `open`, `rename`, `mkdir`, `rmdir`, `chdir`, `fchdir`, `link`, `symlink`, `unlink`, `readlink`, `fstatat`, `access`, and `faccessat`. This also includes limited support for `getcwd()` and `realpath()`. These return an error if the CWD does not correspond to a Preopen with an absolute path. They also do not currently expand symlinks.
122 lines
2.9 KiB
Zig
122 lines
2.9 KiB
Zig
const std = @import("../std.zig");
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const wasi = std.os.wasi;
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const FDFLAG = wasi.FDFLAG;
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extern threadlocal var errno: c_int;
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pub fn _errno() *c_int {
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return &errno;
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}
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pub const AT = wasi.AT;
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pub const CLOCK = wasi.CLOCK;
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pub const E = wasi.E;
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pub const IOV_MAX = wasi.IOV_MAX;
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pub const LOCK = wasi.LOCK;
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pub const S = wasi.S;
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pub const STDERR_FILENO = wasi.STDERR_FILENO;
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pub const STDIN_FILENO = wasi.STDIN_FILENO;
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pub const STDOUT_FILENO = wasi.STDOUT_FILENO;
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pub const fd_t = wasi.fd_t;
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pub const pid_t = c_int;
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pub const uid_t = u32;
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pub const gid_t = u32;
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pub const off_t = i64;
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pub const ino_t = wasi.ino_t;
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pub const mode_t = wasi.mode_t;
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pub const time_t = wasi.time_t;
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pub const timespec = wasi.timespec;
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pub const Stat = extern struct {
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dev: i32,
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ino: ino_t,
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nlink: u64,
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mode: mode_t,
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uid: uid_t,
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gid: gid_t,
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__pad0: isize,
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rdev: i32,
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size: off_t,
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blksize: i32,
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blocks: i64,
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atim: timespec,
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mtim: timespec,
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ctim: timespec,
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pub fn atime(self: @This()) timespec {
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return self.atim;
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}
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pub fn mtime(self: @This()) timespec {
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return self.mtim;
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}
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pub fn ctime(self: @This()) timespec {
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return self.ctim;
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}
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};
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/// Derived from
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/// https://github.com/WebAssembly/wasi-libc/blob/main/expected/wasm32-wasi/predefined-macros.txt
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pub const O = struct {
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pub const ACCMODE = (EXEC | RDWR | SEARCH);
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pub const APPEND = @as(u32, FDFLAG.APPEND);
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pub const CLOEXEC = (0);
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pub const CREAT = ((1 << 0) << 12); // = __WASI_OFLAGS_CREAT << 12
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pub const DIRECTORY = ((1 << 1) << 12); // = __WASI_OFLAGS_DIRECTORY << 12
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pub const DSYNC = @as(u32, FDFLAG.DSYNC);
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pub const EXCL = ((1 << 2) << 12); // = __WASI_OFLAGS_EXCL << 12
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pub const EXEC = (0x02000000);
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pub const NOCTTY = (0);
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pub const NOFOLLOW = (0x01000000);
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pub const NONBLOCK = @as(u32, FDFLAG.NONBLOCK);
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pub const RDONLY = (0x04000000);
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pub const RDWR = (RDONLY | WRONLY);
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pub const RSYNC = @as(u32, FDFLAG.RSYNC);
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pub const SEARCH = (0x08000000);
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pub const SYNC = @as(u32, FDFLAG.SYNC);
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pub const TRUNC = ((1 << 3) << 12); // = __WASI_OFLAGS_TRUNC << 12
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pub const TTY_INIT = (0);
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pub const WRONLY = (0x10000000);
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};
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pub const F = struct {
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pub const GETFD = 1;
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pub const SETFD = 2;
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pub const GETFL = 3;
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pub const SETFL = 4;
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};
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pub const FD_CLOEXEC = 1;
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pub const F_OK = 0;
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pub const X_OK = 1;
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pub const W_OK = 2;
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pub const R_OK = 4;
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pub const SEEK = struct {
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pub const SET: wasi.whence_t = .SET;
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pub const CUR: wasi.whence_t = .CUR;
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pub const END: wasi.whence_t = .END;
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};
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pub const nfds_t = usize;
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pub const pollfd = extern struct {
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fd: fd_t,
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events: i16,
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revents: i16,
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};
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pub const POLL = struct {
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pub const RDNORM = 0x1;
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pub const WRNORM = 0x2;
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pub const IN = RDNORM;
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pub const OUT = WRNORM;
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pub const ERR = 0x1000;
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pub const HUP = 0x2000;
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pub const NVAL = 0x4000;
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};
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