Function fstatatZ [src]

Same as fstatat but pathname is null-terminated. See also fstatat.

Prototype

pub fn fstatatZ(dirfd: fd_t, pathname: [*:0]const u8, flags: u32) FStatAtError!Stat

Parameters

dirfd: fd_tpathname: [*:0]const u8flags: u32

Possible Errors

In WASI, this error may occur when the file descriptor does not hold the required rights to get its filestat information.

FileNotFound

InvalidUtf8

WASI-only; file paths must be valid UTF-8.

NameTooLong

PermissionDenied FStatError

SymLinkLoop

SystemResources FStatError

Unexpected UnexpectedError

The Operating System returned an undocumented error code.

This error is in theory not possible, but it would be better to handle this error than to invoke undefined behavior.

When this error code is observed, it usually means the Zig Standard Library needs a small patch to add the error code to the error set for the respective function.

Source

  pub fn fstatatZ(dirfd: fd_t, pathname: [*:0]const u8, flags: u32) FStatAtError!Stat {
    if (native_os == .wasi and !builtin.link_libc) {
        const filestat = try std.os.fstatat_wasi(dirfd, mem.sliceTo(pathname, 0), .{
            .SYMLINK_FOLLOW = (flags & AT.SYMLINK_NOFOLLOW) == 0,
        });
        return Stat.fromFilestat(filestat);
    }

    const fstatat_sym = if (lfs64_abi) system.fstatat64 else system.fstatat;
    var stat = mem.zeroes(Stat);
    switch (errno(fstatat_sym(dirfd, pathname, &stat, flags))) {
        .SUCCESS => return stat,
        .INVAL => unreachable,
        .BADF => unreachable, // Always a race condition.
        .NOMEM => return error.SystemResources,
        .ACCES => return error.AccessDenied,
        .PERM => return error.PermissionDenied,
        .FAULT => unreachable,
        .NAMETOOLONG => return error.NameTooLong,
        .LOOP => return error.SymLinkLoop,
        .NOENT => return error.FileNotFound,
        .NOTDIR => return error.FileNotFound,
        .ILSEQ => |err| if (native_os == .wasi)
            return error.InvalidUtf8
        else
            return unexpectedErrno(err),
        else => |err| return unexpectedErrno(err),
    }
}  