Function fchmod [src]

Changes the mode of the file referred to by the file descriptor. The process must have the correct privileges in order to do this successfully, or must have the effective user ID matching the owner of the file.

Prototype

pub fn fchmod(fd: fd_t, mode: mode_t) FChmodError!void

Parameters

fd: fd_tmode: mode_t

Possible Errors

AccessDenied

FileNotFound

InputOutput

PermissionDenied

ReadOnlyFileSystem

SymLinkLoop

SystemResources

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 fchmod(fd: fd_t, mode: mode_t) FChmodError!void {
    if (!fs.has_executable_bit) @compileError("fchmod unsupported by target OS");

    while (true) {
        const res = system.fchmod(fd, mode);
        switch (errno(res)) {
            .SUCCESS => return,
            .INTR => continue,
            .BADF => unreachable,
            .FAULT => unreachable,
            .INVAL => unreachable,
            .ACCES => return error.AccessDenied,
            .IO => return error.InputOutput,
            .LOOP => return error.SymLinkLoop,
            .NOENT => return error.FileNotFound,
            .NOMEM => return error.SystemResources,
            .NOTDIR => return error.FileNotFound,
            .PERM => return error.PermissionDenied,
            .ROFS => return error.ReadOnlyFileSystem,
            else => |err| return unexpectedErrno(err),
        }
    }
}  