Function tcgetpgrp [src]

Returns the process group ID for the TTY associated with the given handle.

Prototype

pub fn tcgetpgrp(handle: fd_t) TermioGetPgrpError!pid_t

Parameters

handle: fd_t

Possible Errors

NotATerminal TIOCError

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 tcgetpgrp(handle: fd_t) TermioGetPgrpError!pid_t {
    while (true) {
        var pgrp: pid_t = undefined;
        switch (errno(system.tcgetpgrp(handle, &pgrp))) {
            .SUCCESS => return pgrp,
            .BADF => unreachable,
            .INVAL => unreachable,
            .INTR => continue,
            .NOTTY => return error.NotATerminal,
            else => |err| return unexpectedErrno(err),
        }
    }
}  