Function waitpid [src]

Use this version of the waitpid wrapper if you spawned your child process using explicit fork and execve method.

Prototype

pub fn waitpid(pid: pid_t, flags: u32) WaitPidResult

Parameters

pid: pid_tflags: u32

Source

  pub fn waitpid(pid: pid_t, flags: u32) WaitPidResult {
    var status: if (builtin.link_libc) c_int else u32 = undefined;
    while (true) {
        const rc = system.waitpid(pid, &status, @intCast(flags));
        switch (errno(rc)) {
            .SUCCESS => return .{
                .pid = @intCast(rc),
                .status = @bitCast(status),
            },
            .INTR => continue,
            .CHILD => unreachable, // The process specified does not exist. It would be a race condition to handle this error.
            .INVAL => unreachable, // Invalid flags.
            else => unreachable,
        }
    }
}  