yash-cli-0.3.0

[0.3.0] - 2025-03-23

Added

• The shell now supports declaration utilities as defined in POSIX.
• The cd built-in now supports the -e option as defined in POSIX.
• The read built-in now supports the -d (--delimiter) option, which allows
  specifying a delimiter character to terminate the input.
• The trap built-in now implements the POSIX.1-2024 behavior of showing
  signal dispositions that are not explicitly set by the user. It also supports
  the -p (--print) option.
• The -p option for the command built-in now works on Linux.

Changed

• When a foreground job is suspended in an interactive shell, the shell now
  discards any remaining commands in the current command line and prompts for
  the next command line. This behavior basically conforms to POSIX.1-2024, but
  differs in that the shell does not resume with the remaining commands
  following the next asynchronous and-or list.
• When the shell starts job control, if it is in the background, the shell now
  suspends itself until it is resumed in the foreground. Previously, the shell
  would continue running in the background, interfering with the foreground
  process group.
• If job control is enabled and the shell does not have a controlling terminal,
  the shell now proceeds without managing foreground-ness of process groups.
  Jobs are still assigned to their own process groups. Previously, the shell
  would abort command execution in this case.
• The cd built-in now errors out when a given operand is an empty string.
• The cd built-in now returns different exit statuses for different errors.
• The fg and bg built-ins now error out if job control is not enabled.
• The command kill -l now shows signals in the ascending order of their
  numbers.
• The read built-in now returns a more specific exit status depending on the
  cause of the error. It also rejects an input containing a null byte.
• The output of the trap built-in now includes not only user-defined traps but
  also signal dispositions that are not explicitly set by the user.
• The wait built-in no longer treats suspended jobs as terminated jobs. When
  waiting for a suspended job, the built-in now waits indefinitely until the job
  is resumed and finished.