v0.3

• Added a new waitall program that lets you specify programs by name, rather than by PID (this is similar to what killall(1) does).
• Switched from the GNU GPL v3 license to the BSD 2-clause license.
• Minor changes:
  • The --verbose option displays a warning if ptrace(2) is not available.

v0.2

• Added support for waiting multiple PIDs.
• The new --verbose option can be specified both to inspect the exit status of the traced processes and to trace the signals sent to them.
• waitpid can now be used even if ptrace(2) is not available (through --verbose won't report exit statuses and signals in this situation).
• A new --force option has been added to allow the specification of nonexistent PIDs.

v0.1

Initial release.