34.23. Dangers of the sed Quit CommandThe sed quit command, q (Section 34.22), is very useful for getting sed to stop processing any more input once you've done what you want. However, you need to be very careful not to use q in any sed script that writes its edits back to the original file. After q is executed, no further output is produced. It should not be used in any case where you want to edit the front of the file and pass the remainder through unchanged. Using q in this case is a dangerous beginner's mistake. -- TOR Copyright © 2003 O'Reilly & Associates. All rights reserved. |
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