[CWB] [ cwb-Bugs-3427282 ] CQP output redirect doesn't always check SIGPIPE

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Bugs item #3427282, was opened at 2011-10-22 13:05
Message generated for change (Comment added) made by nobody
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Category: CQP interface
Group: None
Status: Open
Resolution: None
Priority: 4
Private: No
Submitted By: Stefan Evert (schtepf)
Assigned to: Stefan Evert (schtepf)
Summary: CQP output redirect doesn't always check SIGPIPE

Initial Comment:
When redirecting "cat;" output to a pipe, CQP installs a signal handler to check for broken pipe signals, so the output loop can be aborted (important e.g. when displaying a large query result in the interactive pager).  Other output commands with redirect – count, tabulate, etc. – fail to do so.

The signal handler code should be merged into the open_stream() and close_stream() functions in <cqp/output.h>.  All CQP output commands that support redirects through this mechanism will then only have to check the global variable broken_pipe<cqp/output.h>.

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