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| author | Arnold D. Robbins <arnold@skeeve.com> | 2016-04-06 05:54:19 +0300 |
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| committer | Arnold D. Robbins <arnold@skeeve.com> | 2016-04-06 05:54:19 +0300 |
| commit | cfb773bb093dadfa715816c75d438f97e387e71a (patch) | |
| tree | 293aedc7402a7c1e25af42f235133ce9caa77b25 /doc/gawk.texi | |
| parent | db6e8faca70e60d2fa80e0affda3d9bef1e82eae (diff) | |
| download | egawk-cfb773bb093dadfa715816c75d438f97e387e71a.tar.gz egawk-cfb773bb093dadfa715816c75d438f97e387e71a.tar.bz2 egawk-cfb773bb093dadfa715816c75d438f97e387e71a.zip | |
Allow r/w for a partially closed two-way pipe to be nonfatal.
Diffstat (limited to 'doc/gawk.texi')
| -rw-r--r-- | doc/gawk.texi | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/doc/gawk.texi b/doc/gawk.texi index 77bec7d1..fd71dbc9 100644 --- a/doc/gawk.texi +++ b/doc/gawk.texi @@ -27859,9 +27859,16 @@ your program to hang. (Thus, this particular feature is of much less use in practice than being able to close the @code{"to"} end.) @quotation CAUTION -It is a fatal error to write to the @code{"to"} end of a two-way -pipe which has been closed. It is also a fatal error to read +Normally, +it is a fatal error to write to the @code{"to"} end of a two-way +pipe which has been closed, and it is also a fatal error to read from the @code{"from"} end of a two-way pipe that has been closed. + +You may set @code{PROCINFO["@var{command}", "NONFATAL"]} to +make such operations become nonfatal, in which case you then need +to check @code{ERRNO} after each @code{print}, @code{printf}, +or @code{getline}. +@xref{Nonfatal}, for more information. @end quotation @cindex @command{gawk}, @code{PROCINFO} array in |