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Diffstat (limited to 'doc/coreutils.texi')
| -rw-r--r-- | doc/coreutils.texi | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index 8034807a4..0e28f4971 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -13019,6 +13019,11 @@ so it works with @command{zsh}, @command{bash}, and @command{ksh}, but not with @command{/bin/sh}. So if you write code like this in a shell script, be sure to start the script with @samp{#!/bin/bash}. +Note also that if any of the process substitutions (or piped stdout) +might exit early without consuming all the data, the @option{-p} option +is needed to allow @command{tee} to continue to process the input +to any remaining outputs. + Since the above example writes to one file and one process, a more conventional and portable use of @command{tee} is even better: @@ -13087,6 +13092,17 @@ tar chof - "$tardir" \ | bzip2 -9 -c > your-pkg-M.N.tar.bz2 @end example +If you want to further process the output from process substitutions, +and those processes write atomically (i.e., write less than the system's +PIPE_BUF size at a time), that's possible with a construct like: + +@example +tardir=your-pkg-M.N +tar chof - "$tardir" \ + | tee >(md5sum --tag) > >(sha256sum --tag) \ + | sort | gpg --clearsign > your-pkg-M.N.tar.sig +@end example + @exitstatus |