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psub(1)                              fish                              psub(1)




NAME

       psub - perform process substitution


   Synopsis
       COMMAND1 (COMMAND2|psub [-f])

   Description
       Posix shells feature a syntax that is a mix between command
       substitution and piping, called process substitution. It is used to
       send the output of a command into the calling command, much like
       command substitution, but with the difference that the output is not
       sent through commandline arguments but through a named pipe, with the
       filename of the named pipe sent as an argument to the calling program.
       The psub shellscript function, which when combined with a regular
       command substitution provides the same functionality.

       If the -f or --file switch is given to psub, psub will use a regular
       file instead of a named pipe to communicate with the calling process.
       This will cause psub to be significantly slower when large amounts of
       data are involved, but has the advantage that the reading process can
       seek in the stream.

   Example
       diff (sort a.txt|psub) (sort b.txt|psub) shows the difference between
       the sorted versions of files a.txt and b.txt.



Version 1.23.1                    8 Mar 2009                           psub(1)

fish 1.23.1 - Generated Sun Mar 8 14:14:41 CDT 2009
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