Extract delta records using with "comm" and "sort" commands combination Post: 303002046

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Top Forums UNIX for Beginners Questions & Answers Extract delta records using with "comm" and "sort" commands combination Post 303002046 by Don Cragun on Wednesday 16th of August 2017 03:43:54 PM

08-16-2017

Registered User

To expand a little bit on what RudiC already said...

If you're trying to perform process substitution, there can't be any space between the redirection operator and the (utility [argument...]).

To avoid confusion in the future, note that ( and ) are called parentheses; brackets are [ and ] and braces are { and }. Brackets, braces, and parentheses all have distinct meaning in the shell command language; they are not interchangeable.

Note also that process substitution is a fairly new feature in ksh and is not available in all versions of the Korn shell. And, you haven't told us which version of ksh you're using. It was not available in any version of ksh before 1993 and was not in the early version of ksh93. It is in version 93u+ from August 1, 2012, but I am not sure which version first included process substitution.

Don Cragun

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sccsdiff

sccsdiff(1)						      General Commands Manual						       sccsdiff(1)

Name
       sccsdiff - compare and display SCCS delta differences

Syntax
       sccsdiff -rSID1 -rSID2 [-p] [-sn] files

Description
       The  command  compares  two versions of an SCCS file and generates the differences between the two versions.  You can specify any number of
       SCCS files, but arguments apply to all files.

Options
       -p	 Displays output using command.

       -rSID?	 Indicates deltas to be prepared.  Versions are passed to in the order given.

       -sn	 Sets number of lines each segment is to contain.  This is useful when fails due to a high system load.

Diagnostics
       ``file: No differences''
       If the two versions are the same.  Use for explanations.

Files
       temporary files

See Also
       bdiff(1), cmp(1), comm(1), diff(1), diff3(1), diffmk(1), get(1), prs(1), sccs(1), sccshelp(1)
       Guide to the Source Code Control System

																       sccsdiff(1)