NAME
shtool-subst - GNU shtool sed(1) substitution operations
SYNOPSIS
shtool subst [-v|--verbose] [-t|--trace] [-n|--nop] [-w|--warning]
[-q|--quiet] [-s|--stealth] [-i|--interactive] [-b|--backup ext]
[-e|--exec cmd] [-f|--file cmd-file] [file] [file ...]
DESCRIPTION
This command applies one or more sed(1) substitution operations to
stdin or any number of files.
OPTIONS
The following command line options are available.
-v, --verbose
Display some processing information.
-t, --trace
Enable the output of the essential shell commands which are
executed.
-n, --nop
No operation mode. Actual execution of the essential shell commands
which would be executed is suppressed.
-w, --warning
Show warning on substitution operation resulting in no content
change on every file. The default is to show a warning on
substitution operations resulted in no content change on all files.
-q, --quiet
Suppress warning on substitution operation resulting in no content
change.
-s, --stealth
Stealth operation. Preserve timestamp on file.
-i, --interactive
Enter interactive mode where the user has to approve each
operation.
-b, --backup ext
Preserve backup of original file using file name extension ext.
Default is to overwrite the original file.
-e, --exec cmd
Specify sed(1) command directly.
-f, --file cmd-file
Read sed(1) command from file.
EXAMPLE
# shell script
shtool subst -i -e 's;(c) \([0-9]*\)-2000;(c) \1-2001;' *.[ch]
# RPM spec-file
%install
shtool subst -v -n \
-e 's;^\(prefix=\).*;\1 $RPM_BUILD_ROOT%{_prefix};g' \
-e 's;^\(sysconfdir=\).*;\1 $RPM_BUILD_ROOT%{_prefix}/etc;g' \
`find . -name Makefile -print`
make install
HISTORY
The GNU shtool subst command was originally written by Ralf S.
Engelschall <rse@engelschall.com> in 2001 for GNU shtool. It was
prompted by the need to have a uniform and convenient patching frontend
to sed(1) operations in the OpenPKG package specifications.
SEE ALSO
shtool(1), sed(1).