shtool-subst (1) Linux Manual Page

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 [at] 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).

Index