Originally Posted by Mannu2525;303000147but my variables are not resolving in sed (using bash shell)
The reason is that the single quotes into which you put the sed-statement(s) are prventing exactly that (the expansion of variables. Try the following:
You can use variables by "interrupting" the quotes. Suppose the following simple sed-script which replaces "old" with "new" - notice the quotation, by which after the variable expansion a single string is guaranteed:
Note, that variables might contain characters which have a meaning for sed. Suppose the variable "search" would contain a slash:
This would break the sed-statement, because the slash would alter the statement itself. Therefore you need to check carefully what your variables contains before using it as part of a sed-statement.
I have configured my solaris 9 box to obtain a IP from the DHCP server which is on windows, I have also set up the DNS with domain name and name servers under /etc/resolv.conf
I can ping a ip address I just cant seem to ping hostnames, theres probaly something im not doing. I have looked through... (9 Replies)
Hello,
i have another sed question.. I'm trying to do variable substition with sed and i'm running into a problem.
my var1 is a string constructed like this:
filename1 filerev1 filepath1
my var2 is another string constructed like this:
filename2 filerev2 filepath2
when i do... (2 Replies)
I want to instert Category:XXXXX into the 2. line
something like this should work, but I have somewhere the wrong sytanx. something with the linebreak goes wrong:
sed "2i\\${n}Category:$cat\n"
Sample:
Titel Blahh Blahh abllk sdhsd sjdhf
Blahh Blah Blahh
Blahh
Should look like... (2 Replies)
Hello everyone....
I am trying to dinamically create variable names and do resolution of this vars contents.
After that is done I want to use (via a function call) the var and its contents by referring to it via the variable name.
I am having a hard time achieving this .... can you help ?
... (5 Replies)
I'm trying to make a sed substitution where the substitution pattern is an environment variable to be expanded, but the variable contains a "slash".
sed -e 's/<HOME_DIRECTORY>/'$HOME'/'This gives me the following error:
sed: -e expression #1, char 21: unknown option to `s'Obviously this is... (2 Replies)
Hi all,
Hereby wish to have your advise for below:
Main concept is
I intend to get current directory of my script file.
This script file will be copied to /etc/init.d.
A string in this copy will be replaced with current directory value.
Below is original script file:
... (6 Replies)
Hi,
I an having some environment variables exported and the variable name is present in the file. But its not resolving with following commands. Can someone throw some light.
db $ grep -v "^#" TD_FWK_NUCLEUS.dbc | grep -v "^$" | xargs -i echo {}
wb_bin: ${TD_FWK_NUCLEUS_DBC_WB_BIN_TAG}
I... (3 Replies)
Friends,
I trying to get the unix path fro a config file. There are 100 + path variables defined in the master_config.sh. Like this ;
app_dir=/project/emp
abc_dir=${app_dir}/abc/app
abc_common=${abc_dir}/common
abc_common_base=${abc_common}/base... (2 Replies)
Discussion started by: arunv123
2 Replies
LEARN ABOUT DEBIAN
shtool-subst
SHTOOL-SUBST.TMP(1) GNU Portable Shell Tool SHTOOL-SUBST.TMP(1)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).
18-Jul-2008 shtool 2.0.8 SHTOOL-SUBST.TMP(1)