This script creates another script. The new script uses sed, so it is quite fast, and the entire process is data-driven by the lookup file:
Code:
#!/usr/bin/env sh
# @(#) s1 Demonstrate creation of sed script with awk.
set -o nounset
echo
## Use local command version for the commands in this demonstration.
echo "(Versions used in this script displayed with local utility "version")"
version bash awk sed
echo
echo " Input file of lookup tokens:"
cat -tv data1
./a1 data1 > script
chmod +x script
echo
echo " This is the created sed script:"
cat -n script
echo
echo " Results of running script:"
./script data2
exit 0
You notice that there is an "a1" script. It's in awk, because awk facilitates handling text fields. However, the quoting is a bit complicated:
Code:
#!/usr/bin/awk -f
# @(#) a1 Demonstrate creation of sed script from lookup file.
echo
BEGIN { print "sed \\" }
{ print "-e 's/" $1 " /" $1$2 " /' \\" }
END { print " data2" }
When s1 runs, it then produces:
Code:
% ./s1
(Versions used in this script displayed with local utility version)
GNU bash, version 2.05b.0(1)-release (i386-pc-linux-gnu)
GNU Awk 3.1.4
GNU sed version 4.1.2
Input file of lookup tokens:
6589 7879
8787 0909
4343 4576
This is the created sed script:
1 sed \
2 -e 's/6589 /65897879 /' \
3 -e 's/8787 /87870909 /' \
4 -e 's/4343 /43434576 /' \
5 data2
Results of running script:
6767879898009965897879 65656576687878
7887576576757687870909 88787878756446
3232476568769843434576 42341242542345
Best wishes ... cheers, drl
I haven't seen anything like this before. Very cool. I will need to play with this.
Hi Friends,
I'm a great fan of this forum... it has helped me tone my skills in shell scripting. I have a challenge here, which I'm sure you guys would help me in achieving...
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File1 - file2 = file3
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58112
wc -l file2.txt
55260
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Shell script logic
Hi
I have 2 input files like with file 1 content as (file1)
"BRGTEST-242" a.txt "BRGTEST-240" a.txt "BRGTEST-219" e.txt
File 2 contents as fle(2)
"BRGTEST-244" a.txt "BRGTEST-244" b.txt "BRGTEST-231" c.txt "BRGTEST-231" d.txt "BRGTEST-221" e.txt
I want to get... (22 Replies)
Discussion started by: pottic
22 Replies
LEARN ABOUT DEBIAN
script
SCRIPT(1) User Commands SCRIPT(1)NAME
script -- make typescript of terminal session
SYNOPSIS
script [-a] [-c command] [-e] [-f] [-q] [-t[=file]] [-V] [-h] [file]
DESCRIPTION
script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive
session as proof of an assignment, as the typescript file can be printed out later with lpr(1).
If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript.
Options:
-a, --append
Append the output to file or typescript, retaining the prior contents.
-c, --command command
Run the command rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves
differently when its stdout is not a tty.
-e, --return
Return the exit code of the child process. Uses the same format as bash termination on signal termination exit code is 128+n.
-f, --flush
Flush output after each write. This is nice for telecooperation: one person does `mkfifo foo; script -f foo', and another can super-
vise real-time what is being done using `cat foo'.
--force
Allow the default output destination, i.e. the typescript file, to be a hard or symbolic link. The command will follow a symbolic
link.
-q, --quiet
Be quiet.
-t, --timing[=file]
Output timing data to standard error, or to file when given. This data contains two fields, separated by a space. The first field
indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time.
This information can be used to replay typescripts with realistic typing and output delays.
-V, --version
Output version information and exit.
-h, --help
Output help and exit.
The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not
set) for the C-shell, csh(1)).
Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate
the screen, the results are meant to emulate a hardcopy terminal.
ENVIRONMENT
The following environment variable is utilized by script:
SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most
shells set this variable automatically).
SEE ALSO csh(1) (for the history mechanism), scriptreplay(1).
HISTORY
The script command appeared in 3.0BSD.
BUGS
Script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects.
AVAILABILITY
The script command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux February 2011 util-linux
10-03-2007
