Sponsored Content
Top Forums Shell Programming and Scripting How to auto correct a failing command? Post 302989911 by mohtashims on Thursday 19th of January 2017 06:18:48 PM
Old 01-19-2017
Hammer & Screwdriver

Quote:
Originally Posted by Corona688
See, I don't think that actually helps you. There are systems where echo -e literally prints -e. Theoretically this script could detect and warn you when your code is broken, but it doesn't actually make your code portable. There's places -e is needed, places it's not, and places where echo never does what you want.

If you want your script to be portable, write it portably.

There is a command which handles escapes properly everywhere, in every shell: printf. Rewrite using printf instead of echo -e. Just a blind substitution won't work of course, you need to add an \n.

As an alternative for grep -o , awk.
My requirement is less to play with the syntax of the command and moreso to use a different utility like ggrep or GNU grep for failing commands.

Can you suggest a good similar feasible solution ?
 

10 More Discussions You Might Find Interesting

1. HP-UX

dd command failing

I am new to HP-UX. I have an 8GB drive that is my root drive, contained in a Volume Group. I would like to clone that drive to another drive, which is 18.4GB. The other drive is not in a volume group. I am using this simple command:# dd if=/dev/dsk/c0t6d0 of=/dev/dsk/c0t5d0The command... (4 Replies)
Discussion started by: emsecrist
4 Replies

2. UNIX for Dummies Questions & Answers

Is this grep command correct?

Hi I need to know if I have got the following grep command correct. I wanted to find from myfile.txt all signed real numbers (e.g. +5.0, -78, but not 5.0, 5 are not). I have thought about it and decided it was this: grep '' myfile.txt but I was wondering if this was correct. If... (2 Replies)
Discussion started by: rushhour
2 Replies

3. Shell Programming and Scripting

tty command failing

We have script like this in the .bash_profile.. #-# determine if session is interactive or in background if ]; then while true; do read -p "Do you wish to load profile yes or no?" yn case $yn in * ) source /opt/oracle/.profile; break;; * ) break;; *... (2 Replies)
Discussion started by: talashil
2 Replies

4. Shell Programming and Scripting

For loop failing cd command

Hi guys, i've wrote the following loop; for i in `ls` do cd $i/host cat "xxxx.txt" |grep "yyyy" >> zzzz.txt done I have a set of folder with different name and i need to extract a value from a file contained in the host subfolder ( that is present in each folder). When i run... (4 Replies)
Discussion started by: cecco16
4 Replies

5. UNIX for Advanced & Expert Users

I was trying this command...am I going correct? other there is better way

I was trying to copy all debs from apt cache to some storage location and I was taking this approach... /var/cache/apt/archives# ls -1 | grep -v jdownloader | fgrep .deb | xargs cp /media/eshant/L-STORE/Softwares/openjdk/an error bla_bla.deb is a not directory stalled me Suggestions please... (9 Replies)
Discussion started by: ezee
9 Replies

6. Post Here to Contact Site Administrators and Moderators

Auto correct a csv file using UNIX shell script.

Hi All, There are list of 4-5 .csv files which has 12 columns.In some cases one of the record is split into 2 records. What needs to be done is this split record has to be auto corrected and placed in the csv file. Eg: Let us consider sample.csv file and in normal conditions the file... (1 Reply)
Discussion started by: karthik_ak
1 Replies

7. Shell Programming and Scripting

Auto correct a csv file using UNIX shell script.

Hi All, There are list of 4-5 .csv files which has 12 columns.In some cases one of the record is split into 2 records. What needs to be done is this split record has to be auto corrected and placed in the csv file. Eg: Let us consider sample.csv file and in normal conditions the file would... (40 Replies)
Discussion started by: karthik_ak
40 Replies

8. UNIX for Dummies Questions & Answers

While trying to load .so file manually using command its failing

Hi all, I am newbie to linux environment. I was trying to run an .so file manually which in turn call a method in bin folder. Command given, XXX_MODULES=libxxx.so /opt/servicename/bin/methodname -Le -c /opt/servicename/etc/methodname/methodname.conf -n -C -t -m "" When i tried to... (1 Reply)
Discussion started by: sharathpadman
1 Replies

9. UNIX for Advanced & Expert Users

While trying to load .so file manually using command its failing

Hi all, I am newbie to linux environment. I was trying to run an .so file manually which in turn call a method in bin folder. Command given, XXX_MODULES=libxxx.so /opt/servicename/bin/methodname -Le -c /opt/servicename/etc/methodname/methodname.conf -n -C -t -m "" When i tried to execute... (1 Reply)
Discussion started by: sharathpadman
1 Replies

10. Shell Programming and Scripting

LS command does not list the correct file

Hi, I am logged into as root & inside the home directory of another user. ls -a # ls -laq total 44 drwx------ 4 user1 adm 4096 Nov 23 05:10 . drwxr-xr-x. 12 root root 4096 Nov 22 13:05 .. -rw-r--r-- 1 user1 adm 18 Nov 22 13:05 .bash_logout -rw-r--r-- 1 user1 adm 193 Nov... (2 Replies)
Discussion started by: mohtashims
2 Replies
SHTOOL-ECHO.TMP(1)					      GNU Portable Shell Tool						SHTOOL-ECHO.TMP(1)

NAME
shtool-echo - GNU shtool echo(1) extensional command SYNOPSIS
shtool echo [-n|--newline] [-e|--expand] string DESCRIPTION
shtool echo is an echo(1) style command which prints string to stdout and optionally provides special expansion constructs (terminal bold mode, environment details, date, etc) and newline control. The trick of this command is that it provides a portable -n option and hides the gory details needed to find out the environment details under option -e. OPTIONS
The following command line options are available. -n, --newline By default, output is written to stdout followed by a "newline" (ASCII character 0x0a). If option -n is used, this newline character is omitted. -e, --expand If option -e is used, string can contain special "%x" constructs which are expanded before the output is written. Currently the following constructs are recognized: %B switch terminal mode to bold display mode. %b switch terminal mode back to normal display mode. %u the current user name. %U the current user id (numerical). %g the current group name. %G the current group id (numerical). %h the current hostname (without any domain extension). %d the current domain name. %D the current day of the month. %M the current month (numerical). %m the current month name. %Y the current year. EXAMPLE
# shell script shtool echo -n -e "Enter your name [%B%u%b]: "; read name shtool echo -e "Your Email address might be %u@%h%d" shtool echo -e "The current date is %D-%m-%Y" HISTORY
The GNU shtool echo command was originally written by Ralf S. Engelschall <rse@engelschall.com> in 1998 for Website META Language (WML) under the name buildinfo. It was later taken over into GNU shtool. SEE ALSO
shtool(1), echo(1). 18-Jul-2008 shtool 2.0.8 SHTOOL-ECHO.TMP(1)
All times are GMT -4. The time now is 03:20 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy