Script from fragment


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Script from fragment
# 1  
Old 06-18-2018
Question Script from fragment

Dear friends,
I wrote a bash fragment that displays the a file, or creates a file with intermediate directories in the absence of such a file.
Code:
[[ -e FILE ]] && cat FILE || touch FILE

I want to do the same thing, but in bash script.
May you explain me how to do that kind of thing.
Thank you very-very much!
P.S I'm a newbie in bash!
This User Gave Thanks to Jake999 For This Post:
# 2  
Old 06-18-2018
This works in bash:

Code:
#!/bin/bash
FILE=somefile
[[ -e $FILE ]] && cat $FILE || touch $FILE

Long form:

Code:
#!/bin/bash
FILE=somefile
if [[  -e $FILE ]]; then
   cat $FILE
else
   touch $FILE
fi

Notice we use a variable FILE=something, to reference it use $FILE

Last edited by jim mcnamara; 06-18-2018 at 12:54 PM..
This User Gave Thanks to jim mcnamara For This Post:
# 3  
Old 06-18-2018
Mate, thank you SOOOOO MUCH!
wish you all the best!

Last edited by Jake999; 06-18-2018 at 01:20 PM..
Login or Register to Ask a Question

Previous Thread | Next Thread

8 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to block first bash script until second bash script script launches web server/site?

I'm new to utilities like socat and netcat and I'm not clear if they will do what I need. I have a "compileDeployStartWebServer.sh" script and a "StartBrowser.sh" script that are started by emacs/elisp at the same time in two different processes. I'm using Cygwin bash on Windows 10. My... (3 Replies)
Discussion started by: siegfried
3 Replies

2. Shell Programming and Scripting

Shell script works fine as a standalone script but not as part of a bigger script

Hello all, I am facing a weird issue while executing a code below - #!/bin/bash cd /wload/baot/home/baotasa0/sandboxes_finance/ext_ukba_bde/pset sh UKBA_publish.sh UKBA 28082015 3 if then echo "Param file conversion for all the areas are completed, please check in your home directory"... (2 Replies)
Discussion started by: ektubbe
2 Replies

3. HP-UX

About Block Size and Fragment Size

Accordingly a lot of manuals - if you have block size 8KB and trying to write a 1KB file to the block, as result you waste 7KB of the block space. But recently I noticed about Fragments of File Block. In same case if you have File Block 8KB and Fragment size 1KB - you can save your block space,... (6 Replies)
Discussion started by: jess_t03
6 Replies

4. UNIX for Dummies Questions & Answers

Calling a script from master script to get value from called script

I am trying to call a script(callingscript.sh) from a master script(masterscript.sh) to get string type value from calling script to master script. I have used scripts mentioned below. #masterscript.sh ./callingscript.sh echo $fileExist #callingscript.sh echo "The script is called"... (2 Replies)
Discussion started by: Raj Roy
2 Replies

5. Shell Programming and Scripting

Script will keep checking running status of another script and also restart called script at night

I am using blow script :-- #!/bin/bash FIND=$(ps -elf | grep "snmp_trap.sh" | grep -v grep) #check snmp_trap.sh is running or not if then # echo "process found" exit 0; else echo "process not found" exec /home/Ketan_r /snmp_trap.sh 2>&1 & disown -h ... (1 Reply)
Discussion started by: ketanraut
1 Replies

6. UNIX for Advanced & Expert Users

Physical disk IO size smaller than fragment block filesystem size ?

Hello, in one default UFS filesystem we have 8K block size (bsize) and 1K fragmentsize (fsize). At this scenary I thought all "FileSytem IO" will be 8K (or greater) but never smaller than the fragment size (1K). If a UFS fragment/blocksize is allwasy several ADJACENTS sectors on disk (in a ... (4 Replies)
Discussion started by: rarino2
4 Replies

7. Shell Programming and Scripting

create a shell script that calls another script and and an awk script

Hi guys I have a shell script that executes sql statemets and sends the output to a file.the script takes in parameters executes sql and sends the result to an output file. #!/bin/sh echo " $2 $3 $4 $5 $6 $7 isql -w400 -U$2 -S$5 -P$3 << xxx use $4 go print"**Changes to the table... (0 Replies)
Discussion started by: magikminox
0 Replies

8. Shell Programming and Scripting

code fragment

Hi I'm looking at some old unix code and, need some help figuring out some of the commands. Here is the line that I'm having trouble with: echo "$(date) ${0##*/} started" >> $summary.log I know the first statement prints out the date but, I don't understand the second command on the line... (2 Replies)
Discussion started by: stonemonolith
2 Replies
Login or Register to Ask a Question