Adding Text To |bc Output


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Adding Text To |bc Output
# 8  
Old 04-22-2010
Quote:
echo $((2+2)) MB
Works with /usr/bin/sh on modern HP-UX because this "sh" is now the POSIX shell not the old Bourne Shell.


Quote:
&& = AND
|| = OR

Not in this context.
a=`echo '2+2' | bc` && echo $a MB
The author is checking that the "bc" ran without error then using echo to output the formatted result.

Quote from "man ksh".
The symbol && (||) causes the list following it to be executed only if the preceding pipeline returns a zero (non-zero) value.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Adding hostname on the output

// AIX 6.1 pcmpath query device |awk 'BEGIN{print "TYPE\tDEVICE NAME\tSERIAL\tSIZE"} /DEVICE/ {disk=$5 printf "%s\t", $7 printf "%s\t", disk getline; printf "%s\t", substr($2, length($2)-3) ("bootinfo -s "... (2 Replies)
Discussion started by: Daniel Gate
2 Replies

2. Shell Programming and Scripting

Adding more text to a variable

Is there a more simple way to add text to a variable I havevar="blue" and like to add green to getecho $var blue green Here is how I do it. var=$(echo "${var} green") ---------- Post updated at 13:23 ---------- Previous update was at 13:12 ---------- :o Uff Not always easy to see the... (2 Replies)
Discussion started by: Jotne
2 Replies

3. Shell Programming and Scripting

adding text with sed

sed 's/<\/body>/<A HREF='"$index"'>'"$description"'<\/A>\ <\/body>/' "$index" This will work from the command prompt, but not from my ksh script. Why not? sed: command garbled: s/<\/body>/<A HREF=/accounts/students/b/bmwg6c/public_html/index.html>I would like to call it white... (4 Replies)
Discussion started by: robin_simple
4 Replies

4. Shell Programming and Scripting

Adding and then separating the output

Hi I have this output /vol/vol0 4GB /vol/nonprod00 682GB /vol/prod00 3GB /vol/nasp_archive 201GB /vol/nasp_iface 92GB /vol/nasp_bsi 0GB /vol/nasp_vertex 0GB /vol/nasp_sapmnt_mp2 1GB /vol/nasp_sapmnt_prd 52GB /vol/nasp_sapmnt_srp 1GB /vol/nasp_smd 1GB /vol/nasp_ccms 0GB... (8 Replies)
Discussion started by: bombcan
8 Replies

5. Shell Programming and Scripting

adding text before and after a word

Hello, I have a list: i.e: 40331786 50331787 30331788 30331789 30331790 50331791 50331792 50331793 70331794 70331795 70331796 ... ... and I need to add text before and after each number: (2 Replies)
Discussion started by: drbiloukos
2 Replies

6. Shell Programming and Scripting

Adding text into file

Hello, I after some assistance please. Below is a file I need to read and for each line write an output. My input file looks like this 2 20008 2003-08-26 2 20032 2003-08-26 2 20041 2003-08-26 2 20037 2003-08-26 2 20050 2003-08-26 6 ... (6 Replies)
Discussion started by: giles.cardew
6 Replies

7. Shell Programming and Scripting

[bash help]Adding multiple lines of text into a specific spot into a text file

I am attempting to insert multiple lines of text into a specific place in a text file based on the lines above or below it. For example, Here is a portion of a zone file. IN NS ns1.domain.tld. IN NS ns2.domain.tld. IN ... (2 Replies)
Discussion started by: cdn_humbucker
2 Replies

8. Shell Programming and Scripting

adding another field to SED output

Dear experts, I have a file called "check" with contents like below i used the sed command like below to get the value of "success" and "failed" only My question is how can i get the value to include the time "03:15", so that i can get a value such as below : - Appreciate... (4 Replies)
Discussion started by: aismann
4 Replies

9. Shell Programming and Scripting

adding text to a file

Hi All I am making a script in which.I have a problem i try to discribe. File1 content need to be append in file 2 but such as if content already exist then dont add. File1 IS Like this myname yourname hername hisname File2 %AddNameHere myname yourname hername hisname (3 Replies)
Discussion started by: aliahsan81
3 Replies

10. Shell Programming and Scripting

Adding specific text and spaces to each line in a text file

Hi, I wanted to add specific text to each row in a text file containing three rows. Example: 0 8 7 6 5 5 7 8 9 0 7 9 7 8 9 0 1 2 And I want to add a 21 at the beginning of the first row, and blank spaces at the beginning of the second two rows. To get this: 21 0 8 7 6 5 5 7 8... (4 Replies)
Discussion started by: hertingm
4 Replies
Login or Register to Ask a Question
escape(1)                                                       Mail Avenger 0.8.3                                                       escape(1)

NAME
escape - escape shell special characters in a string SYNOPSIS
escape string DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result. EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string: $ var='; echo gotcha!' $ eval echo hi $var hi gotcha! $ Using escape, one can avoid executing the contents of $var: $ eval echo hi `escape "$var"` hi ; echo gotcha! $ A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient: #!/bin/sh formail -x to -x cc -x resent-to -x resent-cc | fgrep "$1" > /dev/null && exit 0 echo "<$1>.. address does not accept blind carbon copies" exit 100 To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt script: bodytest reject_bcc `escape "$RECIPIENT"` SEE ALSO
avenger(1), The Mail Avenger home page: <http://www.mailavenger.org/>. BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells. AUTHOR
David Mazieres Mail Avenger 0.8.3 2012-04-05 escape(1)