Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Logical OR in shell script
Top Forums UNIX for Dummies Questions & Answers Logical OR in shell script Post 302923292 by figaro on Friday 31st of October 2014 07:13:45 PM
Old 10-31-2014
Logical OR in shell script
I have code as follows to perform some validations on C++ and Javascript files:
Code:
if [ "$ext" -eq "cpp" ] || [ "$ext" -eq "h" ] || [ "$ext" -eq "js" ]; then

However, when I want to add other extensions as well, say "py" or "sql", then the repeated OR starts to look contrived. I know I can use the -o operator to abbreviate the code a little bit, but isn't there a more terse way to perform checks like these? Perhaps a standard membership-of-array function?
Last edited by figaro; 10-31-2014 at 08:14 PM.. Reason: Replaced $# with $ext
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to do logical AND and logical OR with grep

Hi can someone please help me on this. I need to perform this code: Grep any lines that meets the following criteria (A AND B) OR (A AND C) I tried this code, but it didn't work Grep-I "A &&B" | "A&&C" *.* $ thanks in advance (12 Replies)
Discussion started by: Needhelp2
12 Replies

2. Shell Programming and Scripting

Logical AND in shell commands

Hi:confused:, I have a file that contains : +-----------------------------------------------------------------------------+ LABEL: super1_fix EFIX FILES: 1 ABSTRACT: epkg for touch command PRE-REQUISITES: no PACKAGER VERSION: 7 REBOOT REQUIRED: no BUILD BOOT... (4 Replies)
Discussion started by: vijaya2006
4 Replies

3. Shell Programming and Scripting

How to implement the logical express --- A(B+C) within single "if" statment in shell script?

On Linux OS, bash environment, I want implement the following code: if && ( || ) A,B,C represents some compare conditions. How to realize it ? Thanks! (1 Reply)
Discussion started by: qcmao
1 Replies

4. Shell Programming and Scripting

nested logical expression in bash shell

Please tell me how to nest logical expressions in bash. I would like to nest logical expressions for arguments of the "test" command on bash. The following pseudo-code shows my intention. // pseudo code if (exp1 AND (exp2 OR exp3)) { Output true; } else { Output false; } ... (11 Replies)
Discussion started by: LessNux
11 Replies

5. Shell Programming and Scripting

SH Script for Logical OR function

Using good ole fashion bourne shell scripting I have to take 2 files and compare them 1:1 in a Logical OR "gate" or function and then output the info into a 3rd file. I have never tried anything like this before :eek: so any hand holding will be much "Thanked" OR Gate being: A, B, Result 0,... (2 Replies)
Discussion started by: Alivadoro
2 Replies

6. Shell Programming and Scripting

Logical expression in POSIX compliant Korn Shell

Hi, i want to check if a variable var1 is not a or b or c pseudo code: If NOT (var1 = a or var1 = b or var1 = c) then ... fi I want to use POSIX complaint Korn shell, and for string comparison For the following code, logical.sh #!/usr/bin/ksh var="j" echo "Var : $var" if ! { || ||... (12 Replies)
Discussion started by: ysrini
12 Replies

7. Shell Programming and Scripting

Shell grammar question: logical OR in test

Hi, I am trying to check if two input files exist before the rest of the scripts is run. Following is the code that I have but it gives me syntax error. if then echo "File not found" else echo "File found" fi (3 Replies)
Discussion started by: nua7
3 Replies

8. Shell Programming and Scripting

Unable to pass shell script variable to awk command in same shell script

I have a shell script (.sh) and I want to pass a parameter value to the awk command but I am getting exception, please assist. diff=$1$2.diff id=$2 new=new_$diff echo "My id is $1" echo "I want to sync for user account $id" ##awk command I am using is as below cat $diff | awk... (2 Replies)
Discussion started by: Ashunayak
2 Replies

9. UNIX for Dummies Questions & Answers

How to write Config shell script to pass variables in master shell script?

Dear Unix gurus, We have a config shell script file which has 30 variables which needs to be passed to master unix shell script that invokes oracle database sessions. So those 30 variables need to go through the database sessions (They are inputs) via a shell script. one of the variable name... (1 Reply)
Discussion started by: dba1981
1 Replies

10. Shell Programming and Scripting

How to write config shell script to pass variables in master shell script?

Dear Unix gurus, We have a config shell script file which has 30 variables which needs to be passed to master unix shell script that invokes oracle database sessions. So those 30 variables need to go through the database sessions (They are inputs) via a shell script. one of the variable name... (1 Reply)
Discussion started by: dba1981
1 Replies

LEARN ABOUT SUNOS

gst-launch-ext-0.8

gst-launch-ext-0.8(1)						   User Commands					     gst-launch-ext-0.8(1)

NAME

       gst-launch-ext-0.8, gst-launch-ext - run a predefined GStreamer pipeline

SYNOPSIS

       gst-launch-ext-0.8 filename [filename...] [gst-std-options]

       gst-launch-ext filename [filename...] [gst-std-options]

DESCRIPTION

       gst-launch-ext-0.8  runs  a  basic predefined GStreamer pipeline, and prints the name of the pipeline. gst-launch-ext-0.8 is only used as a
       quick test to ensure that codecs and GStreamer work properly. gst-launch-ext-0.8 does not handle more advanced features	such  as  synchro-
       nization.

OPTIONS

       The following options are supported by gst-launch-ext-0.8 and gst-launch-ext:

       gst-std-options		       Standard  options  available  for  use  with  most GStreamer applications.  See gst-std-options(5) for more
				       information.

       The following options are supported by gst-launch-ext only:

       --gst-list-mm   List found major/minor versions. This option displays the versions that are available.

       --gst-mm=string Force major/minor version. This option enables you to specify a specific version to run, if you do  not	want  to  run  the
		       default version.

       --print	       Print wrapped command line. This option displays the command that will be run, and then runs the command.

OPERANDS

       The following operands are supported:

       filename        The name of the GStreamer pipeline to run.

EXTENDED DESCRIPTION

       gst-launch-ext-0.8  can	be  configured by creating a .gst file in your home directory. This PERL-style configuration file can override the
       default values for audio and video output sinks.

       The following example .gst file implements the same defaults as those hard-coded in the script:

       AUDIOSINK = osssink
       VIDEOSINK = ffmpegcolorspace ! xvimagesink

       You can change osssink to esdsink, alsasink, or sunaudiosink, and you can change xvimagesink to ximagesink, aasink,  or	sdlvideosink.  You
       must have the appropriate plugin installed on the system to use the specified output sink. Other GStreamer plug-ins can also be used.

EXAMPLES

       Example 1: Launching a GStreamer Pipeline

       example% gst-launch-ext-0.8 filename

EXIT STATUS

       The following exit values are returned:

       0	Application exited successfully

       >0	Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/gst-launch-ext-Executable to run a predefined GStreamer pipeline

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-media		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |External			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Latest version of the GNOME Desktop User Guide for your platform.

       gst-complete(1),  gst-compprep(1),  gst-feedback(1),  gst-inspect(1), gst-launch(1), gst-md5sum(1), gst-register(1), gst-thumbnail(1), gst-
       typefind(1), gst-xmlinspect(1), gst-xmllaunch(1), gstreamer-properties(1), libgstreamer-0.8(3), libgstgetbits(3), gst-std-options(5)

NOTES

       Written by Brian Cameron, Sun Microsystems Inc., 2004.

SunOS 5.10							    14 Oct 2004 					     gst-launch-ext-0.8(1)
All times are GMT -4. The time now is 02:36 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy