Check for Empty Command Argument Post: 302136746

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

how to check if the argument contain wildcard (*,?) ?

In a script , i would like to check if the argument ( $1, $2 inside the script) contain wildcard (*,? etc). how do i do it? > script_name arg1 arg* $1 (arg1) does not contain wildcard, but $2 (arg* )contains wildcard. how can i tell in script? i need to do this is because : if arg1...

2. Shell Programming and Scripting

How can I make the for command check to see if a file is empty before executing?

Here is the command in question for f in $(<uploads); do . I only want this to execute if uploads is not empty. If uploads is empty I want the script to quit, actually before the for command. If its not apparent uploads is a text file. Chris

3. Shell Programming and Scripting

Check for empty string

Hello All, I have written shell script whcih at the max 3 parameters. When only one commandline argument and other two command line arguments are passed as empty string like eg : archive ' ' ' ' Then i need to check whether the commandline...

4. Shell Programming and Scripting

check if file is empty

How do I check if a file is empty in a sh script I want to test in my shell script if the output file is empty and if it is do one thing and if it isnt empty do another? any ideas?

5. Shell Programming and Scripting

check whether the directory is empty or not

I have the list of users in user.log, under each user folder there is sub1 folder is there. i want to check whether sub1 is empty or not, if it is empty i have to skip that user user folder and iterate next user folders. i have the sample code,its not giving not proper results. while read line...

6. Shell Programming and Scripting

check empty directory !!!

I need to check if a directory is empty using an if condition in the pseudocode below if ; then else although i looked at a few forums on this topic, I left feeling a little unclear and i could not use the command successfully what can i substitute in the if conditon above,...

7. Shell Programming and Scripting

Cannot compare argument in if statement in csh/grep command if argument starts with �-�

If ($argv == “-debug”) then Echo “in loop” Endif But this is not working. If I modify this code and remove “-“, then it works. Similarly I am getting problem using grep command also Grep “-debug” Filename Can someone please help me on how to resolve these...

8. Shell Programming and Scripting

How to check whether a variable is empty or contains some value?

hi, i want to check whether a a variable contains some value or is empty in a shell script. so if the variable contains some value i want to do some job and if the variable doesnt contain any value then i need to skip that job. here is a sample script read_filenames.sh contains ...

9. Shell Programming and Scripting

Argument check

All, I'm writing an argument checking block and running into an error. I want to confirm that $1 is one of two values. Here is what I have: if ]; then echo -e "\nPlease check your first augument. You used \"$1\" which is not recognized. Please see usage:" usage ...

10. Shell Programming and Scripting

Cant check empty string

Hello So i have that script collection, in which i have a single script to create a configuration file. In there, i have multiple occourences of something like this: prj_title=$(tui-read "What is the TITLE? ($prj_name):") ] && prj_title="${prj_name/_/ }" They all work as expected, if...

LEARN ABOUT SUNOS

check-permissions

check-permissions(1M)					  System Administration Commands				     check-permissions(1M)

NAME

       check-permissions - check permissions on mail rerouting files

SYNOPSIS

       /usr/sbin/check-permissions [login]

DESCRIPTION

       The   check-permissions script is intended as a migration aid for sendmail(1M). It checks the /etc/mail/sendmail.cf file for all configured
       alias files, and checks the alias files for :include: files. It also checks for certain .forward files. For each file  that   check-permis-
       sions checks, it verifies that none of the parent directories are group- or world-writable. If any directories are overly permissive, it is
       reported. Otherwise it reports that no unsafe directories were found.

       As to which .forward files are checked, it depends on the arguments included on the command line. If no	argument  is  given,  the  current
       user's home directory is checked for the presence of a  .forward file. If any arguments are given, they are assumed to be valid logins, and
       the home directory of each one is checked.

       If the special argument ALL is given,  the passwd entry in the  /etc/nsswitch.conf file is checked, and all password entries  that  can	be
       obtained through the switch file are checked. In large domains, this can be time-consuming.

OPERANDS

       The following operands are supported:

       login	       Where login is a valid user name, checks the home directory for	login.

       ALL	       Checks the home directory of  all users.

FILES

       /etc/mail/sendmail.cf   Defines enviornment for	sendmail

       /etc/mail/aliases       Ascii mail aliases file

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsndmu 		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getent(1M), sendmail(1M), aliases(4), attributes(5)

SunOS 5.10							    10 Nov 2003 					     check-permissions(1M)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

how to check if the argument contain wildcard (*,?) ?

Discussion started by: gusla

2. Shell Programming and Scripting

How can I make the for command check to see if a file is empty before executing?

Discussion started by: chrchcol

3. Shell Programming and Scripting

Check for empty string

Discussion started by: rahman_riyaz

4. Shell Programming and Scripting

check if file is empty

Discussion started by: stolz