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Full Discussion: check if directory exists
Top Forums Shell Programming and Scripting check if directory exists Post 74800 by jerardfjay on Monday 13th of June 2005 02:08:23 PM
Old 06-13-2005
check if directory exists
Hi,

I need to prompt for a response from a user to enter a path
Code:
read dest_dir?"Please Enter Directory :"

How do I do this until a valid directory is entered by the user. I can use
Code:
[ -d dest_dir ]

to check the existence of the directory. However when I try the following I cannot get it to work.
Code:
while [ -z $dest_dir ]
do
    read dest_dir?"Please Enter Directory :"
    if [ -d $dest_dir ];
       then
             echo "Invalid directory entered. Please try again"
    fi
done

This is what I am getting as an output when I execute the above piece of code.

test.sh: test: 0403-004 Specify a parameter with this command

What am i doing wrong. Please advise. Thanks.
 

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LEARN ABOUT SUSE

chsh

chsh(1) 						      General Commands Manual							   chsh(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [-D binddn] [-P path] [-s shell] [-l] [-q] [-u] [-v] [user]

DESCRIPTION

       chsh  is  used  to  change  the	user login shell.  A normal user may only change the login shell for their own account, the super user may
       change the login shell for any account.

       If a shell is not given on the command line, chsh operates in an interactive fashion, prompting the user  with  the  current  login  shell.
       Enter  the  new	value  to change the field, or leave the line blank to use the current value. Enter none to remove the current value.  The
       current value is displayed between a pair of [ ] marks.

       The only restrictions placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker  is  the  super-
       user, and then any value may be added.  An account with a restricted login shell may not change their login shell.

       This version of chsh is able to change the shell of local, NIS, NIS+ and LDAP accounts , if the permissions allow it.

OPTIONS

       -D, --binddn binddn
	      Use  the	Distinguished  Name binddn to bind to the LDAP directory.  The user will be prompted for a password for simple authentica-
	      tion.

       -P, --path path
	      The passwd file is located below the specified directory path. chsh will use this files, not /etc/passwd.  This is useful for  exam-
	      ple  on  NIS master servers, where you do not want to give all users in the NIS database automatic access to your NIS server and the
	      NIS map is build from special files.

       -s, --shell
	      Specify your login shell.

       -l, --list-shells
	      Print the list of shells listed in /etc/shells and exit.

       -q, --quite
	      Don't be verbose.

       -u, --usage
	      Print a usage message and exit.

	   --help
	      Print a more verbose help text and exit.

       -v, --version
	      Print version information and exit.

FILES

       /etc/passwd - user account information
       /etc/shells - list of valid login shells

SEE ALSO

       chfn(1), passwd(5), shells(5)

AUTHOR

       Thorsten Kukuk <kukuk@suse.de>

pwdutils							   February 2004							   chsh(1)
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