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Full Discussion: Variables and functions
Top Forums Shell Programming and Scripting Variables and functions Post 302118348 by aigles on Monday 21st of May 2007 01:10:42 PM
Old 05-21-2007
Variables define in main part of your script are accessible inside functions (in read/write mode).
You can also define variables locales to you function.

See the following example :
Code:
my_function ()
{
   echo "my_function: begin"
   local work_var="work_var from my_function"
   echo "  main_var=$main_var"
   echo "  work_var=$work_var"
   main_var="new value from my_function"
   echo "my_function: end"
}
work_var="work main value"
main_var="value from main"

echo "main: Before my_function call"
echo "  work_var=$work_var"
echo "  main_var=$main_var"

my_function

echo "main: After my_function call"
echo "  work_var=$work_var"
echo "  main_var=$main_var"

Output:
Code:
main: Before my_function call
  work_var=work main value
  main_var=value from main
my_function: begin
  main_var=value from main
  work_var=work_var from my_function
my_function: end
main: After my_function call
  work_var=work main value
  main_var=new value from my_function

Jean-Pierre.
 

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LEARN ABOUT REDHAT

ftpconfig

ftpconfig(1M)						  System Administration Commands					     ftpconfig(1M)

NAME

       ftpconfig - set up anonymous FTP

SYNOPSIS

       ftpconfig [ftpdir]

       ftpconfig -d ftpdir

DESCRIPTION

       The ftpconfig script is executed by the super user to set up anonymous FTP. Anonymous FTP allows users to remotely log on to the FTP server
       by specifying the user name  ftp or anonymous and the user's email  address as password. The anonymous users  are  logged  on  to  the  FTP
       Server  and  given  access to a restricted file area with its own file system root. See chroot(2). The FTP area has  its own minimal system
       files.

       This command will copy and set up all the components needed to operate an anonymous FTP server, including creating the  ftp  user  account,
       creating  device  nodes,  copying  /usr/lib files, and copying timezone data.  The passwd and group files set up have been stripped down to
       prevent malicious users from finding login names on the server.	The anonymous file area will be placed	under  ftpdir.	If  the  ftp  user
       account already exists, then the current FTP area is used, and the system files in it are updated. All other files are left untouched. This
       command should be run to update the anonymous FTP area's configuration whenever a system patch is installed, or the system is upgraded.

OPTIONS

       -d	Create a new or update an existing ftpdir without creating or updating the ftp user account. Use this option when  creating  guest
		FTP user accounts.

OPERANDS

       The following operands are supported:

       ftpdir	The absolute pathname of the directory under which the anonymous FTP area is set up.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion

       1	Improper usage of the command

       2	Command failed

ATTRIBUTES

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

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

SEE ALSO

       ftpaddhost(1M), in.ftpd(1M), useradd(1M), chroot(2), attributes(5)

SunOS 5.10							    1 May 2003							     ftpconfig(1M)
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