Restartibility Functionality.... Post: 302072154

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Top Forums Shell Programming and Scripting Restartibility Functionality.... Post 302072154 by thestevew on Friday 28th of April 2006 06:17:48 AM

04-28-2006

Registered User

I recently wrote a script to install software releases that needed to be restartable. There are lots of steps, so I didn't want to have to repeat code (even though most is in separate functions) so it uses a pointer to the current step and compares this with an optional restart point provided as a run-time parameter. The bare bones are:

Code:

Code

# Set up defaults
restartpoint=0
step=0

# parse run time parameters
while getopts :d:l:r:s:uh OPTION ...
do
  case $OPTION in
...
  s) restartpoint=$OPTARG;;
...
     exit 0;
  esac
done

while :
do
  if [ $restartpoint -le $step ]; then
    case $step in
    0) {
	Code for step zero
       };;
    1) {
	Code for step 1
       };;
... code for rest of steps here ...
    *) break;;
    esac
  else
    print "Step $step skipped"
  fi
  step=$(($step + 1))
done
... cleanup code here

I wanted to control restarts automatically, but you could automate the restart by writing the last successfully completed step to a file and read this at the start of the script to work out the restart point.

Does this help?

thestevew

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sasl_server_step

sasl_server_step(3)						  SASL man pages					       sasl_server_step(3)

NAME

       sasl_server_step - Perform a step in the authentication negotiation

SYNOPSIS

       #include <sasl/sasl.h>

       int sasl_server_step(sasl_conn_t *conn,
			   const char *clientin,
			   unsigned clientinlen,
			const char ** serverout,
			   unsigned * serveroutlen);

DESCRIPTION

       sasl_server_step()  performs  a	step  in  the  authentication  negotiation.  It returns SASL_OK if the whole negotiation is successful and
       SASL_CONTINUE if this step is ok but at least one more step is needed.

       conn is the SASL connection context

       clientin is the data given by the client (decoded if the protocol encodes requests sent over the wire) clientinlen is the  length  of  cli-
       entin

       serverout and serveroutlen are set by the library and should be sent to the client.

RETURN VALUE

       sasl_server_step  returns  an  integer which corresponds to one of the SASL error codes. SASL_CONTINUE indicates success and that there are
       more steps needed in the authentication. SASL_OK indicates that the authentication is complete. All other return codes indicate errors  and
       should either be handled or the authentication session should be quit.

CONFORMING TO

       RFC 4422

SEE ALSO

       sasl(3), sasl_errors(3), sasl_server_init(3), sasl_server_new(3), sasl_server_start(3)

SASL
								   10 July 2001 					       sasl_server_step(3)

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