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Trying to read data multiple times

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Old 12-06-2006
Trying to read data multiple times
I am developing a script to automate Global Mirroring on IBM DS8100's. Part of the process is to establish a global copy and wait until the paired LUN's Out of Sync tracks goes to zero. I can issue a command to display the ouput and am trying to use AWK to read the appropriate field. I am simulating the command output (since I can't do it live) by capturing the output to a file and then reading the file. My problem is I haven't figured out how to use getline to read the file multiple times. Here is what I'm attempting:

while ( EndofRout > 0 ) {
NR = 1
while ( (getline < "/tmp/output.orig") > 0 ) {
OutSyncTrack[NR] = $7
NR++
} # end of while getline to build OutSyncTrack array
#
#
for ( x = 1; x <= NR; ++x ) {
EndofRout = 0
print "EndofRout is " EndofRout
if ( OutSyncTrack[x] != 0 )
EndofRout = 1
continue
}
}

The field $7 starts off as a high number then gradually goes to zero. I can simulate this by editing the file, but my problem is that it is only reading the file once even though $7 is not zero. Any help will be greatly appreciated. Thanks in advance.
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LEARN ABOUT BSD

fork

FORK(2) 							System Calls Manual							   FORK(2)

NAME

       fork - create a new process

SYNOPSIS

       pid = fork()
       int pid;

DESCRIPTION

       Fork causes creation of a new process.  The new process (child process) is an exact copy of the calling process except for the following:

	    The child process has a unique process ID.

	    The child process has a different parent process ID (i.e., the process ID of the parent process).

	    The child process has its own copy of the parent's descriptors.  These descriptors reference the same underlying objects, so that, for
	    instance, file pointers in file objects are shared between the child and the parent, so that an lseek(2) on a descriptor in the  child
	    process  can affect a subsequent read or write by the parent.  This descriptor copying is also used by the shell to establish standard
	    input and output for newly created processes as well as to set up pipes.

	    The child processes resource utilizations are set to 0; see setrlimit(2).

RETURN VALUE

       Upon successful completion, fork returns a value of 0 to the child process and returns the process ID of the child process  to  the  parent
       process.   Otherwise, a value of -1 is returned to the parent process, no child process is created, and the global variable errno is set to
       indicate the error.

ERRORS

       Fork will fail and no child process will be created if one or more of the following are true:

       [EAGAIN]       The system-imposed limit on the total number of processes under execution would be exceeded.  This limit	is  configuration-
		      dependent.

       [EAGAIN]       The  system-imposed limit MAXUPRC (<sys/param.h>) on the total number of processes under execution by a single user would be
		      exceeded.

       [ENOMEM]       There is insufficient swap space for the new process.

SEE ALSO

       execve(2), wait(2)

3rd Berkeley Distribution					   May 22, 1986 							   FORK(2)