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Top Forums Shell Programming and Scripting Redirect the output in a file and on screen Post 302524425 by dynamax on Monday 23rd of May 2011 09:42:40 AM
Old 05-23-2011
Redirect the output in a file and on screen

I am trying to get following result from the scipt I have. First time it generates the o/p in correct format. However if I run it again it appends to the existing file. I would like to see o/p on screen as well as save it in file. Everytime it should create new file.

## I/P file
0174
0175
0176
0177

## O/P file as well as on screen

create grp 0174, class=first;
new mem 14F4 to grp 0174;
new mem 14F5 to grp 0174;
new mem 14F6 to grp 0174;
new mem 14F7 to grp 0174;
new mem 14F8 to grp 0174;

Code:
 
     $grphd = `head -1 < $formember`;
     chomp ($grphd);
     $class="first";
     $memout = "/tmp/$class\_grp\_$grphd";
     $totcnt = `wc -l < $listmem`;
     $memcnt1 = 1;
     open (STDOUT, "| tee -ai $memout");
     open (FORMOUT,  $listmem) || die "Form Meta - Can't open $memdevlst: $!\n";
 while ($MEM= <FORMOUT>)
        {
if (($totcnt > 1) && ($metmcnt1 =~ 1))
        {
        chomp $MEM;
        print "create grp  $MEM, class=$class; \n";
        $memcnt1++;
        }
else
        {
        chomp $MEM;
        print "add dev $MEM to meta $grphd;\n";
        $memcnt1++;
        }
}
}
close (FORMOUT);
close (STDOUT);

 

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MEM(4)							     Linux Programmer's Manual							    MEM(4)

NAME
mem, kmem, port - system memory, kernel memory and system ports DESCRIPTION
mem is a character device file that is an image of the main memory of the computer. It may be used, for example, to examine (and even patch) the system. Byte addresses in mem are interpreted as physical memory addresses. References to nonexistent locations cause errors to be returned. Examining and patching is likely to lead to unexpected results when read-only or write-only bits are present. It is typically created by: mknod -m 660 /dev/mem c 1 1 chown root:kmem /dev/mem The file kmem is the same as mem, except that the kernel virtual memory rather than physical memory is accessed. It is typically created by: mknod -m 640 /dev/kmem c 1 2 chown root:kmem /dev/kmem port is similar to mem, but the I/O ports are accessed. It is typically created by: mknod -m 660 /dev/port c 1 4 chown root:mem /dev/port FILES
/dev/mem /dev/kmem /dev/port SEE ALSO
chown(1), mknod(1), ioperm(2) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 1992-11-21 MEM(4)
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