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Top Forums Shell Programming and Scripting Read a number from file and place it back Post 302323798 by dcoolsam on Tuesday 9th of June 2009 03:35:34 AM
Old 06-09-2009
MySQL

Vinay,
Try this code:

read i < a
i=`expr $i + 1`
echo $i > a
cat a

It is working perfectly fine in bash.

Here "a" is a file name where the number is stored & "i" is a temp variable.

Let me know if you need any more info.
 

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gnomevfs-cat(1) 						   User Commands						   gnomevfs-cat(1)

NAME
gnomevfs-cat - print a file to standard output using the VFS system SYNOPSIS
gnomevfs-cat URI DESCRIPTION
gnomevfs-cat prints a file to standard output using the virtual file system to access the file via a URI. OPERANDS
The following operands are supported: URI Specifies the file location in standard URI format. EXAMPLES
Example 1: Cat a File From a Web Server example% gnomevfs-cat http://www.sun.com Example 2: Cat a Local File example% gnomevfs-cat file:///home/user/README.txt ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables: NLSPATH. EXIT STATUS
The exit value 0 is returned regardless of success or failure. FILES
The following files are used by this application: /usr/bin/gnomevfs-cat Executable to print a file to standard output using the VFS system ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWgnome-vfs | +-----------------------------+-----------------------------+ |Interface stability |External | +-----------------------------+-----------------------------+ SEE ALSO
gnomevfs-copy(1), gnomevfs-info(1), gnomevfs-ls(1), gnomevfs-mkdir(1) NOTES
Written by Stephen Browne, Sun Microsystems Inc., 2004. SunOS 5.10 6 Sep 2004 gnomevfs-cat(1)
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