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Top Forums Shell Programming and Scripting Check for a file and touch if not exist Post 302770232 by sandeep karna on Friday 15th of February 2013 12:30:20 AM
Old 02-15-2013
Check for a file and touch if not exist

Hi,

I've a situation where i need to check for the file existence and create a zero byte file based on the parameter,in some cases i need to touch and in some case i dont need to touch with zero byte file please help me on parameterizing this touch command??

Regards.
San
 

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touch(1B)					     SunOS/BSD Compatibility Package Commands						 touch(1B)

NAME
touch - change file access and modification times SYNOPSIS
/usr/ucb/touch [-acfm] file... DESCRIPTION
touch sets the access and modification times of each file to the current time. file is created if it does not already exist. OPTIONS
-a Change the access time of file. Do not change the modification time unless -m is also specified. -c Do not create file if it does not exist. -f Attempt to force the touch in spite of read and write permissions on file. -m Change the modification time of file. Do not change the access time unless -a is also specified. USAGE
See largefile(5) for the description of the behavior of touch when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes). EXIT STATUS
The following exit values are returned: 0 touch executed successfully and all requested changes were made. >0 An error occurred. touch returns the number of files for which the times could not be successfully modified. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
touch(1), attributes(5), largefile(5) SunOS 5.10 26 Oct 1995 touch(1B)
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