increment a Variable Post: 77800

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Increment variable stored in a file

Hi, I want to write a perl script, which will increment number stored in file. I want to do this without any file handles. I think we have to use some UNIX commands. I am not sure how to do this with file handles. Thanks,

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Increment of a variable

Hi All, I have a variable n that stores a number. Eg. echo $n comes out to be 120. I need to print 121 using echo command on n. Please advice. Thanks in advance !!

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Increment a date variable in perl script

Hi, I have a perl script which prints epoch value of date in milliseconds as the output. My reuirement is that once the output is printed,the day variable shld increment by 1 and when i execute the script for the second time the output shld be for the new day value. My script looks as...

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Increment a variable in unix bash

Hello There, I have been trying to increment the value of variable to 1, 2, 3 etc. but, it displays 1 1+1 1+1+1 ..... :wall: Could anyone help out with this? for i in *.* do s=`expr $s+1` echo $s j=$i$j mv $i $j done Any help is appreciated?

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Variable increment (of some sort)

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Hi All, I am new to this forum and a novice at shell script. I am trying to write a script to determine each of the NIC configured on a linux system and its speed and Duplex. I came up with the following piece of code: echo `ifconfig -a | grep eth > /home/a/nic.txt` i=`awk -F, '{print...

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[Solved] How to increment and add variable length numbers to a variable in a loop?

Hi All, I have a file which has hundred of records with fixed number of fields. In each record there is set of 8 characters which represent the duration of that activity. I want to sum up the duration present in all the records for a report. The problem is the duration changes per record so I...

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Increment date variable

hey guys, I need to incerement the date variable for instance echo `date '+%F %H:%M:00'` this produces 2014-08-02 20:05:00 -I will grant this to : $Datehour and need to assign 1 hr from now to $Datelasthour -the script time will be used to talk to DB system information. however...

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funlockfile

flockfile(3S)															     flockfile(3S)

NAME

       flockfile(), ftrylockfile(), funlockfile() - explicit locking of streams within a multithread application

SYNOPSIS

DESCRIPTION

       The  and  functions  provide  for  explicit  application-level  locking of streams.  These functions can be used by a thread to delineate a
       sequence of I/O statements that are to be executed as a unit.

       The function is used by a thread to acquire ownership of a object.

       The function is used by a thread to acquire ownership of a object if the object is available; is a non-blocking version of

       The function is used to relinquish the ownership granted to the thread.	The behavior is undefined if a thread other than the current owner
       calls the function.

       Logically,  there  is  a  count associated with each stream.  This count is implicitly initialized to zero when the stream is created.  The
       stream is unlocked when the count is zero.  When the count is positive, a single thread owns the stream.  When the function is  called,	if
       the  count  is zero or if the count is positive and the caller owns the stream, the count is incremented.  Otherwise, the calling thread is
       suspended, waiting for the count to return to zero.  Each call to decrements the count.	This allows matching calls to (or successful calls
       to and to be nested.

       All POSIX.1 and C standard functions that reference objects behave as if they use and internally to obtain ownership of these objects.

RETURN VALUE

       None for and The function returns zero for success and nonzero to indicate that the lock cannot be acquired.

																     flockfile(3S)