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Full Discussion: Scripting needed for newbie
Top Forums Shell Programming and Scripting Scripting needed for newbie Post 302369178 by frans on Friday 6th of November 2009 06:07:41 PM
Old 11-06-2009
Here code that doesn't use at but sleep; it doesn't need external storage of data but runs continuously.
Wat i suggest is to log evrything in the beginning by echoing the variables to the logfile, mainly the Delay to see if you have to adjust the tolerance at another value.
I let you code the different logs you want to make (i can help u) but try first the functioning of the script. You can add lines for monitoring purpose by echoing commands or start the script with the -x parameter like bash -x simple.sh
Code:
#!/bin/bash
File1=simple.txt    # The file to check
LogFile=simple.log # The log file
DelayMax=30 # Timeout delay
Tolerance=2 
# BEGIN ##############################
while true
do
    StampNow=$(date +%s)/60    # stamp in minutes
    StampFile=$(date -r "$File1" +%s)/60
    let Delay=$StampNow-$StampFile
    if [ $Delay -gt $DelayMax ]
    then
        echo "$(date) : ERROR : Timeout" >> $LogFile
        # etc.
        exit 1
    elif [ $StampFile -eq $StampOld ]
    then
        sleep $Tolerance minutes # Retry a bit later
    else
        StampOld=$StampFile
        let NewDelay=$StampNow-$StampFile+15+$Tolerance # To synchronize with the updating
        sleep $NewDelay minutes
    fi
done

nothing more before 7:00 or 8:00 GMT Smilie
Code:
frans@localhost-$ sleep 8 hours


Last edited by frans; 11-06-2009 at 07:15 PM.. Reason: it's late
 

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TIMES(P)						     POSIX Programmer's Manual							  TIMES(P)

NAME
times - write process times SYNOPSIS
times DESCRIPTION
The times utility shall write the accumulated user and system times for the shell and for all of its child processes, in the following POSIX locale format: "%dm%fs %dm%fs %dm%fs %dm%fs ", <shell user minutes>, <shell user seconds>, <shell system minutes>, <shell system seconds>, <children user minutes>, <children user seconds>, <children system minutes>, <children system seconds> The four pairs of times shall correspond to the members of the <sys/times.h> tms structure (defined in the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 13, Headers) as returned by times(): tms_utime, tms_stime, tms_cutime, and tms_cstime, respectively. OPTIONS
None. OPERANDS
None. STDIN
Not used. INPUT FILES
None. ENVIRONMENT VARIABLES
None. ASYNCHRONOUS EVENTS
Default. STDOUT
See the DESCRIPTION. STDERR
The standard error shall be used only for diagnostic messages. OUTPUT FILES
None. EXTENDED DESCRIPTION
None. EXIT STATUS
Zero. CONSEQUENCES OF ERRORS
Default. The following sections are informative. APPLICATION USAGE
None. EXAMPLES
$ times 0m0.43s 0m1.11s 8m44.18s 1m43.23s RATIONALE
The times special built-in from the Single UNIX Specification is now required for all conforming shells. FUTURE DIRECTIONS
None. SEE ALSO
Special Built-In Utilities COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 TIMES(P)
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