02-09-2009
Does the file you are using as a kind of semaphore original on the same server as the script you are running, or does it originate on a different server?
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1. Shell Programming and Scripting
Hi,
I want to do the foll steps:
1. Check if someone has a lock on my file1.
2. if file1 is locked by any other user
wait in a loop till another user releases lock
3. when lock released, lock file1.
4. do procesing (write) on file1.
5. processing complete. release lock on file1.
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2. UNIX for Dummies Questions & Answers
Hi,
I want to know my file is 1 hr 30 min old or not,
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3. Shell Programming and Scripting
:cool:
I need to execute a shell script to do the following:
cat a file
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4. Shell Programming and Scripting
Did not use 'wait' yet.
How I understand by now the wait works only for child processes, started background.
Is there any other way to watch completion of any, not related process (at least, a process, owned by the same user?)
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hi all
i have a view in the database with columns
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i also have to schedule this periodically using cron tab.
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6. Shell Programming and Scripting
Hello,
I need to evaluate (under BASH) if the certain file has been updated or not. If the file still wasn't updated, script should wait. The script picks up the time stamp of the file using command OldTimestamp=$(date -r $MyDir/$MyFile), but I don't know how to code a waiting loop with new and... (6 Replies)
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7. Shell Programming and Scripting
Hi,
I am facing a strange issue,
when i call a script from my while loop in background it doesnt go in background, despite the wait i put below the whil loop it goes forward even before the process put in background is completed.
cat abc.txt | while read -u4 line
do
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Hi All, i have a requirement
I created a file list as below :
more abc_file_list.txt
Rem_DD.csv
Rem_Non.csv
Rem_Ld.csv
CC_Ld_Non_IRA.csv ...
Above are the 4 files (For now ,we dont know how many in the file) which need to be present else need to get an email for missing files.
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LEARN ABOUT CENTOS
scsi_start
SCSI_START(8) SG3_UTILS SCSI_START(8)
NAME
scsi_start - start one or more SCSI disks
SYNOPSIS
scsi_start [--help] [--verbose] [--wait] DEVICE [DEVICE]*
DESCRIPTION
This bash shell script calls the sg_start utility on each given DEVICE. The purpose is to spin up (start) each given DEVICE.
OPTIONS
Arguments to long options are mandatory for short options as well.
-h, --help
print out the usage message then exit.
-v, --verbose
increase level or verbosity.
-w, --wait
wait for the spin up (start) on each given DEVICE to complete. The default action is to do each start in immediate mode.
NOTES
If a large number of disks are spun up at the same time (i.e. without the --wait option) then the power supply may be overloaded.
EXIT STATUS
The exit status of this script is 0 when it is successful. Otherwise the exit status is that of the last sg_start utility called. See the
sg3_utils(8) man page.
AUTHORS
Written by D. Gilbert
COPYRIGHT
Copyright (C) 2009-2013 Douglas Gilbert
This software is distributed under a FreeBSD license. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
POSE.
SEE ALSO
sg_start (sg3_utils)
sg3_utils-1.36 May 2013 SCSI_START(8)