05-10-2013
dont use [[ use [ and to group your condition properly put them inside ( )
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1. Shell Programming and Scripting
Hi friends, :)
In a shell script i found the following if condition.
echo -n "Which version of $1 do you want to restore ('0' to quit)? : "
read desired
if ${desired:=1} -ge $index ] ; then
echo "$0: Restore canceled by user: index value too big." >&2
exit 1
fi
Can... (1 Reply)
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2. Shell Programming and Scripting
Hi,
I am trying to execute this command, but is it not working, says "`;' unexpected"
eval $lgrep $SAM_CMD ; if ; then ; echo "No Error" ; fi
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3. Shell Programming and Scripting
After my if condtion give rusult true then script should stop execution.
Please advice...Thnaks in advance (1 Reply)
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4. HP-UX
Executed the following if conditions .. and got different results .
only (( )) gave correct o/p with all scenarios .
Can anybody please let me know what is the difference between and ] and ((condition)) when used with if condition.
And why each condition gave different result.
1.... (2 Replies)
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5. Shell Programming and Scripting
hi,
I have some problems in my simple script about the redirect echo stdout command inside a condition. Why is the echo command inside the elif still execute in the else command
Here are my simple script
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6. UNIX for Dummies Questions & Answers
OS Environment: HP-UX B.11.31 U ia64
I am using the shell script code to connect to Oracle RAC database.
Passing the parameter of cluster database name.
typeset -l DB_ID=$1
+ typeset -l DB_ID=sivDB
#---- 3. SetDB validation -------------
if ; then
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7. Shell Programming and Scripting
hi
my problem is little complicated one. i have 2 files which appear like this
file 1
abbsss:aa:22:34:as akl abc 1234
mkilll:as:ss:23:qs asc abc 0987
mlopii:cd:wq:24:as asd abc 7866
file2
lkoaa:as:24:32:sa alk abc 3245
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kloia:ds:45:56:sa acq abc 7805
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HI
cd ${back_home}
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9. Shell Programming and Scripting
HI All,
I'm embedding SQL query in Script which gives following output:
Assignee Group Total
ABC Group1 17
PQR Group2 5
PQR Group3 6
XYZ Group1 10
XYZ Group3 5
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How do i sum up the contents of this output so as to get following output:
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10. Shell Programming and Scripting
I have a sample server name listed in variable as below:
var="server-13"
I need to check if the 7th character on $var is number 1
whichenv=`echo "$var"| head -c 7 | tail -c 1`
if ]; then
echo "9 found"
else
echo "9 Not Found"
fi
Output:
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LEARN ABOUT CENTOS
wait_event_interruptible_exclusive_locked_irq
WAIT_EVENT_INTERRUPT(9) Driver Basics WAIT_EVENT_INTERRUPT(9)
NAME
wait_event_interruptible_exclusive_locked_irq - sleep until a condition gets true
SYNOPSIS
wait_event_interruptible_exclusive_locked_irq(wq, condition);
ARGUMENTS
wq
the waitqueue to wait on
condition
a C expression for the event to wait for
DESCRIPTION
The process is put to sleep (TASK_INTERRUPTIBLE) until the condition evaluates to true or a signal is received. The condition is checked
each time the waitqueue wq is woken up.
It must be called with wq.lock being held. This spinlock is unlocked while sleeping but condition testing is done while lock is held and
when this macro exits the lock is held.
The lock is locked/unlocked using spin_lock_irq/spin_unlock_irq functions which must match the way they are locked/unlocked outside of this
macro.
The process is put on the wait queue with an WQ_FLAG_EXCLUSIVE flag set thus when other process waits process on the list if this process
is awaken further processes are not considered.
wake_up_locked has to be called after changing any variable that could change the result of the wait condition.
The function will return -ERESTARTSYS if it was interrupted by a signal and 0 if condition evaluated to true.
COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 WAIT_EVENT_INTERRUPT(9)