hi,
i want to increment a Variable but it doesnt work.
here my codé
COUNT=1
COUNT= 'expr $COUNT + 1'
i've tried it in the prompt but it print me:
expr: syntaxerror
What does I make wrong? (4 Replies)
Hi All,
I have created a script...
#!/bin/sh
datafile=ABC2008101601.OUT
indfile=ABCIND20081016.1.OUT
waittime=600
starttime=0
while
do
if
then
echo "Indicator file has arrived."
break
else
sleep 10;
((starttime=$starttime+10))
echo $starttime (2 Replies)
Hello
Does anyone know how to auto-increment the value of a variable, preferably using awk or sed?
I need to read values from a file and auto-increment those values to use them as line numbers
I'd be doing:
while read line do
# auto-increment
sed -n${line}p file> file1
done... (6 Replies)
Hi All,
I have a variable n that stores a number.
Eg. echo $n comes out to be 120.
I need to print 121 using echo command on n.
Please advice.
Thanks in advance !! (4 Replies)
Hi,
I have a variable lets say DATA_DATE.
I have to pass some value to this variable in YYYYMMDD format.
lets say today I have passed this variable as :
DATA_DATE=20100107
Then pls help me how to calculate another variable DATA_DATE1 (which is DATA_DATE+1).
The code should work... (3 Replies)
hi Friends,
Today_Dt=`date "+%Y-%m-%d"`
So the Today date is 2010-05-03
I have a file which has date values as below
2010-04-27
2010-04-02
2010-04-18
2010-04-28
2010-04-29
.. (1 Reply)
Hi,
I have a small query with gawk which i'm unsure how to solve. My csv input data is as follows:
1 58352.9 34549 -469.323 LINE_149
2 58352.9 34499 -469.323 LINE_149
3 58352.9 34549 -469.323 LINE_151
4 58352.9 34503.4 -489.841 LINE_151
5 58352.9 34549 -469.323 LINE_152
6 58352.9... (1 Reply)
I have to increment time ... by sec but i am getting the output like this.
for m in {2..3}
> do
> for (( i = 1; i <= 13; i++ ))
> do
> echo "$m:$i"
> done
> done
2:1
2:2
2:3
2:4
2:5
2:6
2:7
2:8 (2 Replies)
I want a script which increments the count when the script runs. Basically I want to send an password reset email notification for an application, the password value should be keep on changing whenever the script is executed for example, first time i execute it should be password1, second time... (2 Replies)
Discussion started by: JAGADESH GN
2 Replies
LEARN ABOUT SUNOS
_lwp_sema_wait
_lwp_sema_wait(2) System Calls _lwp_sema_wait(2)NAME
_lwp_sema_wait, _lwp_sema_trywait, _lwp_sema_init, _lwp_sema_post - semaphore operations
SYNOPSIS
#include <sys/lwp.h>
int _lwp_sema_wait(lwp_sema_t *sema);
int _lwp_sema_trywait(lwp_sema_t *sema);
int _lwp_sema_init(lwp_sema_t *sema, int count);
int _lwp_sema_post(lwp_sema_t *sema);
DESCRIPTION
Conceptually, a semaphore is an non-negative integer count that is atomically incremented and decremented. Typically this represents the
number of resources available. The _lwp_sema_init() function initializes the count, _lwp_sema_post() atomically increments the count, and
_lwp_sema_wait() waits for the count to become greater than 0 and then atomically decrements it.
LWP semaphores must be initialized before use. The _lwp_sema_init() function initializes the count associated with the LWP semaphore
pointed to by sema to count.
The _lwp_sema_wait() function blocks the calling LWP until the semaphore count becomes greater than 0 and then atomically decrements it.
The _lwp_sema_trywait() function atomically decrements the count if it is greater than zero. Otherwise it returns an error.
The _lwp_sema_post() function atomically increments the semaphore count. If there are any LWPs blocked on the semaphore, one is unblocked.
RETURN VALUES
Upon successful completion, 0 is returned. A non-zero value indicates an error.
ERRORS
The _lwp_sema_init(), _lwp_sema_trywait(), _lwp_sema_wait(), and _lwp_sema_post() functions will fail if:
EINVAL The sema argument points to an invalid semaphore.
EFAULT The sema argument points to an illegal address.
The _lwp_sema_wait() function will fail if:
EINTR The function execution was interrupted by a signal or fork(2).
The _lwp_sema_trywait() function will fail if:
EBUSY The function was called on a semaphore with a zero count.
The _lwp_sema_post() function will fail if:
EOVERFLOW The value of the sema argument exceeds SEM_VALUE_MAX.
SEE ALSO fork(2)SunOS 5.10 8 May 1998 _lwp_sema_wait(2)