08-21-2009
cfajohnson solution has shown that the parentheses in Frankin52's solution only clarified the command line.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi Guys,
I want to use if conition for my script. Before I used it tried it with some small test scripts. But it was not succeeded. My script and screen output as follows,
Script:
echo 'Do you think Yes or No (y/n) : '
read ans
echo You input anser as $ans
ans1=y
if ( $ans == $ans1... (5 Replies)
Discussion started by: maheshsri
5 Replies
2. Shell Programming and Scripting
hi, :)
pls consider the following if statement
if //g') ]
then
........
else
.......
when i execute the script i am getting the following error
'(' unexpected
I am not able to find the mistake.
could anybody tell where i did mistake.
cheers
RRK (13 Replies)
Discussion started by: ravi raj kumar
13 Replies
3. Shell Programming and Scripting
hi,
actully i need the belp for the below.
host_list=" Host1 host2 host3 host4 "
n=`hostname`
i need to put the condition like the below
if n is among the host mention in the host_list if
then
#some stugg
else
# some other stuff
fi (1 Reply)
Discussion started by: mail2sant
1 Replies
4. Shell Programming and Scripting
Hi ,
I am trying the following simple script . But it is always giving 1 output. Dont know why
#!/bin/sh
find . -name "a.log"
if ; then
echo "1"
else
echo "0"
fi
Kindly advice. it is giving 1 output even when the a.log file is not there (26 Replies)
Discussion started by: himvat
26 Replies
5. Shell Programming and Scripting
Hi all,
I have task to delete two different files from all file system. one is core file & other is old file.
i can delete core file but for old file i have to mv in different location.
i wrote a script but it is not working.
i have a two variables in this script first one is delcnt &... (6 Replies)
Discussion started by: dravi_laxmi
6 Replies
6. Shell Programming and Scripting
Hi,
I need to use if condition for search a file pattern on a particular location.
cd $file_Path
if ||
then
do this
else
do that
fi
Can someone help me with the if part, how i can put those conditions?
make sure format should be *.file* and *.file
file is a keyword which i... (5 Replies)
Discussion started by: amit.mathur08
5 Replies
7. Shell Programming and Scripting
Hi i am writing a script where i am running , 5 scripts together in 1 script .
Now what i want is when these 5 scripts run completely , i should execute some other commands like i have compile the data etc.
I have have 5 echo statements at the end of all those scripts .
Like echo "1 is done" in... (1 Reply)
Discussion started by: honey26
1 Replies
8. Shell Programming and Scripting
Hi All,
I am using below if condition to check whether null is passed as a parameter to the program
if or ;
then
echo "ABC">>$FILE
else
echo "CDF">>$FILE
fi
However it is saying me null=null command not found . Please help me with this (9 Replies)
Discussion started by: Hypesslearner
9 Replies
9. Shell Programming and Scripting
Hi All,
Seeking for your assistance on how to condition it correctly.
cat file1.txt
290,1663,43,888,0,0.00,86.91,0.00,26.98,0.00
290,1663,52,0,0,0.00,0.00,0.00,0.00,0.00
290,1663,52,888,0,0.00,34.60,0.00,9.00,0.00
1st scenario:
if the fourth column contains 888s and 0s it is by... (16 Replies)
Discussion started by: znesotomayor
16 Replies
LEARN ABOUT HPUX
pthread_cond_broadcast
pthread_cond_signal(3T) pthread_cond_signal(3T)
NAME
pthread_cond_signal(), pthread_cond_broadcast() - unblock one or all threads waiting on a condition variable
SYNOPSIS
PARAMETERS
cond Pointer to the condition variable to be signaled or broadcast.
DESCRIPTION
The function is used to wake-up one of the threads that are waiting for the occurrence of a condition associated with condition variable
cond. If there are no threads blocked on cond, this function has no effect. If more than one thread is blocked on cond, the scheduling
policy determines which thread is unblocked. It is possible that more than one thread can be unblocked due to a spurious wakeup.
The function is used to wake-up all threads that are waiting for the occurrence of a condition associated with the condition variable cond.
If there are no threads blocked on cond, this function has no effect. If more than one thread is blocked on cond, the scheduling policy
determines the order in which threads are unblocked.
The condition variabled denoted by cond must have been dynamically initialized by a call to or statically initialized with the macro
An unblocked thread will reacquire the mutex it held when it started the condition wait before returning from or The threads that are
unblocked contend for the mutex according to their scheduling policy and priority.
The or functions can be called by a thread whether or not it currently owns the condition variable's associated mutex. For predictable
scheduling behavior and to prevent lost wake-ups, the mutex should be held when signaling a condition variable.
Usage
When using condition variables, there is a boolean predicate associated with each condition wait. If this predicate is false, the thread
should do a condition wait. Spurious wakeups may occur when waiting on a condition variable. Because the return values from and do not
imply anything about the value of this predicate, the predicate should always be re-evaluated.
Applications using condition variables typically acquire a mutex and enter a loop which checks the predicate. Depending on the value of
the predicate, the thread either breaks out of the loop or waits on the condition. On return from the condition wait, the predicate is re-
evaluated.
RETURN VALUE
Upon successful completion, and return zero. Otherwise, an error number is returned to indicate the error (the variable is not set).
ERRORS
For each of the following conditions, if the condition is detected, the and functions return the corresponding error number:
[EINVAL] cond is not a valid condition variable.
[EFAULT] cond parameter points to an illegal address.
AUTHOR
and were derived from the IEEE POSIX P1003.1c standard.
SEE ALSO
pthread_cond_init(3T), pthread_cond_wait(3T).
STANDARDS CONFORMANCE
Pthread Library pthread_cond_signal(3T)