Have tried the search, but nothing resembles what I'd like to accomplish. I am attempting to write a script that will allow the user to input a list of data at the command prompt, then the data is used by another script for processing. I am allowing the user a list of 10 members in order to... (4 Replies)
Hi,
I have a shell script that has to taken inputs from a file say "Inputs". Now I take 2 inputs at a time. Suppose the Inputs file contains numbers like
2
3
4
5
Now I have a written a script for adding 2 numbers. When I run the script for first time 2 and 3 must be the inputs. When i run the... (4 Replies)
I am trying to extract two fields from the output of ifconfig command on one of my sun server . The output looks like :
root@e08k18:/tmp/test# ifconfig -a
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
inet 127.0.0.1 netmask ff000000
ce0:... (9 Replies)
Hi,
Lets say I have a script "ss" which does this
read abc
echo $abc
read pqr
echo $pqr
Now if I want to pass and argument to only "abc" how do I do it.
If I do
echo "somevalue" | ss, it does not prompt for pqr and its value comes out as blank.
Any help is appreciated
Thanks
P (6 Replies)
Can someone please help me with this SHELL script?
I need to create a script that gets a positive number n as an argument. The script must calculate the factorial of its argument. In other words, it must calculate n!=1x2x3x...xn. Note that 0!=1.
Here is a start but I have no clue how to... (3 Replies)
If ($argv == “-debug”) then
Echo “in loop”
Endif
But this is not working. If I modify this code and remove “-“, then it works.
Similarly I am getting problem using grep command also
Grep “-debug” Filename
Can someone please help me on how to resolve these... (1 Reply)
Hello,
Is there any method thorugh which script can take argument if pass otherwise if argument doesn't pass then it takes the argument from the configuration file
i.e I am workiing on a script which will run through crontab and the script will
chekout the code ,zip and copy to the... (3 Replies)
Hi All,
I am running the script
VBoxManage list vms |sed 's/"//g' | cut -d " " -f1 > har1out.mytxt
result=`cat har1out.mytxt | grep $1'
echo $result
echo $1
{
if
then
echo pass
else
echo fail
fi (2 Replies)
I am trying to make an interactive script. Only problem my inputs are not read and correctly channeled.
Please help:
Here is my code
#!/bin/sh
PATHSCRIPT=/home/pp/tmp
#if ; then
# echo "Syntax : $0 input off lat sample"
# exit 1
# fi
echo "Choice of Graph"
echo "1 -- Type... (5 Replies)
Discussion started by: newkid.7955
5 Replies
LEARN ABOUT NETBSD
xc_wait
XCALL(9) BSD Kernel Developer's Manual XCALL(9)NAME
xcall, xc_broadcast, xc_unicast, xc_wait -- cross-call interface
SYNOPSIS
#include <sys/xcall.h>
typedef void (*xcfunc_t)(void *, void *);
uint64_t
xc_broadcast(u_int flags, xcfunc_t func, void *arg1, void *arg2);
uint64_t
xc_unicast(u_int flags, xcfunc_t func, void *arg1, void *arg2, struct cpu_info *ci);
void
xc_wait(uint64_t where);
DESCRIPTION
The machine-independent xcall interface allows any CPU in the system to request that an arbitrary function be executed on any other CPU.
Sometimes it is necessary to modify hardware state that is tied directly to individual CPUs (such as a CPU's local timer), and these updates
can not be done remotely by another CPU. The LWP requesting the update may be unable to guarantee that it will be running on the CPU where
the update must occur, when the update occurs.
Additionally, it is sometimes necessary to modify per-CPU software state from a remote CPU. Where these update operations are so rare or the
access to the per-CPU data so frequent that the cost of using locking or atomic operations to provide coherency is prohibitive, another way
must be found.
Cross calls help to solve these types of problem. However, since this facility is heavyweight, it is expected that it will not be used
often.
xcall provides a mechanism for making ``low priority'' cross calls. The function to be executed runs on the remote CPU within a thread con-
text, and not from a software interrupt, so it can ensure that it is not interrupting other code running on the CPU, and so has exclusive
access to the CPU. Keep in mind that unless disabled, it may cause a kernel preemption.
xcall also provides a mechanism for making ``high priority'' cross calls. The function to be executed runs on the remote CPU within a
IPL_SOFTCLOCK software interrupt context, possibly interrupting other lower-priority code running on the CPU.
NOTES
Functions being called should be relatively lightweight. They may block on locks, but carefully and minimally, to not interfere with other
cross calls in the system.
FUNCTIONS
xc_broadcast(flags, func, arg1, arg2)
Call (*func)(arg1, arg2) on all CPUs in the system. Return a uint64_t ``ticket'' to xc_wait() on for the cross-call to complete.
flags should be XC_HIGHPRI for a "high priority" call, and 0 for a "low priority" call. xc_broadcast() should not be called from
interrupt context.
xc_unicast(flags, func, arg1, arg2, ci)
Like xc_broadcast(), but call (*func)() on only the CPU indicated by ci. xc_unicast() also returns a ``ticket''.
xc_wait(where)
Wait on the ``ticket'' returned by a prior xc_broadcast() or xc_unicast() for the corresponding cross-call to complete. xc_wait()
should be called from a thread context.
CODE REFERENCES
The xcall interface is implemented within the file sys/kern/subr_xcall.c.
SEE ALSO kpreempt(9), percpu(9)HISTORY
The xcall interface first appeared in NetBSD 5.0.
AUTHORS
Andrew Doran <ad@NetBSD.org>
BSD October 24, 2011 BSD