I'm trying to read the variable "pause" from a for loop without luck. The function is dependant on the outcome of the test within the loop. If i run this, pause is always 0 within the function. Any ideas?
Thanks.
Correct it
while [ "$pause" -eq 1 ]; do
--edit---
I didn't understand what's your aim ? where you are breaking loop ?
Last edited by Akshay Hegde; 01-20-2014 at 06:13 AM..
Hi,
I use AIX (ksh) and Linux (bash) servers. I'm trying to do scripts to will run in both ksh and bash, and most of the time it works. But this time I don't get it in bash (I'm more familar in ksh).
The goal of my script if to read a "config file" (like "ini" file), and make various report.... (2 Replies)
Hi All,
Im new to shell scripting. I am running EgA.sh and setting one global variable XYZ=0 . Also calling another EgB.sh from EgA.sh, changing the value of XYZ=10
but after executing EgB.sh, value of XYZ is still 0. Im expecting it to be 10.
Anyone for help. Thanks in Advance. :) (5 Replies)
Hi,
I have a loop running until a variable L that is read previously in the full script. I'd like to grep some information in an input file at a line that contains the value of the loop parameter $i.
I've tried to use grep, but the problem is nothing is written in the FILE files. It seems grep... (5 Replies)
Hi all! I think someone might be able to solve my problem pretty easily.
I am trying to run a bash loop with 3 variables. I know how to do:
for var1 in `cat list1`; do for var2 in `cat list2`; do for var3 in `cat list3`; command var1 var2 > var3; done; done; done
However, this will run all... (4 Replies)
Dear mentors, I just need little explanation regarding for loop to give input to awk script
for file in `ls *.txt |sort -t"_" -k2n,2`; do
awk script $file
done
which sorts file in order, and will input one after another file in order to awk script
suppose if I have to input 2 or... (4 Replies)
I am fairly new to bash and am not sure how to resolve this:
I have a series of geographical long/lat points eg. 50/-30 listed on separate lines in a file called junk2. I have input these into an array and am then using that array in a for loop. Towards the end of the loop I create a file called... (4 Replies)
Below is my code:
count=0
if
...
...
else
...
find * -prune -type d | sort -r -n | while read d; do
count=1
if ; then
echo "Count1:$count"
...
...
break 2;
fi
...
done
...
fi
echo "Count2:$count" (9 Replies)
In the below for loop, I extract a variable $d which is an id that will change each time. The bash executes the problem that I am having is that p (after the done) is the path with the extracted $d. However, I can not use it in subsequent loops as it is not reconized. I have been trying to change... (3 Replies)
In the else of the main if condition .
else
set lnk = $(readlink -f <path> | cut -d '/' -f7)
echo "$lnk"
if ]
When I run the above on command line , the execution seems to be fine and I get the desired output. But when I try to assign it to a variable within a loop... (12 Replies)
Cope sample1: test.sh
i=0
echo " Outside loop i = $i "
while
do
i=$(( $i + 1))
echo "Inside loop i = $i "
done
echo " Out of loop i is : $i "
When run output :
Outside loop i = 0
Inside loop i = 1
Inside loop i = 2
Inside loop i = 3
Inside loop i = 4
Inside loop i = 5
Inside... (8 Replies)
Discussion started by: Adarshreddy01
8 Replies
LEARN ABOUT REDHAT
nanosleep
NANOSLEEP(2) Linux Programmer's Manual NANOSLEEP(2)NAME
nanosleep - pause execution for a specified time
SYNOPSIS
#include <time.h>
int nanosleep(const struct timespec *req, struct timespec *rem);
DESCRIPTION
nanosleep delays the execution of the program for at least the time specified in *req. The function can return earlier if a signal has
been delivered to the process. In this case, it returns -1, sets errno to EINTR, and writes the remaining time into the structure pointed
to by rem unless rem is NULL. The value of *rem can then be used to call nanosleep again and complete the specified pause.
The structure timespec is used to specify intervals of time with nanosecond precision. It is specified in <time.h> and has the form
struct timespec
{
time_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
};
The value of the nanoseconds field must be in the range 0 to 999 999 999.
Compared to sleep(3) and usleep(3), nanosleep has the advantage of not affecting any signals, it is standardized by POSIX, it provides
higher timing resolution, and it allows to continue a sleep that has been interrupted by a signal more easily.
ERRORS
In case of an error or exception, the nanosleep system call returns -1 instead of 0 and sets errno to one of the following values:
EINTR The pause has been interrupted by a non-blocked signal that was delivered to the process. The remaining sleep time has been written
into *rem so that the process can easily call nanosleep again and continue with the pause.
EINVAL The value in the tv_nsec field was not in the range 0 to 999 999 999 or tv_sec was negative.
BUGS
The current implementation of nanosleep is based on the normal kernel timer mechanism, which has a resolution of 1/HZ s (i.e, 10 ms on
Linux/i386 and 1 ms on Linux/Alpha). Therefore, nanosleep pauses always for at least the specified time, however it can take up to 10 ms
longer than specified until the process becomes runnable again. For the same reason, the value returned in case of a delivered signal in
*rem is usually rounded to the next larger multiple of 1/HZ s.
As some applications require much more precise pauses (e.g., in order to control some time-critical hardware), nanosleep is also capable of
short high-precision pauses. If the process is scheduled under a real-time policy like SCHED_FIFO or SCHED_RR, then pauses of up to 2 ms
will be performed as busy waits with microsecond precision.
CONFORMING TO
POSIX.1b (formerly POSIX.4).
SEE ALSO sleep(3), usleep(3), sched_setscheduler(2), timer_create(2)Linux 1.3.85 1996-04-10 NANOSLEEP(2)