A simpler alternative:
This behaves differently from Scrutinizer's version. While his will reset the timer to 10s, this version will add another 10s interval once the current interval expires. If this is acceptable, the simpler code may be a viable option.
i wrote a while script as part of a huge program. this script, once picked, begins to output data to the person using it. pretty easy, as the person doesn't have to keep typing commands to get the output that the while loop automatically throws out.
now, the thing is, while this while-script... (3 Replies)
I have a very basic bash shell script, which has many "while... done; for .... done" loop clauses, like the following
~~
#!/bin/bash
while blablalba; do
....
done < /tmp/file
for line in `cat blablabla`; do grep $line /tmp/raw ; done > /tmp/1;
while blablalba2; do
....
done <... (2 Replies)
Hi All,
I am stuch in a script where a for loop is running to execute some commands for some values.
Now my problem is i have to have an if condition that if the first iteration is successful then it has to exit the for loop otherwise it has to continue normally.
my code is this:
for... (5 Replies)
hi,
how to exit from "if" loop?actually i have mutliple "if" conditions, i have to exit from each "if" loop,if it is true...:confused:
Please suggest me... (3 Replies)
Below for loop not exiting. Can someone help?
JBOSS_INST_ARGS=01 02
if ; then
for i in $JBOSS_INST_ARGS; do
/u/jboss-6.1.0.Final/bin/jboss_init_wise$i.sh start;
done (8 Replies)
Hi, I have written a script that allows me to repetitively play a music file $N times, which is specified through user input. However, if I want to exit the script before it has finished looping $N times, if I use CTRL+c, I have to CTRL+c however many times are left in order to complete the loop.... (9 Replies)
Hi All,
I have one shell script start.sh which executes another shell script test.sh something like below :test.sh -param1 -param2
In the test.sh there is one command for removing file:rm file1.bak
I want whenever I execute start.sh, it will execute test.sh and if it finds string rm... (7 Replies)
I am trying to check multiple server's "uptime" in a loop over "ssh".
When I execute multiple ssh commands with hard coded servernames script is executing fine.
But when I pass server names using while loop, script is exiting after checking first server's status, why?
# serverList... (8 Replies)
I am trying to loop through lots and lots of folders and use the names of the folders to run a Python script which has parameters.
E.g.
-- setup_refs -n John -f England/London/Hackney/John -c con/con.cnf
Normally to run `setup_refs` once from command line it's: `python setup_refs.py -n John... (3 Replies)
Morning all,
I am attempting to complete the below script which will do the following (skip the ping part) using Bash.
Prompts the user to type in a URL to download, or to type exit to exit the script.
If a URL is typed, wget to download the webpage and then loop back to prompting for a... (2 Replies)
Discussion started by: Jgerds1990
2 Replies
LEARN ABOUT NETBSD
getitimer
GETITIMER(2) BSD System Calls Manual GETITIMER(2)NAME
getitimer, setitimer -- get/set value of interval timer
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/time.h>
int
getitimer(int which, struct itimerval *value);
int
setitimer(int which, const struct itimerval * restrict value, struct itimerval * restrict ovalue);
DESCRIPTION
The system provides each process with three interval timers, defined in <sys/time.h>. The getitimer() call returns the current value for the
timer specified in which in the structure at value. The setitimer() call sets a timer to the specified value, returning the previous value
of the timer if ovalue is not NULL.
A timer value is defined by the itimerval structure:
struct itimerval {
struct timeval it_interval; /* timer interval */
struct timeval it_value; /* current value */
};
If it_value is non-zero, it indicates the time to the next timer expiration. If it_interval is non-zero, it specifies a value to be used in
reloading it_value when the timer expires. Setting it_value to 0 disables a timer. Setting it_interval to 0 causes a timer to be disabled
after its next expiration (assuming it_value is non-zero).
The which parameter specifies the type of the timer:
ITIMER_REAL timer decrements in real time. This timer is affected by adjtime(2) and settimeofday(2). A SIGALRM signal is
delivered when this timer expires.
ITIMER_VIRTUAL timer decrements in process virtual time. It runs only when the process is executing. A SIGVTALRM signal is deliv-
ered when it expires.
ITIMER_PROF timer decrements both in process virtual time and when the system is running on behalf of the process. It is
designed to be used by interpreters in statistically profiling the execution of interpreted programs. Each time the
ITIMER_PROF timer expires, the SIGPROF signal is delivered. Because this signal may interrupt in-progress system
calls, programs using this timer must be prepared to restart interrupted system calls.
ITIMER_MONOTONIC timer decrements in monotonic time. This timer is not affected by adjtime(2) and settimeofday(2). A SIGALRM signal
is delivered when this timer expires.
Note that:
o Time values smaller than the resolution of the system clock are rounded up to this resolution (typically 10 milliseconds).
o The interaction between setitimer() and alarm(3) or sleep(3) is unspecified by the specification.
RETURN VALUES
If the calls succeed, a value of 0 is returned. If an error occurs, the value -1 is returned, and a more precise error code is placed in the
global variable errno.
ERRORS
Both functions may fail if:
[EFAULT] The value parameter specified a bad address.
[EINVAL] The which parameter was not a known timer type, or the value parameter specified a time that was too large to be handled.
SEE ALSO gettimeofday(2), select(2), sigaction(2), itimerval(3), timeradd(3)STANDARDS
The functions conform to IEEE Std 1003.1-2001 (``POSIX.1''). The later IEEE Std 1003.1-2008 (``POSIX.1'') revision however marked both as
obsolescent, recommending the use of timer_gettime(2) and timer_settime(2) instead.
HISTORY
The getitimer() function call appeared in 4.2BSD. The ITIMER_MONOTONIC functionality appeared in NetBSD 6.0.
BSD October 27, 2011 BSD