I want to make a logfile with error messages, like this:
(collumms: CUSTNR DATE TIME ERROR MESSAGE)
102 20020807 135417 1 Uptime server is more than 6 months
5 20020808 111335 3 Backup not Ok!
2001 20020808 120428 6 Free space at server1 is less than 20%
etcetera
I... (2 Replies)
Hi
How could I use the command printf to display a big file.
So ex. I've a script with some variables like:
V1=358504 V2=FD0147 V3=dev5 V4=94577 V5=0 V6=UNIX V7=Policy V8=server V9=04/15/05 V10=19:18:41 V11=2341321467
while read V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11
do
printf "\n%s %s %s... (1 Reply)
Hi,
I am very confused with my printf command.
Somehow one variable can't line up with others...
newstart2 ="Mon Nov 11 01 00:00:00 2002"
printf "%-20s" $newstart2
Here is the output:
Mon Nov 11
01 00:00:00 2002
It spread out to two lines..
Why? (1 Reply)
hello, Im at another part of the program i am writing. Where i think i'm going to need to use the printf command.
If anyone can help me figure out the printf layout i would greatly appreicate it.
thanks (4 Replies)
hello,
I'm trying to display Unix variable using printf command.
Code:
awk '{ if ( $0 ~ /string/ ) {
printf( "%s\n%s\n",$0,"dsd"); #this one works
printf( "%s\n%s\n",$0,$HOME); #this does not work
} else {
print $0;
}
}' param1_1.txt
I could use here echo command but I'm... (2 Replies)
A big hello to everyone tagged to this site of knowledge . This is the first post of mine and I am looking forward to an enjoyable stint in this forum where I get to know a lot of new ideas and share whatever knowledge (its not much though :) ) I have acquired throughout my career so far with... (4 Replies)
Discussion started by: kumarjt
4 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)