This is how i see my code working with the file descriptors and pipes and well every thing. Take a look at the picture to see what i am talking about, it is very descriptive and took a long time to do in paint so please take a look.
I have a simple script that I want to run every 30 minutes but only when I execute it. I don't want it to be a crontab job.
so i have for example
date
ls -l
who
sleep 1800
The first time it executes correctly but after the first time it nevers execute back again. It should execute after... (2 Replies)
Anyone have an idea why this if statement does not work correctly?
"test2.sh" 18 lines, 386 characters
#!/usr/bin/sh
WARNING=80
CRITICAL=95
check_it()
{
if ] || ];then
echo "YES ] || ]"
else
echo "NO ] || ]"
fi
}
check_it 80.1
check_it 81.1 (3 Replies)
Hi,
I have a script where I am trying to set a local variable using the following,
MYVAR="$NAME"_"$NAME2".txt
where say,
NAME = one
NAME2 = two
so I want the output one_two.txt but what I am getting is,
two.txt
basically the $NAME2 is overwriting, what am I doing wrong?
... (3 Replies)
egrep -A 7 -m 2 -h 'Date:|Time:' *.html
this is showing only 2 line after the context of the 2nd found match. Is this a bug in grep?
egrep -A 7 -m 2 -h 'Time:' *.html - this works correctly (2 Replies)
I am trying to copy 2 types of files so I can archive them. I tested with a set of commands:
touch -t $(date -d "-60 day" +%Y%m%d) WORKDIR/REF
find TARGETDIR/ -type f -maxdepth 1 -iname \*.out\* -or -iname \*.log\* ! -newer WORKDIR/REF -exec ls -l {} \;
This correctly lists any files in the... (2 Replies)
We are using Red Hat linux system.
I am transferring my rman backup files to another server.
Here is the command i am using to transfer the files.
/usr/bin/rsync -avpP --delete /xyz/xyz/ 99.99.999.99::db110bkp
Here is the rsync version.
>rsync --version
rsync version 3.0.6 ... (1 Reply)
Consider the following code:
grep -o -e '^STEAM_::\d+$' workfile3.tmp
A sample format of a valid string for the regexp would be:
STEAM_0:1:12345678
Here is an example line from the workfile3.tmp file:
465:L 01/02/2012 - 00:05:33: "Spartan1-1-7<8><STEAM_0:1:47539638><>" connected
No... (2 Replies)
Hi
I am attempting to right a script which will read a table and extract specfic information.
LASTFAILEDJOB=/usr/openv/netbackup/scripts/GB-LDN/Junaid/temp_files/lastfailedjob
cat /usr/openv/netbackup/scripts/GB-LDN/Junaid/temp_files/lastfailedjob
237308646
If i run the following... (5 Replies)
Hello All,
Yesterday, all day, I was using x11vnc and vncviewer to connect to a server. But today for some reason it is not working. I don't
remember changing any settings or anything like that, but because it stopped working correctly I guess something has...?
I'm issuing the exact same... (0 Replies)
Today I saw the topic. sum-even-numbers-1-100 At that time, it was already closed but not the point. Other thoughts came to mind.
All newcomers to Haskell are afraid that when they study it, their brains will turn inside out. I did not notice anything like that. And all because the brains of all... (4 Replies)
Discussion started by: nezabudka
4 Replies
LEARN ABOUT OPENSOLARIS
dup
dup(2) System Calls dup(2)NAME
dup - duplicate an open file descriptor
SYNOPSIS
#include <unistd.h>
int dup(int fildes);
DESCRIPTION
The dup() function returns a new file descriptor having the following in common with the original open file descriptor fildes:
o same open file (or pipe)
o same file pointer (that is, both file descriptors share one file pointer)
o same access mode (read, write or read/write).
The new file descriptor is set to remain open across exec functions (see fcntl(2)).
The file descriptor returned is the lowest one available.
The dup(fildes) function call is equivalent to:
fcntl(fildes, F_DUPFD, 0)
RETURN VALUES
Upon successful completion, a non-negative integer representing the file descriptor is returned. Otherwise, -1 is returned and errno is set
to indicate the error.
ERRORS
The dup() function will fail if:
EBADF The fildes argument is not a valid open file descriptor.
EINTR A signal was caught during the execution of the dup() function.
EMFILE The process has too many open files (see getrlimit(2)).
ENOLINK The fildes argument is on a remote machine and the link to that machine is no longer active.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |Async-Signal-Safe |
+-----------------------------+-----------------------------+
SEE ALSO close(2), creat(2), exec(2), fcntl(2), getrlimit(2), open(2), pipe(2), dup2(3C), lockf(3C), attributes(5), standards(5)SunOS 5.11 28 Dec 1996 dup(2)