05-15-2013
For anyone reading this, the moral of this thread is ... if you don't spoonfeed the hungry, they won't thank you.
You're welcome,
Alister
This User Gave Thanks to alister For This Post:
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1. Shell Programming and Scripting
I seem to have gotten myself in over my head on this one. I need help combining lines together.
I have a text file containing 24,000 lines (exactly why I need awk) due to bad formatting it has separated the lines (ideally it should be 12,000 lines total).
Example of file:
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Discussion started by: blueheed
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2. Shell Programming and Scripting
I am using:
ps -A -o command,%cpu
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3. UNIX for Dummies Questions & Answers
It would be convenient to be able to combine awk tests. For example, suppose that I do this query:
awk '$1 != "Bob" || $1 != "Linda" {print $2}' datafileIs there a reasonable way to combine the conditions into a single statement? For example, in egrep, I can do:
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4. Shell Programming and Scripting
I have a file like this consisting of blocks separated by > of two number X and T
>
10 0
13 5.92346
16 10.3106
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22 16.9838
25 19.4407
28 21.4705
31 23.1547
34 24.6813
37 26.0695
40 27.3611
43 28.631
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49 30.9858
52 32.0934
55 33.1458 (6 Replies)
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5. Shell Programming and Scripting
I have a pretty simple script below:
#!/bin/sh
for i in *.cfg
do
temp=`awk '/^InputDirectory=/' ${i}`
input_dir=`echo ${temp} | awk '{ print substr( $0, 16) }'`
echo ${input_dir}
done
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6. Shell Programming and Scripting
Hi experts,
I have a requirement, In which I need to display the first and last line of a zip file where the line starts with "L". I've writen the code like below using sed and awk.
gunzip -c 20110203.1104.gz | awk '$1 ~ "^L" {print substr($0,178,15)}' | sed -n '1p;$p'
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7. Shell Programming and Scripting
Hello UNIX Community,
I have file that contains the following data:
testAwk2.csv
rabbit penguin goat
giraffe emu ostrich
hyena elephant panda
dog cat pig
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lion rhino spider
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8. Shell Programming and Scripting
I can achieve two tasks with 2 different awk commands:
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9. Shell Programming and Scripting
i have a datafile that has several lines that look like this:
2,dataflow,Sun Mar 17 16:50:01 2013,1363539001,2990,excelsheet,660,mortar,660,4
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10. Shell Programming and Scripting
the following code works perfectly for me:
# AWK 1
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if (NF == 10)
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LEARN ABOUT DEBIAN
pthread_rwlock_trywrlock
pthread_rwlock_wrlock(3C) pthread_rwlock_wrlock(3C)
NAME
pthread_rwlock_wrlock, pthread_rwlock_trywrlock - lock or attempt to lock read-write lock object for writing
SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>
int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock);
int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock);
The pthread_rwlock_wrlock() function applies a write lock to the read-write lock referenced by rwlock. The calling thread acquires the
write lock if no other thread (reader or writer) holds the read-write lock rwlock. Otherwise, the thread blocks until it can acquire the
lock.
The pthread_rwlock_trywrlock() function applies a write lock like the pthread_rwlock_wrlock() function, with the exception that the func-
tion fails if any thread currently holds rwlock (for reading or writing).
Writers are favored over readers of the same priority to avoid writer starvation. See pthread_rwlock_rdlock(3C).
Results are undefined if any of these functions are called with an uninitialized read-write lock.
If a signal is delivered to a thread waiting for a read-write lock for writing, upon return from the signal handler the thread resumes
waiting for the read-write lock for writing as if it was not interrupted.
If successful, the pthread_rwlock_wrlock() function returns 0. Otherwise, an error number is returned to indicate the error.
The pthread_rwlock_trywrlock() function returns 0 if the lock for writing on the read-write lock object referenced by rwlock is acquired.
Otherwise an error number is returned to indicate the error.
The pthread_rwlock_wrlock() function will fail if:
EDEADLK The current thread already owns the read-write lock for writing or reading.
The pthread_rwlock_trywrlock() function will fail if:
EBUSY The read-write lock could not be acquired for writing because it was already locked for reading or writing.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
pthread_rwlock_init(3C), pthread_rwlock_unlock(3C), pthread_rwlockattr_init(3C), pthread_rwlock_rdlock(3C), attributes(5), standards(5)
23 Mar 2005 pthread_rwlock_wrlock(3C)