However, I did have some issues running under bash 4.4.12(3) in a cygwin environment. It appears that the pipe write sometimes blocks waiting for a reader, causing things to lock up after a sha1 is calculated for the first line.
After a little bit of playing with it I came up with this modification, that appears to be a little more stable and reduces the number of FIFOs to 3.
Here I use file descriptor 7 and 9 for the read and write ends of std0. Avoiding using the external awk program, should also have it run faster:
I'd like some help with awk too.
Somewhere in my bash script i have written something like this:
awk -v outputfile=$finalFile -v inputf=$file 'BEGIN { commands }
{ more commands }
ΕND{ }' inputf
where the file is a .input file with data.
I also tried this:
awk -v... (2 Replies)
Hi Guys,
I was just trying to run a bunch of test scripts which ran perfectly before i changed servers to a different solaris machine. But i just changed it to run on a different solaris version and my awk statement in the script shows an error.
awk BEGIN{s=ARGV; r=ARGV; \
... (2 Replies)
Hello all,
I am creating a small bash script to cycle through some files that are the results of an analysis I have run (I am a statistician). There are many folders called job001, job002,...,job135. Each folder has a text file called results.txt. I want to create two summary files of the... (3 Replies)
I have a shell script with the following awk command.
awk '$1 == "GEOG_SRV"{split($2,a,":");print a}' /etc/qm
when I run it manually command line its fine and giving the output.
bash-3.00$ awk '$1 == "GEOG_SRV"{split($2,a,":");print a}' /etc/qm
9010
But in the script its... (5 Replies)
I just tried
awk '{print}' all.plo
awk: cannot open all.plo (Value too large for defined data type)awk '{print $8"-"$7"-"$6,$9,$4,$5,$12,$15}' all.plo
awk: cannot open all.plo (Value too large for defined data type)
datafile size is 4.8GB
any other provision ? only cat works
FS is... (4 Replies)
To whom it may concern,
Please help! I am trying to use awk to open all the files in a folder and remove one row and append everything into an output file.
for X in `ls /Users/misssmith/Desktop/birdseed/`; do awk '(NR==546412)' /Users/misssmith/Desktop/birdseed/$X >>... (6 Replies)
Hi ,
In a directory i've the files in the following format
pay:year:mon:11789604
pay:year:mon:17675644
---
and i need to get 4th part of the above file name
so i used awk command in the below code
#!/bin/ksh
for test_data in pay*
do
txt_awk = awk -F':' '{print $4;}' $test_data
... (7 Replies)
Good evening, Im newbie at unix specially with awk
From an scheduler program called Autosys i want to extract some data reading an inputfile that comprises jobs names, then formating the output to columns for example
1.
This is the inputfile:
$ more MapaRep.txt
ds_extra_nikira_usuarios... (18 Replies)
Dear Community;
I have a csv file with msb and lsb in $3 and $5 fields which provides the epochtime (factor 65536). Further I need to convert epochtime to readable datetime.
But am getting an error.
File Sample:
5000a,1000,20671,0,16421,0,1,NULL,0
5000b,1000,20974,0,-16284,0,1,NULL,0... (4 Replies)
Discussion started by: mystition
4 Replies
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pthread_rwlock_wrlock
pthread_rwlock_wrlock(3T)pthread_rwlock_wrlock(3T)NAME
pthread_rwlock_wrlock(), pthread_rwlock_trywrlock() - lock or attempt to lock a read-write lock for writing
SYNOPSIS PARAMETERS
rwlock Pointer to the read-write lock to be locked for writing.
DESCRIPTION
The function applies a write lock to the read-write lock object 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 (that is, it does not return from the call)
until it can acquire the lock. Results are undefined if the calling thread holds the read-write lock (whether a read or a write lock) at
the time the call is made.
The function applies a write lock as in the function with the exception that the function fails if any thread currently holds rwlock (for
reading or writing).
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, upon return from the signal handler, the thread shall resume waiting
for the read-write lock as if it was not interrupted.
RETURN VALUE
Upon successful completion, and return zero. Otherwise, an error number is returned to indicate the error (the variable is not set).
ERRORS
If any of the following occur, the function returns the corresponding error number:
[EBUSY] The read-write lock rwlock could not be acquired for writing because it was already locked for reading or writing.
For each of the following conditions, if the condition is detected, the and functions return the corresponding error number:
[EINVAL] The value specified by rwlock does not refer to an initialized read-write lock.
[EDEADLK] The current thread already owns the read-write lock for reading or writing.
AUTHOR
and were developed by X/Open.
SEE ALSO pthread_rwlock_init(3T), pthread_rwlock_destroy(3T), pthread_rwlock_tryrdlock(3T), pthread_rwlock_rdlock(3T), pthread_rwlock_unlock(3T).
STANDARDS CONFORMANCE
Pthread Library pthread_rwlock_wrlock(3T)