I have a shell script that runs all the time looking for a certain type of file and then it processes the file through a series of other scripts. The script is watching a directory that has files uploaded to it via SFTP. It already checks the size of the file to make sure that it is not still... (3 Replies)
Hi All,
I am very new to Shell scripting...
I got a requirement.
I will have few text files(data files) in a particular directory. they will be with .txt extension. With same name, but with a different extension control files also will be there. For example, Sample_20081001.txt is the data... (4 Replies)
Hello,
say suppose i am processing an file emp.dat the field of which are
deptno empno empname etc
now say suppose i want to change the file to emp.lst then how can i do it? Here i what i attempted but in vain
BEGIN{
system("sort emp.dat > emp.lst")
FILENAME="emp.lst"
}
{
print... (2 Replies)
Hi I am working on the script parsing specific message "TEST" from multiple file. The log file name looks like:
N3.2009-11-26-03-05-02.console.log.tar.gz
N4.2009-11-29-00-25-03.console.log.tar.gz
N6.2009-12-01-10-05-02.console.log.tar.gz
I am using the following command:
zgrep -a --text... (1 Reply)
Hello everybody,
I have a little problem with one of my program. I made a plugin for collectd (a stats collector for my servers) but I have a problem to make it run in parallel.
My program gathers stats from logs, so it needs to run in background waiting for any new lines added in the log... (0 Replies)
i am having the input file as
below
123456789: xxxxx12xxxxxxxxxxxxxxxxxx a_cnt
123456789: xxxxxxxxxxxxxxxxxxxxxxx a_cnt
123456789: a_cnt xxxxaq1wsxxxxxxxxxxxx12xxxxxxxxxx
123456789: xxxxxxxxxxxxasxxxx a_cnt
i need the numbers in the backets of a_cnt
O/p required as below
1
2
3
4... (2 Replies)
Hi All,
The script below read the path and searches for the directories/subdirectories and for the files. If files are found in the sub directories then read the content of the all files and put the content in csv(comma delimted) format and the call the write to xml function to write the
std... (1 Reply)
Hello,
I extracted a list of files in a directory with the command ls . However this is not my computer, so the ls functionality has been revamped so that it gives the filesizes in front like this :
This is the output of ls command : I stored the output in a file filelist
1.1M... (5 Replies)
I have one input file ABC.txt and one output DEF.txt. After the ABC is processed and created output, I want to rename ABC.txt to ABC.orig and DEF to ABC.txt. Currently when I am doing this, it does not process the input file as it cannot read and write to the same file. How can I achieve this?
... (12 Replies)
Discussion started by: High-T
12 Replies
LEARN ABOUT POSIX
sem_wait
SEM_WAIT(3P) POSIX Programmer's Manual SEM_WAIT(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
NAME
sem_wait -- lock a semaphore
SYNOPSIS
#include <semaphore.h>
int sem_wait(sem_t *sem);
DESCRIPTION
Refer to sem_trywait().
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE /The Open Group 2013 SEM_WAIT(3P)