Hi,
Can you explain little bit with example regarding SED utility in UNIX?
How iit is different then grep command?
Thanks in advance.
Malay (4 Replies)
Hi,
I was wondering if there was a way to append something to filenames based on a wildcard. For example, if I have the following files in a directory:
blah1
blah2
blah3
blah4
blah5
I want to rename these all to:
blah1.txt
blah2.txt
blah3.txt
blah4.txt
blah5.txt
Is there a... (4 Replies)
Hi,
I've been searching for a quick way to do this with sed, but to no avail.
I have a file containing a long series of (windows) file paths that are separated by the pattern '@'. I would like to extract each file path so that I can later assign a variable to each path.
Here is the file:... (2 Replies)
1. The problem statement, all variables and given/known data:
saferm is a replacement for the rm utility. Rather than removing files, it move files in a sub directoy called".saferm" in the user's home directory. If "~/.saferm" doesn't exist, it is automatically created. The -l options lists the ... (3 Replies)
I am looking at using grep to locate the line in the text file and them use awk to select a word or words out of it.
I know awk needs -v to allow a variable to be used, but also needs -F to allow the break up of the sentence and allow the location of separate variables.
$line = grep "1:" File |... (8 Replies)
Hello,
I am a java programmer but want to try unix for a purpose where I need to reduce a file using its first field.. Here is the sample data:
admin;2;0;;
admission;8;0;;
aman;1;0;;
caroline;0;4;;
cook;0;4;;
cook;2;0;;
far;0;3;;
far;1;5;;
I am explaining the dataset first. There... (5 Replies)
{
"AFafa": "FAFA","AFafa": "FAFA"
"baseball":"soccer","wrestling":"dancing"
"rhinos":"crocodiles","roles":"foodchain"
}
I need to insert a new line before the closing brackets "}" so that the final output looks like this:
{
"AFafa": "FAFA","AFafa": "FAFA"... (6 Replies)
Regularly we have questions like: i have an XML (C, C++, ...) file with this or that property and i want to extract the content of this or that tag (function, ...). How do i do it in sed?
Yes, in some (very limited) cases this is possible, but in general this can't be done. That is: you can do... (0 Replies)
Discussion started by: bakunin
0 Replies
LEARN ABOUT NETBSD
pidfile
PIDFILE(3) BSD Library Functions Manual PIDFILE(3)NAME
pidfile -- write a daemon pid file
LIBRARY
System Utilities Library (libutil, -lutil)
SYNOPSIS
#include <util.h>
int
pidfile(const char *path);
DESCRIPTION
pidfile() creates a file containing the process ID of the caller program. The pid file can be used as a quick reference if the process needs
to be sent a signal. When the program exits, the pid file is removed automatically, unless the program receives a fatal signal.
If path is NULL or a plain basename (a name containing no directory components), the pid file is created in the /var/run directory. The file
name has the form /var/run/basename.pid. The basename part is either the value of path if it was not NULL, or the program name as returned
by getprogname(3) otherwise.
If path is an absolute or relative path (i.e. it contains the '/' character), the pid file is created in the provided location.
Note that only the first invocation of pidfile() causes a pid file to be written; subsequent invocations have no effect unless a new path is
supplied. If called with a new path, pidfile() will remove the old pid file and write the new one.
RETURN VALUES
pidfile() returns 0 on success and -1 on failure.
SEE ALSO atexit(3)HISTORY
The pidfile() function call appeared in NetBSD 1.5. Support for creating pid files in any arbitrary path was added in NetBSD 6.0.
BUGS
pidfile() uses atexit(3) to ensure the pid file is unlinked at program exit. However, programs that use the _exit(2) function (for example,
in signal handlers) will not trigger this behaviour.
BSD March 23, 2011 BSD