Hi
I wanted to cut the feilds comming after % and After $ at one go
can we do some thing like this cut -f 2 -d "%|$" (But it doesnot work)
Input File
BWPG %TCPRP1 $SCSPR000
BWPH %TCPRP1 $SCSPR003
BWPI %TRTYUP ResourceDescription="IMPRIMANTE " $BWOPTY
BWPJ %ZOMBIE ... (4 Replies)
I'm working on formatting some attendance data to meet a vendors requirements to upload to their system. With some help on the forums here, I have the data close. But they've since changed what they want.
The vendor wants me to submit three fields to them. Field 1 is the studentid field,... (4 Replies)
I just discovered, to my dismay, the following part of the cut man page:
-f, --fields=LIST
select only these fields;
also print any line that contains no delimiter character, unless the -s option is specified
The -s option toggles the printing of lines with no delimiters.
In most... (3 Replies)
Hi All,
I am trying to cut to do a cut operation, but since there are seems to be more than one deltimiters in some occasion I am not able to get the exact field. Can you please provide an SED and AWK script for treating the source file in such a way that all consecutive delimiters are treated... (3 Replies)
I'm having bother getting both lines contained in a file to output as the same value.
A simple example:
john:123456:123:456:doe
john:123456:123:doe
cut -d: -f1,4 input file
john:456
john:doe ^ first line should be same as second.
trick one for me, i know why it's because of the... (4 Replies)
I'm a complete beginner in UNIX (and not a computer science student either), just undergoing a tutoring course. Trying to replicate the instructions on my own I directed output of the ls listing command (lists all files of my home directory ) to My_dir.tsv file (see the screenshot) to make use of... (9 Replies)
Hi All,
I have a file with a single row having the following text
ABC.ABC.ABC,Database,New123,DBNAME,F,ABC.ABC.ABC_APP,"@FUNCTION1("ENT1") ,@FUNCTION2("ENT2")",R,
I want an output in the following format
ABC.ABC.ABC DBNAME ABC.ABC.ABC_APP '@FUNCTION1("ENT1")... (3 Replies)
I have a text file with many thousands of lines, a small sample of which looks like this:
InputFile:PS002,003 D -1 5 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 6 6 -1 -1 -1 -1 0 509 0
PS002,003 PSQ 0 1 7 18 1 0 -1 1 1 3 -1 -1 ... (5 Replies)
BASH : I have a very long list I am parsing through:
10/10/19... (5 Replies)
Discussion started by: jeffs42885
5 Replies
LEARN ABOUT NETBSD
vfs_hooks_unmount
VFS_HOOKS(9) BSD Kernel Developer's Manual VFS_HOOKS(9)NAME
vfs_hooks, vfs_hooks_unmount -- VFS hooks interface
SYNOPSIS
#include <sys/param.h>
#include <sys/mount.h>
void
vfs_hooks_unmount(struct mount *mp);
DESCRIPTION
The VFS hooks interface provides a way for different kernel subsystems to attach custom functions to specific VFS operations. This enforces
code separation by keeping the VFS's core sources uncluttered and makes all subsystem functionality reside in a single place. As an example,
this interface is used by the NFS server code to automatically handle the exports list for each mount point.
Hooks are described by a struct vfs_hooks object, as seen below:
struct vfs_hooks {
int (*vh_unmount)(struct mount *);
};
For simplicity, each field is named after the VFS operation it refers to. The purpose of each member function, alongside some important
notes, is shown below:
vh_unmount(mp)
This hook is executed during the unmount process of a file system.
For more information about the purpose of each operation, see vfsops(9). Note that any of these fields may be a null pointer.
After the definition of a struct vfs_hooks object, the kernel has to add it to the vfs_hooks link set using the VFS_HOOKS_ATTACH(struct
vfs_hooks *) macro.
Please note that this interface is incomplete on purpose to keep it in its smallest possible size (i.e., do not provide a hook that is not
used). If you feel the need to hook a routine to a VFS operation that is not yet supported by this interface, just add it to the files
described in CODE REFERENCES.
FUNCTIONS
The following functions are provided to the VFS code to run the hooked functions:
vfs_hooks_unmount(mp)
Runs all hooks for the VFS unmount operation. Given that these operations shall not fail, it returns void.
CODE REFERENCES
The VFS hooks interface is implemented within the files sys/kern/vfs_hooks.c and sys/sys/mount.h.
SEE ALSO intro(9), vfs(9), vfsops(9)HISTORY
The VFS hooks interface appeared in NetBSD 4.0.
BSD September 23, 2005 BSD