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Full Discussion: Extract a string between 2 ref string from a file
Top Forums Shell Programming and Scripting Extract a string between 2 ref string from a file Post 302640837 by jao_madn on Tuesday 15th of May 2012 10:59:45 AM
Old 05-15-2012
Quote:
Originally Posted by Scrutinizer
If your grep knows "-o", you could try something like:
Code:
grep -o 'watch?v=[^&;]*'

@Scrutinizer: works fine thanks, i would like to ask also how to exclude the empty 11 character, the results include the "watch?v=<empty>" i would like to exclude this one,

@bartus11: thanks also, but it will only works if all lines contain the
Quote:
<unneeded char>href="/watch?v=IbkAXOmEHpY&amp;feature=plcp<unneeded char>
"works if grep first and all lines contain the refference, the file contains also some other character or some lines thats doesn't have
Quote:
<unneeded char>href="/watch?v=IbkAXOmEHpY&amp;feature=plcp<unneeded char>
it seems i print also other line with other field set, by the way the file is a source web page.

By the way thanks for a quick response.
 

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LEARN ABOUT X11R4

inotify_rm_watch

INOTIFY_RM_WATCH(2)					     Linux Programmer's Manual					       INOTIFY_RM_WATCH(2)

NAME

       inotify_rm_watch - remove an existing watch from an inotify instance

SYNOPSIS

       #include <sys/inotify.h>

       int inotify_rm_watch(int fd, int wd);

DESCRIPTION

       inotify_rm_watch()  removes the watch associated with the watch descriptor wd from the inotify instance associated with the file descriptor
       fd.

       Removing a watch causes an IN_IGNORED event to be generated for this watch descriptor.  (See inotify(7).)

RETURN VALUE

       On success, inotify_rm_watch() returns zero.  On error, -1 is returned and errno is set to indicate the cause of the error.

ERRORS

       EBADF  fd is not a valid file descriptor.

       EINVAL The watch descriptor wd is not valid; or fd is not an inotify file descriptor.

VERSIONS

       Inotify was merged into the 2.6.13 Linux kernel.

CONFORMING TO

       This system call is Linux-specific.

SEE ALSO

       inotify_add_watch(2), inotify_init(2), inotify(7)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Linux								    2017-09-15						       INOTIFY_RM_WATCH(2)
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