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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 302640799 by jao_madn on Tuesday 15th of May 2012 10:25:22 AM
Old 05-15-2012
Extract a string between 2 ref string from a file
Hi,

May i ask if someone share some command for extracting a string between 2 ref string in a txt file

My objective: i had a file with multiple lines and wants only to extract the string "watch?v=IbkAXOmEHpY" or "watch?v=<11 random character>", when i used "grep 'watch?=*' i got a results per line
Code:
<unneeded char>href="/watch?v=IbkAXOmEHpY&amp;feature=plcp<unneeded char>

, and used cut for finally.

What i would like is not having using grep and cut instead sed or similar built in command for extracting directly the "watch?v=IbkAXOmEHpY" without using grep first.

Maybe sed the first ref would be <href="> and end ref <&amp>

Im searching now and found some sed and perl but no luck at all..

Hope someone can share time..

Thanks in advance
Last edited by Scrutinizer; 05-15-2012 at 12:05 PM.. Reason: code tags instead of quote tags
 

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LEARN ABOUT XFREE86

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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