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Full Discussion: Extract line between two patterns
Top Forums Shell Programming and Scripting Extract line between two patterns Post 302738839 by rajamohan on Monday 3rd of December 2012 01:55:22 AM
Old 12-03-2012
Quote:
Originally Posted by Don Cragun
I believe this does what you want:
Code:
awk -F';' '/^COMMAND:/{
        found=1
        if(saved) print saved
}
/^REQUESTSTRING:/{
        if(found) saved = $1
}' input

----------------------------
Oops. I looked too closely at the expected output and missed the part about needing SEARCHPATTERN. The above script happens to work with the sample input, but is not correct in the general case.

What I should have said is something more like:
Code:
awk -F';' '/^COMMAND:/{
        if(fc && fs && saved) print saved
        fc = 1
        saved = ""
        fs = 0
}
/^REQUESTSTRING:/{
        if(fc) saved = $1
}
/SEARCHPATTERN/{
        fs = 1
}
END {   if(fc && fs && saved) print saved}' input

but elixir_sinari's proposal is shorter and should work fine as long as the input file doesn't violate the assumptions made. And, given the sample input, the assumptions look perfectly reasonable to me.
Thanks a lot.. Don Cragun.. its working good..

---------- Post updated at 01:55 AM ---------- Previous update was at 01:53 AM ----------

Quote:
Originally Posted by michaelrozar17
Through Sed..
Code:
 sed -n 'H;/^$/{x;/COMMAND.*SEARCHPATTERN/s/.*\(REQUESTSTRING[^;]*\);.*/\1/p}' inputfile

Thanks a lot michaelrozar17.
Its very simple and working good..
 

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LEARN ABOUT REDHAT

setresgid

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

NAME

       setresuid, setresgid - set real, effective and saved user or group ID

SYNOPSIS

       #include <unistd.h>

       int setresuid(uid_t ruid, uid_t euid, uid_t suid);
       int setresgid(gid_t rgid, gid_t egid, gid_t sgid);

DESCRIPTION

       setresuid sets the real user ID, the effective user ID, and the saved set-user-ID of the current process.

       Unprivileged  user  processes  (i.e.,  processes with each of real, effective and saved user ID nonzero) may change the real, effective and
       saved user ID, each to one of: the current uid, the current effective uid or the current saved uid.

       The super-user may set real, effective and saved user ID to arbitrary values.

       If one of the parameters equals -1, the corresponding value is not changed.

       Completely analogously, setresgid sets the real, effective and saved group ID's of the current process, with the same restrictions for pro-
       cesses with each of real, effective and saved user ID nonzero.

RETURN VALUE

       On success, zero is returned.  On error, -1 is returned, and errno is set appropriately.

ERRORS

       EPERM  The current process was not privileged and tried to change the IDs is a not allowed way.

CONFORMING TO

       This call is nonstandard.

HISTORY

       This  system  call  was first introduced in HP-UX.  It is available under Linux since Linux 2.1.44.  These days it is also found in FreeBSD
       (for emulation of Linux binaries).

NOTES

       Under HP-UX and FreeBSD the prototype is found in <unistd.h>.  Under Linux there is so far no include file giving the prototype - this is a
       glibc bug. Programs using this system call must add the prototype themselves.

SEE ALSO

       getuid(2), setuid(2), setreuid(2), getresuid(2)

Linux 2.1.44							    2001-11-15							      SETRESUID(2)
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