from matched line till the next blank line 1

[ogniemi]

hello,

the input is:

ccccccccc
vvvvvvvvvvvv
bbbbbbbbbbb
abc fgg
sssssssssssssss
ssssssssssssssss
ssssssssssssssss

dddddddd
ffffffffff

ddddddddddddddd
def g
dddddddddd
ddddddddddddddd
ddddddddddddd

vvvvvvvv
abc h h
eeeeeeeeeeee
eeeeeeeeeeeee
eeeeeeeee

fffffffffff
gggggggggg

abc jh h
ffffffffffffffff
fffffffffffff
fffffffffff
[EOF]

how to get each from ^abc and from def^ till empty line (if in the last one the are no empty line then till end of file)
and finally get:

abc fgg
sssssssssssssss
ssssssssssssssss
ssssssssssssssss

def g
dddddddddd
ddddddddddddddd
ddddddddddddd

abc h h
eeeeeeeeeeee
eeeeeeeeeeeee
eeeeeeeee

abc jh h
ffffffffffffffff
fffffffffffff
fffffffffff

thank you in advance.

 

[feherke]

Hi

sed -n '/^\(abc\|def\)/,/^$/p' /path/to/input

[gray]# or[/gray]

awk '/^(abc|def)/,$0==""' /path/to/input

Tested with GNU [tt]sed[/tt], [tt]gawk[/tt] and [tt]mawk[/tt].

Feherke.

http://free.rootshell.be/~feherke/

 

[feherke]

Hi

Oops, I forgot to mention one thing. If the starting "abc" and "def" are whole words, then better avoid regular expressions in the [tt]awk[/tt] solution :

awk '$1=="abc"||$1=="def",$0==""' /path/to/input

Tested with [tt]gawk[/tt] and [tt]mawk[/tt].

Feherke.

http://free.rootshell.be/~feherke/