can shell script do this job pls？

ailms

用uniq和sort就可以实现了

Mercury_cn

[quote]原帖由 "BJTD"]i know i can write a small c application to do this combining with sed. ....[/quote 发表：


这句话好费解,C还是SED?

luvlm

uniq seams can not do the job.

reason: lines in f2 are not necessarily the same as in f1

if you gurus read the original poster carefully.

BJTD

原帖由 "luvlm" 发表：
uniq seams can not do the job.

reason: lines in f2 are not necessarily the same as in f1

if you gurus read the original poster carefully.

indeed.  however, you can specify parameter -w,
which can reasonably do the job in my situation.


thank you all!

BJTD

原帖由 "Mercury_cn" 发表：

这句话好费解,C还是SED?

forgive my poor english

i meant calling sed/awk from my c application~~

BJTD

one problem with this solution (cat f1 f2 |sort| uniq -u) is that:

if f1 has dulicated lines which contains a line in f2.

(maybe do the command a few times)