tail: track file size only in -f mode
authorDenys Vlasenko <vda.linux@googlemail.com>
Tue, 2 Jul 2013 18:09:15 +0000 (20:09 +0200)
committerDenys Vlasenko <vda.linux@googlemail.com>
Tue, 2 Jul 2013 18:09:15 +0000 (20:09 +0200)
commit6651e4260955d159e6a4f794d0a69c1b3f8e670c
treeee1417b778865b3115a12f4e1295f90cea7d50f5
parentcd8eece88ed6da58209a18a8c3edac73eab27e1c
tail: track file size only in -f mode

This eliminates extra fstat and lseek calls on every read

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
coreutils/tail.c