Hi Ymir!
On Thu, 18 Apr 2002, Ymir wrote:
> Am intalnit o ciudatenia a bash-ului, si ma intrebam daca cineva poate sa
> imi explice de ce se intampla ce se intampla.
>
> ymir@ovid:~$ tty | awk -F '/dev/' '{print $2}'
> tty2
> ymir@ovid:~$ w | grep tty2
> ymir tty2 - 11:05 0.00s 0.11s 0.02s w
> ymir@ovid:~$ w | grep `tty | awk -F '/dev/' '{print $2}'`
> Usage: grep
> [OPTION]... PATTERN [FILE]...
> Try `grep --help' for more information.
> ymir@ovid:~$ w | grep "`tty | awk -F '/dev/' '{print $2}'`"
> 11:08:34 up 1 day, 15:04, 5 users, load average: 0.01, 0.02, 0.00
> USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
> ymir tty1 - 11:04 31.00s 0.28s 0.20s ssh [EMAIL PROTECTED]
> ymir tty2 - 11:05 0.00s 0.10s 0.01s w
> ymir tty10 - 11:03 4:41 0.08s 0.08s -bash
> ymir tty11 - 11:02 3.00s 0.44s 0.31s mutt
> ymir pts/1 :tty12:S.0 11:02 2:03 0.43s 0.43s irssi -n Ymir
>
> Ce este si mai ciudat, este:
> ymir@ovid:~$ echo "w | grep `tty | awk -F '/dev/' '{print $2}'`" | bash -
> ymir tty2 - 11:05 0.00s 0.13s 0.00s bash -
la un prim ochi pare a fi o problema de prioritate intre pipa si backticks.
la ce anume te referi ca e ciudat? `Usage:..'?
-- teodor
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