[devel] make test: ! /bin/false

[devel] make test: ! /bin/false

[Alexey Tourbin]

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Скажите, почему так происходит?
make-3.81beta1-alt1

$ cat Makefile
test:
	! /bin/false
$ make test
! /bin/false
make: *** [test] Error 1
$

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Re: [devel] make test: ! /bin/false

[Eugene Ostapets]

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Alexey Tourbin пишет:

>Скажите, почему так происходит?
>make-3.81beta1-alt1
>
>$ cat Makefile
>test:
>	! /bin/false
>$ make test
>! /bin/false
>make: *** [test] Error 1
>$
>  
>
$ cat Makefile
eostapets@eugene ~/tmp/6 $ cat Makefile
test1:
    ! /bin/true
test2:
    ! /bin/false

$ make test1
! /bin/true
$ make test2
! /bin/false
make: *** [test2] Ошибка 1

Я думаю ответ понятен?:)
-- 
WBR,
Eugene Ostapets

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[devel] Re: make test: ! /bin/false

[Alexey Tourbin]

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On Mon, Sep 19, 2005 at 05:10:17PM +0300, Eugene Ostapets wrote:
> eostapets@eugene ~/tmp/6 $ cat Makefile
> test1:
>     ! /bin/true
> test2:
>     ! /bin/false
> 
> $ make test1
> ! /bin/true
> $ make test2
> ! /bin/false
> make: *** [test2] Ошибка 1
> 
> Я думаю ответ понятен?:)

$ /bin/sh -c '! /bin/false'; echo $?
1
$ /bin/sh -c '/bin/false'; echo $?
1
$

Надо изучить шелл... :)

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Re: [devel] Re: make test: ! /bin/false

[Eugene Ostapets]

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Alexey Tourbin пишет:

>Надо изучить шелл... :)
>  
>
Да уж, после того количества роботов не помешает... :)

-- 
WBR,
Eugene Ostapets

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Re: [devel] Re: make test: ! /bin/false

[Dmitry V. Levin]

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On Mon, Sep 19, 2005 at 06:48:32PM +0400, Alexey Tourbin wrote:
> Надо изучить шелл... :)

$ sh -c 'false'; echo rc=$?
rc=1
$ sh -c '/bin/false'; echo rc=$?
rc=1
$ sh -c '! false'; echo rc=$?
rc=0
$ sh -c '! /bin/false'; echo rc=$?
rc=1
$ type false
false is a shell builtin


-- 
ldv

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[devel] Re: make test: ! /bin/false

[Alexey Tourbin]

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On Mon, Sep 19, 2005 at 06:48:32PM +0400, Alexey Tourbin wrote:
> > Я думаю ответ понятен?:)
> 
> $ /bin/sh -c '! /bin/false'; echo $?
> 1
> $ /bin/sh -c '/bin/false'; echo $?
> 1
> $
> 
> Надо изучить шелл... :)

$ /bin/bash -c '! /bin/false'; echo $?
1
$ /bin/ash -c '! /bin/false'; echo $?
0
$ /bin/ksh -c '! /bin/false'; echo $?
0
$

questionable

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Re: [devel] Re: make test: ! /bin/false

[Dmitry V. Levin]

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On Mon, Sep 19, 2005 at 07:45:50PM +0400, Alexey Tourbin wrote:
> questionable

Portable way:

$ sh -c 'false; exit $?'; echo rc=$?
rc=1
$ sh -c '/bin/false; exit $?'; echo rc=$?
rc=1
$ sh -c '! false; exit $?'; echo rc=$?
rc=0
$ sh -c '! /bin/false; exit $?'; echo rc=$?
rc=0


-- 
ldv

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