( exit 1 )
echo $?
Subshells always return 0.
This isn’t right is it ?
–
Using M2, Opera’s revolutionary e-mail client: http://www.opera.com/m2/
( exit 1 )
echo $?
Subshells always return 0.
This isn’t right is it ?
–
Using M2, Opera’s revolutionary e-mail client: http://www.opera.com/m2/
Simon Casady wrote:
( exit 1 )
echo $?
Subshells always return 0.
This isn’t right is it ?
#!/bin/sh
( exit 1 )
Then run:
#./myshell.sh
1
Seems to work for me.
Even if you do:
1
2
Works here too…
–
Cheers,
Adam
With a PC, I always felt limited by the software available.
On Unix, I am limited only by my knowledge.
–Peter J. Schoenster <pschon@baste.magibox.net>
On Wed, 06 Apr 2005 13:28:03 -0400, Adam Mallory <amallory@qnx.com> wrote:
Simon Casady wrote:
( exit 1 )
echo $?
Subshells always return 0.
This isn’t right is it ?
#!/bin/sh
( exit 1 )
Then run:
#./myshell.shecho $?
1
Seems to work for me.
Even if you do:
sh
exit 1
echo $?
1
sh
exit 2
echo $?
2
Works here too…
If you use () to group commands $? seems to always return 0
I bring this up because configure (shudder) always does this.
–
Using M2, Opera’s revolutionary e-mail client: http://www.opera.com/m2/
Simon Casady wrote:
If you use () to group commands $? seems to always return 0
I bring this up because configure (shudder) always does this.
On the command line:
ls: No such file or directory (FILETHATDOESNOTEXIST)
1
Seems to still work. If you group commands where the last one passes,
then sure it will return 0:
ls: No such file or directory (FILETHATDOESNOTEXIST)
Foo
0
Do you have a shell script example that shows the issue - I think we’re
missing something in the communications here.
BTW, I get the same behaviour under FreeBSD and Neutrino.
–
Cheers,
Adam
With a PC, I always felt limited by the software available.
On Unix, I am limited only by my knowledge.
–Peter J. Schoenster <pschon@baste.magibox.net>
Adam Mallory <amallory@qnx.com> wrote:
Simon Casady wrote:
If you use () to group commands $? seems to always return 0
I bring this up because configure (shudder) always does this.On the command line:
sh
(ls FILETHATDOESNOTEXIST)
ls: No such file or directory (FILETHATDOESNOTEXIST)
echo $?
1
Seems to still work. If you group commands where the last one passes,
then sure it will return 0:sh
(ls FILETHATDOESNOTEXIST; echo “Foo”)
ls: No such file or directory (FILETHATDOESNOTEXIST)
Fooecho $?
0
Do you have a shell script example that shows the issue - I think we’re
missing something in the communications here.
BTW, I get the same behaviour under FreeBSD and Neutrino.
I get the zero:
[1@ttyp1] which -al sh
-rwxrwxr-x 1 root root 103248 Jul 20 1998 /bin/sh
[1@ttyp1] cksum /bin/sh
3711776061 103248 /bin/sh
[1@ttyp1] /bin/sh
[1@ttyp1] (exit 1)
[1@ttyp1] echo $?
0
[1@ttyp1] uname -a
QNX 1 L 425 PCI 32
[1@ttyp1] sin in
Node CPU Machine Speed Memory Ticksize Display Flags
1 686/687 PCI 19117 330M/392M 10.0ms VGA Color -3P±---------8P
Heapp Heapf Heapl Heapn Hands Names Sessions Procs Timers Nodes Virtual
0 0 22120 0 64 100 64 500 125 401 269M/ 411M
Boot from Hard at Feb 06 16:41 Locators: 1
Cheers,
-RK
Adam Mallory wrote:
Do you have a shell script example that shows the issue - I think we’re
missing something in the communications here.
BTW, I get the same behaviour under FreeBSD and Neutrino.
Sorry! - I’m using a newer version of ksh on my qnx4 box. My release
system shows that same issue. Looks like it’s not propagating the $?
through properly.
Go grab ftp://ftp.qnx.com/usr/free/qnx4/os/shells/pdksh-5.2.3-bin.tgz
and that should address that issue (it seems to ).
–
Cheers,
Adam
With a PC, I always felt limited by the software available.
On Unix, I am limited only by my knowledge.
–Peter J. Schoenster <pschon@baste.magibox.net>
On Wed, 06 Apr 2005 16:07:04 -0400, Adam Mallory <amallory@qnx.com> wrote:
done, thanks
Adam Mallory wrote:
Do you have a shell script example that shows the issue - I think we’re
missing something in the communications here.
BTW, I get the same behaviour under FreeBSD and Neutrino.Sorry! - I’m using a newer version of ksh on my qnx4 box. My release
system shows that same issue. Looks like it’s not propagating the $?
through properly.Go grab > ftp://ftp.qnx.com/usr/free/qnx4/os/shells/pdksh-5.2.3-bin.tgz
and that should address that issue (it seems to > > ).
–
Using M2, Opera’s revolutionary e-mail client: http://www.opera.com/m2/
On Wed, 06 Apr 2005 16:07:04 -0400, Adam Mallory <amallory@qnx.com> wrote:
grab > ftp://ftp.qnx.com/usr/free/qnx4/os/shells/pdksh-5.2.3-bin.tgz
If I try pdksh v5.2.3 - I see a big difference in the behaviour:
Is pdksh v5.2.3 a decent replacement for, say, ported BASH v2.02?
Currently I use BASH when I try porting things to QNX4.
What is your version of /bin/ksh?
If the next QNX4 patch gets released - will it be included there?
Tony.