Here document / redirection / background process weirdness

2013-03-05 Thread Martin Jackson
Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-unknown-linux-gnu'
-DCONF_VENDOR='unknown'
-DLOCALEDIR='/home/mjackson/src/bash-4.2/_install/share/locale'
-DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib
-g -O2
uname output: Linux stagecoach 3.5.0-25-generic #39-Ubuntu SMP Mon Feb 25
18:26:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
Machine Type: x86_64-unknown-linux-gnu

Bash Version: 4.2
Patch Level: 0
Release Status: release

Description:
When executing a here document in bash, with the here document piped to
another instance of bash, where the here document contains "echo <&- &;
wait", the here document gets executed twice. I have seen this on Ubuntu
both with the current 4.2.37 from ubuntu and the latest bash tarball
(details above)

Repeat-By:
#!/home/mjackson/src/bash-4.2/_install/bin/bash

/home/mjackson/src/bash-4.2/_install/bin/bash <

Re: Here document / redirection / background process weirdness

2013-03-13 Thread Martin Jackson
I didn't see any acknowledgement of this bug report, did I fill in enough
info?

Thanks & regards,

Martin Jackson


On Tue, Mar 5, 2013 at 1:52 PM, Martin Jackson
wrote:

> Configuration Information [Automatically generated, do not change]:
> Machine: x86_64
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-unknown-linux-gnu'
> -DCONF_VENDOR='unknown'
> -DLOCALEDIR='/home/mjackson/src/bash-4.2/_install/share/locale'
> -DPACKAGE='bash' -DSHELL -DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib
> -g -O2
> uname output: Linux stagecoach 3.5.0-25-generic #39-Ubuntu SMP Mon Feb 25
> 18:26:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
> Machine Type: x86_64-unknown-linux-gnu
>
> Bash Version: 4.2
> Patch Level: 0
> Release Status: release
>
> Description:
> When executing a here document in bash, with the here document piped to
> another instance of bash, where the here document contains "echo <&- &;
> wait", the here document gets executed twice. I have seen this on Ubuntu
> both with the current 4.2.37 from ubuntu and the latest bash tarball
> (details above)
>
> Repeat-By:
> #!/home/mjackson/src/bash-4.2/_install/bin/bash
>
> /home/mjackson/src/bash-4.2/_install/bin/bash < declare -i a=0
> echo BASHPID is \$BASHPID
> true  let a++
> echo a is \$a, BASHPID is \$BASHPID
> EOF
>
> Prints:
> BASHPID is 30866
> a is 1, BASHPID is 30866
> a is 2, BASHPID is 30866
>
> Fix:
> Adding a manual 'exit' statement at the end of the here document seems
> to be a workaround:
>
> #!/home/mjackson/src/bash-4.2/_install/bin/bash
>
> /home/mjackson/src/bash-4.2/_install/bin/bash < declare -i a=0
> echo BASHPID is \$BASHPID
> true  let a++
> echo a is \$a, BASHPID is \$BASHPID
> exit
> EOF
>
> Prints:
> BASHPID is 30895
> a is 1, BASHPID is 30895
>
>