zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line

zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line

[John]

Been using zsh for a while now and loving it.  I ran into a problem today.  The following script errors out if run with zsh as my default shell:

#!/bin/bash
v_build() {

echo "The file is $1"
}

export -f v_build
find . -maxdepth 1 -type f | parallel v_build

Output:
% ./test 
zsh:1: command not found: v_build
zsh:1: command not found: v_build
zsh:1: command not found: v_build
zsh:1: command not found: v_build

If I switch to a user who has bash as its default shell, the same script runs just fine:

$ ./test
The file is ./test
The file is ./01.jpg
The file is ./02.jpg
The file is ./03.jpg

Love to understand what I have incorrectly configured.  It seems like zsh is ignoring the shebang telling it to use /bin/bash as the shell to run the script.

Re: zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line

[Yichao Yu]

On Sat, Nov 24, 2012 at 8:07 PM, John <da_audiophile@yahoo.com> wrote:
> Been using zsh for a while now and loving it.  I ran into a problem today.  The following script errors out if run with zsh as my default shell:
>
> #!/bin/bash
> v_build() {
>
> echo "The file is $1"
> }
>
> export -f v_build
> find . -maxdepth 1 -type f | parallel v_build
>
> Output:
> % ./test
> zsh:1: command not found: v_build
> zsh:1: command not found: v_build
> zsh:1: command not found: v_build
> zsh:1: command not found: v_build

Ur main script is indeed run by bash but parallel is trying to execute
the v_build command in your default shell.... therefore it has nothing
to do with the #! line...

Not sure how to solve this problem though....

>
> If I switch to a user who has bash as its default shell, the same script runs just fine:
>
> $ ./test
> The file is ./test
> The file is ./01.jpg
> The file is ./02.jpg
> The file is ./03.jpg
>
> Love to understand what I have incorrectly configured.  It seems like zsh is ignoring the shebang telling it to use /bin/bash as the shell to run the script.

Re: zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line

[John]

> Ur main script is indeed run by bash but parallel is trying to execute

> the v_build command in your default shell.... therefore it has nothing
> to do with the #! line...
> 
> Not sure how to solve this problem though....


You are right.  I have been combing through the man page looking for a switch to override the default shell but haven't found one.  Feature request?

Re: zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line

[Bart Schaefer]

On Nov 24,  8:22pm, John wrote:
} Subject: Re: zsh will not run scripts as /bin/bash even with #!/bin/bash a
}
} > Ur main script is indeed run by bash but parallel is trying to execute
} > the v_build command in your default shell.... therefore it has nothing
} > to do with the #! line...
}
} You are right. I have been combing through the man page looking for a
} switch to override the default shell but haven't found one.

Try

    find . -maxdepth 1 -type f | SHELL=/bin/bash parallel v_build

Re: zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line

[John]

----- Original Message -----

> From: Bart Schaefer <schaefer@brasslantern.com>
> To: "zsh-users@zsh.org" <zsh-users@zsh.org>
> Cc: 
> Sent: Sunday, November 25, 2012 12:05 AM
> Subject: Re: zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line
> Try
> 
>     find . -maxdepth 1 -type f | SHELL=/bin/bash parallel v_build
> 

Brilliant!  This works great.

Re: zsh will not run scripts as /bin/bash even with #!/bin/bash as the first line

[Kurtis Rader]

[-- Attachment #1: Type: text/plain, Size: 1431 bytes --]

The shell, whether zsh or bash, does not pay any attention to the shebang
line. That is done by the operating system kernel. That is, when you
execute a shell script the OS notices that the file is a plain text file
with a "#!" signature and launches the named program to interpret its
contents.

You cannot reasonably expect exported functions to work across different
shells. Put the function in a script file and reference that as your
argument to the parallel command.

On Sat, Nov 24, 2012 at 5:07 PM, John <da_audiophile@yahoo.com> wrote:

> Been using zsh for a while now and loving it.  I ran into a problem today.
>  The following script errors out if run with zsh as my default shell:
>
> #!/bin/bash
> v_build() {
>
> echo "The file is $1"
> }
>
> export -f v_build
> find . -maxdepth 1 -type f | parallel v_build
>
> Output:
> % ./test
> zsh:1: command not found: v_build
> zsh:1: command not found: v_build
> zsh:1: command not found: v_build
> zsh:1: command not found: v_build
>
> If I switch to a user who has bash as its default shell, the same script
> runs just fine:
>
> $ ./test
> The file is ./test
> The file is ./01.jpg
> The file is ./02.jpg
> The file is ./03.jpg
>
> Love to understand what I have incorrectly configured.  It seems like zsh
> is ignoring the shebang telling it to use /bin/bash as the shell to run the
> script.
>



-- 
Kurtis Rader
Caretake of the exceptional canines Junior and Chino