From: Simon Guilliams <simon.guilliams@gmail.com>
To: zsh-workers@zsh.org
Subject: Zsh - possible bug report
Date: Sun, 10 Sep 2017 15:00:28 +0200 [thread overview]
Message-ID: <CAPtQDzpP3pf7TkvG_fQt7SB5eHt5Wfo9COuk=2z7hRMSZ4pLHA@mail.gmail.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 808 bytes --]
Hello,
I have found a behavior of zsh I cannot explain. I don't know if it is a
bug and I hope this is not a duplicate.
$ cat print-argv0.c
> #include <stdio.h>
> int main(int ac, char **av)
> {
> if (ac > 0)
> fputs(av[0], stdout);
> }
> $ cc print-argv0.c
> $ zsh -f -c "exec -a '' ./a.out | hexdump -vC"
> 00000000 9b 9b |..|
> 00000002
> $ zsh -f -c "exec -a \"\" ./a.out | hexdump -vC"
> 00000000 9c 9c |..|
> 00000002
Zsh makes argv[0] hold two bytes, 0x9b9b or 0x9c9c depending on quotes or
double-quotes.
Bash does make argv[0] an empty string.
$ bash -c "exec -a '' ./a.out | hexdump -vC"
> $ bash -c "exec -a \"\" ./a.out | hexdump -vC"
> $
Why does this happen? Is this expected behavior?
Thank you
next reply other threads:[~2017-09-10 13:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-10 13:00 Simon Guilliams [this message]
2017-09-10 16:50 ` Peter Stephenson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAPtQDzpP3pf7TkvG_fQt7SB5eHt5Wfo9COuk=2z7hRMSZ4pLHA@mail.gmail.com' \
--to=simon.guilliams@gmail.com \
--cc=zsh-workers@zsh.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/zsh/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).