Unconsistent command-line parsing in case of UTF-8 quoted arguments
Tue Oct 6 21:36:07 GMT 2020
Thanks for your replies.
This issue only happens when a program is run from cmd.exe, not from a
Cygwin bash shell.
This is important for me, since I discovered this bug in a project
that must be run from Windows graphical shell (i.e. there is no
sensible way to run it through Cygwin and Bash).
> Please show us the output from "uname -a" and "locale" run from the bash prompt.
> Please provide the results of "locale" command right before running your test
Here are the more detailed steps to reproduce the issue (along with
answers to your requests about `uname`, `locale`, etc.).
(I mostly reproduced what billziss-gh had done before, I do not take
all the credits :D)
Here is an example C file
$ cat example.c
const char *GetCommandLineA(void);
int main(int argc, char *argv)
const char *s = GetCommandLineA();
for (int i = 0; argc > i; i++)
printf("%d=%s\n", i, argv[i]);
I have built it with gcc from Cygwin
$ gcc -o binary example.c
Running it from the same Cygwin bash prompt works as expected
$ uname -a
CYGWIN_NT-10.0 XPS 3.1.5(0.340/5/3) 2020-06-01 08:59 x86_64 Cygwin
# (XPS is my Windows machine name)
$ which gcc
# The following runs as expected
$ ./binary.exe "foo bar" "Jérôme"
Now, let's start a Windows shell (cmd.exe)
Note that I had to copy cygwin1.dll from my Cygwin installation
directory, otherwise binary.exe would not start.
I do not know whether there is a `locale` equivalent in Windows
command prompt, so I merely ran my program.
C:\Users\Public>binary.exe "foo bar" "Jérôme"
C=binary.exe "foo bar" "J□r□me"
This behaviour is not expected and is quite inconsistent with what
happened through Bash.
Besides the "strange squares" that appear on the first line, and the
extra space after binary.exe, I especially did not expect "Jérôme" to
remain quoted as a second argument.
Sorry for the delay in my answer. I hope this is now clear, please ask
me for more examples or investigation if you need.
Thanks for your help.
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