Why exception from os.path.exists()?

[Peter J. Holzer]

On 2018-06-07 12:47:15 +0000, Steven D'Aprano wrote:
> But it doesn't do that. "Pathnames cannot contain NUL" is a falsehood 
> that programmers wrongly believe about paths. HFS Plus and Apple File 
> System support NULs in paths.
[...]
> But in the spirit of compromise, okay, let's ignore the existence of file 
> systems like HFS which allow NUL. Apart from Mac users, who uses them 
> anyway? Let's pretend that every file system in existence, now and into 
> the future, will prohibit NULs in paths.

Could you (or anybody else who owns a Mac) please do the following:

* Create an empty directory
* In this directory, create two files:
  * One with an embedded \0 in the file name
  * One with an embedded / in the file name
* Compile and run this C program in the directory and post the output:

    #include <stdio.h>
    #include <sys/types.h>
    #include <dirent.h>

    int main(void) {
        DIR *dp;
        struct dirent *de;
        char *p;

        dp = opendir(".");
        while ((de = readdir(dp)) != NULL) {
            printf("%ld -", (long)de->d_ino);
            for (p = de->d_name; *p; p++) {
                printf(" %02x", (unsigned char)*p);
            }
            printf("\n");
        }
        return 0;
    }

Bonuspoints for doing this on an USB stick and then mounting the USB
stick on a Linux system and posting the output there as well.

I'm really curious how MacOS maps those characters in the POSIX API.

        hp

-- 
   _  | Peter J. Holzer    | we build much bigger, better disasters now
|_|_) |                    | because we have much more sophisticated
| |   | hjp at hjp.at         | management tools.
__/   | http://www.hjp.at/ | -- Ross Anderson <https://www.edge.org/>
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