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From: vallor <vallor@cultnix.org>
Newsgroups: comp.os.linux.advocacy
Subject: Fine, let's see you using pathconf(3) on Windows (was: Re: Then
 there's PATH_MAX)
Date: 10 Dec 2024 13:58:17 GMT
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On Tue, 10 Dec 2024 13:12:03 +0000, Farley Flud <fsquared@fsquared.linux>
wrote in <180fd2f32d5884e5$6049$1734$802601b3@news.usenetexpress.com>:

> On Mon, 09 Dec 2024 06:09:40 +0000, vallor wrote:
> 
> 
>> #include <stdio.h> #include <limits.h>
>> 
>> #ifdef __linux__ #include <linux/limits.h>
>> #endif
>> 
>> int main (void)
>> {
>> 
>> printf("%d\n",PATH_MAX);
>> 
>> return 0;
>> }
>> 
>> 
> This is bullshit.
> 
> PATH_MAX is filesystem dependent and since GNU/Linux, unlike that pile
> of garbage Microslop, supports many, many different filesystems the
> PATH_MAX macro is unreliable and may be undefined on some machines.
> 
> The best and only way to determine file name/path parameters is to use
> "pathconf" of "fpathconf:"
> 
> https://pubs.opengroup.org/onlinepubs/9799919799/
> 
> From the link:
> 
> "The pathconf() function was proposed immediately after the sysconf()
> function when it was realized that some configurable values may differ
> across file system, directory, or device boundaries."

Of course, "Flud" (after morphing -- AGAIN) couldn't be
bothered to provide a program that builds on both Linux and Windows
to demonstrate.

(I doubt Windows has pathconf(), but would love to be proved wrong.  I
downloaded the tcc winapi headers, and I don't see it in there...)

 - - cut here %<- - -
#include <stdio.h>
#include <unistd.h>
#include <errno.h>

int main(int argc, char * argv[], char * envp[])
{
int result = 0;
char * path;

if(argv[1])
    {
    path = argv[1];
    }
    else
    {
    path = "/";
    }

errno = 0;
result = pathconf(path,_PC_PATH_MAX);
if(result == -1)
    {
    perror("pathconf() returned -1:");
    return 1;
    }
printf("%d\n",result);

return 0;
}
 - - cut here %<- - -

-- 
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