Then there's PATH_MAX

Try this one, DFS:

#include <stdio.h>
#include <limits.h>

#ifdef __linux__
#include <linux/limits.h>
#endif

int main (void)
{

printf("%d\n",PATH_MAX);

return 0;
}

Here, I get:

_[/nfs/ds/src/vallor/path_max]_(vallor@lm)🐧_
$ make
tcc -g -O2 -std=c90 -Wall -Werror -pedantic    query_PATH_MAX.c   -o query_PATH_MAX
_[/nfs/ds/src/vallor/path_max]_(vallor@lm)🐧_
$ ./query_PATH_MAX
4096

If you use tcc, I know the answer you'll get on Windows:

$ ./a.out
259

Ouch!  "Here's a nickel, kid..."

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   "When I was a kid, I was an imaginary playmate."