CODEWITHSUNDEEP
cunixlinux-kernelkernellinux-mint
robert williams
robert williams

Reputation: 767

How to determine system value for _POSIX_PATH_MAX

Can anyone please tell me how to find the system value for _POSIX_PATH_MAX in Linux mint? I know that it is available in the <limits.h> file but I do not know how to find its value.

Upvotes: 6

Views: 3250

Answers (3)

alk
alk

Reputation: 70971

#define one of the following 

#define _POSIX_SOURCE
#define _POSIX_C_SOURCE 1 /* or any value larger then 1 */
#define _XOPEN_SOURCE

before #includeing <limits.h>and the compiler will see _POSIX_PATH_MAX.

You also can specify this on the command line via the compiler option -D:

gcc -c main.c -D_POSIX_C_SOURCE=1

for example.

Upvotes: 0

Verma
Verma

Reputation: 59

One more way to get it's value.

#include "stdio.h"
#include "unistd.h"
#include "limits.h"

int main()
{
    printf ("Value :: %d \n", _POSIX_PATH_MAX);
    return 0;
}

Upvotes: 1

Jens
Jens

Reputation: 72697

The tool to use, according to POSIX, is named getconf(1):

  $ getconf _POSIX_PATH_MAX
  256

Upvotes: 3

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