test-PATH_MAX.c

   1 /*
   2  * POSIX allows PATH_MAX to not be defined, see
   3  * http://pubs.opengroup.org/onlinepubs/9699919799/functions/sysconf.html;
   4  * the GNU Hurd is an example of a system not having it.
   5  *
   6  * Arguably, it would be better to test sysconf(_SC_PATH_MAX),
   7  * but since the individual *.c files include "config.h" before
   8  * <limits.h>, overriding an excessive value of PATH_MAX from
   9  * "config.h" is impossible anyway, so for now, the simplest
  10  * fix is to provide a value only on systems not having any.
  11  * So far, we encountered no system defining PATH_MAX to an
  12  * impractically large value, even though POSIX explicitly
  13  * allows that.
  14  *
  15  * The real fix would be to replace all static buffers of size
  16  * PATH_MAX by dynamically allocated buffers.  But that is
  17  * somewhat intrusive because it touches several files and
  18  * because it requires changing struct mlink in mandocdb.c.
  19  * So i'm postponing that for now.
  20  */
  21
  22 #include <limits.h>
  23 #include <stdio.h>
  24
  25 int
  26 main(void)
  27 {
  28         printf("PATH_MAX is defined to be %ld\n", (long)PATH_MAX);
  29         return 0;
  30 }