lib/posix/_pathconf.c

   1 /* POSIX pathconf (Sec. 5.7.1)          Author: Andy Tanenbaum */
   2
   3 #include <lib.h>
   4 #define close           _close
   5 #define open            _open
   6 #define pathconf        _pathconf
   7 #include <fcntl.h>
   8 #include <errno.h>
   9 #include <unistd.h>
  10
  11 PUBLIC long pathconf(path, name)
  12 _CONST char *path;              /* name of file being interrogated */
  13 int name;                       /* property being inspected */
  14 {
  15 /* POSIX allows some of the values in <limits.h> to be increased at
  16  * run time.  The pathconf and fpathconf functions allow these values
  17  * to be checked at run time.  MINIX does not use this facility.
  18  * The run-time limits are those given in <limits.h>.
  19  */
  20
  21   int fd;
  22   long val;
  23
  24   if ( (fd = open(path, O_RDONLY)) < 0) return(-1L);
  25   val = fpathconf(fd, name);
  26   close(fd);
  27   return(val);
  28 }