1991-09-03 14:22:32 +00:00
|
|
|
/* POSIX fpathconf (Sec. 5.7.1) Author: Andy Tanenbaum */
|
|
|
|
|
|
|
|
|
|
#include <lib.h>
|
1991-09-19 11:26:10 +00:00
|
|
|
#include <unistd.h>
|
1991-09-03 14:22:32 +00:00
|
|
|
#include <sys/types.h>
|
|
|
|
|
#define fstat _fstat
|
|
|
|
|
#include <sys/stat.h>
|
|
|
|
|
#include <errno.h>
|
|
|
|
|
#include <limits.h>
|
|
|
|
|
|
|
|
|
|
PUBLIC long fpathconf(fd, name)
|
|
|
|
|
int fd; /* file descriptor being interrogated */
|
|
|
|
|
int name; /* property being inspected */
|
|
|
|
|
{
|
|
|
|
|
/* POSIX allows some of the values in <limits.h> to be increased at
|
|
|
|
|
* run time. The pathconf and fpathconf functions allow these values
|
|
|
|
|
* to be checked at run time. MINIX does not use this facility.
|
|
|
|
|
* The run-time limits are those given in <limits.h>.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
struct stat stbuf;
|
|
|
|
|
|
|
|
|
|
switch(name) {
|
|
|
|
|
case _PC_LINK_MAX:
|
|
|
|
|
/* Fstat the file. If that fails, return -1. */
|
|
|
|
|
if (fstat(fd, &stbuf) != 0) return(-1L);
|
|
|
|
|
if (S_ISDIR(stbuf.st_mode))
|
|
|
|
|
return(1L); /* no links to directories */
|
|
|
|
|
else
|
|
|
|
|
return( (long) LINK_MAX);
|
|
|
|
|
|
|
|
|
|
case _PC_MAX_CANON:
|
|
|
|
|
return( (long) MAX_CANON);
|
|
|
|
|
|
|
|
|
|
case _PC_MAX_INPUT:
|
|
|
|
|
return( (long) MAX_INPUT);
|
|
|
|
|
|
|
|
|
|
case _PC_NAME_MAX:
|
|
|
|
|
return( (long) NAME_MAX);
|
|
|
|
|
|
|
|
|
|
case _PC_PATH_MAX:
|
|
|
|
|
return( (long) PATH_MAX);
|
|
|
|
|
|
|
|
|
|
case _PC_PIPE_BUF:
|
|
|
|
|
return( (long) PIPE_BUF);
|
|
|
|
|
|
|
|
|
|
case _PC_CHOWN_RESTRICTED:
|
|
|
|
|
return( (long) 1); /* MINIX defines CHOWN_RESTRICTED */
|
|
|
|
|
|
|
|
|
|
case _PC_NO_TRUNC: /* MINIX does not define NO_TRUNC */
|
|
|
|
|
return( (long) 0);
|
|
|
|
|
|
|
|
|
|
case _PC_VDISABLE: /* MINIX defines VDISABLE */
|
|
|
|
|
return( (long) _POSIX_VDISABLE);
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
errno = EINVAL;
|
|
|
|
|
return(-1L);
|
|
|
|
|
}
|
|
|
|
|
}
|
