55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
/* sysconf.c POSIX 4.8.1
|
|
* long int sysconf(int name);
|
|
*
|
|
* POSIX allows some of the values in <limits.h> to be increased at
|
|
* run time. The sysconf() function allows such values to be checked
|
|
* at run time. MINIX does not use this facility - the run time
|
|
* limits are those given in <limits.h>.
|
|
*/
|
|
|
|
#include <lib.h>
|
|
#include <unistd.h>
|
|
#include <time.h>
|
|
|
|
PUBLIC long int sysconf(name)
|
|
int name; /* property being inspected */
|
|
{
|
|
switch(name) {
|
|
case _SC_ARG_MAX:
|
|
return (long) ARG_MAX;
|
|
|
|
case _SC_CHILD_MAX:
|
|
return (long) CHILD_MAX;
|
|
|
|
case _SC_CLK_TCK:
|
|
return (long) CLOCKS_PER_SEC;
|
|
|
|
case _SC_NGROUPS_MAX:
|
|
return (long) NGROUPS_MAX;
|
|
|
|
case _SC_OPEN_MAX:
|
|
return (long) OPEN_MAX;
|
|
|
|
case _SC_JOB_CONTROL:
|
|
return -1L; /* no job control */
|
|
|
|
case _SC_SAVED_IDS:
|
|
return -1L; /* no saved uid/gid */
|
|
|
|
case _SC_VERSION:
|
|
return (long) _POSIX_VERSION;
|
|
|
|
case _SC_STREAM_MAX:
|
|
return (long) STREAM_MAX;
|
|
|
|
case _SC_TZNAME_MAX:
|
|
return (long) TZNAME_MAX;
|
|
|
|
case _SC_PAGESIZE:
|
|
return getpagesize();
|
|
|
|
default:
|
|
errno = EINVAL;
|
|
return -1L;
|
|
}
|
|
}
|