minix/lib/other/sysconf.c

53 lines
1 KiB
C
Raw Normal View History

2005-04-21 16:53:53 +02:00
/* 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;
default:
errno = EINVAL;
return -1L;
}
}