/* libc/sys/linux/sysconf.c - The sysconf function */
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/* libc/sys/linux/sysconf.c - The sysconf function */
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/* Copyright 2002, Red Hat Inc. */
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/* Copyright 2002, Red Hat Inc. */
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#include <unistd.h>
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#include <unistd.h>
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#include <limits.h>
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#include <limits.h>
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#include <time.h>
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#include <time.h>
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#include <errno.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/types.h>
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long int
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long int
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sysconf (int name)
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sysconf (int name)
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{
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{
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switch (name)
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switch (name)
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{
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{
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case _SC_AIO_LISTIO_MAX:
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case _SC_AIO_LISTIO_MAX:
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#ifdef AIO_LISTIO_MAX
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#ifdef AIO_LISTIO_MAX
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return AIO_LISTIO_MAX;
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return AIO_LISTIO_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_AIO_MAX:
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case _SC_AIO_MAX:
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#ifdef AIO_MAX
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#ifdef AIO_MAX
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return AIO_MAX;
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return AIO_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_AIO_PRIO_DELTA_MAX:
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case _SC_AIO_PRIO_DELTA_MAX:
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#ifdef AIO_PRIO_DELTA_MAX
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#ifdef AIO_PRIO_DELTA_MAX
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return AIO_PRIO_DELTA_MAX;
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return AIO_PRIO_DELTA_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_ARG_MAX:
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case _SC_ARG_MAX:
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#ifdef ARG_MAX
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#ifdef ARG_MAX
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return ARG_MAX;
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return ARG_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_CHILD_MAX:
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case _SC_CHILD_MAX:
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#ifdef CHILD_MAX
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#ifdef CHILD_MAX
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return CHILD_MAX;
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return CHILD_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_CLK_TCK:
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case _SC_CLK_TCK:
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return CLK_TCK;
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return CLK_TCK;
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case _SC_DELAYTIMER_MAX:
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case _SC_DELAYTIMER_MAX:
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#ifdef DELAYTIMER_MAX
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#ifdef DELAYTIMER_MAX
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return DELAYTIMER_MAX;
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return DELAYTIMER_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_GETGR_R_SIZE_MAX:
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case _SC_GETGR_R_SIZE_MAX:
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#ifdef _GETGR_R_SIZE_MAX
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#ifdef _GETGR_R_SIZE_MAX
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return _GETGR_R_SIZE_MAX;
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return _GETGR_R_SIZE_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_GETPW_R_SIZE_MAX:
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case _SC_GETPW_R_SIZE_MAX:
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#ifdef _GETPW_R_SIZE_MAX
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#ifdef _GETPW_R_SIZE_MAX
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return _GETPW_R_SIZE_MAX;
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return _GETPW_R_SIZE_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_LOGIN_NAME_MAX:
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case _SC_LOGIN_NAME_MAX:
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#ifdef LOGIN_NAME_MAX
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#ifdef LOGIN_NAME_MAX
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return LOGIN_NAME_MAX;
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return LOGIN_NAME_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_MQ_OPEN_MAX:
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case _SC_MQ_OPEN_MAX:
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#ifdef MQ_OPEN_MAX
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#ifdef MQ_OPEN_MAX
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return MQ_OPEN_MAX;
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return MQ_OPEN_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_MQ_PRIO_MAX:
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case _SC_MQ_PRIO_MAX:
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#ifdef MQ_PRIO_MAX
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#ifdef MQ_PRIO_MAX
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return MQ_PRIO_MAX;
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return MQ_PRIO_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_NGROUPS_MAX:
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case _SC_NGROUPS_MAX:
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#ifdef NGROUPS_MAX
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#ifdef NGROUPS_MAX
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return NGROUPS_MAX;
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return NGROUPS_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_OPEN_MAX:
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case _SC_OPEN_MAX:
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#ifdef OPEN_MAX
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#ifdef OPEN_MAX
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return OPEN_MAX;
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return OPEN_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_PAGESIZE:
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case _SC_PAGESIZE:
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#ifdef PAGESIZE
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#ifdef PAGESIZE
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return PAGESIZE;
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return PAGESIZE;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_RTSIG_MAX:
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case _SC_RTSIG_MAX:
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#ifdef RTSIG_MAX
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#ifdef RTSIG_MAX
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return RTSIG_MAX;
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return RTSIG_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_SEM_NSEMS_MAX:
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case _SC_SEM_NSEMS_MAX:
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#ifdef SEM_NSEMS_MAX
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#ifdef SEM_NSEMS_MAX
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return SEM_NSEMS_MAX;
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return SEM_NSEMS_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_SEM_VALUE_MAX:
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case _SC_SEM_VALUE_MAX:
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#ifdef SEM_VALUE_MAX
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#ifdef SEM_VALUE_MAX
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return SEM_VALUE_MAX;
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return SEM_VALUE_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_SIGQUEUE_MAX:
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case _SC_SIGQUEUE_MAX:
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#ifdef SIGQUEUE_MAX
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#ifdef SIGQUEUE_MAX
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return SIGQUEUE_MAX;
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return SIGQUEUE_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_STREAM_MAX:
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case _SC_STREAM_MAX:
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#ifdef STREAM_MAX
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#ifdef STREAM_MAX
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return STREAM_MAX;
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return STREAM_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_DESTRUCTOR_ITERATIONS:
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case _SC_THREAD_DESTRUCTOR_ITERATIONS:
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#ifdef PTHREAD_DESTRUCTOR_ITERATIONS
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#ifdef PTHREAD_DESTRUCTOR_ITERATIONS
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return PTHREAD_DESTRUCTOR_ITERATIONS;
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return PTHREAD_DESTRUCTOR_ITERATIONS;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_KEYS_MAX:
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case _SC_THREAD_KEYS_MAX:
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#ifdef PTHREAD_KEYS_MAX
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#ifdef PTHREAD_KEYS_MAX
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return PTHREAD_KEYS_MAX;
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return PTHREAD_KEYS_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_STACK_MIN:
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case _SC_THREAD_STACK_MIN:
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#ifdef PTHREAD_STACK_MIN
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#ifdef PTHREAD_STACK_MIN
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return PTHREAD_STACK_MIN;
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return PTHREAD_STACK_MIN;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_THREADS_MAX:
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case _SC_THREAD_THREADS_MAX:
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#ifdef PTHREAD_THREADS_MAX
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#ifdef PTHREAD_THREADS_MAX
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return PTHREAD_THREADS_MAX;
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return PTHREAD_THREADS_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_TIMER_MAX:
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case _SC_TIMER_MAX:
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#ifdef TIMER_MAX
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#ifdef TIMER_MAX
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return TIMER_MAX;
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return TIMER_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_TTY_NAME_MAX:
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case _SC_TTY_NAME_MAX:
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#ifdef TTY_NAME_MAX
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#ifdef TTY_NAME_MAX
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return TTY_NAME_MAX;
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return TTY_NAME_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_TZNAME_MAX:
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case _SC_TZNAME_MAX:
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#ifdef TZNAME_MAX
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#ifdef TZNAME_MAX
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return TZNAME_MAX;
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return TZNAME_MAX;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_ASYNCHRONOUS_IO:
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case _SC_ASYNCHRONOUS_IO:
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#ifdef _POSIX_ASYNCHRONOUS_IO
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#ifdef _POSIX_ASYNCHRONOUS_IO
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_FSYNC:
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case _SC_FSYNC:
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#ifdef _POSIX_FSYNC
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#ifdef _POSIX_FSYNC
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_JOB_CONTROL:
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case _SC_JOB_CONTROL:
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#ifdef _POSIX_JOB_CONTROL
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#ifdef _POSIX_JOB_CONTROL
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_MAPPED_FILES:
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case _SC_MAPPED_FILES:
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#ifdef _POSIX_MAPPED_FILES
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#ifdef _POSIX_MAPPED_FILES
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_MEMLOCK:
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case _SC_MEMLOCK:
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#ifdef _POSIX_MEMLOCK
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#ifdef _POSIX_MEMLOCK
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_MEMLOCK_RANGE:
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case _SC_MEMLOCK_RANGE:
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#ifdef _POSIX_MEMLOCK_RANGE
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#ifdef _POSIX_MEMLOCK_RANGE
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return _POSIX_MEMLOCK_RANGE;
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return _POSIX_MEMLOCK_RANGE;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_MEMORY_PROTECTION:
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case _SC_MEMORY_PROTECTION:
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#ifdef _POSIX_MEMORY_PROTECTION
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#ifdef _POSIX_MEMORY_PROTECTION
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_MESSAGE_PASSING:
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case _SC_MESSAGE_PASSING:
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#ifdef _POSIX_MESSAGE_PASSING
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#ifdef _POSIX_MESSAGE_PASSING
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_PRIORITIZED_IO:
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case _SC_PRIORITIZED_IO:
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#ifdef _POSIX_PRIORITIZED_IO
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#ifdef _POSIX_PRIORITIZED_IO
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_PRIORITY_SCHEDULING:
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case _SC_PRIORITY_SCHEDULING:
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#ifdef _POSIX_PRIORITY_SCHEDULING
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#ifdef _POSIX_PRIORITY_SCHEDULING
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_REALTIME_SIGNALS:
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case _SC_REALTIME_SIGNALS:
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#ifdef _POSIX_REALTIME_SIGNALS
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#ifdef _POSIX_REALTIME_SIGNALS
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_SAVED_IDS:
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case _SC_SAVED_IDS:
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#ifdef _POSIX_SAVED_IDS
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#ifdef _POSIX_SAVED_IDS
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_SEMAPHORES:
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case _SC_SEMAPHORES:
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#ifdef _POSIX_SEMAPHORES
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#ifdef _POSIX_SEMAPHORES
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_SHARED_MEMORY_OBJECTS:
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case _SC_SHARED_MEMORY_OBJECTS:
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#ifdef _POSIX_SHARED_MEMORY_OBJECTS
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#ifdef _POSIX_SHARED_MEMORY_OBJECTS
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_SYNCHRONIZED_IO:
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case _SC_SYNCHRONIZED_IO:
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#ifdef _POSIX_SYNCHRONIZED_IO
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#ifdef _POSIX_SYNCHRONIZED_IO
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_TIMERS:
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case _SC_TIMERS:
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#ifdef _POSIX_TIMERS
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#ifdef _POSIX_TIMERS
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREADS:
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case _SC_THREADS:
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#ifdef _POSIX_THREADS
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#ifdef _POSIX_THREADS
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_ATTR_STACKADDR:
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case _SC_THREAD_ATTR_STACKADDR:
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#ifdef _POSIX_THREAD_ATTR_STACKADDR
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#ifdef _POSIX_THREAD_ATTR_STACKADDR
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_ATTR_STACKSIZE:
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case _SC_THREAD_ATTR_STACKSIZE:
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#ifdef _POSIX_THREAD_ATTR_STACKSIZE
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#ifdef _POSIX_THREAD_ATTR_STACKSIZE
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_PRIORITY_SCHEDULING:
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case _SC_THREAD_PRIORITY_SCHEDULING:
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#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
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#ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_PRIO_INHERIT:
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case _SC_THREAD_PRIO_INHERIT:
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#ifdef _POSIX_THREAD_PRIO_INHERIT
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#ifdef _POSIX_THREAD_PRIO_INHERIT
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_PRIO_PROTECT:
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case _SC_THREAD_PRIO_PROTECT:
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#ifdef _POSIX_THREAD_PRIO_PROTECT
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#ifdef _POSIX_THREAD_PRIO_PROTECT
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_PROCESS_SHARED:
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case _SC_THREAD_PROCESS_SHARED:
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#ifdef _POSIX_THREAD_PROCESS_SHARED
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#ifdef _POSIX_THREAD_PROCESS_SHARED
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_THREAD_SAFE_FUNCTIONS:
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case _SC_THREAD_SAFE_FUNCTIONS:
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#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
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#ifdef _POSIX_THREAD_SAFE_FUNCTIONS
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return 1;
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return 1;
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#else
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#else
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return -1;
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return -1;
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#endif
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#endif
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case _SC_VERSION:
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case _SC_VERSION:
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#ifdef _POSIX_VERSION
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#ifdef _POSIX_VERSION
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return _POSIX_VERSION;
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return _POSIX_VERSION;
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#else
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#else
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return -1;
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return -1;
|
#endif
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#endif
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default:
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default:
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errno = EINVAL;
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errno = EINVAL;
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return -1;
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return -1;
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}
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}
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return -1; /* can't get here */
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return -1; /* can't get here */
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}
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}
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