HP-UX Reference (11i v1 05/09) - 2 System Calls (vol 5)

s
sysconf(2) sysconf(2)
file (see localedef(1M))
Processor Extensions (see below)CPU_KEYBITS1 _SC_CPU_KEYBITS1
Version of CPU architecture (see below)CPU_VERSION _SC_CPU_VERSION
Maximum parenthesis nesting level for
expr expressions (see expr(1))
EXPR_NEST_MAX _SC_EXPR_NEST_MAX
Returns which kernel is supported on the
hardware. The value returned is an encod-
ing which may be interpreted using the
_SYSTEM_SUPPORTS_ILP32OS()
and
_SYSTEM_SUPPORTS_LP64OS()
mac-
ros defined in
<unistd.h> .Example:
long ret = sysconf(
_SC_HW_32_64_CAPABLE );
if ( _SYSTEM_SUPPORTS_ILP32OS(
ret)!=0){/*system
supports 32-bit OS */ }
if ( _SYSTEM_SUPPORTS_LP64OS(
ret)!=0){/*system
supports 64-bit OS */ }
HW_32_64_CAPABLE _SC_HW_32_64_CAPABLE
Type of I/O drivers the kernel supports,
currently, only the value IO_TYPE_CDIO
IO_TYPE _SC_IO_TYPE
Returns the number of bits used by the ker-
nel for pointer and long data types. Current
values include 32 and 64.
KERNEL_BITS _SC_KERNEL_BITS
The version of libc that is in use by the ap-
plication that is requesting this information.
See below for details.
LIBC_VERSION _SC_LIBC_VERSION
Maximum number of bytes in an input line
(including the newline) for POSIX.2 utilities
LINE_MAX _SC_LINE_MAX
Maximum number of simultaneous supple-
mentary group IDs per process
NGROUPS_MAX _SC_NGROUPS_MAX
Maximum number of files that one process
can have open at one time
OPEN_MAX _SC_OPEN_MAX
Kernel memory page sizePAGE_SIZE _SC_PAGE_SIZE
Maximum number of significant bytes in a
password
PASS_MAX _SC_PASS_MAX
Positive if the File Synchronization option is
supported (see fsync(2))
POSIX_FSYNC _SC_FSYNC
Positive if the system supports POSIX job
control; −1otherwise
POSIX_JOB_CONTROL _SC_JOB_CONTROL
POSIX_PRIORITY_
SCHEDULING
_SC_PRIORITY_
SCHEDULING
Positive if the system supports POSIX.4
priority scheduling; −1otherwise
Positive if the system supports POSIX.4
realtime signal extensions; −1otherwise
POSIX_REALTIME_SIGNALS _SC_REALTIME_SIGNALS
Positive if each process has a saved set-
user-ID and a saved set-group-ID; −1 other-
wise
POSIX_SAVED_IDS _SC_SAVED_IDS
HP-UX 11i Version 1: September 2005 − 2 − Hewlett-Packard Company Section 2−−419