Types and Constants

Types and constants exported by the Illumos module.

Module: Illumos

Standard File Descriptors

Name	Type	Value	Description
Stdin	int32	0	Standard input.
Stdout	int32	1	Standard output.
Stderr	int32	2	Standard error.

These are conventional descriptor numbers. A process may close or redirect them, so the corresponding descriptor is not guaranteed to remain open.

Syscall Numbers

Name	Type	Value
SYS_EXIT	uint64	1
SYS_READ	uint64	3
SYS_WRITE	uint64	4
SYS_CLOSE	uint64	6
SYS_BRK	uint64	17
SYS_GETPID	uint64	20
SYS_MMAP	uint64	115
SYS_MUNMAP	uint64	117
SYS_CLOCK_GETTIME	uint64	191
SYS_NANOSLEEP	uint64	199

These values are valid for the Illumos x86-64 syscall ABI only.

Memory Protection

Name	Type	Value	Description
PROT_READ	int32	1	Pages may be read.
PROT_WRITE	int32	2	Pages may be written.
PROT_EXEC	int32	4	Pages may be executed.

Combine protection values with bitwise OR.

Mapping Flags

Name	Type	Value	Description
MAP_PRIVATE	int32	2	Create a private copy-on-write mapping.
MAP_ANONYMOUS	int32	256	Create a mapping not backed by a file.

Clock IDs

Name	Type	Value	Description
CLOCK_REALTIME	int32	3	Adjustable wall-clock time.
CLOCK_MONOTONIC	int32	4	Monotonic time for interval measurement.

Timespec

struct Timespec {
    tv_sec:  int64;
    tv_nsec: int64;
}

Field	Type	Description
tv_sec	int64	Whole seconds.
tv_nsec	int64	Nanoseconds within the second, normally 0-999,999,999.

ClockGetTime writes a clock value into this structure. Nanosleep accepts opaque pointers; pass a pointer to Timespec for its requested and remaining intervals.

See also

• Mmap - use protection and mapping flags
• Time - use clock IDs and Timespec
• Raw syscalls - use syscall numbers directly