IP v4
IP v6
Unix
Unspecified
The application expects that it will not access the specified data in the near future.
The application expects to access the specified data once and then not reuse it thereafter.
The application has no advice to give on its behavior with respect to the specified data.
The application expects to access the specified data in a random order.
The application expects to access the specified data sequentially from lower offsets to higher offsets.
The application expects to access the specified data in the near future.
The store-wide monotonic clock, which is defined as a clock measuring
real time, whose value cannot be adjusted and which cannot have negative
clock jumps. The epoch of this clock is undefined. The absolute time
value of this clock therefore has no meaning.
The CPU-time clock associated with the current process.
The clock measuring real time. Time value zero corresponds with
1970-01-01T00:00:00Z.
The CPU-time clock associated with the current thread.
Special Dircookie value indicating the start of a directory.
Add an entry to the interest list of the epoll file descriptor, epfd.
Remove (deregister) the target file descriptor fd from the interest list.
Change the settings associated with fd in the interest list to the new settings specified in event.
Argument list too long.
Permission denied.
Address in use.
Address not available.
Address family not supported.
Resource unavailable, or operation would block.
Connection already in progress.
Bad file descriptor.
Bad message.
Device or resource busy.
Operation canceled.
No child processes.
Connection aborted.
Connection refused.
Connection reset.
Resource deadlock would occur.
Destination address required.
Mathematics argument out of domain of function.
Reserved.
File exists.
Bad address.
File too large.
Host is unreachable.
Identifier removed.
Illegal byte sequence.
Operation in progress.
Interrupted function.
Invalid argument.
I/O error.
Socket is connected.
Is a directory.
Too many levels of symbolic links.
Memory access violation.
File descriptor value too large.
Too many links.
Message too large.
Reserved.
Filename too long.
Network is down.
Connection aborted by network.
Network unreachable.
Too many files open in system.
No buffer space available.
No such device.
No such file or directory.
Executable file format error.
No locks available.
Reserved.
Not enough space.
No message of the desired type.
Protocol not available.
No space left on device.
Function not supported.
Extension: Capabilities insufficient.
The socket is not connected.
Not a directory or a symbolic link to a directory.
Directory not empty.
State not recoverable.
Not a socket.
Not supported, or operation not supported on socket.
Inappropriate I/O control operation.
No such device or address.
Value too large to be stored in data type.
Previous owner died.
Pending asynchronous wake.
Operation not permitted.
Broken pipe.
Protocol error.
Protocol not supported.
Protocol wrong type for socket.
Result too large.
Read-only file system.
Cannot send after socket shutdown.
Invalid seek.
No such process.
Reserved.
No error occurred. System call completed successfully.
Connection timed out.
Text file busy.
Unknown error has occurred.
Cross-device link.
Indicates if this event file description will run as a semaphore
The peer of this socket has closed or disconnected.
The time value of clock subscription_clock::id has
reached timestamp subscription_clock::timeout.
File descriptor subscription_fd_readwrite::file_descriptor has data
available for reading. This event always triggers for regular files.
File descriptor subscription_fd_readwrite::file_descriptor has capacity
available for writing. This event always triggers for regular files.
Append mode: Data written to the file is always appended to the file’s end.
Write according to synchronized I/O data integrity completion. Only the data stored in the file is synchronized.
Non-blocking mode.
Synchronized read I/O operations.
Write according to synchronized I/O file integrity completion. In
addition to synchronizing the data stored in the file, the implementation
may also synchronously update the file’s metadata.
The “standard error” descriptor number.
The “standard input” descriptor number.
The “standard output” descriptor number.
The file descriptor or file refers to a block device inode.
The file descriptor or file refers to a character device inode.
The file descriptor or file refers to a directory inode.
The file descriptor or file refers to a regular file inode.
The file descriptor or file refers to a datagram socket.
The file descriptor or file refers to a raw socket.
The file descriptor or file refers to a sequential packet socket.
The file descriptor or file refers to a byte-stream socket.
The file refers to a symbolic link inode.
The type of the file descriptor or file is unknown or is different from any of the other types specified.
Adjust the last data access timestamp to the value stored in filestat::atim.
Adjust the last data access timestamp to the time of clock clockid::realtime.
Adjust the last data modification timestamp to the value stored in filestat::mtim.
Adjust the last data modification timestamp to the time of clock clockid::realtime.
Non-blocking join on the process
Return if a process is stopped
The process has exited by a normal exit code
The process was terminated by a signal
Nothing has happened
The process was stopped by a signal and can be resumed with SIGCONT
As long as the resolved path corresponds to a symbolic link, it is expanded.
Create file if it does not exist.
Fail if not a directory.
Fail if file already exists.
Truncate file to size 0.
A pre-opened directory.
Indicates if the packet should be truncated to the buffer size
Returns the message without removing it from the socket’s receive queue.
On byte-stream sockets, block until the full amount of data can be returned.
The right to invoke fd_advise.
The right to invoke fd_allocate.
The right to invoke fd_datasync.
If path_open is set, includes the right to invoke
path_open with fdflags::dsync.
The right to invoke fd_fdstat_set_flags.
The right to invoke fd_filestat_get.
The right to invoke fd_filestat_set_size.
The right to invoke fd_filestat_set_times.
The right to invoke fd_read and sock_recv.
If rights::fd_seek is set, includes the right to invoke fd_pread.
The right to invoke fd_readdir.
The right to invoke fd_seek. This flag implies rights::fd_tell.
The right to invoke fd_sync.
If path_open is set, includes the right to invoke
path_open with fdflags::rsync and fdflags::dsync.
The right to invoke fd_seek in such a way that the file offset
remains unaltered (i.e., whence::cur with offset zero), or to
invoke fd_tell.
The right to invoke fd_write and sock_send.
If rights::fd_seek is set, includes the right to invoke fd_pwrite.
The right to invoke path_create_directory.
If path_open is set, the right to invoke path_open with oflags::creat.
The right to invoke path_filestat_get.
The right to change a file’s size (there is no path_filestat_set_size).
If path_open is set, includes the right to invoke path_open with oflags::trunc.
The right to invoke path_filestat_set_times.
The right to invoke path_link with the file descriptor as the
source directory.
The right to invoke path_link with the file descriptor as the
target directory.
The right to invoke path_open.
The right to invoke path_readlink.
The right to invoke path_remove_directory.
The right to invoke path_rename with the file descriptor as the source directory.
The right to invoke path_rename with the file descriptor as the target directory.
The right to invoke path_symlink.
The right to invoke path_unlink_file.
If rights::fd_read is set, includes the right to invoke poll_oneoff to subscribe to eventtype::fd_read.
If rights::fd_write is set, includes the right to invoke poll_oneoff to subscribe to eventtype::fd_write.
Accept incoming connection
Retrieve locally bound address on a socket
Retrieve remote address on a socket
Bind an address to a socket
Connect to an address
Listen for incoming connection on an address
Receive data on a socket
Receive datagram on a socket
Send data on a socket
Send datagram on a socket
The right to invoke sock_shutdown.
Returned by sock_recv: Message data has been truncated.
Disables further receive operations.
Disables further send operations.
Process abort signal.
Action: Terminates the process.
Alarm clock.
Action: Terminates the process.
Access to an undefined portion of a memory object.
Action: Terminates the process.
Child process terminated, stopped, or continued.
Action: Ignored.
Continue executing, if stopped.
Action: Continues executing, if stopped.
Erroneous arithmetic operation.
Action: Terminates the process.
Hangup.
Action: Terminates the process.
Illegal instruction.
Action: Terminates the process.
Terminate interrupt signal.
Action: Terminates the process.
Kill.
Action: Terminates the process.
No signal. Note that POSIX has special semantics for kill(pid, 0),
so this value is reserved.
Write on a pipe with no one to read it.
Action: Ignored.
I/O possible.
Action: Terminates the process.
Profiling timer expired.
Action: Terminates the process.
Power failure.
Action: Terminates the process.
Terminal quit signal.
Action: Terminates the process.
Invalid memory reference.
Action: Terminates the process.
Stkflt
Action: Ignored.
Stop executing.
Action: Stops executing.
Bad system call.
Action: Terminates the process.
Termination signal.
Action: Terminates the process.
Trace/breakpoint trap.
Action: Terminates the process.
Terminal stop signal.
Action: Stops executing.
Background process attempting read.
Action: Stops executing.
Background process attempting write.
Action: Stops executing.
High bandwidth data is available at a socket.
Action: Ignored.
User-defined signal 1.
Action: Terminates the process.
User-defined signal 2.
Action: Terminates the process.
Virtual timer expired.
Action: Terminates the process.
Window changed.
Action: Ignored.
CPU time limit exceeded.
Action: Terminates the process.
File size limit exceeded.
Action: Terminates the process.
Accept timeout
Broadcast
Connect timeout
Dont route
Keep alive
Last error
Linger time
Socket is listening
Multicast Loop IPv4
Multicast Loop IPv6
Multicast TTL for IPv4
Socket option that does nothing
No delay
Only accept IPv6
Out-of-band inline
Promiscuous
Protocol of the socket
Receive buffer size
Receive lowat
Receive timeout
Reuse Address
Reuse Port
Send buffer size
Send lowat
Send timeout
TTL of packets
Type of socket
The socket has closed
The socket has failed
The socket has fully opened
The socket is still opening
The file descriptor or file refers to a datagram socket.
The file descriptor or file refers to a raw socket.
The file descriptor or file refers to a sequential packet socket.
The file descriptor or file refers to a byte-stream socket.
Unused enum variant to prevent $socket_dgram value of 0, which
conflicts with a macro defined in cpython which is used in a case arm
of a switch statement alongside C macros generated from this enum.
ref: https://github.com/python/cpython/blob/2f369cafeeb4a4886b00396abd8a5f33e555e1c3/Modules/getaddrinfo.c#L68
ref: https://github.com/python/cpython/blob/3f369cafeeb4a4886b00396abd8a5f33e555e1c3/Modules/getaddrinfo.c#L355-L368
The stdio will inherit from its parent
The stdio will be written to the log file
The stdio will be dumped to null
The stdio will be piped
Any encryption
Classic encryption
Double encryption
Unencrypted
If set, treat the timestamp provided in
subscription_clock::timeout as an absolute timestamp of clock
subscription_clock::id. If clear, treat the timestamp
provided in subscription_clock::timeout relative to the
current time value of clock subscription_clock::id.
dlerror_flag
tsd_used
Seek relative to current position.
Seek relative to end-of-file.
Seek relative to start-of-file.
Read command-line argument data.
The size of the array should match that returned by args_sizes_get.
Each argument is expected to be \0 terminated.
Return command-line argument data sizes.
Registers a callback function for signals
Sets the current working directory
Return the resolution of a clock.
Implementations are required to provide a non-zero value for supported clocks. For unsupported clocks,
return errno::inval.
Note: This is similar to clock_getres in POSIX.
Return the time value of a clock.
Note: This is similar to clock_gettime in POSIX.
Sets the time value of a clock.
Note: This is similar to clock_settime in POSIX.
Read environment variable data.
The sizes of the buffers should match that returned by environ_sizes_get.
Key/value pairs are expected to be joined with =s, and terminated with \0s.
Return environment variable data sizes.
Create an epoll interest list
Modifies an epoll interest list
wait for an I/O event on an epoll file descriptor
Provide file advisory information on a file descriptor.
Note: This is similar to posix_fadvise in POSIX.
Force the allocation of space in a file.
Note: This is similar to posix_fallocate in POSIX.
Close a file descriptor.
Note: This is similar to close in POSIX.
Synchronize the data of a file to disk.
Note: This is similar to fdatasync in POSIX.
Atomically duplicate a file handle.
Creates a file handle for event notifications
Get the attributes of a file descriptor.
Note: This returns similar flags to fsync(fd, F_GETFL) in POSIX, as well as additional fields.
Adjust the flags associated with a file descriptor.
Note: This is similar to fcntl(fd, F_SETFL, flags) in POSIX.
Adjust the rights associated with a file descriptor.
This can only be used to remove rights, and returns errno::notcapable if called in a way that would attempt to add rights
Return the attributes of an open file.
Adjust the size of an open file. If this increases the file’s size, the extra bytes are filled with zeros.
Note: This is similar to ftruncate in POSIX.
Adjust the timestamps of an open file or directory.
Note: This is similar to futimens in POSIX.
Opens a pipe with two file handles
Read from a file descriptor, without using and updating the file descriptor’s offset.
Note: This is similar to preadv in POSIX.
Return a description of the given preopened file descriptor.
Return a description of the given preopened file descriptor.
Write to a file descriptor, without using and updating the file descriptor’s offset.
Note: This is similar to pwritev in POSIX.
Read from a file descriptor.
Note: This is similar to readv in POSIX.
Read directory entries from a directory.
When successful, the contents of the output buffer consist of a sequence of
directory entries. Each directory entry consists of a dirent object,
followed by dirent::d_namlen bytes holding the name of the directory
entry.
This function fills the output buffer as much as possible, potentially
truncating the last directory entry. This allows the caller to grow its
read buffer size in case it’s too small to fit a single large directory
entry, or skip the oversized directory entry.
Atomically replace a file descriptor by renumbering another file descriptor.
Due to the strong focus on thread safety, this environment does not provide
a mechanism to duplicate or renumber a file descriptor to an arbitrary
number, like dup2(). This would be prone to race conditions, as an actual
file descriptor with the same number could be allocated by a different
thread at the same time.
This function provides a way to atomically renumber file descriptors, which
would disappear if dup2() were to be removed entirely.
Move the offset of a file descriptor.
Note: This is similar to lseek in POSIX.
Synchronize the data and metadata of a file to disk.
Note: This is similar to fsync in POSIX.
Return the current offset of a file descriptor.
Note: This is similar to lseek(fd, 0, SEEK_CUR) in POSIX.
Write to a file descriptor.
Note: This is similar to writev in POSIX.
Wait for a futex_wake operation to wake us.
Wake up one thread that’s blocked on futex_wait on this futex.
Wake up all threads that are waiting on futex_wait on this futex.
Returns the current working directory
Makes a HTTP request to a remote web resource and
returns a socket handles that are used to send and receive data
Retrieves the status of a HTTP request
Create a directory.
Note: This is similar to mkdirat in POSIX.
Return the attributes of a file or directory.
Note: This is similar to stat in POSIX.
Adjust the timestamps of a file or directory.
Note: This is similar to utimensat in POSIX.
Create a hard link.
Note: This is similar to linkat in POSIX.
Open a file or directory.
The returned file descriptor is not guaranteed to be the lowest-numbered
file descriptor not currently open; it is randomized to prevent
applications from depending on making assumptions about indexes, since this
is error-prone in multi-threaded contexts. The returned file descriptor is
guaranteed to be less than 2**31.
Note: This is similar to openat in POSIX.
Read the contents of a symbolic link.
Note: This is similar to readlinkat in POSIX.
Remove a directory.
Return errno::notempty if the directory is not empty.
Note: This is similar to unlinkat(fd, path, AT_REMOVEDIR) in POSIX.
Rename a file or directory.
Note: This is similar to renameat in POSIX.
Create a symbolic link.
Note: This is similar to symlinkat in POSIX.
Unlink a file.
Return errno::isdir if the path refers to a directory.
Note: This is similar to unlinkat(fd, path, 0) in POSIX.
Concurrently poll for the occurrence of a set of events.
Adds another static address to the local port
Clears all the addresses on the local port
Returns a list of all the addresses owned by the local port
Removes an address from the local port
Securely connects to a particular remote network
Acquires a set of addresses using DHCP
Adds a default gateway to the local port
Returns the MAC address of the local port
Adds a new route to the local port
Clears all the routes in the local port
Returns a list of all the routes owned by the local port
This function fills the output buffer as much as possible.
If the buffer is too small this will return EOVERFLOW and
fill nroutes with the size of the buffer needed.
Removes an existing route from the local port
Disconnects from a remote network
execve() executes the program referred to by pathname. This causes the
program that is currently being run by the calling process to be replaced
with a new program, with newly initialized stack, heap, and (initialized
and uninitialized) data segments
Terminate the process normally. An exit code of 0 indicates successful
termination of the program. The meanings of other values is dependent on
the environment.
Forks the current process into a new subprocess. If the function
returns a zero then its the new subprocess. If it returns a positive
number then its the current process and the $pid represents the child.
Returns the handle of the current process
Wait for process to exit
Returns the parent handle of a particular process
Send a signal to the process of the calling thread.
Note: This is similar to raise in POSIX.
Send a signal to the process of the calling thread on a regular basis
Note: This is similar to setitimer in POSIX.
Sends a signal to another process
Spawns a new process within the context of the parent process
(i.e. this process). It inherits the filesystem and sandbox
permissions but runs standalone.
Write high-quality random data into a buffer.
This function blocks when the implementation is unable to immediately
provide sufficient high-quality random data.
This function may execute slowly, so when large mounts of random data are
required, it’s advisable to use this function to seed a pseudo-random
number generator, rather than to provide the random data directly.
Resolves a hostname and a port to one or more IP addresses.
Temporarily yield execution of the calling thread.
Note: This is similar to sched_yield in POSIX.
Accept a new incoming connection.
Note: This is similar to accept in POSIX.
Accept a new incoming connection.
Note: This is similar to accept in POSIX.
Returns the local address to which the socket is bound.
Returns the remote address to which the socket is connected to.
Bind a socket
Note: This is similar to bind in POSIX using PF_INET
Initiate a connection on a socket to the specified address
Retrieve status of particular socket seting
Note: This is similar to getsockopt in POSIX for SO_REUSEADDR
Retrieve the size of particular option for this socket
Note: This is similar to getsockopt in POSIX for SO_RCVBUF
Retrieve one of the times on the socket
Joins a particular multicast IPv4 group
Joins a particular multicast IPv6 group
Leaves a particular multicast IPv4 group
Leaves a particular multicast IPv6 group
Listen for connections on a socket
Create an endpoint for communication.
Receive a message from a socket.
Note: This is similar to recv in POSIX, though it also supports reading
the data into multiple buffers in the manner of readv.
Receive a message and its peer address from a socket.
Note: This is similar to recvfrom in POSIX, though it also supports reading
the data into multiple buffers in the manner of readv.
Send a message on a socket.
Note: This is similar to send in POSIX, though it also supports writing
the data from multiple buffers in the manner of writev.
Sends the entire contents of a file down a socket
Send a message on a socket to a specific address.
Note: This is similar to sendto in POSIX, though it also supports writing
the data from multiple buffers in the manner of writev.
Sets a particular socket setting
Note: This is similar to setsockopt in POSIX for SO_REUSEADDR
Set size of particular option for this socket
Note: This is similar to setsockopt in POSIX for SO_RCVBUF
Sets one of the times the socket
Shut down socket send and receive channels.
Note: This is similar to shutdown in POSIX.
Returns the current status of a socket
Creates a checkpoint of the current stack which allows it to be restored
later using its stack hash. The value supplied will be returned upon
restoration (and hence must be none zero) - zero will be returned when
the stack is first recorded.
Restores the current stack to a previous stack described by supplying
stack snapshot.
Terminates the current running thread, if this is the last thread then
the process will also exit with the specified exit code. An exit code
of 0 indicates successful termination of the thread. The meanings of
other values is dependent on the environment.
Returns the index of the current thread
(threads indices are sequential from zero while the
main thread ID equals the process ID)
Joins this thread with another thread, blocking this
one until the other finishes
Returns the available parallelism which is normally the
number of available cores that can run concurrently
Sends a signal to a specific thread
Sends the current thread to sleep for a period of time
Creates a new thread by spawning that shares the same
memory address space, file handles and main event loops.
The web assembly process must export function named ‘wasi_thread_start’
Retrieves the current state of the TTY
Updates the properties of the the TTY
Connects to a websocket at a particular network URL