bind

Implemented in Antinomie 0.7.0 · Syscall list

Synopsis

long bind(int fd, struct sockaddr *umyaddr, int addrlen);

Number (x86-64)	49
ABI	common
Kernel entry point	sys_bind

This is the raw kernel prototype from the pinned Linux 6.12.94 schema, not the libc wrapper.

Description

Assigns a local address, such as an IP and port or a filesystem path, to a socket.

Arguments

Name	Type	Meaning
fd (arg0)	int	Socket to bind.
umyaddr (arg1)	struct sockaddr *	Pointer to the local socket address.
addrlen (arg2)	int	Size of that address.

Return value

On success: 0.

In an Antinomie trace the Return column and the ret filter field show the raw kernel return value. On failure that is the negative errno, for example -2 for ENOENT, not the -1 plus errno that the libc wrapper gives. syscall.errno holds the positive errno and syscall.success is false.

Common errors

Raw return	Name	Meaning
-13	EACCES	Permission denied.
-98	EADDRINUSE	The address is already in use.
-22	EINVAL	An argument is invalid.

Man page

bind(2) on man7.org

Captured by Antinomie

Coverage mark: Implemented. Every pointer argument has a capture rule in the pinned kernel patch and none of them records a “no decoder”, “address only” or “not observed” gap on any code path. Individual values can still be incomplete on a particular call; see the capture statuses.

Every call is recorded as an Entry record (the six argument words and the pointees copied at entry) and an Exit record (the return value and the pointees copied at exit).

Arguments

Argument	When	How	Recorded field key	Condition
fd (arg0)	Entry	raw scalar word	args.0, args.fd
umyaddr (arg1)	Entry	the pointer itself, as a raw word	args.1, args.raw[1]
↳ pointee	Entry	socket address (sockaddr layout), length from addrlen (arg2); “invalid extent” above sizeof(sockaddr_storage)	arg1.address	always
addrlen (arg2)	Entry	raw scalar word	args.2, args.addrlen

Filter fields

• Result: ret, syscall.errno, syscall.success, syscall.duration_ns.
• Argument words: args.fd (arg0), args.umyaddr (arg1), args.addrlen (arg2); args.0 to args.5 by position.
• Structure sockaddr behind umyaddr (arg1): args.umyaddr.<member> for sa_family.

See Syscall Trace filter for the full syntax.

For what the capture statuses mean, see Capture statuses. For what is never recorded, see Known gaps.