sethostname

Implemented in Antinomie 0.7.0 · Syscall list

Synopsis

long sethostname(char *name, int len);

Number (x86-64)	170
ABI	common
Kernel entry point	sys_sethostname

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

Description

Sets the system’s host name.

Arguments

Name	Type	Meaning
name (arg0)	char *	Name string (a path, queue name, module name or attribute name depending on the call).
len (arg1)	int	Length in bytes.

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
-14	EFAULT	A pointer argument points outside the accessible address space.
-22	EINVAL	An argument is invalid.
-1	EPERM	The operation is not permitted for this process.

Man page

sethostname(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
name (arg0)	Entry	the pointer itself, as a raw word	args.0, args.raw[0]
↳ pointee	Entry	bytes, length from len (arg1) up to 64; “invalid extent” above 64 or if negative	arg0.name	always
len (arg1)	Entry	raw scalar word	args.1, args.len

Filter fields

• Result: ret, syscall.errno, syscall.success, syscall.duration_ns.
• Argument words: args.name (arg0), args.len (arg1); args.0 to args.5 by position.
• Captured strings: the args.<name> field of a path argument, and args.path, give the captured text instead of the pointer.

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.