setpriority

Implemented in Antinomie 0.7.0 · Syscall list

Synopsis

long setpriority(int which, int who, int niceval);

Number (x86-64)	141
ABI	common
Kernel entry point	sys_setpriority

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

Description

Sets the nice value of a process, group or user.

Arguments

Name	Type	Meaning
which (arg0)	int	Selects which object or timer the call applies to.
who (arg1)	int	Id the call applies to, interpreted by which.
niceval (arg2)	int	Nice value.

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.
-1	EPERM	The operation is not permitted for this process.
-3	ESRCH	No such process or thread.

Man page

setpriority(2) on man7.org

Captured by Antinomie

Coverage mark: Implemented. All arguments are plain values, recorded as the raw argument words at entry. There is no pointee to copy and no known gap.

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
which (arg0)	Entry	raw scalar word	args.0, args.which
who (arg1)	Entry	raw scalar word	args.1, args.who
niceval (arg2)	Entry	raw scalar word	args.2, args.niceval

Filter fields

• Result: ret, syscall.errno, syscall.success, syscall.duration_ns.
• Argument words: args.which (arg0), args.who (arg1), args.niceval (arg2); args.0 to args.5 by position.

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.