pipe

Implemented in Antinomie 0.7.0 · Syscall list

Synopsis

long pipe(int *fildes);

Number (x86-64)	22
ABI	common
Kernel entry point	sys_pipe

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

Description

Creates a pipe and stores its read end and write end descriptors in a two-element array.

Arguments

Name	Type	Meaning
fildes (arg0)	int *	File descriptor to operate on.

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.
-24	EMFILE	The process has too many open file descriptors.

Man page

pipe(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
fildes (arg0)	Entry	the pointer itself, as a raw word	args.0, args.raw[0]
↳ pointee	Exit	structure int[2] (fixed size)	arg0.data	result is 0

Filter fields

• Result: ret, syscall.errno, syscall.success, syscall.duration_ns.
• Argument words: args.fildes (arg0); args.0 to args.5 by position.
• Structure wait_status behind fildes (arg0): args.fildes.<member> for value.

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.