PR_ACCESS(3PROC) Process Control Library Functions PR_ACCESS(3PROC)

NAME

pr_access - inject access system call into victim process

LIBRARY

Process Control Library (libproc, -lproc)

SYNOPSIS

#include <libproc.h>

int
pr_access(struct ps_prochandle *P, const char *path, int amode);

DESCRIPTION

The pr_access() function injects the access(2) system call into the target
process P by means of the agent lwp. If the process handle P is NULL then
this is equivalent to calling access(2) on the currently running process.

The arguments path and amode have the same meaning as in access(2). See
access(2) for the full description and purpose of the access system call
and its arguments.

The pr_access() function only works on active processes. Process handles
that correspond to core files, zombie processes, or ELF objects do not
support system call injection.

RETURN VALUES

Upon successful completion, the pr_access() function's return value is that
described in access(2). Otherwise, -1 is returned and errno is set to
ENOSYS to indicate that the system call could not be injected.

ERRORS

For the full list of errors see the ERRORS section in access(2).

The pr_access() function will fail if:

ENOSYS An error occurred while trying to invoke the agent LWP
and inject a system call in the process handle P or the
process handle P does not support system call injection.

INTERFACE STABILITY

Uncommitted

MT-LEVEL
See LOCKING in libproc(3LIB).

SEE ALSO

access(2), libproc(3LIB), proc(5)

illumos November 27, 2023 illumos