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

NAME

pr_fcntl - inject fcntl system call into victim process

LIBRARY

Process Control Library (libproc, -lproc)

SYNOPSIS

#include <libproc.h>

int
pr_fcntl(struct ps_prochandle *P, int fd, int cmd, void *argp);

DESCRIPTION

The pr_fcntl() function injects the fcntl(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 fcntl(2) on the currently running process.

The arguments fd, cmd, and argp have the same meaning as in fcntl(2). See
fcntl(2) for the full description and purpose of the fcntl system call and
its arguments.

The pr_fcntl() 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_fcntl() function's return value is that
described in fcntl(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 fcntl(2).

The pr_fcntl() 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

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

illumos November 27, 2023 illumos