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

NAME

pr_unlink - inject unlink system call into victim process

LIBRARY

Process Control Library (libproc, -lproc)

SYNOPSIS

#include <libproc.h>

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

DESCRIPTION

The pr_unlink() function injects the unlink(2) system call into the
target process P by means of the agent LWP. If the process handle P is
the value NULL then this will be equivalent to calling unlink(2) on the
currently running process.

The argument path has the same meaning as in unlink(2). See unlink(2)
for the full description and purpose of the unlink system call and its
arguments.

The pr_unlink() 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_unlink() function's return value is
that described in unlink(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 unlink(2).

The pr_unlink() 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

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

illumos November 27, 2023 illumos