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

NAME


pr_lseek - inject lseek system call into victim process

SYNOPSIS


Process Control Library (libproc, -lproc)
#include <libproc.h>

int
pr_lseek(struct ps_prochandle *P, int filedes, off_t offset, int whence);

DESCRIPTION


The pr_lseek() function injects the lseek(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 lseek(2) on the currently
running process.

The arguments filedes, offset, and whence have the same meaning as in
lseek(2). See lseek(2) for the full description and purpose of the lseek
system call and its arguments.

The pr_lseek() 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_lseek() function's return value is that
described in lseek(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 lseek(2).

The pr_lseek() 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


lseek(2), libproc(3LIB), proc(4)

illumos May 11, 2016 illumos