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

NAME

pr_lseek - inject lseek system call into victim process

LIBRARY

Process Control Library (libproc, -lproc)

SYNOPSIS

#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(5)

illumos November 27, 2023 illumos