NAME
p_cansee —
determine visibility of a
process
SYNOPSIS
#include
<sys/proc.h>
int
p_cansee(struct
thread *td, struct proc
*p);
DESCRIPTION
This function determines if a given process p is visible to the thread td, where the notion of “visibility” may be read as “awareness of existence”.
This function explicitly allows a thread to always see its own process, even with pending credentials changes (see ucred(9)). Otherwise, it simply defers to cr_cansee(9).
RETURN VALUES
The p_cansee() function returns
0 if the process denoted by p
is visible by thread td, or ESRCH otherwise.
ERRORS
- [
ESRCH] - Thread td is not part of process p and cannot see it as determined by cr_cansee(9).