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Manual Pages  — P_CANSEE

NAME

p_cansee – determine visibility of a process

CONTENTS

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).

SEE ALSO

cr_cansee(9), p_candebug(9), ucred(9)
P_CANSEE (9) August 18, 2023
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