SIMPLE SOLUTIONS

P_CANSEE(9FREEBSD) - Linux man page online | System kernel interfaces

Determine visibility of a process.

Chapter
November 19, 2006
P_CANSEE(9) BSD Kernel Developer's Manual P_CANSEE(9)

NAME

p_cansee — determine visibility of a process

SYNOPSIS

#include <sys/param.h> #include <sys/proc.h> int p_cansee(struct thread *td, struct proc *p);

DESCRIPTION

This function can be used to determine if a given process p is visible to the thread td, where the notion of “visibility” may be read as “awareness of existence”. The function is implemented using cr_cansee(9), and the dependencies on sysctl(8) variables documented in the cr_cansee(9) manual page apply.

RETURN VALUES

The p_cansee() function returns 0 if the process denoted by p is visible by thread td, or a non-zero error return value otherwise.

ERRORS

[ESRCH] Process p is not visible to thread td as determined by cr_cansee(9). [ESRCH] Thread td has been jailed and process p does not belong to the same jail as td. [ESRCH] The MAC subsystem denied visibility.

SEE ALSO

jail(2), sysctl(8), cr_cansee(9), mac(9), p_candebug(9), prison_check(9)
BSD November 19, 2006 BSD
This manual Reference Other manuals
p_cansee(9freebsd) referred by cr_cansee(9freebsd) | p_candebug(9freebsd) | pget(9freebsd) | rtprio(2freebsd) | rtprio_thread(2freebsd)
refer to cr_cansee(9freebsd) | jail(2freebsd) | mac(9freebsd) | p_candebug(9freebsd) | prison_check(9freebsd) | sysctl(8)
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