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|P_CANSEE(9)||Kernel Developer's Manual||P_CANSEE(9)|
NAME¶p_cansee — determine visibility of a process
#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
0if the process denoted by p is visible by thread td, or a non-zero error return value otherwise.
- Process p is not visible to thread td as determined by cr_cansee(9).
- Thread td has been jailed and process p does not belong to the same jail as td.
- The MAC subsystem denied visibility.
SEE ALSO¶jail(2), sysctl(8), cr_cansee(9), mac(9), p_candebug(9), prison_check(9)
|November 19, 2006||Debian|