PRISON_CHECK(9) BSD Kernel Developer's Manual PRISON_CHECK(9)NAME
prison_check -- determine if two credentials belong to the same jail
SYNOPSIS
#include <sys/jail.h>
int
prison_check(struct ucred *cred1, struct ucred *cred2);
DESCRIPTION
This function can be used to determine if the two credentials cred1 and cred2 belong to the same jail.
RETURN VALUES
The prison_check() function returns ESRCH if cred1 has been jailed, and cred1 and cred2 do not belong to the same jail. In all other cases,
prison_check() returns zero.
SEE ALSO jail(2)BSD December 11, 2003 BSD
Check Out this Related Man Page
P_CANDEBUG(9) BSD Kernel Developer's Manual P_CANDEBUG(9)NAME
p_candebug -- determine debuggability of a process
SYNOPSIS
#include <sys/param.h>
#include <sys/proc.h>
int
p_candebug(struct thread *td, struct proc *p);
DESCRIPTION
This function can be used to determine if a given process p is debuggable by the thread td.
SYSCTL VARIABLES
The following sysctl(8) variables directly influence the behaviour of p_candebug():
kern.securelevel
Debugging of the init process is not allowed if this variable is 1 or greater.
security.bsd.unprivileged_proc_debug
Must be set to a non-zero value to allow unprivileged processes access to the kernel's debug facilities.
RETURN VALUES
The p_candebug() function returns 0 if the process denoted by p is debuggable by thread td, or a non-zero error return value otherwise.
ERRORS
[EACCESS] The MAC subsystem denied debuggability.
[EAGAIN] Process p is in the process of being exec()'ed.
[EPERM] Thread td lacks super-user credentials and process p is executing a set-user-ID or set-group-ID executable.
[EPERM] Thread td lacks super-user credentials and process p's group set is not a subset of td's effective group set.
[EPERM] Thread td lacks super-user credentials and process p's user IDs do not match thread td's effective user ID.
[EPERM] Process p denotes the initial process initproc() and the sysctl(8) variable kern.securelevel is greater than zero.
[ESRCH] Process p is not visible to thread td as determined by cr_seeotheruids(9) or cr_seeothergids(9).
[ESRCH] Thread td has been jailed and process p does not belong to the same jail as td.
[ESRCH] The MAC subsystem denied debuggability.
SEE ALSO jail(2), sysctl(8), cr_seeothergids(9), cr_seeotheruids(9), mac(9), p_cansee(9), prison_check(9)BSD November 19, 2006 BSD
The UNIX and Linux Forums have a number of active members that have published books or papers related to shell programming and scripting. You can check out their publications here:
Link Removed
Please note, as you can imagine, our forum experts can be quite busy! You will get a response... (0 Replies)
Emergency UNIX and Linux Support !! Help Me! Forum (Request Urgent Help)
README FIRST: How to Request Emergency or Urgent Help:
You may post emergency work-related questions in the emergency forum. To post in this forum you will need to use your Bits. All questions answered on a "best... (0 Replies)
Homework Help:
On Posting Questions:
Any and all high school and undergraduate homework assignments or textbook style exercises for which you are seeking assistance are to be posted only in our Homework & Coursework Questions area--not in blogs, visitor messages, PMs, or the main technical... (0 Replies)
Dear Forum Members,
The UNIX and Linux Forums are working directly with the Red Cross to provide ad banners on our site to support Earthquake and Tsunami Relief in Japan. Registered users do not see these banners. However, if you wish to contribute directly on behalf of yourself and the... (8 Replies)
How to Use Code Tags in The UNIX and Linux Forums
Developer: This video tutorial was created by scott for forum users. Everyone should use code tags when posting code and command line logic in the forums.
cPF45jjWe7Q
A full list of BB codes is available here. (8 Replies)
RULES OF THE UNIX AND LINUX FORUMS
For the latest version of the community rules (the official community rules page), please visit here.
No flames, shouting (all caps), sarcasm, bullying, profanity or arrogant posts.
No negative comments about others or impolite remarks. Be patient. No... (1 Reply)
I see lot of ad-hoc shell scripts in our servers which don't have a shebang at the beginning .
Does this mean that it will run on any shell ?
Is it a good practice to create scripts (even ad-hoc ones) without shebang ? (16 Replies)
Having spent a lot of time over the past year taking a legacy vBulletin site (this forum) and making the site responsive on mobile; I've happy with the results; but it will soon be time to move on.
Basically, at our core, we are a LAMP (Linux, Apache2, MySQL and PHP) site, and vBulletin was... (6 Replies)
Here are some answers to some of the recent questions I have received about UNIX.COM. So, I thought I would take time to answer them here in this post:
Is it expected that the original poster "thank" everyone who responds to his / her discussion thread?
It is always a good practice in all... (7 Replies)
By special request, and long overdue, I have updated our "code tags" video and so now we have:
How to Use Code Tags and Format Posts @UNIX.com in 4K
https://youtu.be/4BuPvWJV__k (3 Replies)
Here is a quick EOY report for 2019.
2019 has been a year of "downward trend reversal" for UNIX.com. In fact, if we compare total Google search impressions from the peak days in December 2019 to the peak days in mid December 2018, traffic is up 43% percent. That is a very respectable growth... (0 Replies)