matchmediacon(3) SELinux API documentation matchmediacon(3)NAME
matchmediacon - get the default SELinux security context for the specified mediatype from the policy.
SYNOPSIS
#include <selinux/selinux.h>
int matchmediacon(const char *media, security_context_t *con);"
DESCRIPTION
matchmediacon matches the specified media type with the media contexts configuration and sets the security context "con" to refer to the
resulting context.
Note:
Caller must free returned security context "con" using freecon.
RETURN VALUE
Returns 0 on success or -1 otherwise.
Files
/etc/selinux/POLICYTYPE/contexts/files/media
SEE ALSO selinux(8), freecon(3)dwalsh@redhat.com 15 November 2004 matchmediacon(3)
Check Out this Related Man Page
getcon(3) SELinux API documentation getcon(3)NAME
getcon, getprevcon, getpidcon - get SELinux security context of a process.
freecon, freeconary - free memory associated with SELinux security contexts.
getpeercon - get security context of a peer socket.
setcon - set current security context of a process.
SYNOPSIS
#include <selinux/selinux.h>
int getcon(security_context_t *context);
int getprevcon(security_context_t *context);
int getpidcon(pid_t pid, security_context_t *context);
int getpeercon(int fd, security_context_t *context);
void freecon(security_context_t con);
void freeconary(security_context_t *con);
int setcon(security_context_t context);
DESCRIPTION
getcon retrieves the context of the current process, which must be free'd with freecon.
getprevcon same as getcon but gets the context before the last exec.
getpidcon returns the process context for the specified PID.
getpeercon retrieves context of peer socket, and set *context to refer to it, which must be free'd with freecon.
freecon frees the memory allocated for a security context.
freeconary frees the memory allocated for a context array.
If con is NULL, no operation is performed.
setcon sets the current security context of the process to a new value. Note that use of this function requires that the entire applica-
tion be trusted to maintain any desired separation between the old and new security contexts, unlike exec-based transitions performed via
setexeccon(3). When possible, decompose your application and use setexeccon() and execve() instead.
Since access to file descriptors is revalidated upon use by SELinux, the new context must be explicitly authorized in the policy to use the
descriptors opened by the old context if that is desired. Otherwise, attempts by the process to use any existing descriptors (including
stdin, stdout, and stderr) after performing the setcon() will fail.
A multi-threaded application can perform a setcon() prior to creating any child threads, in which case all of the child threads will
inherit the new context. However, setcon() will fail if there are any other threads running in the same process.
If the process was being ptraced at the time of the setcon() operation, ptrace permission will be revalidated against the new context and
the setcon() will fail if it is not allowed by policy.
RETURN VALUE
On error -1 is returned. On success 0 is returned.
SEE ALSO selinux(8), setexeccon(3)russell@coker.com.au 21 December 2011 getcon(3)
I have a huge matrix file containing some 1.5 million rows and 6000 columns. The matrix looks something like this:
1 2 3
4 5 6
7 8 9
3 4 5
I want to add all the numbers in the columns of this matrix and display the result to my stdout. This means that the numbers in the first column are:
... (2 Replies)
Hi,
Just trying to get to grips with sed and awk for some reporting for work and I need some assistance:
I have a file that lists policy names on the first line and then on the second line whether the policy is active or not.
Policy Name: Policy1
Active: yes
Policy... (8 Replies)
version info :
vi availabe with RHEL 5.4
I have a text file with 10,000 lines. I want to copy lines from 5000th line to 7000th and redirect to a file. Any idea how I can do this?
Note:
The above scenario is just an example. In my actual requirement, the file has 14 million lines and I want... (9 Replies)
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello,
I couldn't find an actual introduction thread, so I decided to just put this here.
I go by d0wngrade online. I have been programming in multiple languages for about 15+ years. I started with standard web design languages like HTML and CSS, but I then advanced from design to development... (2 Replies)
Hi guys...
The first active code line in AudioScope.sh is set -u .
This causes a complete exit if a variable is used/found but has not been allocated at the start of the program.
However, apart from writing code to do the task, is there a switch to to check which variables have been... (17 Replies)
Hi.
In thread https://www.unix.com/shell-programming-and-scripting/267833-grouping-counting.html rovf and I had a mini-discussion on grep and awk.
Here is a demo script that compares the awk and grep approaches for this single problem:
#!/usr/bin/env bash
# @(#) s2 Demonstrate group... (1 Reply)
Hello,
I have to fish out some specific columns from a file based on the header value. I have the list of columns I need in a different file. I thought I could read in the list of headers I need,
# file with header names of required columns in required order
headers_file=$2
# read contents... (11 Replies)
For those interested in installing dash shell on OSX Lion to help test POSIX compliancy of shell scripts, it is quite easy. I did it like this:
If you don't have gcc on your system:
0. Download and install the Command Line Tools for Xcode package from Sign In - Apple *
1. Download the dash... (2 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
I have data of an excel files as given below,
file1
org1_1 1 1 2.5 100
org1_2 1 2 5.5 98
org1_3 1 3 7.2 88
file2
org2_1 1 1 2.5 100
org2_2 1 2 5.5 56
org2_3 1 3 7.2 70
I have multiple excel files as above shown.
I have to copy column 1, column 4 and paste into a new excel file as... (26 Replies)
Dear All,
Taking a break from Vue.js coding for the site, SEO and YT videos; and hopefully addressing some well deserved criticism from some here that I have been too focused on the visual aspects of the forums versus the substance and the community....
While the "current generation... (9 Replies)
Hi all...
Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default.
Many tricky terminal escape codes are not catered for so I had to create workarounds.
One thing I searched for was this:
Passing perl variable to shell command
AND, @Neo this was... (15 Replies)