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https://github.com/SELinuxProject/selinux
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63 lines
2.2 KiB
Groff
63 lines
2.2 KiB
Groff
.TH "getcon" "3" "1 January 2004" "russell@coker.com.au" "SELinux API documentation"
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.SH "NAME"
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getcon, getprevcon, getpidcon \- get SELinux security context of a process.
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getpeercon - get security context of a peer socket.
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setcon - set current security context of a process.
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.SH "SYNOPSIS"
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.B #include <selinux/selinux.h>
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.sp
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.BI "int getcon(security_context_t *" context );
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.BI "int getprevcon(security_context_t *" context );
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.BI "int getpidcon(pid_t " pid ", security_context_t *" context );
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.BI "int getpeercon(int " fd ", security_context_t *" context);
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.BI "int setcon(security_context_t " context);
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.SH "DESCRIPTION"
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.B getcon
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retrieves the context of the current process, which must be free'd with
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freecon.
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.B getprevcon
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same as getcon but gets the context before the last exec.
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.B getpidcon
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returns the process context for the specified PID.
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.B getpeercon
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retrieves context of peer socket, and set *context to refer to it, which must be free'd with freecon.
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.B setcon
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sets the current security context of the process to a new value. Note
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that use of this function requires that the entire application be
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trusted to maintain any desired separation between the old and new
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security contexts, unlike exec-based transitions performed via
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setexeccon(3). When possible, decompose your application and use
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setexeccon() and execve() instead.
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Since access to file descriptors is revalidated upon use by SELinux,
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the new context must be explicitly authorized in the policy to use the
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descriptors opened by the old context if that is desired. Otherwise,
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attempts by the process to use any existing descriptors (including
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stdin, stdout, and stderr) after performing the setcon() will fail.
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A multi-threaded application can perform a setcon() prior to creating
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any child threads, in which case all of the child threads will inherit
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the new context. However, setcon() will fail if there are any other
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threads running in the same process.
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If the process was being ptraced at the time of the setcon()
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operation, ptrace permission will be revalidated against the new
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context and the setcon() will fail if it is not allowed by policy.
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.SH "RETURN VALUE"
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On error -1 is returned. On success 0 is returned.
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.SH "SEE ALSO"
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.BR selinux "(8), " freecon "(3), " setexeccon "(3)"
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