.TH "getexeccon" "3" "1 January 2004" "russell@coker.com.au" "SE Linux API documentation"

.SH "NAME"

getexeccon, setexeccon \- get or set the SE Linux security context used for executing a new process.

.br

rpm_execcon \- run a helper for rpm in an appropriate security context

.SH "SYNOPSIS"

.B #include <selinux/selinux.h>

.sp

.BI "int getexeccon(security_context_t *" context );

.br 

.BI "int setexeccon(security_context_t "context );

.br 

.BI "int rpm_execcon(unsigned int " verified ", const char *" filename ", char *const " argv "[] , char *const " envp "[]);

.SH "DESCRIPTION"

.B getexeccon

retrieves the context used for executing a new process.

This returned context should be freed with freecon if non-NULL.  

getexeccon sets *con to NULL if no exec context has been explicitly 

set by the program (i.e. using the default policy behavior).

.B setexeccon

sets the context used for the next execve call.  

NULL can be passed to

setexeccon to reset to the default policy behavior.  

The exec context is automatically reset after the next execve, so a

program doesn't need to explicitly sanitize it upon startup.  

.br

setexeccon can be applied prior to library

functions that internally perform an execve, e.g. execl*, execv*, popen,

in order to set an exec context for that operation.  

.br

Note: Signal handlers that perform an execve must take care to

save, reset, and restore the exec context to avoid unexpected behaviors.

.br

.B rpm_execcon

runs a helper for rpm in an appropriate security context.  The

verified parameter should contain the return code from the signature

verification (0 == ok, 1 == notfound, 2 == verifyfail, 3 ==

nottrusted, 4 == nokey), although this information is not yet used by

the function.  The function determines the proper security context for

the helper based on policy, sets the exec context accordingly, and

then executes the specified filename with the provided argument and

environment arrays.

.SH "RETURN VALUE"

On error -1 is returned.

On success getexeccon and setexeccon returns 0.

rpm_execcon only returns upon errors, as it calls execve(2).

.SH "SEE ALSO"

.BR freecon "(3), " getcon "(3)"