getexeccon(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON

getexeccon(3)           SELinux API documentation          getexeccon(3)

NAME         top

       getexeccon, setexeccon - get or set the SELinux security context
       used for executing a new process

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

SYNOPSIS         top

       #include <selinux/selinux.h>

       int getexeccon(char **context);

       int getexeccon_raw(char **context);

       int setexeccon(char *context);

       int setexeccon_raw(char *context);

       int setexecfilecon(const char *filename, const char
       *fallback_type);

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

DESCRIPTION         top

       getexeccon() retrieves the context used for executing a new
       process.  This returned context should be freed with freecon(3)
       if non-NULL.  getexeccon() sets *context to NULL if no exec
       context has been explicitly set by the program (i.e. using the
       default policy behavior).

       setexeccon() sets the context used for the next execve(2) call.
       NULL can be passed to setexeccon() to reset to the default policy
       behavior.  The exec context is automatically reset after the next
       execve(2), so a program doesn't need to explicitly sanitize it
       upon startup.

       setexeccon() can be applied prior to library functions that
       internally perform an execve(2), e.g.  execl*(3), execv*(3),
       popen(3), in order to set an exec context for that operation.

       getexeccon_raw() and setexeccon_raw() behave identically to their
       non-raw counterparts but do not perform context translation.

       Note: Signal handlers that perform an execve(2) must take care to
       save, reset, and restore the exec context to avoid unexpected
       behavior.

       setexecfilecon() sets the context used for the next execve(2)
       call, based on the policy for the filename, and falling back to a
       new context with a fallback_type in case there is no transition.

       rpm_execcon() is deprecated; please use setexecfilecon() in
       conjunction with execve(2) in all new code. This function 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.

RETURN VALUE         top

       On error -1 is returned.

       On success getexeccon(), setexeccon() and setexecfilecon() return
       0.  rpm_execcon() only returns upon errors, as it calls
       execve(2).

SEE ALSO         top

       selinux(8), freecon(3), getcon(3)

COLOPHON         top

       This page is part of the selinux (Security-Enhanced Linux user-
       space libraries and tools) project.  Information about the
       project can be found at 
       ⟨https://github.com/SELinuxProject/selinux/wiki⟩.  If you have a
       bug report for this manual page, see
       ⟨https://github.com/SELinuxProject/selinux/wiki/Contributing⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/SELinuxProject/selinux⟩ on 2021-04-01.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-03-18.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

russell@coker.com.au         1 January 2004                getexeccon(3)

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