capng_setpid(3) — Linux manual page

CAPNG_SETPID(3)               Libcap-ng API              CAPNG_SETPID(3)

NAME

       capng_setpid - set working pid

SYNOPSIS

       #include <cap-ng.h>

       void capng_setpid(int pid);

DESCRIPTION

       capng_pid sets the working pid for capabilities operations. This
       is useful if you want to get the capabilities of a different
       process.

NOTES

       If your process calls fork , then the child process will still
       have the pid of the parent process stored in libcap-ng's internal
       data. It is disallowed to do any kind of setcap operations
       because you would be crossing process boundaries. To correct
       this, if your program links against pthreads, then libcap-ng will
       use the pthread_atfork function (as a weak symbol) to reset the
       pid information to the new process automatically. You are not
       required to link against pthreads. You can call capng_setpid and
       adjust the stored pid manually.

RETURN VALUE

       None.

SEE ALSO

       capng_get_caps_process(3), capabilities(7)

AUTHOR

       Steve Grubb

COLOPHON

       This page is part of the libcap-ng (capabilities commands and
       library (NG)) project.  Information about the project can be
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Red Hat                         June 2009                CAPNG_SETPID(3)

Pages that refer to this page: capng_get_caps_process(3)

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