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.TH "CAPNG_SETPID" "3" "June 2009" "Red Hat" "Libcap-ng API"
.SH NAME
capng_setpid \- set working pid
.SH "SYNOPSIS"
.B #include <cap-ng.h>
.sp
void capng_setpid(int pid);
.SH "DESCRIPTION"
capng_pid sets the working pid for capabilities operations. This is useful if you want to get the capabilities of a different process.
.SH NOTES
If your process calls
.B 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
.B 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
.B capng_setpid
and adjust the stored pid manually.
.SH "RETURN VALUE"
None.
.SH "SEE ALSO"
.BR capng_get_caps_process (3),
.BR capabilities (7)
.SH AUTHOR
Steve Grubb
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