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capng_setpid(3)

Red Hat
June 2009

libcap-ng-dev

Development and header files for libcap-ng

libcap-ng

A library making programming with POSIX capabilities easier than traditional libcap

libcap-ng-devel

Header files for libcap-ng library

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.

AUTHOR

Steve Grubb
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