Section: Linux Programmer's Manual (2)
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getgid, getegid - get group identity
returns the real group ID of the calling process.
returns the effective group ID of the calling process.
These functions are always successful.
The original Linux
system calls supported only 16-bit group IDs.
Subsequently, Linux 2.4 added
supporting 32-bit IDs.
wrapper functions transparently deal with the variations across kernel versions.
This page is part of release 3.54 of the Linux
A description of the project,
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Time: 00:08:34 GMT, January 23, 2018