getgid, getegid - Get the group ID of the calling process
void ); gid_t getegid(
Application developers may want to specify an #include
statement for <sys/types.h> before the one for <unistd.h>
if programs are being developed for multiple platforms.
The additional #include statement is not required on Tru64
UNIX systems or by ISO or Open Group specifications, but
might be required on other vendors' systems that conform
to these standards.
Interfaces documented on this reference page conform to
industry standards as follows:
getgid(), getegid(): POSIX.1, XSH4.0, XSH4.2, XSH5.0
Refer to the standards(5) reference page for more information
about industry standards and associated tags.
The getgid() function returns the real group ID of the
The getegid() function returns the effective group ID of
the calling process.
The real group ID is specified at login time. The effective
group ID is more transient, and determines additional
access permission during execution of a ``set-group-ID''
process. It is for such processes that the getgid() function
is most useful.
The getgid() and getegid() functions return the requested
group ID. They are always successful.
Functions: getgroups(2), setgroups(2), setregid(2), initgroups(3)
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