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getgid(2) System Calls Manual getgid(2)
NAME
getgid, getegid - Gets the process group ID
SYNOPSIS
#include <unistd.h>
gid_t getgid (void);
gid_t getegid (void);
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 X/Open standards,
but may be required on other vendors' systems that conform to these standards.
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
getgid(), getegid(): POSIX.1, XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
DESCRIPTION
The getgid() function returns the real group ID of the calling process.
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.
RETURN VALUES
The getgid() and getegid() functions return the requested group ID. They are always successful.
RELATED INFORMATION
Commands: groups(1)
Functions: getgroups(2), initgroups(3), setgroups(2), setregid(2)
Standards: standards(5) delim off
getgid(2)