The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008, 2016 Edition
Copyright © 2001-2016 The IEEE and The Open Group

NAME

getegid - get the effective group ID

SYNOPSIS

#include <unistd.h>

gid_t getegid(void);

DESCRIPTION

The getegid() function shall return the effective group ID of the calling process. The getegid() function shall not modify errno.

RETURN VALUE

The getegid() function shall always be successful and no return value is reserved to indicate an error.

ERRORS

No errors are defined.


The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

None.

RATIONALE

In a conforming environment, getegid() will always succeed. It is possible for implementations to provide an extension where a process in a non-conforming environment will not be associated with a user or group ID. It is recommended that such implementations return (gid_t)-1 and set errno to indicate such an environment; doing so does not violate this standard, since such an environment is already an extension.

FUTURE DIRECTIONS

None.

SEE ALSO

geteuid, getgid, getuid, setegid, seteuid, setgid, setregid, setreuid, setuid

XBD <sys/types.h>, <unistd.h>

CHANGE HISTORY

First released in Issue 1. Derived from Issue 1 of the SVID.

Issue 6

In the SYNOPSIS, the optional include of the <sys/types.h> header is removed.

The following new requirements on POSIX implementations derive from alignment with the Single UNIX Specification:

Issue 7

POSIX.1-2008, Technical Corrigendum 2, XSH/TC2-2008/0156 [511] is applied.

End of informative text.

 

return to top of page

UNIX ® is a registered Trademark of The Open Group.
POSIX ® is a registered Trademark of The IEEE.
Copyright © 2001-2016 The IEEE and The Open Group, All Rights Reserved
[ Main Index | XBD | XSH | XCU | XRAT ]