getegid man page on DigitalUNIX

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getgid(2)							     getgid(2)

NAME
       getgid, getegid - Get the group ID of the calling process

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 Open  Group  specifica‐
       tions,  but might be required on other vendors' systems that conform to
       these standards.

STANDARDS
       Interfaces documented on this reference page conform to industry	 stan‐
       dards 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.

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 exe‐
       cution  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.

SEE ALSO
       Commands: groups(1)

       Functions: getgroups(2), setgroups(2), setregid(2), initgroups(3)

       Standards: standards(5)

								     getgid(2)
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