Index for Section 2

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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 specifications, but might 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, 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
  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.

SEE ALSO
  Commands: groups(1)

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

  Standards: standards(5)

Index for Section 2

Alphabetical listing for G

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