setegid(3) [osf1 man page]

setrgid(3)						     Library Functions Manual							setrgid(3)

NAME

       setrgid, setegid - Set the process's group IDs

LIBRARY

       Standard C Library (libc.a)

SYNOPSIS

       #include <sys/types.h>
       int setrgid(	 gid_t rgid);
       int setegid (	  gid_t egid);

PARAMETERS

       Specifies the value of the real group ID to be set.  Specifies the value of the effective group ID to be set.

DESCRIPTION

       The  setegid() function sets the process's effective group ID to the value of the egid parameter if the egid parameter is equal to the cur-
       rent real, effective, or saved group ID.

       The setrgid() function sets the process's real group ID to the value of the rgid parameter.

       Only the superuser may change the real or effective group ID to a value other than the current real or saved group ID of the process.

RETURN VALUES

       Upon successful completion, the setegid() and setrgid() functions return a value of 0 (zero).  If either function fails, a value of  -1	is
       returned and errno is set to indicate the error.

ERRORS

       If  the	setrgid()  or  setegid()  function  fails, errno is set to one of the following values: The rgid or egid parameter is not equal to
       either the real or saved group IDs of the process and the calling process does not have superuser privilege.

RELATED INFORMATION

       Functions: getgroups(2), setgroups(2), setregid(2).

       Commands: groups(1).  delim off

																	setrgid(3)

setregid(2)							System Calls Manual						       setregid(2)

NAME

       setregid - Sets the real and effective group ID

SYNOPSIS

       #include <unistd.h>

       setregid(      gid_t rgid,      gid_t egid );

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       setregid():  XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS

       Specifies the new real group ID.  Specifies the new effective group ID.

DESCRIPTION

       The  setregid() function sets the real group ID of the current process to the value specified by the rgid parameter, and sets the effective
       group ID to the value specified by the egid parameter.  If the value of rgid is -1, the real group ID is not changed; if the value of  egid
       is -1, the effective group ID is not changed.  The real and effective group IDs may be set to different values in the same call.

       Unprivileged users may change the effective group ID to the real group ID; only the superuser may make other changes.

       Any supplementary group IDs of the calling process remain unchanged.

RETURN VALUES

       Upon successful completion, a value of 0 (zero) is returned.  Otherwise, a value of -1 is returned and errno is set to indicate the error.

ERRORS

       The setregid() function sets errno to the specified values for the following conditions:

       The  value of the rgid egid parameter is invalid or out of range.  The current process does not have superuser privilege and a change other
       than changing the effective group ID to the real group ID was specified.

RELATED INFORMATION

       Functions: getgid(2), setgid(2), setrgid(3), setreuid(2)

       Standards: standards(5) delim off

																       setregid(2)