sunos man page for initgroups

initgroups(3C)						   Standard C Library Functions 					    initgroups(3C)

NAME
       initgroups - initialize the supplementary group access list

SYNOPSIS
       #include <grp.h>
       #include <sys/types.h>

       int initgroups(const char *name, gid_t basegid);

DESCRIPTION
       The  initgroups() function reads the group database to get the group membership for the user specified by name, and initializes the supple-
       mentary group access list of the calling process (see getgrnam(3C) and getgroups(2)). The basegid group ID is also included in the  supple-
       mentary group access list. This is typically the real group ID from the user database.

       While  scanning the group database, if the number of groups, including the basegid entry, exceeds NGROUPS_MAX, subsequent group entries are
       ignored.

RETURN VALUES
       Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error.

ERRORS
       The initgroups() function will fail and not change the supplementary group access list if:

       EPERM	The {PRIV_PROC_SETID} privilege is not asserted in the effective set of the calling process.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       getgroups(2), getgrnam(3C), attributes(5)

SunOS 5.10							    22 Mar 2004 						    initgroups(3C)