NAME
initgroups —
initialize group access list
LIBRARY
library “libc”
SYNOPSIS
#include
<unistd.h>
int
initgroups(const
char *name, gid_t
basegid);
DESCRIPTION
Theinitgroups()
function uses the
getgrouplist(3) function to calculate the group access list for
the user specified in name. This group list is then
setup for the current process using
setgroups(2). The basegid is
automatically included in the groups list. Typically this value is given as
the group number from the password file.
RETURN VALUES
The initgroups() function returns the
value 0 if successful; otherwise the value -1 is returned and
the global variable errno is set to indicate the
error.
ERRORS
The initgroups() function may fail and set
errno for any of the errors specified for the library
function
setgroups(2).
SEE ALSO
HISTORY
The initgroups() function appeared in
4.2BSD.
BUGS
The getgrouplist() function called by
initgroups() uses the routines based on
getgrent(3). If the invoking program uses any of these
routines, the group structure will be overwritten in the call to
initgroups().