04-19-2009
Quote:
Originally Posted by
zxmaus
[...]2000 users per group[...]
Hm, this point might need clarification. Could you post a link (preferably to the IBM pSeries and AIX Information center) where you got that number from?
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LEARN ABOUT OSX
getgrouplist
GETGROUPLIST(3) BSD Library Functions Manual GETGROUPLIST(3)
NAME
getgrouplist -- calculate group access list
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
int
getgrouplist(const char *name, int basegid, int *groups, int *ngroups);
DESCRIPTION
The getgrouplist() function reads through the group file and calculates the group access list for the user specified in name. The basegid is
automatically included in the groups list. Typically this value is given as the group number from the password file.
The resulting group list is returned in the array pointed to by groups. The caller specifies the size of the groups array in the integer
pointed to by ngroups; the actual number of groups found is returned in ngroups.
RETURN VALUES
The getgrouplist() function returns -1 if the size of the group list is too small to hold all the user's groups. Here, the group array will
be filled with as many groups as will fit.
FILES
/etc/group group membership list
SEE ALSO
setgroups(2), initgroups(3)
HISTORY
The getgrouplist() function first appeared in 4.4BSD.
BUGS
The getgrouplist() function 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 getgrouplist().
BSD
June 9, 1993 BSD