Originální popis anglicky:
initgroups - initialize the supplementary group access list
Návod, kniha: Linux Programmer's Manual
#include <sys/types.h>
#include <grp.h>
int initgroups(const char *user, gid_t group);
The
initgroups() function initializes the group access list by reading
the group database
/etc/group and using all groups of which
user
is a member. The additional group
group is also added to the list.
The
user argument must be non-NULL.
The
initgroups() function returns 0 on success, or -1 if an error occurs.
- ENOMEM
- Insufficient memory to allocate group information
structure.
- EPERM
- The calling process has insufficient privilege. See the
underlying system call setgroups(2).
/etc/group group database file
SVID 3, BSD 4.3
The prototype for
initgroups is only available if
_BSD_SOURCE is
defined (either explicitly, or implicitly, by not defining _POSIX_SOURCE or
compiling with the -ansi flag).
getgroups(2),
setgroups(2)
