int
initgroups(__const char * user, gid_t gid)
{
struct group * group;
#ifndef GR_DYNAMIC_GROUP_LIST
gid_t group_list[GR_MAX_GROUPS];
#else
gid_t * group_list=NULL;
#endif
char ** tmp_mem;
int num_groups;
int grp_fd;
if ((grp_fd=open(GROUP_FILE, O_RDONLY))<0)
return -1;
num_groups=0;
#ifdef GR_DYNAMIC_GROUP_LIST
group_list=(gid_t *) realloc(group_list, 1);
#endif
group_list[num_groups]=gid;
#ifndef GR_DYNAMIC_GROUP_LIST
while (num_groups<GR_MAX_GROUPS &&
(group=__getgrent(grp_fd))!=NULL)
#else
while ((group=__getgrent(grp_fd))!=NULL)
#endif
{
if (group->gr_gid!=gid);
{
tmp_mem=group->gr_mem;
while(*tmp_mem!=NULL)
{
if (!strcmp(*tmp_mem, user))
{
num_groups++;
#ifdef GR_DYNAMIC_GROUP_LIST
group_list=(gid_t *)realloc(group_list,
num_groups*sizeof(gid_t *));
#endif
group_list[num_groups]=group->gr_gid;
}
tmp_mem++;
}
}
}
close(grp_fd);
return setgroups(num_groups, group_list);
}
struct group *getgrnam(const char *name)
{
int grp_fd;
struct group *group;
if (name == NULL) {
__set_errno(EINVAL);
return NULL;
}
if ((grp_fd = open(_PATH_GROUP, O_RDONLY)) < 0)
return NULL;
LOCK;
while ((group = __getgrent(grp_fd, line_buff, members)) != NULL)
if (!strcmp(group->gr_name, name)) {
close(grp_fd);
UNLOCK;
return group;
}
close(grp_fd);
UNLOCK;
return NULL;
}
struct group *
getgrent(void)
{
if (grp_fd==-1)
return NULL;
return __getgrent(grp_fd);
}
struct group *fgetgrent(FILE * file)
{
if (file == NULL) {
errno = EINTR;
return NULL;
}
return __getgrent(fileno(file));
}
struct group *fgetgrent(FILE * file)
{
struct group *grp;
if (file == NULL) {
__set_errno(EINTR);
return NULL;
}
LOCK;
grp = __getgrent(fileno(file), line_buff, members);
UNLOCK;
return grp;
}
struct group *getgrgid(const gid_t gid)
{
struct group *group;
int grp_fd;
if ((grp_fd = open(_PATH_GROUP, O_RDONLY)) < 0)
return NULL;
LOCK;
while ((group = __getgrent(grp_fd, line_buff, members)) != NULL)
if (group->gr_gid == gid) {
close(grp_fd);
UNLOCK;
return group;
}
close(grp_fd);
UNLOCK;
return NULL;
}
struct group *getgrnam(const char *name)
{
int grp_fd;
struct group *group;
if (name == NULL) {
errno = EINVAL;
return NULL;
}
if ((grp_fd = open("/etc/group", O_RDONLY)) < 0)
return NULL;
while ((group = __getgrent(grp_fd)) != NULL)
if (!strcmp(group->gr_name, name)) {
close(grp_fd);
return group;
}
close(grp_fd);
return NULL;
}
