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nss_wrapper: add support for getgrouplist.

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Guenther
This commit is contained in:
Günther Deschner 2009-05-29 09:19:16 +02:00
parent 684d3dddd6
commit 8db4917290
2 changed files with 85 additions and 0 deletions
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79
lib/nss_wrapper/nss_wrapper.c
View File

@ -90,6 +90,7 @@
#define real_initgroups_dyn initgroups_dyn
*/
#define real_initgroups initgroups
#define real_getgrouplist getgrouplist
#define real_getgrnam getgrnam
#define real_getgrnam_r getgrnam_r
@ -1222,3 +1223,81 @@ _PUBLIC_ void nwrap_endgrent(void)
nwrap_files_endgrent();
}
static int nwrap_files_getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups)
{
struct group *grp;
gid_t *groups_tmp;
int count = 1;
const char *name_of_group = NULL;
NWRAP_DEBUG(("%s: getgrouplist called for %s\n", __location__, user));
groups_tmp = (gid_t *)malloc(count * sizeof(gid_t));
if (!groups_tmp) {
NWRAP_ERROR(("%s:calloc failed\n",__location__));
errno = ENOMEM;
return -1;
}
memcpy(groups_tmp, &group, sizeof(gid_t));
grp = nwrap_getgrgid(group);
if (grp) {
name_of_group = grp->gr_name;
}
nwrap_files_setgrent();
while ((grp = nwrap_files_getgrent()) != NULL) {
int i = 0;
NWRAP_VERBOSE(("%s: inspecting %s for group membership\n",
__location__, grp->gr_name));
for (i=0; grp->gr_mem && grp->gr_mem[i] != NULL; i++) {
if ((strcmp(user, grp->gr_mem[i]) == 0) &&
(strcmp(name_of_group, grp->gr_name) != 0)) {
NWRAP_DEBUG(("%s: %s is member of %s\n",
__location__, user, grp->gr_name));
groups_tmp = (gid_t *)realloc(groups_tmp, (count + 1) * sizeof(gid_t));
if (!groups_tmp) {
NWRAP_ERROR(("%s:calloc failed\n",__location__));
errno = ENOMEM;
return -1;
}
memcpy(&groups_tmp[count], &grp->gr_gid, sizeof(gid_t));
count++;
}
}
}
nwrap_files_endgrent();
NWRAP_VERBOSE(("%s: %s is member of %d groups: %d\n",
__location__, user, *ngroups));
if (*ngroups < count) {
*ngroups = count;
free(groups_tmp);
return -1;
}
*ngroups = count;
memcpy(groups, groups_tmp, count * sizeof(gid_t));
free(groups_tmp);
return count;
}
_PUBLIC_ int nwrap_getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups)
{
if (!nwrap_enabled()) {
return real_getgrouplist(user, group, groups, ngroups);
}
return nwrap_files_getgrouplist(user, group, groups, ngroups);
}

6
lib/nss_wrapper/nss_wrapper.h
View File

@ -46,6 +46,7 @@ int nwrap_getpwent_r(struct passwd *pwbuf, char *buf,
size_t buflen, struct passwd **pwbufp);
void nwrap_endpwent(void);
int nwrap_initgroups(const char *user, gid_t group);
int nwrap_getgrouplist(const char *user, gid_t group, gid_t *groups, int *ngroups);
struct group *nwrap_getgrnam(const char *name);
int nwrap_getgrnam_r(const char *name, struct group *gbuf,
char *buf, size_t buflen, struct group **gbufp);
@ -120,6 +121,11 @@ void nwrap_endgrent(void);
#endif
#define initgroups nwrap_initgroups
#ifdef getgrouplist
#undef getgrouplist
#endif
#define getgrouplist nwrap_getgrouplist
#ifdef getgrnam
#undef getgrnam
#endif