char *buffer, size_t buflen, int *errnop);
-static service_user *
-nss_group_nonlocal_database(void)
+static service_user *__nss_group_nonlocal_database;
+
+static int
+internal_function
+__nss_group_nonlocal_lookup(service_user **ni, const char *fct_name,
+ void **fctp)
{
- static service_user *nip = NULL;
- if (nip == NULL)
- __nss_database_lookup("group_nonlocal", NULL, "", &nip);
+ if (__nss_group_nonlocal_database == NULL
+ && __nss_database_lookup("group_nonlocal", NULL, NULL,
+ &__nss_group_nonlocal_database) < 0)
+ return -1;
+
+ *ni = __nss_group_nonlocal_database;
- return nip;
+ *fctp = __nss_lookup_function(*ni, fct_name);
+ return 0;
}
enum nss_status
check_nonlocal_gid(const char *user, gid_t gid, int *errnop)
{
- static const char *fct_name = "getgrgid_r";
- static service_user *startp = NULL;
- static void *fct_start = NULL;
enum nss_status status;
- service_user *nip;
- union {
- enum nss_status (*l)(gid_t gid, struct group *grp,
- char *buffer, size_t buflen, int *errnop);
- void *ptr;
- } fct;
struct group gbuf;
- int old_errno = errno;
-
+ char *buf;
size_t buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
- char *buf = malloc(buflen);
- errno = old_errno;
- if (buf == NULL) {
- *errnop = ENOMEM;
- return NSS_STATUS_TRYAGAIN;
- }
-
- if (fct_start == NULL &&
- __nss_group_lookup(&startp, fct_name, &fct_start) != 0) {
- free(buf);
- return NSS_STATUS_UNAVAIL;
- }
- nip = startp;
- fct.ptr = fct_start;
- do {
- morebuf:
- if (fct.l == _nss_nonlocal_getgrgid_r)
- status = NSS_STATUS_NOTFOUND;
- else
- status = DL_CALL_FCT(fct.l, (gid, &gbuf, buf, buflen, errnop));
- if (status == NSS_STATUS_TRYAGAIN && *errnop == ERANGE) {
- free(buf);
- buflen *= 2;
- buf = malloc(buflen);
- errno = old_errno;
- if (buf == NULL) {
- *errnop = ENOMEM;
- return NSS_STATUS_TRYAGAIN;
- }
- goto morebuf;
- }
- } while (__nss_next(&nip, fct_name, &fct.ptr, status, 0) == 0);
+ const struct walk_nss w = {
+ .lookup = &__nss_group_lookup, .fct_name = "getgrgid_r",
+ .status = &status, .errnop = errnop, .buf = &buf, .buflen = &buflen
+ };
+ const __typeof__(&_nss_nonlocal_getgrgid_r) self = &_nss_nonlocal_getgrgid_r;
+#define args (gid, &gbuf, buf, buflen, errnop)
+#include "walk_nss.h"
+#undef args
if (status == NSS_STATUS_SUCCESS) {
syslog(LOG_DEBUG, "nss_nonlocal: removing local group %u (%s) from non-local user %s\n", gbuf.gr_gid, gbuf.gr_name, user);
+ free(buf);
status = NSS_STATUS_NOTFOUND;
} else if (status != NSS_STATUS_TRYAGAIN) {
status = NSS_STATUS_SUCCESS;
}
- free(buf);
return status;
}
enum nss_status
get_local_group(const char *name, struct group *grp, char **buffer, int *errnop)
{
- static const char *fct_name = "getgrnam_r";
- static service_user *startp = NULL;
- static void *fct_start = NULL;
enum nss_status status;
- service_user *nip;
- union {
- enum nss_status (*l)(const char *name, struct group *grp,
- char *buffer, size_t buflen, int *errnop);
- void *ptr;
- } fct;
- size_t buflen;
- int old_errno = errno;
-
- buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
- *buffer = malloc(buflen);
- errno = old_errno;
- if (*buffer == NULL) {
- *errnop = ENOMEM;
- return NSS_STATUS_TRYAGAIN;
- }
-
- if (fct_start == NULL &&
- __nss_group_lookup(&startp, fct_name, &fct_start) != 0) {
- free(*buffer);
- *buffer = NULL;
- return NSS_STATUS_UNAVAIL;
- }
- nip = startp;
- fct.ptr = fct_start;
- do {
- morebuf:
- if (fct.l == _nss_nonlocal_getgrnam_r)
- status = NSS_STATUS_NOTFOUND;
- else
- status = DL_CALL_FCT(fct.l, (name, grp, *buffer, buflen, errnop));
- if (status == NSS_STATUS_TRYAGAIN && *errnop == ERANGE) {
- free(*buffer);
- buflen *= 2;
- *buffer = malloc(buflen);
- errno = old_errno;
- if (*buffer == NULL) {
- *errnop = ENOMEM;
- return NSS_STATUS_TRYAGAIN;
- }
- goto morebuf;
- }
- } while (__nss_next(&nip, fct_name, &fct.ptr, status, 0) == 0);
-
- if (status != NSS_STATUS_SUCCESS) {
- free(*buffer);
- *buffer = NULL;
- }
-
+ size_t buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
+ const struct walk_nss w = {
+ .lookup = &__nss_group_lookup, .fct_name = "getgrnam_r",
+ .status = &status, .errnop = errnop, .buf = buffer, .buflen = &buflen
+ };
+ const __typeof__(&_nss_nonlocal_getgrnam_r) self = &_nss_nonlocal_getgrnam_r;
+#define args (name, grp, *buffer, buflen, errnop)
+#include "walk_nss.h"
+#undef args
return status;
}
-static service_user *grent_nip = NULL;
+static service_user *grent_startp, *grent_nip;
static void *grent_fct_start;
static union {
enum nss_status (*l)(struct group *grp, char *buffer, size_t buflen,
enum nss_status
_nss_nonlocal_setgrent(int stayopen)
{
- static const char *fct_name = "setgrent";
- static void *fct_start = NULL;
enum nss_status status;
- service_user *nip;
- union {
- enum nss_status (*l)(int stayopen);
- void *ptr;
- } fct;
-
- nip = nss_group_nonlocal_database();
- if (nip == NULL)
- return NSS_STATUS_UNAVAIL;
- if (fct_start == NULL)
- fct_start = __nss_lookup_function(nip, fct_name);
- fct.ptr = fct_start;
- do {
- if (fct.ptr == NULL)
- status = NSS_STATUS_UNAVAIL;
- else
- status = DL_CALL_FCT(fct.l, (stayopen));
- } while (__nss_next(&nip, fct_name, &fct.ptr, status, 0) == 0);
+ const struct walk_nss w = {
+ .lookup = &__nss_group_nonlocal_lookup, .fct_name = "setgrent",
+ .status = &status
+ };
+ const __typeof__(&_nss_nonlocal_setgrent) self = NULL;
+#define args (stayopen)
+#include "walk_nss.h"
+#undef args
if (status != NSS_STATUS_SUCCESS)
return status;
- grent_nip = nip;
if (grent_fct_start == NULL)
- grent_fct_start = __nss_lookup_function(nip, grent_fct_name);
+ __nss_group_nonlocal_lookup(&grent_startp, grent_fct_name,
+ &grent_fct_start);
+ grent_nip = grent_startp;
grent_fct.ptr = grent_fct_start;
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nonlocal_endgrent(void)
{
- static const char *fct_name = "endgrent";
- static void *fct_start = NULL;
enum nss_status status;
- service_user *nip;
- union {
- enum nss_status (*l)(void);
- void *ptr;
- } fct;
+ const struct walk_nss w = {
+ .lookup = &__nss_group_nonlocal_lookup, .fct_name = "endgrent",
+ .status = &status
+ };
+ const __typeof__(&_nss_nonlocal_endgrent) self = NULL;
grent_nip = NULL;
- nip = nss_group_nonlocal_database();
- if (nip == NULL)
- return NSS_STATUS_UNAVAIL;
- if (fct_start == NULL)
- fct_start = __nss_lookup_function(nip, fct_name);
- fct.ptr = fct_start;
- do {
- if (fct.ptr == NULL)
- status = NSS_STATUS_UNAVAIL;
- else
- status = DL_CALL_FCT(fct.l, ());
- } while (__nss_next(&nip, fct_name, &fct.ptr, status, 0) == 0);
+#define args ()
+#include "walk_nss.h"
+#undef args
return status;
}
_nss_nonlocal_getgrnam_r(const char *name, struct group *grp,
char *buffer, size_t buflen, int *errnop)
{
- static const char *fct_name = "getgrnam_r";
- static void *fct_start = NULL;
enum nss_status status;
- service_user *nip;
- union {
- enum nss_status (*l)(const char *name, struct group *grp,
- char *buffer, size_t buflen, int *errnop);
- void *ptr;
- } fct;
+ const struct walk_nss w = {
+ .lookup = &__nss_group_nonlocal_lookup, .fct_name = "getgrnam_r",
+ .status = &status, .errnop = errnop
+ };
+ const __typeof__(&_nss_nonlocal_getgrnam_r) self = NULL;
char *nonlocal_ignore = getenv(NONLOCAL_IGNORE_ENV);
if (nonlocal_ignore != NULL && nonlocal_ignore[0] != '\0')
return NSS_STATUS_UNAVAIL;
- nip = nss_group_nonlocal_database();
- if (nip == NULL)
- return NSS_STATUS_UNAVAIL;
- if (fct_start == NULL)
- fct_start = __nss_lookup_function(nip, fct_name);
- fct.ptr = fct_start;
- do {
- if (fct.ptr == NULL)
- status = NSS_STATUS_UNAVAIL;
- else
- status = DL_CALL_FCT(fct.l, (name, grp, buffer, buflen, errnop));
- if (status == NSS_STATUS_TRYAGAIN && *errnop == ERANGE)
- break;
- } while (__nss_next(&nip, fct_name, &fct.ptr, status, 0) == 0);
+#define args (name, grp, buffer, buflen, errnop)
+#include "walk_nss.h"
+#undef args
if (status != NSS_STATUS_SUCCESS)
return status;
_nss_nonlocal_getgrgid_r(gid_t gid, struct group *grp,
char *buffer, size_t buflen, int *errnop)
{
- static const char *fct_name = "getgrgid_r";
- static void *fct_start = NULL;
enum nss_status status;
- service_user *nip;
- union {
- enum nss_status (*l)(gid_t gid, struct group *grp,
- char *buffer, size_t buflen, int *errnop);
- void *ptr;
- } fct;
+ const struct walk_nss w = {
+ .lookup = &__nss_group_nonlocal_lookup, .fct_name = "getgrgid_r",
+ .status = &status, .errnop = errnop
+ };
+ const __typeof__(&_nss_nonlocal_getgrgid_r) self = NULL;
char *nonlocal_ignore = getenv(NONLOCAL_IGNORE_ENV);
if (nonlocal_ignore != NULL && nonlocal_ignore[0] != '\0')
return NSS_STATUS_UNAVAIL;
- nip = nss_group_nonlocal_database();
- if (nip == NULL)
- return NSS_STATUS_UNAVAIL;
- if (fct_start == NULL)
- fct_start = __nss_lookup_function(nip, fct_name);
- fct.ptr = fct_start;
- do {
- if (fct.ptr == NULL)
- status = NSS_STATUS_UNAVAIL;
- else
- status = DL_CALL_FCT(fct.l, (gid, grp, buffer, buflen, errnop));
- if (status == NSS_STATUS_TRYAGAIN && *errnop == ERANGE)
- break;
- } while (__nss_next(&nip, fct_name, &fct.ptr, status, 0) == 0);
+#define args (gid, grp, buffer, buflen, errnop)
+#include "walk_nss.h"
+#undef args
if (status != NSS_STATUS_SUCCESS)
return status;
long int *size, gid_t **groupsp, long int limit,
int *errnop)
{
- static const char *fct_name = "initgroups_dyn";
- static void *fct_start = NULL;
enum nss_status status;
- service_user *nip;
- union {
- enum nss_status (*l)(const char *user, gid_t group, long int *start,
- long int *size, gid_t **groupsp, long int limit,
- int *errnop);
- void *ptr;
- } fct;
+ const struct walk_nss w = {
+ .lookup = &__nss_group_nonlocal_lookup, .fct_name = "initgroups_dyn",
+ .status = &status, .errnop = errnop
+ };
+ const __typeof__(&_nss_nonlocal_initgroups_dyn) self = NULL;
struct group local_users_group, nonlocal_users_group;
gid_t local_users_gid, gid;
in = out = *start;
- nip = nss_group_nonlocal_database();
- if (nip == NULL)
- return NSS_STATUS_UNAVAIL;
- if (fct_start == NULL)
- fct_start = __nss_lookup_function(nip, fct_name);
- fct.ptr = fct_start;
-
- do {
- if (fct.ptr == NULL)
- status = NSS_STATUS_UNAVAIL;
- else
- status = DL_CALL_FCT(fct.l, (user, group, start, size, groupsp, limit, errnop));
- if (status == NSS_STATUS_TRYAGAIN && *errnop == ERANGE)
- break;
- } while (__nss_next(&nip, fct_name, &fct.ptr, status, 0) == 0);
+#define args (user, group, start, size, groupsp, limit, errnop)
+#include "walk_nss.h"
+#undef args
if (status != NSS_STATUS_SUCCESS)
return status;
andersk / nss_nonlocal.git / blobdiff