#include "nsswitch-internal.h"
#include "nonlocal.h"
+#define MAGIC_LOCAL_GR_BUFLEN (sysconf(_SC_GETGR_R_SIZE_MAX) + 7)
+
static service_user *
nss_group_nonlocal_database(void)
}
-static __thread int local_only = 0;
-
-enum nss_status
-local_getgrgid_r(gid_t gid, struct group *grp,
- char *buffer, size_t buflen, int *errnop)
-{
- int old_local_only = local_only;
- int old_errno = errno;
- int ret;
- errno = *errnop;
- local_only = 1;
-
- ret = getgrgid_r(gid, grp, buffer, buflen, &grp);
-
- local_only = old_local_only;
- *errnop = errno;
- errno = old_errno;
-
- if (grp != NULL)
- return NSS_STATUS_SUCCESS;
- else if (ret == 0)
- return NSS_STATUS_NOTFOUND;
- else
- return NSS_STATUS_TRYAGAIN;
-}
-
enum nss_status
check_nonlocal_gid(const char *user, gid_t gid, int *errnop)
{
- struct group local_grp;
- int local_errno = errno;
- enum nss_status local_status, status = NSS_STATUS_SUCCESS;
- int local_buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
- char *local_buffer = malloc(local_buflen);
- if (local_buffer == NULL) {
+ enum nss_status status = NSS_STATUS_SUCCESS;
+ struct group gbuf;
+ struct group *gbufp = &gbuf;
+ int ret;
+ int old_errno = errno;
+ int buflen = MAGIC_LOCAL_GR_BUFLEN;
+ char *buf = malloc(buflen);
+ if (buf == NULL) {
*errnop = ENOMEM;
- errno = local_errno;
+ errno = old_errno;
return NSS_STATUS_TRYAGAIN;
}
- local_errno = 0;
- local_status = local_getgrgid_r(gid, &local_grp, local_buffer,
- local_buflen, &local_errno);
- if (local_status == NSS_STATUS_SUCCESS) {
- syslog(LOG_WARNING, "nss_nonlocal: removing local group %u (%s) from non-local user %s\n", local_grp.gr_gid, local_grp.gr_name, user);
+ errno = 0;
+ ret = getgrgid_r(gid, gbufp, buf, buflen, &gbufp);
+ if (ret != 0) {
+ *errnop = old_errno;
+ status = NSS_STATUS_TRYAGAIN;
+ } else if (gbufp != NULL) {
+ syslog(LOG_WARNING, "nss_nonlocal: removing local group %u (%s) from non-local user %s\n", gbuf.gr_gid, gbuf.gr_name, user);
status = NSS_STATUS_NOTFOUND;
- } else if (local_status != NSS_STATUS_NOTFOUND &&
- local_status != NSS_STATUS_UNAVAIL) {
- *errnop = local_errno;
- status = local_status;
}
- free(local_buffer);
+ free(buf);
+ errno = old_errno;
return status;
}
void *ptr;
} fct;
- if (local_only == 1)
+ if (buflen == MAGIC_LOCAL_GR_BUFLEN)
return NSS_STATUS_UNAVAIL;
nip = nss_group_nonlocal_database();