diff options
Diffstat (limited to 'grp/initgroups.c')
| -rw-r--r-- | grp/initgroups.c | 119 |
1 files changed, 24 insertions, 95 deletions
diff --git a/grp/initgroups.c b/grp/initgroups.c index 858dd31..9e79273 100644 --- a/grp/initgroups.c +++ b/grp/initgroups.c @@ -27,19 +27,14 @@ #include <sys/types.h> #include <nsswitch.h> +#include "../nscd/nscd-client.h" +#include "../nscd/nscd_proto.h" + + /* Type of the lookup function. */ typedef enum nss_status (*initgroups_dyn_function) (const char *, gid_t, long int *, long int *, gid_t **, long int, int *); -/* Prototype for the setgrent functions we use here. */ -typedef enum nss_status (*set_function) (void); - -/* Prototype for the endgrent functions we use here. */ -typedef enum nss_status (*end_function) (void); - -/* Prototype for the setgrent functions we use here. */ -typedef enum nss_status (*get_function) (struct group *, char *, - size_t, int *); /* The lookup function for the first entry of this service. */ extern int __nss_group_lookup (service_user **nip, const char *name, @@ -48,99 +43,29 @@ extern void *__nss_lookup_function (service_user *ni, const char *fct_name); extern service_user *__nss_group_database attribute_hidden; -static enum nss_status -compat_call (service_user *nip, const char *user, gid_t group, long int *start, - long int *size, gid_t **groupsp, long int limit, int *errnop) -{ - struct group grpbuf; - size_t buflen = __sysconf (_SC_GETGR_R_SIZE_MAX); - char *tmpbuf; - enum nss_status status; - set_function setgrent_fct; - get_function getgrent_fct; - end_function endgrent_fct; - gid_t *groups = *groupsp; - - getgrent_fct = __nss_lookup_function (nip, "getgrent_r"); - if (getgrent_fct == NULL) - return NSS_STATUS_UNAVAIL; - - setgrent_fct = __nss_lookup_function (nip, "setgrent"); - if (setgrent_fct) - { - status = DL_CALL_FCT (setgrent_fct, ()); - if (status != NSS_STATUS_SUCCESS) - return status; - } - endgrent_fct = __nss_lookup_function (nip, "endgrent"); +#include "compat-initgroups.c" - tmpbuf = __alloca (buflen); - - do - { - while ((status = DL_CALL_FCT (getgrent_fct, - (&grpbuf, tmpbuf, buflen, errnop)), - status == NSS_STATUS_TRYAGAIN) - && *errnop == ERANGE) - { - buflen *= 2; - tmpbuf = __alloca (buflen); - } - - if (status != NSS_STATUS_SUCCESS) - goto done; - - if (grpbuf.gr_gid != group) - { - char **m; - - for (m = grpbuf.gr_mem; *m != NULL; ++m) - if (strcmp (*m, user) == 0) - { - /* Matches user. Insert this group. */ - if (__builtin_expect (*start == *size, 0)) - { - /* Need a bigger buffer. */ - gid_t *newgroups; - long int newsize; - - if (limit > 0 && *size == limit) - /* We reached the maximum. */ - goto done; - - if (limit <= 0) - newsize = 2 * *size; - else - newsize = MIN (limit, 2 * *size); - - newgroups = realloc (groups, newsize * sizeof (*groups)); - if (newgroups == NULL) - goto done; - *groupsp = groups = newgroups; - *size = newsize; - } - - groups[*start] = grpbuf.gr_gid; - *start += 1; - - break; - } - } - } - while (status == NSS_STATUS_SUCCESS); - - done: - if (endgrent_fct) - DL_CALL_FCT (endgrent_fct, ()); - - return NSS_STATUS_SUCCESS; -} static int internal_getgrouplist (const char *user, gid_t group, long int *size, gid_t **groupsp, long int limit) { +#ifdef USE_NSCD + if (__nss_not_use_nscd_group > 0 + && ++__nss_not_use_nscd_group > NSS_NSCD_RETRY) + __nss_not_use_nscd_group = 0; + if (!__nss_not_use_nscd_group) + { + int n = __nscd_getgrouplist (user, group, size, groupsp, limit); + if (n >= 0) + return n; + + /* nscd is not usable. */ + __nss_not_use_nscd_group = 1; + } +#endif + service_user *nip = NULL; initgroups_dyn_function fct; enum nss_status status = NSS_STATUS_UNAVAIL; @@ -205,6 +130,10 @@ getgrouplist (const char *user, gid_t group, gid_t *groups, int *ngroups) newgroups = (gid_t *) malloc (size * sizeof (gid_t)); if (__builtin_expect (newgroups == NULL, 0)) /* No more memory. */ + // XXX This is wrong. The user provided memory, we have to use + // XXX it. The internal functions must be called with the user + // XXX provided buffer and not try to increase the size if it is + // XXX too small. For initgroups a flag could say: increase size. return -1; result = internal_getgrouplist (user, group, &size, &newgroups, -1); |