diff options
Diffstat (limited to 'nis/nss_nisplus/nisplus-grp.c')
| -rw-r--r-- | nis/nss_nisplus/nisplus-grp.c | 194 |
1 files changed, 108 insertions, 86 deletions
diff --git a/nis/nss_nisplus/nisplus-grp.c b/nis/nss_nisplus/nisplus-grp.c index daca94fc87..423f7e7291 100644 --- a/nis/nss_nisplus/nisplus-grp.c +++ b/nis/nss_nisplus/nisplus-grp.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1997, 2001, 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 1997, 2001, 2002, 2003, 2005 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. @@ -17,6 +17,7 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <atomic.h> #include <nss.h> #include <grp.h> #include <ctype.h> @@ -28,31 +29,39 @@ #include "nss-nisplus.h" #include "nisplus-parser.h" + __libc_lock_define_initialized (static, lock); static nis_result *result; static unsigned long next_entry; static nis_name tablename_val; -static u_long tablename_len; +static size_t tablename_len; static enum nss_status _nss_create_tablename (int *errnop) { if (tablename_val == NULL) { - char buf [40 + strlen (nis_local_directory ())]; - char *p; + const char *local_dir = nis_local_directory (); + size_t local_dir_len = strlen (local_dir); + static const char prefix[] = "group.org_dir."; - p = __stpcpy (buf, "group.org_dir."); - p = __stpcpy (p, nis_local_directory ()); - tablename_val = __strdup (buf); + char *p = malloc (sizeof (prefix) + local_dir_len); if (tablename_val == NULL) { *errnop = errno; return NSS_STATUS_TRYAGAIN; } - tablename_len = strlen (tablename_val); + + memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1); + + tablename_len = sizeof (prefix) - 1 + local_dir_len; + + atomic_write_barrier (); + + tablename_val = p; } + return NSS_STATUS_SUCCESS; } @@ -60,16 +69,20 @@ static enum nss_status internal_setgrent (void) { enum nss_status status; - int err; - if (result) - nis_freeresult (result); - result = NULL; + if (result != NULL) + { + nis_freeresult (result); + result = NULL; + } next_entry = 0; if (tablename_val == NULL) - if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS) - return NSS_STATUS_UNAVAIL; + { + int err; + if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS) + return NSS_STATUS_UNAVAIL; + } result = nis_list (tablename_val, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); if (result == NULL) @@ -108,9 +121,11 @@ _nss_nisplus_endgrent (void) { __libc_lock_lock (lock); - if (result) - nis_freeresult (result); - result = NULL; + if (result != NULL) + { + nis_freeresult (result); + result = NULL; + } __libc_lock_unlock (lock); @@ -173,8 +188,12 @@ _nss_nisplus_getgrnam_r (const char *name, struct group *gr, if (tablename_val == NULL) { + __libc_lock_lock (lock); + enum nss_status status = _nss_create_tablename (errnop); + __libc_lock_unlock (lock); + if (status != NSS_STATUS_SUCCESS) return status; } @@ -184,47 +203,46 @@ _nss_nisplus_getgrnam_r (const char *name, struct group *gr, *errnop = EINVAL; return NSS_STATUS_NOTFOUND; } - else + + nis_result *result; + char buf[strlen (name) + 9 + tablename_len]; + int olderr = errno; + + snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val); + + result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); + + if (result == NULL) { - nis_result *result; - char buf[strlen (name) + 24 + tablename_len]; - int olderr = errno; + *errnop = ENOMEM; + return NSS_STATUS_TRYAGAIN; + } - sprintf (buf, "[name=%s],%s", name, tablename_val); + if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0)) + { + enum nss_status status = niserr2nss (result->status); - result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL); + nis_freeresult (result); + return status; + } - if (result == NULL) + parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen, errnop); + nis_freeresult (result); + if (__builtin_expect (parse_res < 1, 0)) + { + if (parse_res == -1) { - *errnop = ENOMEM; + *errnop = ERANGE; return NSS_STATUS_TRYAGAIN; } - if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) - { - enum nss_status status = niserr2nss (result->status); - - nis_freeresult (result); - return status; - } - - parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen, - errnop); - nis_freeresult (result); - if (parse_res < 1) + else { - if (parse_res == -1) - { - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - else - { - __set_errno (olderr); - return NSS_STATUS_NOTFOUND; - } + __set_errno (olderr); + return NSS_STATUS_NOTFOUND; } - return NSS_STATUS_SUCCESS; } + + return NSS_STATUS_SUCCESS; } enum nss_status @@ -233,53 +251,57 @@ _nss_nisplus_getgrgid_r (const gid_t gid, struct group *gr, { if (tablename_val == NULL) { + __libc_lock_lock (lock); + enum nss_status status = _nss_create_tablename (errnop); + __libc_lock_unlock (lock); + if (status != NSS_STATUS_SUCCESS) return status; } - { - int parse_res; - nis_result *result; - char buf[36 + tablename_len]; - int olderr = errno; + int parse_res; + nis_result *result; + char buf[8 + 3 * sizeof (unsigned long int) + tablename_len]; + int olderr = errno; - sprintf (buf, "[gid=%lu],%s", (unsigned long int) gid, tablename_val); + snprintf (buf, sizeof (buf), "[gid=%lu],%s", + (unsigned long int) gid, tablename_val); - result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); + result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL); - if (result == NULL) - { - *errnop = ENOMEM; - return NSS_STATUS_TRYAGAIN; - } - if (niserr2nss (result->status) != NSS_STATUS_SUCCESS) - { - enum nss_status status = niserr2nss (result->status); + if (result == NULL) + { + *errnop = ENOMEM; + return NSS_STATUS_TRYAGAIN; + } - __set_errno (olderr); + if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0)) + { + enum nss_status status = niserr2nss (result->status); - nis_freeresult (result); - return status; - } - - parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen, - errnop); - - nis_freeresult (result); - if (parse_res < 1) - { - __set_errno (olderr); - - if (parse_res == -1) - { - *errnop = ERANGE; - return NSS_STATUS_TRYAGAIN; - } - else - return NSS_STATUS_NOTFOUND; - } - return NSS_STATUS_SUCCESS; - } + __set_errno (olderr); + + nis_freeresult (result); + return status; + } + + parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen, errnop); + + nis_freeresult (result); + if (__builtin_expect (parse_res < 1, 0)) + { + __set_errno (olderr); + + if (parse_res == -1) + { + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + else + return NSS_STATUS_NOTFOUND; + } + + return NSS_STATUS_SUCCESS; } |