diff options
Diffstat (limited to 'REORG.TODO/nis/nss_nis/nis-spwd.c')
| -rw-r--r-- | REORG.TODO/nis/nss_nis/nis-spwd.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/REORG.TODO/nis/nss_nis/nis-spwd.c b/REORG.TODO/nis/nss_nis/nis-spwd.c new file mode 100644 index 0000000000..45e9d964d2 --- /dev/null +++ b/REORG.TODO/nis/nss_nis/nis-spwd.c @@ -0,0 +1,235 @@ +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <nss.h> +#include <ctype.h> +#include <errno.h> +#include <string.h> +/* The following is an ugly trick to avoid a prototype declaration for + _nss_nis_endspent. */ +#define _nss_nis_endspent _nss_nis_endspent_XXX +#include <shadow.h> +#undef _nss_nis_endspent +#include <libc-lock.h> +#include <rpcsvc/yp.h> +#include <rpcsvc/ypclnt.h> + +#include "nss-nis.h" +#include <libnsl.h> + +/* Get the declaration of the parser function. */ +#define ENTNAME spent +#define STRUCTURE spwd +#define EXTERN_PARSER +#include <nss/nss_files/files-parse.c> + +/* Protect global state against multiple changers */ +__libc_lock_define_initialized (static, lock) + +static bool new_start = true; +static bool ent_adjunct_used; +static char *oldkey; +static int oldkeylen; + +enum nss_status +_nss_nis_setspent (int stayopen) +{ + __libc_lock_lock (lock); + + new_start = true; + ent_adjunct_used = false; + free (oldkey); + oldkey = NULL; + oldkeylen = 0; + + __libc_lock_unlock (lock); + + return NSS_STATUS_SUCCESS; +} +/* Make _nss_nis_endspent an alias of _nss_nis_setspent. We do this + even though the prototypes don't match. The argument of setspent + is not used so this makes no difference. */ +strong_alias (_nss_nis_setspent, _nss_nis_endspent) + +static enum nss_status +internal_nis_getspent_r (struct spwd *sp, char *buffer, size_t buflen, + int *errnop) +{ + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + /* Get the next entry until we found a correct one. */ + int parse_res; + do + { + char *result; + char *outkey; + int len; + int keylen; + int yperr; + + if (new_start) + { + yperr = yp_first (domain, "shadow.byname", &outkey, &keylen, &result, + &len); + if (__builtin_expect (yperr == YPERR_MAP, 0) + && (_nsl_default_nss () & NSS_FLAG_ADJUNCT_AS_SHADOW)) + { + free (result); + yperr = yp_first (domain, "passwd.adjunct.byname", &outkey, + &keylen, &result, &len); + ent_adjunct_used = true; + } + } + else + yperr = yp_next (domain, (ent_adjunct_used + ? "passwd.adjunct.byname" : "shadow.byname"), + oldkey, oldkeylen, &outkey, &keylen, &result, &len); + + if (__glibc_unlikely (yperr != YPERR_SUCCESS)) + { + enum nss_status retval = yperr2nss (yperr); + + if (retval == NSS_STATUS_TRYAGAIN) + *errnop = errno; + return retval; + } + + if (__builtin_expect ((size_t) (len + (ent_adjunct_used ? 3 : 1)) + > buflen, 0)) + { + free (result); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + if (ent_adjunct_used) + /* This is an ugly trick. The format of passwd.adjunct.byname almost + matches the shadow.byname format except that the last two fields + are missing. Synthesize them by marking them empty. */ + strcpy (&buffer[len], "::"); + else + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + free (result); + + parse_res = _nss_files_parse_spent (p, sp, (void *) buffer, buflen, + errnop); + if (__builtin_expect (parse_res == -1, 0)) + { + free (outkey); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + free (oldkey); + oldkey = outkey; + oldkeylen = keylen; + new_start = false; + } + while (!parse_res); + + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_nis_getspent_r (struct spwd *result, char *buffer, size_t buflen, + int *errnop) +{ + int status; + + __libc_lock_lock (lock); + + status = internal_nis_getspent_r (result, buffer, buflen, errnop); + + __libc_lock_unlock (lock); + + return status; +} + +enum nss_status +_nss_nis_getspnam_r (const char *name, struct spwd *sp, + char *buffer, size_t buflen, int *errnop) +{ + if (name == NULL) + { + *errnop = EINVAL; + return NSS_STATUS_UNAVAIL; + } + const size_t name_len = strlen (name); + + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + bool adjunct_used = false; + char *result; + int len; + int yperr = yp_match (domain, "shadow.byname", name, name_len, &result, + &len); + if (__builtin_expect (yperr == YPERR_MAP, 0) + && (_nsl_default_nss () & NSS_FLAG_ADJUNCT_AS_SHADOW)) + { + free (result); + yperr = yp_match (domain, "passwd.adjunct.byname", name, name_len, + &result, &len); + adjunct_used = true; + } + + if (__glibc_unlikely (yperr != YPERR_SUCCESS)) + { + enum nss_status retval = yperr2nss (yperr); + + if (retval == NSS_STATUS_TRYAGAIN) + *errnop = errno; + return retval; + } + + if (__glibc_unlikely ((size_t) (len + (adjunct_used ? 3 : 1)) > buflen)) + { + free (result); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + if (__builtin_expect (adjunct_used, false)) + /* This is an ugly trick. The format of passwd.adjunct.byname almost + matches the shadow.byname format except that the last two fields + are missing. Synthesize them by marking them empty. */ + strcpy (&buffer[len], "::"); + else + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + free (result); + + int parse_res = _nss_files_parse_spent (p, sp, (void *) buffer, buflen, + errnop); + if (__glibc_unlikely (parse_res < 1)) + { + if (parse_res == -1) + return NSS_STATUS_TRYAGAIN; + else + return NSS_STATUS_NOTFOUND; + } + return NSS_STATUS_SUCCESS; +} |