diff options
Diffstat (limited to 'REORG.TODO/nis/nss_nis/nis-grp.c')
| -rw-r--r-- | REORG.TODO/nis/nss_nis/nis-grp.c | 359 |
1 files changed, 359 insertions, 0 deletions
diff --git a/REORG.TODO/nis/nss_nis/nis-grp.c b/REORG.TODO/nis/nss_nis/nis-grp.c new file mode 100644 index 0000000000..05b33920fc --- /dev/null +++ b/REORG.TODO/nis/nss_nis/nis-grp.c @@ -0,0 +1,359 @@ +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Thorsten Kukuk <kukuk@suse.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 <ctype.h> +#include <errno.h> +#include <grp.h> +#include <nss.h> +#include <string.h> +#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 grent +#define STRUCTURE group +#define EXTERN_PARSER +#include <nss/nss_files/files-parse.c> + +/* Protect global state against multiple changers */ +__libc_lock_define_initialized (static, lock) + +static bool_t new_start = 1; +static char *oldkey; +static int oldkeylen; +static intern_t intern; + + +static void +internal_nis_endgrent (void) +{ + new_start = 1; + if (oldkey != NULL) + { + free (oldkey); + oldkey = NULL; + oldkeylen = 0; + } + + struct response_t *curr = intern.start; + + while (curr != NULL) + { + struct response_t *last = curr; + curr = curr->next; + free (last); + } + + intern.next = intern.start = NULL; +} + + +enum nss_status +_nss_nis_endgrent (void) +{ + __libc_lock_lock (lock); + + internal_nis_endgrent (); + + __libc_lock_unlock (lock); + + return NSS_STATUS_SUCCESS; +} + + +enum nss_status +internal_nis_setgrent (void) +{ + /* We have to read all the data now. */ + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + struct ypall_callback ypcb; + + ypcb.foreach = _nis_saveit; + ypcb.data = (char *) &intern; + enum nss_status status = yperr2nss (yp_all (domain, "group.byname", &ypcb)); + + + /* Mark the last buffer as full. */ + if (intern.next != NULL) + intern.next->size = intern.offset; + + intern.next = intern.start; + intern.offset = 0; + + return status; +} + + +enum nss_status +_nss_nis_setgrent (int stayopen) +{ + enum nss_status result = NSS_STATUS_SUCCESS; + + __libc_lock_lock (lock); + + internal_nis_endgrent (); + + if (_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ) + result = internal_nis_setgrent (); + + __libc_lock_unlock (lock); + + return result; +} + + +static enum nss_status +internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen, + int *errnop) +{ + /* If we read the entire database at setpwent time we just iterate + over the data we have in memory. */ + bool batch_read = intern.start != NULL; + + char *domain = NULL; + if (!batch_read && __builtin_expect (yp_get_default_domain (&domain), 0)) + 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; + + if (batch_read) + { + struct response_t *bucket; + + handle_batch_read: + bucket = intern.next; + + if (__glibc_unlikely (intern.offset >= bucket->size)) + { + if (bucket->next == NULL) + return NSS_STATUS_NOTFOUND; + + /* We look at all the content in the current bucket. Go on + to the next. */ + bucket = intern.next = bucket->next; + intern.offset = 0; + } + + for (result = &bucket->mem[intern.offset]; isspace (*result); + ++result) + ++intern.offset; + + len = strlen (result); + } + else + { + int yperr; + + if (new_start) + { + /* Maybe we should read the database in one piece. */ + if ((_nsl_default_nss () & NSS_FLAG_SETENT_BATCH_READ) + && internal_nis_setgrent () == NSS_STATUS_SUCCESS + && intern.start != NULL) + { + batch_read = true; + goto handle_batch_read; + } + + yperr = yp_first (domain, "group.byname", &outkey, &keylen, + &result, &len); + } + else + yperr = yp_next (domain, "group.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 (__glibc_unlikely ((size_t) (len + 1) > buflen)) + { + if (!batch_read) + free (result); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + if (!batch_read) + free (result); + + parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen, + errnop); + if (__glibc_unlikely (parse_res == -1)) + { + if (!batch_read) + free (outkey); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + if (batch_read) + intern.offset += len + 1; + else + { + free (oldkey); + oldkey = outkey; + oldkeylen = keylen; + new_start = 0; + } + } + while (parse_res < 1); + + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_nis_getgrent_r (struct group *result, char *buffer, size_t buflen, + int *errnop) +{ + int status; + + __libc_lock_lock (lock); + + status = internal_nis_getgrent_r (result, buffer, buflen, errnop); + + __libc_lock_unlock (lock); + + return status; +} + +enum nss_status +_nss_nis_getgrnam_r (const char *name, struct group *grp, + char *buffer, size_t buflen, int *errnop) +{ + if (name == NULL) + { + *errnop = EINVAL; + return NSS_STATUS_UNAVAIL; + } + + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + char *result; + int len; + int yperr = yp_match (domain, "group.byname", name, strlen (name), &result, + &len); + + 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 + 1) > buflen)) + { + free (result); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + free (result); + + int parse_res = _nss_files_parse_grent (p, grp, (void *) buffer, buflen, + errnop); + if (__builtin_expect (parse_res < 1, 0)) + { + if (parse_res == -1) + return NSS_STATUS_TRYAGAIN; + else + return NSS_STATUS_NOTFOUND; + } + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_nis_getgrgid_r (gid_t gid, struct group *grp, + char *buffer, size_t buflen, int *errnop) +{ + char *domain; + if (__glibc_unlikely (yp_get_default_domain (&domain))) + return NSS_STATUS_UNAVAIL; + + char buf[32]; + int nlen = sprintf (buf, "%lu", (unsigned long int) gid); + + char *result; + int len; + int yperr = yp_match (domain, "group.bygid", buf, nlen, &result, &len); + + 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 + 1) > buflen)) + { + free (result); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + char *p = strncpy (buffer, result, len); + buffer[len] = '\0'; + while (isspace (*p)) + ++p; + free (result); + + int parse_res = _nss_files_parse_grent (p, grp, (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; +} |