diff options
Diffstat (limited to 'REORG.TODO/hesiod/nss_hesiod/hesiod-grp.c')
| -rw-r--r-- | REORG.TODO/hesiod/nss_hesiod/hesiod-grp.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/REORG.TODO/hesiod/nss_hesiod/hesiod-grp.c b/REORG.TODO/hesiod/nss_hesiod/hesiod-grp.c new file mode 100644 index 0000000000..a04f530945 --- /dev/null +++ b/REORG.TODO/hesiod/nss_hesiod/hesiod-grp.c @@ -0,0 +1,262 @@ +/* Copyright (C) 1997-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997. + + 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 <hesiod.h> +#include <nss.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/param.h> + +/* Get the declaration of the parser function. */ +#define ENTNAME grent +#define STRUCTURE group +#define EXTERN_PARSER +#include <nss/nss_files/files-parse.c> + +enum nss_status +_nss_hesiod_setgrent (int stayopen) +{ + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_hesiod_endgrent (void) +{ + return NSS_STATUS_SUCCESS; +} + +static enum nss_status +lookup (const char *name, const char *type, struct group *grp, + char *buffer, size_t buflen, int *errnop) +{ + struct parser_data *data = (void *) buffer; + size_t linebuflen; + void *context; + char **list; + int parse_res; + size_t len; + int olderr = errno; + + if (hesiod_init (&context) < 0) + return NSS_STATUS_UNAVAIL; + + list = hesiod_resolve (context, name, type); + if (list == NULL) + { + int err = errno; + hesiod_end (context); + __set_errno (olderr); + return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL; + } + + linebuflen = buffer + buflen - data->linebuffer; + len = strlen (*list) + 1; + if (linebuflen < len) + { + hesiod_free_list (context, list); + hesiod_end (context); + *errnop = ERANGE; + return NSS_STATUS_TRYAGAIN; + } + + memcpy (data->linebuffer, *list, len); + hesiod_free_list (context, list); + hesiod_end (context); + + parse_res = _nss_files_parse_grent (buffer, grp, data, buflen, errnop); + if (parse_res < 1) + { + __set_errno (olderr); + return parse_res == -1 ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND; + } + + return NSS_STATUS_SUCCESS; +} + +enum nss_status +_nss_hesiod_getgrnam_r (const char *name, struct group *grp, + char *buffer, size_t buflen, int *errnop) +{ + return lookup (name, "group", grp, buffer, buflen, errnop); +} + +enum nss_status +_nss_hesiod_getgrgid_r (gid_t gid, struct group *grp, + char *buffer, size_t buflen, int *errnop) +{ + char gidstr[21]; /* We will probably never have a gid_t with more + than 64 bits. */ + + snprintf (gidstr, sizeof gidstr, "%d", gid); + + return lookup (gidstr, "gid", grp, buffer, buflen, errnop); +} + +static int +internal_gid_in_list (const gid_t *list, const gid_t g, long int len) +{ + while (len > 0) + { + if (*list == g) + return 1; + --len; + ++list; + } + return 0; +} + +static enum nss_status +internal_gid_from_group (void *context, const char *groupname, gid_t *group) +{ + char **grp_res; + enum nss_status status = NSS_STATUS_NOTFOUND; + + grp_res = hesiod_resolve (context, groupname, "group"); + if (grp_res != NULL && *grp_res != NULL) + { + char *p = *grp_res; + + /* Skip to third field. */ + while (*p != '\0' && *p != ':') + ++p; + if (*p != '\0') + ++p; + while (*p != '\0' && *p != ':') + ++p; + if (*p != '\0') + { + char *endp; + char *q = ++p; + long int val; + + while (*q != '\0' && *q != ':') + ++q; + + val = strtol (p, &endp, 10); + if (sizeof (gid_t) == sizeof (long int) || (gid_t) val == val) + { + *group = val; + if (endp == q && endp != p) + status = NSS_STATUS_SUCCESS; + } + } + hesiod_free_list (context, grp_res); + } + return status; +} + +enum nss_status +_nss_hesiod_initgroups_dyn (const char *user, gid_t group, long int *start, + long int *size, gid_t **groupsp, long int limit, + int *errnop) +{ + enum nss_status status = NSS_STATUS_SUCCESS; + char **list = NULL; + char *p; + void *context; + gid_t *groups = *groupsp; + int save_errno; + + if (hesiod_init (&context) < 0) + return NSS_STATUS_UNAVAIL; + + list = hesiod_resolve (context, user, "grplist"); + + if (list == NULL) + { + hesiod_end (context); + return errno == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL; + } + + save_errno = errno; + + p = *list; + while (*p != '\0') + { + char *endp; + char *q; + long int val; + + status = NSS_STATUS_NOTFOUND; + + q = p; + while (*q != '\0' && *q != ':' && *q != ',') + ++q; + + if (*q != '\0') + *q++ = '\0'; + + __set_errno (0); + val = strtol (p, &endp, 10); + /* Test whether the number is representable in a variable of + type `gid_t'. If not ignore the number. */ + if ((sizeof (gid_t) == sizeof (long int) || (gid_t) val == val) + && errno == 0) + { + if (*endp == '\0' && endp != p) + { + group = val; + status = NSS_STATUS_SUCCESS; + } + else + status = internal_gid_from_group (context, p, &group); + + if (status == NSS_STATUS_SUCCESS + && !internal_gid_in_list (groups, group, *start)) + { + if (__glibc_unlikely (*start == *size)) + { + /* 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)++] = group; + } + } + + p = q; + } + + __set_errno (save_errno); + + done: + hesiod_free_list (context, list); + hesiod_end (context); + + return NSS_STATUS_SUCCESS; +} |