diff options
Diffstat (limited to 'nscd/nscd_getgr_r.c')
| -rw-r--r-- | nscd/nscd_getgr_r.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/nscd/nscd_getgr_r.c b/nscd/nscd_getgr_r.c new file mode 100644 index 0000000000..6739657e48 --- /dev/null +++ b/nscd/nscd_getgr_r.c @@ -0,0 +1,211 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1998. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <grp.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/socket.h> +#include <sys/un.h> + +#include "nscd.h" +#include "nscd_proto.h" + +static int __nscd_getgr_r (const char *key, request_type type, + struct group *resultbuf, char *buffer, + size_t buflen); + +int +__nscd_getgrnam_r (const char *name, struct group *resultbuf, char *buffer, + size_t buflen) +{ + if (name == NULL) + return 1; + + return __nscd_getgr_r (name, GETGRBYNAME, resultbuf, buffer, buflen); +} + +int +__nscd_getgrgid_r (gid_t gid, struct group *resultbuf, char *buffer, + size_t buflen) +{ + char *p = buffer; + char plen; + + plen = snprintf (buffer, buflen, "%d", gid); + if (plen == -1) + { + __set_errno (ERANGE); + return -1; + } + p = buffer + plen + 1; + + return __nscd_getgr_r (buffer, GETGRBYGID, resultbuf, p, buflen - plen -1); +} + +/* Create a socket connected to a name. */ +static int +nscd_open_socket (void) +{ + struct sockaddr_un addr; + int sock; + + sock = socket (PF_UNIX, SOCK_STREAM, 0); + if (sock < 0) + return -1; + + addr.sun_family = AF_UNIX; + strcpy (addr.sun_path, _PATH_NSCDSOCKET); + if (connect (sock, (struct sockaddr *) &addr, sizeof (addr)) < 0) + { + close (sock); + return -1; + } + + return sock; +} + +static int +__nscd_getgr_r (const char *key, request_type type, struct group *resultbuf, + char *buffer, size_t buflen) +{ + int sock = nscd_open_socket (); + request_header req; + gr_response_header gr_resp; + ssize_t nbytes; + + if (sock == -1) + return 1; + + req.version = NSCD_VERSION; + req.type = type; + req.key_len = strlen (key); + nbytes = write (sock, &req, sizeof (request_header)); + if (nbytes != sizeof (request_header)) + { + close (sock); + return 1; + } + + nbytes = write (sock, key, req.key_len); + if (nbytes != req.key_len) + { + close (sock); + return 1; + } + + nbytes = read (sock, &gr_resp, sizeof (gr_response_header)); + if (nbytes != sizeof (gr_response_header)) + { + close (sock); + return 1; + } + + if (gr_resp.found == -1) + { + close (sock); + return 1; + } + + if (gr_resp.found == 1) + { + size_t i; + char *p = buffer; + + if (buflen < gr_resp.gr_name_len + 1) + { + __set_errno (ERANGE); + close (sock); + return -1; + } + resultbuf->gr_name = p; + p += gr_resp.gr_name_len + 1; + buflen -= (gr_resp.gr_name_len + 1); + nbytes = read (sock, resultbuf->gr_name, gr_resp.gr_name_len); + if (nbytes != gr_resp.gr_name_len) + { + close (sock); + return 1; + } + resultbuf->gr_name[gr_resp.gr_name_len] = '\0'; + + if (buflen < gr_resp.gr_passwd_len + 1) + { + __set_errno (ERANGE); + close (sock); + return -1; + } + resultbuf->gr_passwd = p; + p += gr_resp.gr_passwd_len + 1; + buflen -= (gr_resp.gr_passwd_len + 1); + nbytes = read (sock, resultbuf->gr_passwd, gr_resp.gr_passwd_len); + if (nbytes != gr_resp.gr_passwd_len) + { + close (sock); + return 1; + } + resultbuf->gr_passwd[gr_resp.gr_passwd_len] = '\0'; + + resultbuf->gr_gid = gr_resp.gr_gid; + + if (buflen < ((gr_resp.gr_mem_len + 1) * sizeof (char *))) + { + __set_errno (ERANGE); + close (sock); + return -1; + } + resultbuf->gr_mem = (char **)p; + p += ((gr_resp.gr_mem_len + 1) * sizeof (char *)); + buflen -= ((gr_resp.gr_mem_len + 1) * sizeof (char *)); + + resultbuf->gr_mem[gr_resp.gr_mem_len] = NULL; + + for (i = 0; i < gr_resp.gr_mem_len; ++i) + { + size_t len; + nbytes = read (sock, &len, sizeof (len)); + if (nbytes != sizeof (len)) + { + close (sock); + return 1; + } + + if (buflen < (len + 1)) + { + __set_errno (ERANGE); + close (sock); + return -1; + } + resultbuf->gr_mem[i] = p; + p += len + 1; + buflen -= (len + 1); + nbytes = read (sock, resultbuf->gr_mem[i], len); + resultbuf->gr_mem[i][len] = '\0'; + if (nbytes != len) + { + close (sock); + return 1; + } + } + } + close (sock); + return 0; +} |