diff options
Diffstat (limited to 'sunrpc/netname.c')
| -rw-r--r-- | sunrpc/netname.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/sunrpc/netname.c b/sunrpc/netname.c new file mode 100644 index 0000000..be6c2f2 --- /dev/null +++ b/sunrpc/netname.c @@ -0,0 +1,201 @@ +/* Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997. + + 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 <stdio.h> +#include <unistd.h> +#include <string.h> +#include <rpc/rpc.h> + +#include "nsswitch.h" + +#define OPSYS_LEN 4 +#define MAXIPRINT (11) /* max length of printed integer */ +static const char *OPSYS = "unix"; + +int +user2netname (char netname[MAXNETNAMELEN + 1], const uid_t uid, + const char *domain) +{ + char dfltdom[MAXNETNAMELEN + 1]; + size_t i; + + if (domain == NULL) + { + if (getdomainname (dfltdom, sizeof (dfltdom)) < 0) + return 0; + } + else + { + strncpy (dfltdom, domain, MAXNETNAMELEN); + dfltdom[MAXNETNAMELEN] = '\0'; + } + + if ((strlen (dfltdom) + OPSYS_LEN + 3 + MAXIPRINT) > (size_t) MAXNETNAMELEN) + return 0; + + sprintf (netname, "%s.%d@%s", OPSYS, uid, dfltdom); + i = strlen (netname); + if (netname[i - 1] == '.') + netname[i - 1] = '\0'; + return 1; +} + +int +host2netname (char netname[MAXNETNAMELEN + 1], const char *host, + const char *domain) +{ + char *p; + char hostname[MAXHOSTNAMELEN + 1]; + char domainname[MAXHOSTNAMELEN + 1]; + char *dot_in_host; + size_t i; + + netname[0] = '\0'; /* make null first (no need for memset) */ + + if (host == NULL) + gethostname (hostname, MAXHOSTNAMELEN); + else + { + strncpy (hostname, host, MAXHOSTNAMELEN); + hostname[MAXHOSTNAMELEN] = '\0'; + } + + dot_in_host = strchr (hostname, '.'); + if (domain == NULL) + { + p = dot_in_host; + if (p) + { + strncpy (domainname, p, MAXHOSTNAMELEN); + domainname[MAXHOSTNAMELEN] = '\0'; + } + else + { + domainname[0] = 0; + getdomainname (domainname, MAXHOSTNAMELEN); + } + } + else + { + strncpy (domainname, domain, MAXHOSTNAMELEN); + domainname[MAXHOSTNAMELEN] = '\0'; + } + + i = strlen (domainname); + if (i == 0) + /* No domainname */ + return 0; + if (domainname[i - 1] == '.') + domainname[i - 1] = 0; + + if (dot_in_host) /* strip off rest of name */ + *dot_in_host = '\0'; + + if ((strlen (domainname) + strlen (hostname) + OPSYS_LEN + 3) + > MAXNETNAMELEN) + return 0; + + sprintf (netname, "%s.%s@%s", OPSYS, hostname, domainname); + return 1; +} + +int +getnetname (char name[MAXNETNAMELEN + 1]) +{ + uid_t uid; + int dummy; + + uid = geteuid (); + if (uid == 0) + dummy = host2netname (name, NULL, NULL); + else + dummy = user2netname (name, uid, NULL); + return (dummy); +} + +/* Type of the lookup function for netname2user. */ +typedef int (*netname2user_function) (const char netname[MAXNETNAMELEN + 1], + uid_t *, gid_t *, int *, gid_t *); +/* The lookup function for the first entry of this service. */ +extern int __nss_publickey_lookup (service_user ** nip, const char *name, + void **fctp); + +int +netname2user (const char netname[MAXNETNAMELEN + 1], uid_t * uidp, gid_t * gidp, + int *gidlenp, gid_t * gidlist) +{ + static service_user *startp = NULL; + static netname2user_function start_fct; + service_user *nip; + netname2user_function fct; + enum nss_status status = NSS_STATUS_UNAVAIL; + int no_more; + + if (startp == NULL) + { + no_more = __nss_publickey_lookup (&nip, "netname2user", (void **) &fct); + if (no_more) + startp = (service_user *) - 1; + else + { + startp = nip; + start_fct = fct; + } + } + else + { + fct = start_fct; + no_more = (nip = startp) == (service_user *) - 1; + } + + while (!no_more) + { + status = (*fct) (netname, uidp, gidp, gidlenp, gidlist); + + no_more = __nss_next (&nip, "netname2user", (void **) &fct, status, 0); + } + + return status == NSS_STATUS_SUCCESS; +} + +int +netname2host (const char netname[MAXNETNAMELEN + 1], char *hostname, + const int hostlen) +{ + char *p1, *p2; + char buffer[MAXNETNAMELEN + 1]; + + p1 = strchr (buffer, '.'); + if (p1 == NULL) + return 0; + p1++; + + p2 = strchr (p1, '@'); + if (p2 == NULL) + return 0; + *p2 = '\0'; + + if (hostlen > MAXNETNAMELEN) + return 0; + + strncpy (hostname, p1, hostlen); + hostname[hostlen] = '\0'; + + return 1; +} |