about summary refs log tree commit diff
path: root/sunrpc/netname.c
diff options
context:
space:
mode:
Diffstat (limited to 'sunrpc/netname.c')
-rw-r--r--sunrpc/netname.c201
1 files changed, 201 insertions, 0 deletions
diff --git a/sunrpc/netname.c b/sunrpc/netname.c
new file mode 100644
index 0000000000..be6c2f2ae1
--- /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;
+}