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-rw-r--r--nis/nss_nis/nis-grp.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/nis/nss_nis/nis-grp.c b/nis/nss_nis/nis-grp.c
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index 0000000000..1bab862c2f
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+++ b/nis/nss_nis/nis-grp.c
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+/* Copyright (C) 1996 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
+
+   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 <nss.h>
+#include <grp.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <libc-lock.h>
+#include <rpcsvc/yp.h>
+#include <rpcsvc/ypclnt.h>
+
+#include "nss-nis.h"
+
+/* Protect global state against multiple changers */
+__libc_lock_define_initialized (static, lock)
+
+static bool_t new_start = 1;
+static char *oldkey = NULL;
+static int oldkeylen = 0;
+
+enum nss_status
+_nss_nis_setgrent (void)
+{
+  __libc_lock_lock (lock);
+
+  new_start = 1;
+  if (oldkey != NULL)
+    {
+      free (oldkey);
+      oldkey = NULL;
+      oldkeylen = 0;
+    }
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_endgrent (void)
+{
+  __libc_lock_lock (lock);
+
+  new_start = 1;
+  if (oldkey != NULL)
+    {
+      free (oldkey);
+      oldkey = NULL;
+      oldkeylen = 0;
+    }
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+internal_nis_getgrent_r (struct group *grp, char *buffer, size_t buflen)
+{
+  char *domain, *result, *outkey;
+  int len, keylen, parse_res;
+
+  if (yp_get_default_domain (&domain))
+    return NSS_STATUS_UNAVAIL;
+
+  /* Get the next entry until we found a correct one. */
+  do
+    {
+      enum nss_status retval;
+      char *p;
+
+      if (new_start)
+        retval = yperr2nss (yp_first (domain, "group.byname",
+                                      &outkey, &keylen, &result, &len));
+      else
+        retval = yperr2nss ( yp_next (domain, "group.byname",
+                                      oldkey, oldkeylen,
+                                      &outkey, &keylen, &result, &len));
+
+      if (retval != NSS_STATUS_SUCCESS)
+        {
+          if (retval == NSS_STATUS_TRYAGAIN)
+            __set_errno (EAGAIN);
+          return retval;
+        }
+
+      if (len + 1 > buflen)
+        {
+          free (result);
+          __set_errno (ERANGE);
+          return NSS_STATUS_TRYAGAIN;
+        }
+
+      p = strncpy (buffer, result, len);
+      buffer[len] = '\0';
+      while (isspace (*p))
+        ++p;
+      free (result);
+
+      parse_res = _nss_files_parse_grent (p, grp, buffer, buflen);
+      if (!parse_res && errno == ERANGE)
+        return NSS_STATUS_TRYAGAIN;
+
+      free (oldkey);
+      oldkey = outkey;
+      oldkeylen = keylen;
+      new_start = 0;
+    }
+  while (!parse_res);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_getgrent_r (struct group *result, char *buffer, size_t buflen)
+{
+  int status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_nis_getgrent_r (result, buffer, buflen);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+enum nss_status
+_nss_nis_getgrnam_r (const char *name, struct group *grp,
+		     char *buffer, size_t buflen)
+{
+  enum nss_status retval;
+  char *domain, *result, *p;
+  int len, parse_res;
+
+  if (name == NULL)
+    {
+      __set_errno (EINVAL);
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  if (yp_get_default_domain (&domain))
+    return NSS_STATUS_UNAVAIL;
+
+  retval = yperr2nss (yp_match (domain, "group.byname", name,
+				strlen (name), &result, &len));
+
+  if (retval != NSS_STATUS_SUCCESS)
+    {
+      if (retval == NSS_STATUS_TRYAGAIN)
+        __set_errno (EAGAIN);
+      return retval;
+    }
+
+  if (len + 1 > buflen)
+    {
+      free (result);
+      __set_errno (ERANGE);
+      return NSS_STATUS_TRYAGAIN;
+    }
+
+  p = strncpy (buffer, result, len);
+  buffer[len] = '\0';
+  while (isspace (*p))
+    ++p;
+  free (result);
+
+  parse_res = _nss_files_parse_grent (p, grp, buffer, buflen);
+
+  if (!parse_res)
+    {
+      if (errno == ERANGE)
+        return NSS_STATUS_TRYAGAIN;
+      else
+        return NSS_STATUS_NOTFOUND;
+    }
+  else
+    return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_nis_getgrgid_r (gid_t gid, struct group *grp,
+		     char *buffer, size_t buflen)
+{
+  enum nss_status retval;
+  char *domain, *result, *p;
+  int len, nlen, parse_res;
+  char buf[32];
+
+  if (yp_get_default_domain (&domain))
+    return NSS_STATUS_UNAVAIL;
+
+  nlen = sprintf (buf, "%d", gid);
+
+  retval = yperr2nss (yp_match (domain, "group.bygid", buf,
+				nlen, &result, &len));
+
+  if (retval != NSS_STATUS_SUCCESS)
+    {
+      if (retval == NSS_STATUS_TRYAGAIN)
+        __set_errno (EAGAIN);
+      return retval;
+    }
+
+  if (len + 1 > buflen)
+    {
+      free (result);
+      __set_errno (ERANGE);
+      return NSS_STATUS_TRYAGAIN;
+    }
+
+  p = strncpy (buffer, result, len);
+  buffer[len] = '\0';
+  while (isspace (*p))
+    ++p;
+  free (result);
+
+  parse_res = _nss_files_parse_grent (p, grp, buffer, buflen);
+
+  if (!parse_res)
+    {
+      if (errno == ERANGE)
+        return NSS_STATUS_TRYAGAIN;
+      else
+        return NSS_STATUS_NOTFOUND;
+    }
+  else
+    return NSS_STATUS_SUCCESS;
+}