nscd/nscd_conf.c

   1 /* Copyright (c) 1998, 2000, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <ctype.h>
  21 #include <malloc.h>
  22 #include <pwd.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <libintl.h>
  27 #include <sys/param.h>
  28 #include <sys/types.h>
  29
  30 #include "dbg_log.h"
  31 #include "nscd.h"
  32
  33 /* Wrapper functions with error checking for standard functions.  */
  34 extern char *xstrdup (const char *s);
  35
  36
  37 /* Names of the databases.  */
  38 const char *dbnames[lastdb] =
  39 {
  40   [pwddb] = "passwd",
  41   [grpdb] = "group",
  42   [hstdb] = "hosts"
  43 };
  44
  45 int
  46 nscd_parse_file (const char *fname, struct database dbs[lastdb])
  47 {
  48   FILE *fp;
  49   char *line, *cp, *entry, *arg1, *arg2;
  50   size_t len;
  51   int cnt;
  52
  53   /* Open the configuration file.  */
  54   fp = fopen (fname, "r");
  55   if (fp == NULL)
  56     return -1;
  57
  58   line = NULL;
  59   len = 0;
  60
  61   do
  62     {
  63       ssize_t n = getline (&line, &len, fp);
  64       if (n < 0)
  65         break;
  66       if (line[n - 1] == '\n')
  67         line[n - 1] = '\0';
  68
  69       /* Because the file format does not know any form of quoting we
  70          can search forward for the next '#' character and if found
  71          make it terminating the line.  */
  72       *strchrnul (line, '#') = '\0';
  73
  74       /* If the line is blank it is ignored.  */
  75       if (line[0] == '\0')
  76         continue;
  77
  78       entry = line;
  79       while (isspace (*entry) && *entry != '\0')
  80         ++entry;
  81       cp = entry;
  82       while (!isspace (*cp) && *cp != '\0')
  83         ++cp;
  84       arg1 = cp;
  85       ++arg1;
  86       *cp = '\0';
  87       if (strlen (entry) == 0)
  88         dbg_log (_("Parse error: %s"), line);
  89       while (isspace (*arg1) && *arg1 != '\0')
  90         ++arg1;
  91       cp = arg1;
  92       while (!isspace (*cp) && *cp != '\0')
  93         ++cp;
  94       arg2 = cp;
  95       ++arg2;
  96       *cp = '\0';
  97       if (strlen (arg2) > 0)
  98         {
  99           while (isspace (*arg2) && *arg2 != '\0')
 100             ++arg2;
 101           cp = arg2;
 102           while (!isspace (*cp) && *cp != '\0')
 103             ++cp;
 104           *cp = '\0';
 105         }
 106
 107       if (strcmp (entry, "positive-time-to-live") == 0)
 108         {
 109           for (cnt = 0; cnt < lastdb; ++cnt)
 110             if (strcmp (arg1, dbnames[cnt]) == 0)
 111               {
 112                 dbs[cnt].postimeout = atol (arg2);
 113                 break;
 114               }
 115           if (cnt == lastdb)
 116             dbg_log ("server %s is not supported\n", arg1);
 117         }
 118       else if (strcmp (entry, "negative-time-to-live") == 0)
 119         {
 120           for (cnt = 0; cnt < lastdb; ++cnt)
 121             if (strcmp (arg1, dbnames[cnt]) == 0)
 122               {
 123                 dbs[cnt].negtimeout = atol (arg2);
 124                 break;
 125               }
 126           if (cnt == lastdb)
 127             dbg_log ("server %s is not supported\n", arg1);
 128         }
 129       else if (strcmp (entry, "suggested-size") == 0)
 130         {
 131           for (cnt = 0; cnt < lastdb; ++cnt)
 132             if (strcmp (arg1, dbnames[cnt]) == 0)
 133               {
 134                 dbs[cnt].module = atol (arg2);
 135                 break;
 136               }
 137           if (cnt == lastdb)
 138             dbg_log ("server %s is not supported\n", arg1);
 139         }
 140       else if (strcmp (entry, "enable-cache") == 0)
 141         {
 142           for (cnt = 0; cnt < lastdb; ++cnt)
 143             if (strcmp (arg1, dbnames[cnt]) == 0)
 144               {
 145                 if (strcmp (arg2, "no") == 0)
 146                   dbs[cnt].enabled = 0;
 147                 else if (strcmp (arg2, "yes") == 0)
 148                   dbs[cnt].enabled = 1;
 149                 break;
 150               }
 151           if (cnt == lastdb)
 152             dbg_log ("server %s is not supported\n", arg1);
 153         }
 154       else if (strcmp (entry, "check-files") == 0)
 155         {
 156           for (cnt = 0; cnt < lastdb; ++cnt)
 157             if (strcmp (arg1, dbnames[cnt]) == 0)
 158               {
 159                 if (strcmp (arg2, "no") == 0)
 160                   dbs[cnt].check_file = 0;
 161                 else if (strcmp (arg2, "yes") == 0)
 162                   dbs[cnt].check_file = 1;
 163                 break;
 164               }
 165           if (cnt == lastdb)
 166             dbg_log ("server %s is not supported\n", arg1);
 167         }
 168       else if (strcmp (entry, "logfile") == 0)
 169         {
 170           if (!set_logfile (arg1))
 171             dbg_log (_("Could not create log file \"%s\""), arg1);
 172         }
 173       else if (strcmp (entry, "debug-level") == 0)
 174         {
 175           int level = atoi (arg1);
 176           if (level > 0)
 177             debug_level = level;
 178         }
 179       else if (strcmp (entry, "threads") == 0)
 180         {
 181           if (nthreads == -1)
 182             nthreads = MAX (atol (arg1), lastdb);
 183         }
 184       else if (strcmp (entry, "server-user") == 0)
 185         {
 186           if (!arg1)
 187             dbg_log (_("Must specify user name for server-user option"));
 188           else
 189             server_user = xstrdup (arg1);
 190         }
 191       else if (strcmp (entry, "stat-user") == 0)
 192         {
 193           if (!arg1)
 194             dbg_log (_("Must specify user name for stat-user option"));
 195           else
 196             {
 197               stat_user = xstrdup (arg1);
 198
 199               struct passwd *pw = getpwnam (stat_user);
 200               if (pw != NULL)
 201                 stat_uid = pw->pw_uid;
 202             }
 203         }
 204       else
 205         dbg_log (_("Unknown option: %s %s %s"), entry, arg1, arg2);
 206     }
 207   while (!feof (fp));
 208
 209   /* Free the buffer.  */
 210   free (line);
 211   /* Close configuration file.  */
 212   fclose (fp);
 213
 214   return 0;
 215 }