/***************************************************************************** * * $Id: getdef.c,v 1.4 2005/08/30 17:53:35 mbse Exp $ * Purpose ...............: MBSE BBS Shadow Password Suite * Original Source .......: Shadow Password Suite * Original Copyright ....: Julianne Frances Haugh and others. * ***************************************************************************** * Copyright (C) 1997-2005 * * Michiel Broek FIDO: 2:280/2802 * Beekmansbos 10 * 1971 BV IJmuiden * the Netherlands * * This file is part of MBSE BBS. * * This BBS is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * MBSE BBS 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 * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with MBSE BBS; see the file COPYING. If not, write to the Free * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *****************************************************************************/ #include "../config.h" #include #include #include #include #include #include #include #include "getdef.h" /* * A configuration item definition. */ struct itemdef { const char *name; /* name of the item */ char *value; /* value given, or NULL if no value */ }; /* * This list *must* be sorted by the "name" member. * It doesn't hurt that there are extra entries here * that are not known by the system this is running * on. Missing entries here gives a nasty message to * new bbs users. */ #define NUMDEFS (sizeof(def_table)/sizeof(def_table[0])) static struct itemdef def_table[] = { { "ALLOW_MBSE", NULL }, { "ASK_NEWUSER", NULL }, { "DEFAULT_HOME", NULL }, { "ENV_HZ", NULL }, { "ENV_PATH" , NULL }, { "ENV_TZ", NULL }, { "ERASECHAR", NULL }, { "FAIL_DELAY", NULL }, { "ISSUE_FILE", NULL }, { "KILLCHAR", NULL }, { "LASTLOG_ENAB", NULL }, { "LOGIN_RETRIES", NULL }, { "LOGIN_TIMEOUT", NULL }, { "LOG_OK_LOGINS", NULL }, { "LOG_UNKFAIL_ENAB", NULL }, { "MD5_CRYPT_ENAB", NULL }, { "NEWUSER_ACCOUNT", NULL }, { "NOLOGINS_FILE", NULL }, { "TTYGROUP", NULL }, { "TTYPERM", NULL }, { "ULIMIT", NULL }, { "UMASK", NULL }, { "USERGROUPS_ENAB", NULL }, }; static int def_loaded = 0; /* are defs already loaded? */ /* local function prototypes */ static struct itemdef *def_find (const char *); /* * getdef_str - get string value from table of definitions. * * Return point to static data for specified item, or NULL if item is not * defined. First time invoked, will load definitions from the file. */ char *getdef_str(const char *item) { struct itemdef *d; if (!def_loaded) def_load(); return ((d = def_find(item)) == NULL ? (char *)NULL : d->value); } /* * getdef_bool - get boolean value from table of definitions. * * Return TRUE if specified item is defined as "yes", else FALSE. */ int getdef_bool(const char *item) { struct itemdef *d; if (!def_loaded) def_load(); if ((d = def_find(item)) == NULL || d->value == NULL) return 0; return (strcmp(d->value, "yes") == 0); } /* * getdef_num - get numerical value from table of definitions * * Returns numeric value of specified item, else the "dflt" value if * the item is not defined. Octal (leading "0") and hex (leading "0x") * values are handled. */ int getdef_num(const char *item, int dflt) { struct itemdef *d; if (!def_loaded) def_load(); if ((d = def_find(item)) == NULL || d->value == NULL) return dflt; return (int) strtol(d->value, (char **)NULL, 0); } /* * getdef_long - get long integer value from table of definitions * * Returns numeric value of specified item, else the "dflt" value if * the item is not defined. Octal (leading "0") and hex (leading "0x") * values are handled. */ long getdef_long(const char *item, long dflt) { struct itemdef *d; if (!def_loaded) def_load(); if ((d = def_find(item)) == NULL || d->value == NULL) return dflt; return strtol(d->value, (char **)NULL, 0); } /* * def_find - locate named item in table * * Search through a sorted table of configurable items to locate the * specified configuration option. */ static struct itemdef *def_find(const char *name) { int min, max, curr, n; /* * Invariant - desired item in range [min:max]. */ min = 0; max = NUMDEFS-1; /* * Binary search into the table. Relies on the items being * sorted by name. */ while (min <= max) { curr = (min+max)/2; if (! (n = strcmp(def_table[curr].name, name))) return &def_table[curr]; if (n < 0) min = curr+1; else max = curr-1; } /* * Item was never found. */ fprintf(stderr, "getdef(): configuration error - unknown item '%s' (notify administrator)\r\n", name); syslog(LOG_CRIT, "getdef(): unknown configuration item `%s'", name); return (struct itemdef *) NULL; } /* * def_load - load configuration table * * Loads the user-configured options from the default configuration file */ void def_load(void) { int i; FILE *fp; struct itemdef *d; char buf[BUFSIZ], def_fname[PATH_MAX], *name, *value, *s; struct passwd *pw; /* * Get MBSE BBS root directory */ if ((pw = getpwnam("mbse")) == NULL) { syslog(LOG_CRIT, "cannot find user `mbse' in password file"); return; } snprintf(def_fname, PATH_MAX, "%s/etc/login.defs", pw->pw_dir); /* * Open the configuration definitions file. */ if ((fp = fopen(def_fname, "r")) == NULL) { syslog(LOG_CRIT, "cannot open login definitions %s [%m]", def_fname); return; } /* * Go through all of the lines in the file. */ while (fgets(buf, sizeof(buf), fp) != NULL) { /* * Trim trailing whitespace. */ for (i = strlen(buf)-1 ; i >= 0 ; --i) { if (!isspace(buf[i])) break; } buf[++i] = '\0'; /* * Break the line into two fields. */ name = buf + strspn(buf, " \t"); /* first nonwhite */ if (*name == '\0' || *name == '#') continue; /* comment or empty */ s = name + strcspn(name, " \t"); /* end of field */ if (*s == '\0') continue; /* only 1 field?? */ *s++ = '\0'; value = s + strspn(s, " \"\t"); /* next nonwhite */ *(value + strcspn(value, "\"")) = '\0'; /* * Locate the slot to save the value. If this parameter * is unknown then "def_find" will print an err message. */ if ((d = def_find(name)) == NULL) continue; /* * Save off the value. */ if ((d->value = strdup(value)) == NULL) { fprintf(stderr, "getdef: Could not allocate space for config info.\n"); syslog(LOG_ERR, "getdef: could not allocate space for config info"); break; } } (void) fclose(fp); /* * Set the initialized flag. */ ++def_loaded; } #ifdef CKDEFS int main(int argc, char **argv) { int i; char *cp; struct itemdef *d; def_load (); for (i = 0 ; i < NUMDEFS ; ++i) { if ((d = def_find(def_table[i].name)) == NULL) printf("error - lookup '%s' failed\n", def_table[i].name); else printf("%4d %-24s %s\n", i+1, d->name, d->value); } for (i = 1;i < argc;i++) { if (cp = getdef_str (argv[1])) printf ("%s `%s'\n", argv[1], cp); else printf ("%s not found\n", argv[1]); } exit(0); } #endif