276 lines
6.7 KiB
C
276 lines
6.7 KiB
C
/*****************************************************************************
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*
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* $Id$
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* Purpose ...............: MBSE BBS Shadow Password Suite
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* Original Source .......: Shadow Password Suite
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* Original Copyright ....: Julianne Frances Haugh and others.
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*
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*****************************************************************************
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* Copyright (C) 1997-2001
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*****************************************************************************/
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/*
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* Separated from setup.c. --marekm
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*/
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#include "../config.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <syslog.h>
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#include "mblogin.h"
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#include <pwd.h>
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#include "getdef.h"
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#include "xmalloc.h"
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#include "env.h"
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#include "setupenv.h"
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void addenv_path(const char *varname, const char *dirname, const char *filename)
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{
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char *buf;
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buf = xmalloc(strlen(dirname) + strlen(filename) + 2);
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sprintf(buf, "%s/%s", dirname, filename);
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addenv(varname, buf);
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free(buf);
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}
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void read_env_file(const char *filename)
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{
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FILE *fp;
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char buf[1024];
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char *cp, *name, *val;
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fp = fopen(filename, "r");
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if (!fp)
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return;
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while (fgets(buf, sizeof buf, fp) == buf) {
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cp = strrchr(buf, '\n');
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if (!cp)
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break;
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*cp = '\0';
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cp = buf;
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/* ignore whitespace and comments */
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while (*cp && isspace(*cp))
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cp++;
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if (*cp == '\0' || *cp == '#')
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continue;
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/*
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* ignore lines which don't follow the name=value format
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* (for example, the "export NAME" shell commands)
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*/
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name = cp;
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while (*cp && !isspace(*cp) && *cp != '=')
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cp++;
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if (*cp != '=')
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continue;
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/* NUL-terminate the name */
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*cp++ = '\0';
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val = cp;
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#if 0 /* XXX untested, and needs rewrite with fewer goto's :-) */
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/*
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(state, char_type) -> (state, action)
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state: unquoted, single_quoted, double_quoted, escaped, double_quoted_escaped
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char_type: normal, white, backslash, single, double
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action: remove_curr, remove_curr_skip_next, remove_prev, finish XXX
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*/
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no_quote:
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if (*cp == '\\') {
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/* remove the backslash */
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remove_char(cp);
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/* skip over the next character */
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if (*cp)
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cp++;
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goto no_quote;
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} else if (*cp == '\'') {
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/* remove the quote */
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remove_char(cp);
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/* now within single quotes */
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goto s_quote;
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} else if (*cp == '"') {
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/* remove the quote */
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remove_char(cp);
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/* now within double quotes */
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goto d_quote;
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} else if (*cp == '\0') {
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/* end of string */
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goto finished;
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} else if (isspace(*cp)) {
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/* unescaped whitespace - end of string */
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*cp = '\0';
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goto finished;
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} else {
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cp++;
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goto no_quote;
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}
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s_quote:
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if (*cp == '\'') {
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/* remove the quote */
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remove_char(cp);
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/* unquoted again */
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goto no_quote;
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} else if (*cp == '\0') {
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/* end of string */
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goto finished;
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} else {
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/* preserve everything within single quotes */
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cp++;
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goto s_quote;
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}
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d_quote:
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if (*cp == '\"') {
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/* remove the quote */
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remove_char(cp);
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/* unquoted again */
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goto no_quote;
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} else if (*cp == '\\') {
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cp++;
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/* if backslash followed by double quote, remove backslash
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else skip over the backslash and following char */
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if (*cp == '"')
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remove_char(cp - 1);
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else if (*cp)
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cp++;
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goto d_quote;
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} eise if (*cp == '\0') {
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/* end of string */
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goto finished;
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} else {
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/* preserve everything within double quotes */
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goto d_quote;
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}
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finished:
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#endif /* 0 */
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/*
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* XXX - should handle quotes, backslash escapes, etc.
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* like the shell does.
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*/
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addenv(name, val);
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}
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fclose(fp);
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}
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/*
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* change to the user's home directory
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* set the HOME, SHELL, MAIL, PATH, and LOGNAME or USER environmental
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* variables.
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*/
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void setup_env(struct passwd *info)
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{
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char *cp, *envf;
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/*
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* Change the current working directory to be the home directory
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* of the user. It is a fatal error for this process to be unable
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* to change to that directory. There is no "default" home
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* directory.
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*
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* We no longer do it as root - should work better on NFS-mounted
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* home directories. Some systems default to HOME=/, so we make
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* this a configurable option. --marekm
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*/
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if (chdir(info->pw_dir) == -1) {
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static char temp_pw_dir[] = "/";
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if (!getdef_bool("DEFAULT_HOME") || chdir("/") == -1) {
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fprintf(stderr, _("Unable to cd to \"%s\"\n"), info->pw_dir);
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syslog(LOG_WARNING, "unable to cd to `%s' for user `%s'\n", info->pw_dir, info->pw_name);
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closelog();
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exit (1);
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}
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puts(_("No directory, logging in with HOME=/"));
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info->pw_dir = temp_pw_dir;
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}
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/*
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* Create the HOME environmental variable and export it.
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*/
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addenv("HOME", info->pw_dir);
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/*
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* Create the SHELL environmental variable and export it.
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*/
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if (info->pw_shell == (char *) 0 || ! *info->pw_shell) {
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static char temp_pw_shell[] = "/bin/sh";
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info->pw_shell = temp_pw_shell;
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}
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addenv("SHELL", info->pw_shell);
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/*
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* Create the PATH environmental variable and export it.
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*/
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cp = getdef_str( info->pw_uid == 0 ? "ENV_SUPATH" : "ENV_PATH" );
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addenv(cp ? cp : "PATH=/bin:/usr/bin", NULL);
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/*
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* Export the user name. For BSD derived systems, it's "USER", for
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* all others it's "LOGNAME". We set both of them.
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*/
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addenv("USER", info->pw_name);
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addenv("LOGNAME", info->pw_name);
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/*
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* MAILDIR environment variable for Qmail
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*/
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if ((cp=getdef_str("QMAIL_DIR")))
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addenv_path("MAILDIR", info->pw_dir, cp);
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/*
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* Create the MAIL environmental variable and export it. login.defs
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* knows the prefix.
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*/
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if ((cp=getdef_str("MAIL_DIR")))
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addenv_path("MAIL", cp, info->pw_name);
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else if ((cp=getdef_str("MAIL_FILE")))
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addenv_path("MAIL", info->pw_dir, cp);
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else {
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#if defined(MAIL_SPOOL_FILE)
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addenv_path("MAIL", info->pw_dir, MAIL_SPOOL_FILE);
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#elif defined(MAIL_SPOOL_DIR)
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addenv_path("MAIL", MAIL_SPOOL_DIR, info->pw_name);
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#endif
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}
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/*
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* Read environment from optional config file. --marekm
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*/
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if ((envf = getdef_str("ENVIRON_FILE")))
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read_env_file(envf);
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}
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