131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/* $NetBSD: tilde-luzah-bozo.c,v 1.14 2015/12/28 07:37:59 mrg Exp $ */
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/* $eterna: tilde-luzah-bozo.c,v 1.16 2011/11/18 09:21:15 mrg Exp $ */
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/*
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* Copyright (c) 1997-2014 Matthew R. Green
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer and
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* dedication in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/* this code implements ~user support for bozohttpd */
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#ifndef NO_USER_SUPPORT
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#include <sys/param.h>
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#include <assert.h>
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#include <errno.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "bozohttpd.h"
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/*
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* bozo_user_transform does this:
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* - chdir's /~user/public_html
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* - returns the rest of the file, index.html appended if required
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* - returned malloced file to serve in request->hr_file,
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* ala transform_request().
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*
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* transform_request() is supposed to check that we have user support
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* enabled.
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*/
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int
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bozo_user_transform(bozo_httpreq_t *request)
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{
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bozohttpd_t *httpd = request->hr_httpd;
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char *s, *file = NULL, *user;
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struct passwd *pw;
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/* find username */
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user = strchr(request->hr_file + 1, '~');
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/* this shouldn't happen, but "better paranoid than sorry" */
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assert(user != NULL);
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user++;
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if ((s = strchr(user, '/')) != NULL) {
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*s++ = '\0';
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}
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debug((httpd, DEBUG_OBESE, "looking for user %s",
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user));
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pw = getpwnam(user);
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request->hr_user = bozostrdup(httpd, request, user);
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/* fix this up immediately */
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if (s) {
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s[-1] = '/';
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/* omit additional slashes at the beginning */
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while (*s == '/')
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s++;
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}
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if (pw == NULL) {
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free(request->hr_user);
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request->hr_user = NULL;
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(void)bozo_http_error(httpd, 404, request, "no such user");
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return 0;
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}
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debug((httpd, DEBUG_OBESE, "user %s dir %s/%s uid %d gid %d",
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pw->pw_name, pw->pw_dir, httpd->public_html,
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pw->pw_uid, pw->pw_gid));
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if (chdir(pw->pw_dir) < 0) {
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bozowarn(httpd, "chdir1 error: %s: %s", pw->pw_dir,
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strerror(errno));
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(void)bozo_http_error(httpd, 404, request,
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"can't chdir to homedir");
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return 0;
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}
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if (chdir(httpd->public_html) < 0) {
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bozowarn(httpd, "chdir2 error: %s: %s", httpd->public_html,
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strerror(errno));
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(void)bozo_http_error(httpd, 404, request,
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"can't chdir to public_html");
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return 0;
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}
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if (s == NULL || *s == '\0') {
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file = bozostrdup(httpd, request, "/");
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} else {
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file = bozomalloc(httpd, strlen(s) + 2);
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strcpy(file, "/");
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strcat(file, s);
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}
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free(request->hr_file);
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request->hr_file = file;
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debug((httpd, DEBUG_FAT, "transform_user returning %s under %s", file,
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pw->pw_dir));
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return 1;
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}
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#endif /* NO_USER_SUPPORT */
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