120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
/* $NetBSD: tilde-luzah-bozo.c,v 1.3 2008/03/03 22:15:09 mrg Exp $ */
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/* $eterna: tilde-luzah-bozo.c,v 1.5 2008/03/03 03:36:12 mrg Exp $ */
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/*
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* Copyright (c) 1997-2008 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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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 <errno.h>
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#include <pwd.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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#ifndef PUBLIC_HTML
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#define PUBLIC_HTML "public_html"
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#endif
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int uflag; /* allow /~user/ translation */
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const char *public_html = PUBLIC_HTML;
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/*
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* 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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*
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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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char *
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user_transform(request, isindex)
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http_req *request;
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int *isindex;
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{
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char c, *s, *file = NULL;
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struct passwd *pw;
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*isindex = 0;
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if ((s = strchr(request->hr_url + 2, '/')) != NULL) {
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*s++ = '\0';
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c = s[strlen(s)-1];
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*isindex = (c == '/' || c == '\0');
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}
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debug((DEBUG_OBESE, "looking for user %s", request->hr_url + 2));
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pw = getpwnam(request->hr_url + 2);
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/* fix this up immediately */
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if (s)
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s[-1] = '/';
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if (pw == NULL)
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http_error(404, request, "no such user");
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debug((DEBUG_OBESE, "user %s home dir %s uid %d gid %d", pw->pw_name,
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pw->pw_dir, pw->pw_uid, pw->pw_gid));
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if (chdir(pw->pw_dir) < 0) {
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warning("chdir1 error: %s: %s", pw->pw_dir, strerror(errno));
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http_error(403, request, "can't chdir to homedir");
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}
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if (chdir(public_html) < 0) {
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warning("chdir2 error: %s: %s", public_html, strerror(errno));
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http_error(403, request, "can't chdir to public_html");
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}
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if (s == NULL || *s == '\0') {
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file = bozostrdup(index_html);
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} else {
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file = bozomalloc(strlen(s) +
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(*isindex ? strlen(index_html) + 1 : 1));
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strcpy(file, s);
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if (*isindex)
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strcat(file, index_html);
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}
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/* see transform_request() */
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if (*file == '/' || strcmp(file, "..") == 0 ||
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strstr(file, "/..") || strstr(file, "../"))
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http_error(403, request, "illegal request");
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auth_check(request, file);
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debug((DEBUG_FAT, "transform_user returning %s under %s", file,
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pw->pw_dir));
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return (file);
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}
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#endif /* NO_USER_SUPPORT */
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