1 /* $NetBSD: cgi-bozo.c,v 1.56 2023/09/20 08:41:35 shm Exp $ */
2
3 /* $eterna: cgi-bozo.c,v 1.40 2011/11/18 09:21:15 mrg Exp $ */
4
5 /*
6 * Copyright (c) 1997-2021 Matthew R. Green
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer and
16 * dedication in the documentation and/or other materials provided
17 * with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 */
32
33 /* this code implements CGI/1.2 for bozohttpd */
34
35 #ifndef NO_CGIBIN_SUPPORT
36
37 #include <sys/param.h>
38 #include <sys/socket.h>
39
40 #include <ctype.h>
41 #include <errno.h>
42 #include <paths.h>
43 #include <signal.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <syslog.h>
47 #include <unistd.h>
48 #include <assert.h>
49
50 #include <netinet/in.h>
51
52 #include "bozohttpd.h"
53
54 #define CGIBIN_PREFIX "cgi-bin/"
55 #define CGIBIN_PREFIX_LEN (sizeof(CGIBIN_PREFIX)-1)
56
57 #ifndef USE_ARG
58 #define USE_ARG(x) /*LINTED*/(void)&(x)
59 #endif
60
61 /*
62 * given the file name, return a CGI interpreter
63 */
64 static const char *
content_cgihandler(bozohttpd_t * httpd,bozo_httpreq_t * request,const char * file)65 content_cgihandler(bozohttpd_t *httpd, bozo_httpreq_t *request,
66 const char *file)
67 {
68 bozo_content_map_t *map;
69
70 USE_ARG(request);
71 debug((httpd, DEBUG_FAT, "content_cgihandler: trying file %s", file));
72 map = bozo_match_content_map(httpd, file, 0);
73 if (map)
74 return map->cgihandler;
75 return NULL;
76 }
77
78 static int
parse_header(bozo_httpreq_t * request,const char * str,ssize_t len,char ** hdr_str,char ** hdr_val)79 parse_header(bozo_httpreq_t *request, const char *str, ssize_t len,
80 char **hdr_str, char **hdr_val)
81 {
82 struct bozohttpd_t *httpd = request->hr_httpd;
83 char *name, *value;
84
85 /* if the string passed is zero-length bail out */
86 if (*str == '\0')
87 return -1;
88
89 value = bozostrdup(httpd, request, str);
90
91 /* locate the ':' separator in the header/value */
92 name = bozostrnsep(&value, ":", &len);
93
94 if (NULL == name || -1 == len) {
95 free(value);
96 return -1;
97 }
98
99 /* skip leading space/tab */
100 while (*value == ' ' || *value == '\t')
101 len--, value++;
102
103 *hdr_str = name;
104 *hdr_val = value;
105
106 return 0;
107 }
108
109 /*
110 * handle parsing a CGI header output, transposing a Status: header
111 * into the HTTP reply (ie, instead of "200 OK").
112 */
113 static void
finish_cgi_output(bozohttpd_t * httpd,bozo_httpreq_t * request,int in,int nph)114 finish_cgi_output(bozohttpd_t *httpd, bozo_httpreq_t *request, int in, int nph)
115 {
116 char buf[BOZO_WRSZ];
117 char *str;
118 ssize_t len;
119 ssize_t rbytes;
120 SIMPLEQ_HEAD(, bozoheaders) headers;
121 bozoheaders_t *hdr, *nhdr;
122 int write_header, nheaders = 0;
123
124 /* much of this code is like bozo_read_request()'s header loop. */
125 SIMPLEQ_INIT(&headers);
126 write_header = nph == 0;
127 while (nph == 0 &&
128 (str = bozodgetln(httpd, in, &len, bozo_read)) != NULL) {
129 char *hdr_name, *hdr_value;
130
131 if (parse_header(request, str, len, &hdr_name, &hdr_value))
132 break;
133
134 /*
135 * The CGI 1.{1,2} spec both say that if the cgi program
136 * returns a `Status:' header field then the server MUST
137 * return it in the response. If the cgi program does
138 * not return any `Status:' header then the server should
139 * respond with 200 OK.
140 * The CGI 1.1 and 1.2 specification differ slightly on
141 * this in that v1.2 says that the script MUST NOT return a
142 * `Status:' header if it is returning a `Location:' header.
143 * For compatibility we are going with the CGI 1.1 behavior.
144 */
145 if (strcasecmp(hdr_name, "status") == 0) {
146 debug((httpd, DEBUG_OBESE,
147 "%s: writing HTTP header "
148 "from status %s ..", __func__, hdr_value));
149 bozo_printf(httpd, "%s %s\r\n", request->hr_proto,
150 hdr_value);
151 bozo_flush(httpd, stdout);
152 write_header = 0;
153 free(hdr_name);
154 break;
155 }
156
157 hdr = bozomalloc(httpd, sizeof *hdr);
158 hdr->h_header = hdr_name;
159 hdr->h_value = hdr_value;
160 SIMPLEQ_INSERT_TAIL(&headers, hdr, h_next);
161 nheaders++;
162 }
163
164 if (write_header) {
165 debug((httpd, DEBUG_OBESE,
166 "%s: writing HTTP header ..", __func__));
167 bozo_printf(httpd,
168 "%s 200 OK\r\n", request->hr_proto);
169 bozo_flush(httpd, stdout);
170 }
171
172 if (nheaders) {
173 debug((httpd, DEBUG_OBESE,
174 "%s: writing delayed HTTP headers ..", __func__));
175 SIMPLEQ_FOREACH_SAFE(hdr, &headers, h_next, nhdr) {
176 bozo_printf(httpd, "%s: %s\r\n", hdr->h_header,
177 hdr->h_value);
178 free(hdr->h_header);
179 free(hdr);
180 }
181 bozo_printf(httpd, "\r\n");
182 bozo_flush(httpd, stdout);
183 }
184
185 /* CGI programs should perform their own timeouts */
186 while ((rbytes = read(in, buf, sizeof buf)) > 0) {
187 ssize_t wbytes;
188
189 while (rbytes) {
190 wbytes = bozo_write(httpd, STDOUT_FILENO, buf,
191 (size_t)rbytes);
192 if (wbytes > 0)
193 rbytes -= wbytes;
194 else
195 bozoerr(httpd, 1,
196 "cgi output write failed: %s",
197 strerror(errno));
198 }
199 }
200 }
201
202 static void
append_index_html(bozohttpd_t * httpd,char ** url)203 append_index_html(bozohttpd_t *httpd, char **url)
204 {
205 *url = bozorealloc(httpd, *url,
206 strlen(*url) + strlen(httpd->index_html) + 1);
207 strcat(*url, httpd->index_html);
208 debug((httpd, DEBUG_NORMAL,
209 "append_index_html: url adjusted to `%s'", *url));
210 }
211
212 /* This function parse search-string according to section 4.4 of RFC3875 */
213 static char **
parse_search_string(bozo_httpreq_t * request,const char * query,size_t * args_len)214 parse_search_string(bozo_httpreq_t *request, const char *query, size_t *args_len)
215 {
216 struct bozohttpd_t *httpd = request->hr_httpd;
217 size_t i;
218 char *s, *str, **args;
219
220 *args_len = 0;
221
222 /* URI MUST not contain any unencoded '=' - RFC3875, section 4.4 */
223 if (strchr(query, '='))
224 return NULL;
225
226 str = bozostrdup(httpd, request, query);
227
228 /*
229 * there's no more arguments than '+' chars in the query string as it's
230 * the separator
231 */
232 *args_len = 1;
233 /* count '+' in str */
234 for (s = str; (s = strchr(s, '+')) != NULL; (*args_len)++)
235 s++;
236
237 args = bozomalloc(httpd, sizeof(*args) * (*args_len + 1));
238
239 args[0] = str;
240 args[*args_len] = NULL;
241 for (s = str, i = 1; (s = strchr(s, '+')) != NULL; i++) {
242 *s = '\0';
243 s++;
244 args[i] = s;
245 }
246
247 /*
248 * check if search-strings are valid:
249 *
250 * RFC3875, section 4.4:
251 *
252 * search-string = search-word *( "+" search-word )
253 * search-word = 1*schar
254 * schar = unreserved | escaped | xreserved
255 * xreserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "," |
256 * "$"
257 *
258 * section 2.3:
259 *
260 * hex = digit | "A" | "B" | "C" | "D" | "E" | "F" | "a" |
261 * "b" | "c" | "d" | "e" | "f"
262 * escaped = "%" hex hex
263 * unreserved = alpha | digit | mark
264 * mark = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"
265 *
266 * section 2.2:
267 *
268 * alpha = lowalpha | hialpha
269 * lowalpha = "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" |
270 * "i" | "j" | "k" | "l" | "m" | "n" | "o" | "p" |
271 * "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" |
272 * "y" | "z"
273 * hialpha = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" |
274 * "I" | "J" | "K" | "L" | "M" | "N" | "O" | "P" |
275 * "Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" |
276 * "Y" | "Z"
277 * digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" |
278 * "8" | "9"
279 */
280 #define UNRESERVED_CHAR "-_.!~*'()"
281 #define XRESERVED_CHAR ";/?:@&=,$"
282
283 for (i = 0; i < *args_len; i++) {
284 s = args[i];
285 /* search-word MUST have at least one schar */
286 if (*s == '\0')
287 goto parse_err;
288 while (*s) {
289 /* check if it's unreserved */
290 if (isalpha((unsigned char)*s) ||
291 isdigit((unsigned char)*s) ||
292 strchr(UNRESERVED_CHAR, *s)) {
293 s++;
294 continue;
295 }
296
297 /* check if it's escaped */
298 if (*s == '%') {
299 if (s[1] == '\0' || s[2] == '\0')
300 goto parse_err;
301 if (!isxdigit((unsigned char)s[1]) ||
302 !isxdigit((unsigned char)s[2]))
303 goto parse_err;
304 s += 3;
305 continue;
306 }
307
308 /* check if it's xreserved */
309
310 if (strchr(XRESERVED_CHAR, *s)) {
311 s++;
312 continue;
313 }
314
315 goto parse_err;
316 }
317 }
318
319 /* decode percent encoding */
320 for (i = 0; i < *args_len; i++) {
321 if (bozo_decode_url_percent(request, args[i]))
322 goto parse_err;
323 }
324
325 /* allocate each arg separately */
326 for (i = 0; i < *args_len; i++)
327 args[i] = bozostrdup(httpd, request, args[i]);
328 free(str);
329
330 return args;
331
332 parse_err:
333
334 free(str);
335 free(args);
336 *args_len = 0;
337
338 return NULL;
339
340 }
341
342 void
bozo_cgi_setbin(bozohttpd_t * httpd,const char * path)343 bozo_cgi_setbin(bozohttpd_t *httpd, const char *path)
344 {
345 httpd->cgibin = bozostrdup(httpd, NULL, path);
346 debug((httpd, DEBUG_OBESE, "cgibin (cgi-bin directory) is %s",
347 httpd->cgibin));
348 }
349
350 /* help build up the environ pointer */
351 void
bozo_setenv(bozohttpd_t * httpd,const char * env,const char * val,char ** envp)352 bozo_setenv(bozohttpd_t *httpd, const char *env, const char *val,
353 char **envp)
354 {
355 char *s1 = bozomalloc(httpd, strlen(env) + strlen(val) + 2);
356
357 strcpy(s1, env);
358 strcat(s1, "=");
359 strcat(s1, val);
360 debug((httpd, DEBUG_OBESE, "bozo_setenv: %s", s1));
361 *envp = s1;
362 }
363
364 /*
365 * Checks if the request has asked for a cgi-bin. Should only be called if
366 * cgibin is set. If it starts CGIBIN_PREFIX or has a ncontent handler,
367 * process the cgi, otherwise just return. Returns 0 if it did not handle
368 * the request.
369 */
370 int
bozo_process_cgi(bozo_httpreq_t * request)371 bozo_process_cgi(bozo_httpreq_t *request)
372 {
373 bozohttpd_t *httpd = request->hr_httpd;
374 char buf[BOZO_WRSZ];
375 char date[40];
376 bozoheaders_t *headp;
377 const char *type, *clen, *info, *cgihandler;
378 char *query, *s, *t, *path, *env, *command, *file, *url;
379 char **envp, **curenvp, **argv, **search_string_argv = NULL;
380 char **lastenvp;
381 char *uri;
382 size_t i, len, search_string_argc = 0;
383 ssize_t rbytes;
384 pid_t pid;
385 int envpsize, ix, nph;
386 int sv[2];
387
388 if (!httpd->cgibin && !httpd->process_cgi)
389 return 0;
390
391 #ifndef NO_USER_SUPPORT
392 if (request->hr_user && !httpd->enable_cgi_users)
393 return 0;
394 #endif /* !NO_USER_SUPPORT */
395
396 if (request->hr_oldfile && strcmp(request->hr_oldfile, "/") != 0)
397 uri = request->hr_oldfile;
398 else
399 uri = request->hr_file;
400
401 if (uri[0] == '/')
402 file = bozostrdup(httpd, request, uri);
403 else
404 bozoasprintf(httpd, &file, "/%s", uri);
405
406 if (request->hr_query && strlen(request->hr_query))
407 query = bozostrdup(httpd, request, request->hr_query);
408 else
409 query = NULL;
410
411 bozoasprintf(httpd, &url, "%s%s%s",
412 file,
413 query ? "?" : "",
414 query ? query : "");
415 debug((httpd, DEBUG_NORMAL, "%s: url `%s'", __func__, url));
416
417 path = NULL;
418 envp = NULL;
419 cgihandler = NULL;
420 command = NULL;
421 info = NULL;
422
423 len = strlen(url);
424
425 if (bozo_auth_check(request, url + 1))
426 goto out;
427
428 if (!httpd->cgibin ||
429 strncmp(url + 1, CGIBIN_PREFIX, CGIBIN_PREFIX_LEN) != 0) {
430 cgihandler = content_cgihandler(httpd, request, file + 1);
431 if (cgihandler == NULL) {
432 debug((httpd, DEBUG_FAT,
433 "%s: no handler, returning", __func__));
434 goto out;
435 }
436 if (len == 0 || file[len - 1] == '/')
437 append_index_html(httpd, &file);
438 debug((httpd, DEBUG_NORMAL, "%s: cgihandler `%s'",
439 __func__, cgihandler));
440 } else if (len - 1 == CGIBIN_PREFIX_LEN) /* url is "/cgi-bin/" */
441 append_index_html(httpd, &file);
442
443 /* RFC3875 sect. 4.4. - search-string support */
444 if (query != NULL) {
445 search_string_argv = parse_search_string(request, query,
446 &search_string_argc);
447 }
448
449 debug((httpd, DEBUG_NORMAL, "parse_search_string args no: %zu",
450 search_string_argc));
451 for (i = 0; i < search_string_argc; i++) {
452 debug((httpd, DEBUG_FAT,
453 "search_string[%zu]: `%s'", i, search_string_argv[i]));
454 }
455
456 argv = bozomalloc(httpd, sizeof(*argv) * (3 + search_string_argc));
457
458 ix = 0;
459 if (cgihandler) {
460 command = file + 1;
461 path = bozostrdup(httpd, request, cgihandler);
462 } else {
463 command = file + CGIBIN_PREFIX_LEN + 1;
464 if ((s = strchr(command, '/')) != NULL) {
465 info = bozostrdup(httpd, request, s);
466 *s = '\0';
467 }
468 path = bozomalloc(httpd,
469 strlen(httpd->cgibin) + 1 + strlen(command) + 1);
470 strcpy(path, httpd->cgibin);
471 strcat(path, "/");
472 strcat(path, command);
473 }
474
475 argv[ix++] = path;
476
477 /* copy search-string args */
478 for (i = 0; i < search_string_argc; i++)
479 argv[ix++] = search_string_argv[i];
480
481 argv[ix++] = NULL;
482 nph = strncmp(command, "nph-", 4) == 0;
483
484 type = request->hr_content_type;
485 clen = request->hr_content_length;
486
487 envpsize = 13 + request->hr_nheaders +
488 (info && *info ? 1 : 0) +
489 (query && *query ? 1 : 0) +
490 (type && *type ? 1 : 0) +
491 (clen && *clen ? 1 : 0) +
492 (request->hr_remotehost && *request->hr_remotehost ? 1 : 0) +
493 (request->hr_remoteaddr && *request->hr_remoteaddr ? 1 : 0) +
494 (cgihandler ? 1 : 0) +
495 bozo_auth_cgi_count(request) +
496 (request->hr_serverport && *request->hr_serverport ? 1 : 0);
497
498 debug((httpd, DEBUG_FAT,
499 "%s: path `%s', cmd `%s', info `%s', "
500 "query `%s', nph `%d', envpsize `%d'", __func__,
501 path, command, strornull(info),
502 strornull(query), nph, envpsize));
503
504 envp = bozomalloc(httpd, sizeof(*envp) * envpsize);
505 for (ix = 0; ix < envpsize; ix++)
506 envp[ix] = NULL;
507 curenvp = envp;
508 lastenvp = envp + envpsize;
509
510 SIMPLEQ_FOREACH(headp, &request->hr_headers, h_next) {
511 const char *s2;
512 env = bozomalloc(httpd, 6 + strlen(headp->h_header) + 1 +
513 strlen(headp->h_value));
514
515 t = env;
516 strcpy(t, "HTTP_");
517 t += strlen(t);
518 for (s2 = headp->h_header; *s2; t++, s2++)
519 if (islower((unsigned char)*s2))
520 *t = toupper((unsigned char)*s2);
521 else if (*s2 == '-')
522 *t = '_';
523 else
524 *t = *s2;
525 *t = '\0';
526 debug((httpd, DEBUG_OBESE, "setting header %s as %s = %s",
527 headp->h_header, env, headp->h_value));
528 bozo_setenv(httpd, env, headp->h_value, curenvp++);
529 free(env);
530 }
531
532 #ifndef _PATH_DEFPATH
533 #define _PATH_DEFPATH "/usr/bin:/bin"
534 #endif
535
536 bozo_setenv(httpd, "PATH", _PATH_DEFPATH, curenvp++);
537 bozo_setenv(httpd, "IFS", " \t\n", curenvp++);
538 bozo_setenv(httpd, "SERVER_NAME", BOZOHOST(httpd,request), curenvp++);
539 bozo_setenv(httpd, "GATEWAY_INTERFACE", "CGI/1.1", curenvp++);
540 bozo_setenv(httpd, "SERVER_PROTOCOL", request->hr_proto, curenvp++);
541 bozo_setenv(httpd, "REQUEST_METHOD", request->hr_methodstr, curenvp++);
542 bozo_setenv(httpd, "SCRIPT_NAME", file, curenvp++);
543 bozo_setenv(httpd, "SCRIPT_FILENAME", file + 1, curenvp++);
544 bozo_setenv(httpd, "SERVER_SOFTWARE", httpd->server_software,
545 curenvp++);
546 bozo_setenv(httpd, "REQUEST_URI", uri, curenvp++);
547 bozo_setenv(httpd, "DATE_GMT", bozo_http_date(date, sizeof(date)),
548 curenvp++);
549 /* RFC3875 section 4.1.7 says that QUERY_STRING MUST be defined. */
550 if (query && *query)
551 bozo_setenv(httpd, "QUERY_STRING", query, curenvp++);
552 else
553 bozo_setenv(httpd, "QUERY_STRING", "", curenvp++);
554 if (info && *info)
555 bozo_setenv(httpd, "PATH_INFO", info, curenvp++);
556 if (type && *type)
557 bozo_setenv(httpd, "CONTENT_TYPE", type, curenvp++);
558 if (clen && *clen)
559 bozo_setenv(httpd, "CONTENT_LENGTH", clen, curenvp++);
560 if (request->hr_serverport && *request->hr_serverport)
561 bozo_setenv(httpd, "SERVER_PORT", request->hr_serverport,
562 curenvp++);
563 if (request->hr_remotehost && *request->hr_remotehost)
564 bozo_setenv(httpd, "REMOTE_HOST", request->hr_remotehost,
565 curenvp++);
566 if (request->hr_remoteaddr && *request->hr_remoteaddr)
567 bozo_setenv(httpd, "REMOTE_ADDR", request->hr_remoteaddr,
568 curenvp++);
569 /*
570 * Apache does this when invoking content handlers, and PHP
571 * 5.3 requires it as a "security" measure.
572 */
573 if (cgihandler)
574 bozo_setenv(httpd, "REDIRECT_STATUS", "200", curenvp++);
575 bozo_auth_cgi_setenv(request, &curenvp);
576
577 debug((httpd, DEBUG_FAT, "%s: going exec %s with args:", __func__,
578 path));
579
580 for (i = 0; argv[i] != NULL; i++) {
581 debug((httpd, DEBUG_FAT, "%s: argv[%zu] = `%s'", __func__,
582 i, argv[i]));
583 }
584
585 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, sv) == -1)
586 bozoerr(httpd, 1, "child socketpair failed: %s",
587 strerror(errno));
588
589 *curenvp = 0;
590 assert(lastenvp > curenvp);
591
592 /*
593 * We create 2 procs: one to become the CGI, one read from
594 * the CGI and output to the network, and this parent will
595 * continue reading from the network and writing to the
596 * CGI procsss.
597 */
598 switch (fork()) {
599 case -1: /* eep, failure */
600 bozoerr(httpd, 1, "child fork failed: %s", strerror(errno));
601 /*NOTREACHED*/
602 case 0:
603 close(sv[0]);
604 dup2(sv[1], STDIN_FILENO);
605 dup2(sv[1], STDOUT_FILENO);
606 close(2);
607 close(sv[1]);
608 closelog();
609 bozo_daemon_closefds(httpd);
610
611 if (-1 == execve(path, argv, envp)) {
612 int saveerrno = errno;
613 bozo_http_error(httpd, 404, request,
614 "Cannot execute CGI");
615 /* don't log easy to trigger events */
616 if (saveerrno != ENOENT &&
617 saveerrno != EISDIR &&
618 saveerrno != EACCES)
619 bozoerr(httpd, 1, "child exec failed: %s: %s",
620 path, strerror(saveerrno));
621 _exit(1);
622 }
623 /* NOT REACHED */
624 bozoerr(httpd, 1, "child execve returned?!");
625 }
626
627 free(query);
628 free(file);
629 free(url);
630 for (i = 0; i < search_string_argc; i++)
631 free(search_string_argv[i]);
632 free(search_string_argv);
633
634 close(sv[1]);
635
636 /* parent: read from stdin (bozo_read()) write to sv[0] */
637 /* child: read from sv[0] (bozo_write()) write to stdout */
638 pid = fork();
639 if (pid == -1)
640 bozoerr(httpd, 1, "io child fork failed: %s", strerror(errno));
641 else if (pid == 0) {
642 /* child reader/writer */
643 close(STDIN_FILENO);
644 finish_cgi_output(httpd, request, sv[0], nph);
645 /* if we do SSL, send a SSL_shutdown now */
646 bozo_ssl_shutdown(request->hr_httpd);
647 /* if we're done output, our parent is useless... */
648 kill(getppid(), SIGKILL);
649 debug((httpd, DEBUG_FAT, "done processing cgi output"));
650 _exit(0);
651 }
652 close(STDOUT_FILENO);
653
654 /* CGI programs should perform their own timeouts */
655 while ((rbytes = bozo_read(httpd, STDIN_FILENO, buf, sizeof buf)) > 0) {
656 ssize_t wbytes;
657
658 while (rbytes) {
659 wbytes = write(sv[0], buf, (size_t)rbytes);
660 if (wbytes > 0)
661 rbytes -= wbytes;
662 else
663 bozoerr(httpd, 1, "write failed: %s",
664 strerror(errno));
665 }
666 }
667 debug((httpd, DEBUG_FAT, "done processing cgi input"));
668 exit(0);
669
670 out:
671
672 for (i = 0; i < search_string_argc; i++)
673 free(search_string_argv[i]);
674 free(search_string_argv);
675 free(query);
676 free(file);
677 free(url);
678 return 0;
679 }
680
681 #ifndef NO_DYNAMIC_CONTENT
682 /* cgi maps are simple ".postfix /path/to/prog" */
683 void
bozo_add_content_map_cgi(bozohttpd_t * httpd,const char * arg,const char * cgihandler)684 bozo_add_content_map_cgi(bozohttpd_t *httpd, const char *arg,
685 const char *cgihandler)
686 {
687 bozo_content_map_t *map;
688
689 debug((httpd, DEBUG_NORMAL, "bozo_add_content_map_cgi: name %s cgi %s",
690 arg, cgihandler));
691
692 httpd->process_cgi = 1;
693
694 map = bozo_get_content_map(httpd, arg);
695 map->name = arg;
696 map->type = map->encoding = map->encoding11 = NULL;
697 map->cgihandler = cgihandler;
698 }
699 #endif /* NO_DYNAMIC_CONTENT */
700
701 #endif /* NO_CGIBIN_SUPPORT */
702