2 * Copyright (c) 1995, the EUROPAGATE consortium (see below).
4 * The EUROPAGATE consortium members are:
6 * University College Dublin
7 * Danmarks Teknologiske Videnscenter
8 * An Chomhairle Leabharlanna
9 * Consejo Superior de Investigaciones Cientificas
11 * Permission to use, copy, modify, distribute, and sell this software and
12 * its documentation, in whole or in part, for any purpose, is hereby granted,
15 * 1. This copyright and permission notice appear in all copies of the
16 * software and its documentation. Notices of copyright or attribution
17 * which appear at the beginning of any file must remain unchanged.
19 * 2. The names of EUROPAGATE or the project partners may not be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
23 * 3. Users of this software (implementors and gateway operators) agree to
24 * inform the EUROPAGATE consortium of their use of the software. This
25 * information will be used to evaluate the EUROPAGATE project and the
26 * software, and to plan further developments. The consortium may use
27 * the information in later publications.
29 * 4. Users of this software agree to make their best efforts, when
30 * documenting their use of the software, to acknowledge the EUROPAGATE
31 * consortium, and the role played by the software in their work.
33 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
34 * EXPRESS, IMPLIED, OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
35 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
36 * IN NO EVENT SHALL THE EUROPAGATE CONSORTIUM OR ITS MEMBERS BE LIABLE
37 * FOR ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF
38 * ANY KIND, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
39 * OR PROFITS, WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND
40 * ON ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
41 * USE OR PERFORMANCE OF THIS SOFTWARE.
44 * Revision 1.6 1995/11/06 17:44:22 adam
45 * State reestablised when shell restarts. History of previous
48 * Revision 1.5 1995/11/06 10:51:15 adam
49 * End of response marker in response from wsh/wproto to wcgi.
50 * Shells are respawned when necessary.
52 * Revision 1.4 1995/11/02 16:35:37 adam
53 * Bug fixes and select on FIFOs in wcgi - doesn't really work!
55 * Revision 1.3 1995/10/31 16:56:24 adam
56 * Record presentation.
58 * Revision 1.2 1995/10/23 16:55:36 adam
59 * A lot of changes - really.
61 * Revision 1.1 1995/10/20 11:49:25 adam
62 * First version of www gateway.
72 #include <sys/types.h>
74 #include <sys/select.h>
77 #define DEADSTRING "Your database server has terminated. To reactivate \
78 the server, please reload the server's 'front page'."
83 #define CGIDIR "/usr/local/etc/httpd/cgi-bin"
85 static char *prog = "cgi";
87 static char serverp[256] = {'\0'};
88 static GW_DB gw_db = NULL;
90 static void fatal(char *p)
92 printf("Content-type: text/html\n\n<HTML><HEAD><TITLE>Server Failure</TITLE></HEAD>\n");
93 printf("<BODY>%s</BODY>\n", p);
101 static int spawn (char *sprog, int id)
107 sprintf (envstr, "GWID=%d", id);
109 sprintf(path, "%s/%s", CGIDIR, sprog);
113 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "fork");
118 gw_log (GW_LOG_DEBUG, prog, "execl %s", path);
119 execl (path, sprog, 0);
120 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "execl %s", path);
128 * NOTE: In the (perhaps odd) terminology used within this software,
129 * the 'server' is the present program, which is executed by the httpd
130 * server. The 'client' is the process running outside.
131 * Protocol is long(len)<serverfifo>\0<extrapath>\0<envvars>\0<INFO>\0
135 char clientp[256], tmp[256], *path_info, *p, *operation, *t;
137 int linein = -1, lineout, data, gw_id;
140 gw_log_file (GW_LOG_ALL, "/usr/local/etc/httpd/logs/egwcgi_log");
141 gw_log_level (GW_LOG_ALL);
142 gw_log (GW_LOG_STAT, prog, "Europagate www cgi server");
144 sprintf(tmp, "%s/%s", FIFOROOT, FIFODIR);
145 if (access(tmp, R_OK|W_OK) < 0 && mkdir(tmp, 0777) < 0)
147 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "Failed to create %s", tmp);
148 fatal("Internal error in server.");
150 sprintf(serverp, "%s/srv%d", tmp, getpid());
151 if (access(serverp, R_OK|W_OK) == 0)
153 if (unlink(serverp) < 0)
155 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog,
156 "Failed to delete stale fifo.");
157 fatal("Internal error in server.");
160 gw_log (GW_LOG_WARN, prog, "Removed stale server fifo.");
162 if (mkfifo(serverp, 0666 | S_IFIFO) < 0)
164 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "mkfifo(%s)", serverp);
165 fatal("Internal error in server.");
167 if (!(path_info = getenv("PATH_INFO")))
169 gw_log (GW_LOG_FATAL, prog, "Must set PATH_INFO.");
170 fatal("Internal error in server.");
172 operation = ++path_info;
173 while (*path_info && *path_info != '/')
176 *(path_info++) = '\0';
177 if (!(gw_db = gw_db_open ("user.db", 1)))
179 gw_log (GW_LOG_FATAL, prog, "gw_db_open");
182 if ((gw_id = atoi(operation)) <= 0)
187 gw_id = gw_db_seq_no (gw_db);
188 sprintf (gw_id_str, "%d", gw_id);
190 spawn(operation, gw_id);
191 r = gw_db_insert (gw_db, gw_id_str, strlen(gw_id_str)+1,
192 operation, strlen(operation)+1);
195 gw_log (GW_LOG_FATAL, prog, "gw_db_insert: %d", r);
199 gw_log (GW_LOG_DEBUG, prog, "Synchronizing with client");
200 if ((linein = open(serverp, O_RDONLY)) < 0)
202 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "open %s", serverp);
203 fatal("Internal error in server.");
205 if (read(linein, combuf, 2) < 2 || strcmp(combuf, "OK"))
207 gw_log (GW_LOG_FATAL, prog, "Failed to synchronize with client");
208 fatal("Internal error in server");
210 gw_log (GW_LOG_DEBUG, prog, "Synchronized");
212 sprintf(clientp, "%s/clt%d", tmp, gw_id);
213 gw_log (GW_LOG_DEBUG, prog, "Opening %s", clientp);
214 if ((lineout = open(clientp, O_WRONLY)) < 0)
221 sprintf (gw_id_str, "%d", gw_id);
222 r = gw_db_lookup (gw_db, gw_id_str, strlen(gw_id_str)+1,
223 &sprog, &sprog_size);
226 gw_log (GW_LOG_FATAL, prog, "gw_db_lookup %s", gw_id_str);
227 fatal("Internal error in server");
229 gw_log (GW_LOG_DEBUG|GW_LOG_ERRNO, prog, "open %s restart", clientp);
230 spawn (sprog, gw_id);
231 gw_log (GW_LOG_DEBUG, prog, "Synchronizing with client");
232 if ((linein = open(serverp, O_RDONLY)) < 0)
234 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "open %s", serverp);
235 fatal("Internal error in server");
237 if (read(linein, combuf, 2) < 2 || strcmp(combuf, "OK"))
239 gw_log (GW_LOG_FATAL, prog, "Failed to synchronize with client.");
240 fatal("Internal error in server");
242 gw_log (GW_LOG_DEBUG, prog, "Synchronized.");
243 if ((lineout = open(clientp, O_WRONLY)) < 0)
245 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "%s", clientp);
246 fatal("Internal error in server");
250 gw_log (GW_LOG_DEBUG, prog, "Decoding user data");
251 p = combuf + sizeof(data);
254 strcpy(p, path_info);
256 *(p++) = '\0'; /* no envvars tranferred at present */
257 if ((t = getenv("CONTENT_LENGTH")) && (data = atoi(t)) > 0)
259 if (read(0, p, data) < data)
261 gw_log (GW_LOG_FATAL, prog, "Failed to read input");
262 fatal("Internal error in server");
268 memcpy(combuf, &data, sizeof(data));
269 gw_log (GW_LOG_DEBUG, prog, "Writing data");
270 if (write(lineout, combuf, data) < data)
272 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "write");
273 fatal("Internal server error");
275 if (linein < 0 && (linein = open(serverp, O_RDONLY)) < 0)
277 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "open %s", serverp);
278 fatal("Internal error in server");
280 gw_log (GW_LOG_DEBUG, prog, "Reading response");
283 while ((data = read(linein, combuf, COMBUF)) > 0)
285 gw_log (GW_LOG_DEBUG, prog, "Got %d bytes", data);
286 if (write(1, combuf, data) < data)
288 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "write");
294 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "read");
299 fcntl (linein, F_SETFL, O_NONBLOCK);
310 FD_SET(linein, &s_input);
314 gw_log (GW_LOG_DEBUG, prog, "select");
315 r = select (linein + 1, &s_input, NULL, NULL, &t);
318 gw_log (GW_LOG_ERRNO|GW_LOG_FATAL, prog, "select");
321 if (r == 0 || FD_ISSET (linein, &s_input))
324 gw_log (GW_LOG_DEBUG, prog, "poll");
325 if ((data = read (linein, combuf, COMBUF)) > 0)
327 if (combuf[data-1] == '\0')
332 gw_log (GW_LOG_DEBUG, prog, "Got %d bytes", data);
333 if (data > 0 && write(1, combuf, data) < data)
335 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "write");
343 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, prog, "read");
346 gw_log (GW_LOG_DEBUG, prog, "poll read");
353 if (r > 0 && FD_ISSET (1, &s_input))
355 data = read (1, combuf, COMBUF);
358 gw_log (GW_LOG_DEBUG|GW_LOG_ERRNO, prog, "stdout closed");
363 gw_log (GW_LOG_DEBUG, prog, "stdout closed");
366 gw_log (GW_LOG_DEBUG, prog, "stdout got %d bytes", data);
370 gw_log (GW_LOG_DEBUG, prog, "Cleaning up.");