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 1.11 1996/01/09 16:16:49 adam
45 * Port to OSF/1. Gif references moved from /gif/ to /egwgif/.
47 * Revision 1.10 1996/01/09 10:46:50 adam
48 * New defines: LOGDIR/EGWDIR/CGIDIR set in Makefile.
50 * Revision 1.9 1995/11/07 14:56:59 adam
51 * Work on search in multiple targets.
52 * New wtcl command: wlog.
53 * Optional timeout parameter to zwait.
55 * Revision 1.8 1995/11/06 17:44:22 adam
56 * State reestablised when shell restarts. History of previous
59 * Revision 1.7 1995/11/02 16:35:37 adam
60 * Bug fixes and select on FIFOs in wcgi - doesn't really work!
62 * Revision 1.6 1995/11/01 16:15:47 adam
63 * Better presentation of records. Query/set number persistent.
65 * Revision 1.5 1995/10/31 16:56:24 adam
66 * Record presentation.
68 * Revision 1.4 1995/10/31 10:03:53 adam
70 * New command implemented - aborts script.
72 * Revision 1.3 1995/10/30 17:35:18 adam
73 * New function zwait that waits for a variable change - due to i/o events
74 * that invoke callback routines.
76 * Revision 1.2 1995/10/27 17:30:16 adam
77 * First search request/response that works.
79 * Revision 1.1 1995/10/27 15:12:08 adam
80 * IrTcl incorporated in the gateway.
81 * Better separation of script types.
82 * Z39.50 gateway scripts entered.
90 #include <sys/types.h>
92 #include <sys/select.h>
102 static void *do_create (WCLIENT wcl, void *args);
103 static int do_exec (const char *fname, char *parms, void *mydata);
104 static int do_load (char *parms, void *mydata);
105 static int do_save (char *parms, void *mydata);
107 static struct w_interp_type w_interp_t = {
115 W_Interp_Type w_interp_irtcl = &w_interp_t;
118 static char *mod = "wirtcl";
127 static int events (struct tcl_info *p, char *waitVar, int tout);
129 static int proc_zwait_invoke (ClientData clientData, Tcl_Interp *interp,
130 int argc, char **argv)
132 struct tcl_info *p = (struct tcl_info*) clientData;
136 return events (p, argv[1], (argc == 3) ? atoi(argv[2]) : 0);
141 /* select(2) callbacks */
143 void (*r_handle)(ClientData);
144 void (*w_handle)(ClientData);
145 void (*x_handle)(ClientData);
148 #define MAX_CALLBACK 200
150 static struct callback callback_table[MAX_CALLBACK];
151 static int max_fd = 3; /* don't worry: it will grow... */
153 static void *do_create (WCLIENT wcl, void *args)
158 if (!(p = malloc (sizeof(*p))))
160 gw_log (GW_LOG_FATAL|GW_LOG_ERRNO, mod, "malloc: irtcl_info");
163 if (!(p->w_interp = w_interp_create (w_interp_tcl, wcl, NULL)))
165 gw_log (GW_LOG_FATAL, mod, "Cannot make Tcl_Interp");
169 p->interp = w_interp_tcl_get (p->w_interp);
170 if (Irtcl_Init(p->interp) == TCL_ERROR)
172 gw_log (GW_LOG_FATAL, mod, "Cannot make Irtcl_Interp");
175 log_init(LOG_ALL, "irtcl", LOGDIR "/irtcl_log");
176 /* initialize irtcl */
177 Tcl_CreateCommand (p->interp, "zwait", proc_zwait_invoke, p, NULL);
178 for (i=0; i<MAX_CALLBACK; i++)
180 callback_table[i].r_handle = NULL;
181 callback_table[i].w_handle = NULL;
182 callback_table[i].x_handle = NULL;
188 static int do_exec (const char *fname, char *parms, void *mydata)
190 struct tcl_info *p = mydata;
192 if ((r = w_interp_exec (p->w_interp, fname, parms)))
198 static int events (struct tcl_info *p, char *waitVar, int tout)
203 static fd_set fdset_tcl_r;
204 static fd_set fdset_tcl_w;
205 static fd_set fdset_tcl_x;
206 int fifo_in = p->wcl->linein;
207 if (fifo_in > max_fd)
211 if ((cp = Tcl_GetVar (p->interp, waitVar, 0)))
213 waitVarVal = malloc (strlen(cp)+1);
214 strcpy (waitVarVal, cp);
220 sprintf (msg, "Variable %s doesn't exist", waitVar);
221 gw_log (GW_LOG_WARN, mod, "%s", msg);
222 Tcl_AppendResult (p->interp, msg, NULL);
225 gw_log (GW_LOG_DEBUG, mod, "Waiting %s=%s", waitVar, waitVarVal);
228 struct timeval to, *top;
238 if (!(cp = Tcl_GetVar (p->interp, waitVar, 0)) ||
239 strcmp (cp, waitVarVal))
241 gw_log (GW_LOG_DEBUG, mod, "Changed to %s", cp);
242 Tcl_AppendResult (p->interp, cp, NULL);
246 FD_ZERO (&fdset_tcl_r);
247 FD_ZERO (&fdset_tcl_w);
248 FD_ZERO (&fdset_tcl_x);
250 for (r=0, i=0; i<=max_fd; i++)
252 if (callback_table[i].w_handle)
254 FD_SET (i, &fdset_tcl_w);
257 if (callback_table[i].r_handle)
259 FD_SET (i, &fdset_tcl_r);
262 if (callback_table[i].x_handle)
264 FD_SET (i, &fdset_tcl_x);
271 gw_log (GW_LOG_DEBUG, mod, "fifo select %d", fifo_in);
272 FD_SET (fifo_in, &fdset_tcl_r);
274 if ((r = select(max_fd+1, &fdset_tcl_r, &fdset_tcl_w,
275 &fdset_tcl_x, top)) < 0)
277 gw_log (GW_LOG_ERRNO|GW_LOG_FATAL, mod, "select");
282 gw_log (GW_LOG_DEBUG, mod, "timeout");
286 if (FD_ISSET (fifo_in, &fdset_tcl_r))
288 gw_log (GW_LOG_DEBUG, mod, "FIFO closed");
292 for (i=0; i<=max_fd; i++)
294 if (FD_ISSET (i, &fdset_tcl_r))
296 if (callback_table[i].r_handle);
297 (*callback_table[i].r_handle) (callback_table[i].obj);
299 if (FD_ISSET (i, &fdset_tcl_w))
301 if (callback_table[i].w_handle)
302 (*callback_table[i].w_handle) (callback_table[i].obj);
304 if (FD_ISSET (i, &fdset_tcl_x))
306 if (callback_table[i].x_handle)
307 (*callback_table[i].x_handle) (callback_table[i].obj);
315 void ir_select_add (int fd, void *obj)
317 callback_table[fd].obj = obj;
318 callback_table[fd].r_handle = ir_select_read;
319 callback_table[fd].w_handle = NULL;
320 callback_table[fd].x_handle = NULL;
325 void ir_select_add_write (int fd, void *obj)
327 callback_table[fd].w_handle = ir_select_write;
332 void ir_select_remove_write (int fd, void *obj)
334 callback_table[fd].w_handle = NULL;
337 void ir_select_remove (int fd, void *obj)
339 callback_table[fd].r_handle = NULL;
340 callback_table[fd].w_handle = NULL;
341 callback_table[fd].x_handle = NULL;
344 static int do_load (char *parms, void *mydata)
346 struct tcl_info *p = mydata;
348 return w_interp_load_state (p->w_interp, parms);
351 static int do_save (char *parms, void *mydata)
353 struct tcl_info *p = mydata;
355 return w_interp_save_state (p->w_interp, parms);