source: trunk/athena/bin/discuss/client/goto.c @ 22404

Revision 22404, 7.5 KB checked in by ghudson, 18 years ago (diff)
Eliminate declarations of system functions which cause warnings or errors. Fix some broken ss library calls.
Line 
1/*
2 *
3 *    Copyright (C) 1989 by the Massachusetts Institute of Technology
4 *    Developed by the MIT Student Information Processing Board (SIPB).
5 *    For copying information, see the file mit-copyright.h in this release.
6 *
7 */
8/*
9 *      $Id: goto.c,v 1.22 2006-03-10 07:11:31 ghudson Exp $
10 *
11 *      Code for "goto" request in discuss.
12 *
13 */
14
15#ifndef lint
16static char rcsid_discuss_c[] =
17    "$Id: goto.c,v 1.22 2006-03-10 07:11:31 ghudson Exp $";
18#endif /* lint */
19
20#include <stdio.h>
21#include <stdlib.h>
22#include <sys/file.h>
23#include <signal.h>
24#include <string.h>
25#include <sys/wait.h>
26#include <ctype.h>
27#include <ss/ss.h>
28#include <discuss/discuss.h>
29#include <time.h>
30#include "globals.h"
31
32#ifdef  lint
33#define DONT_USE(var)   var=var;
34#else   /* lint */
35#define DONT_USE(var)   ;
36#endif  /* lint */
37
38#define FREE(ptr)       { if (ptr) free(ptr); }
39#ifndef max
40#define max(a, b) ((a) > (b) ? (a) : (b))
41#endif
42
43extern ss_request_table discuss_cmds;
44
45/* EXTERNAL ROUTINES */
46
47tfile   unix_tfile();
48void    leave_mtg ();
49
50goto_mtg(argc, argv)
51    int argc;
52    char **argv;
53{
54    if (argc != 2) {
55        (void) fprintf(stderr, "Usage:  %s mtg_name\n", argv[0]);
56        return;
57    }
58   
59    switch_to_mtg(argv[1]);
60}
61
62switch_to_mtg(name)
63    char *name;
64{
65    int code;
66    name_blk nb;
67   
68    leave_mtg();
69   
70    dsc_get_mtg (user_id, name, &nb, &code);
71    if (code != 0) {
72        ss_perror(sci_idx, DISC_MTG_NOT_FOUND, name);
73        return;
74    }
75   
76    switch_to_mtg_nb (&nb);
77    dsc_destroy_name_blk (&nb);
78}
79
80switch_to_mtg_nb(nbp)
81    name_blk *nbp;
82{
83    int code, have_a, have_w, dummy;
84    char msgbuf[80],*old_hostname,*old_pathname;
85    trn_info t_info;
86   
87    /* Check to see if we're switching to same meeting. */
88    if (dsc_public.attending
89        && !strcmp(dsc_public.path, nbp->pathname)
90        && !strcmp(dsc_public.host, nbp ->hostname)) {
91        nbp -> date_attended = time((time_t *) 0);
92        nbp -> last = dsc_public.highest_seen;
93    }
94   
95    leave_mtg();
96   
97    dsc_copy_name_blk(nbp, &dsc_public.nb);
98    dsc_public.host = dsc_public.nb.hostname; /* warning - sharing */
99    dsc_public.path = dsc_public.nb.pathname;
100    dsc_get_mtg_info(&dsc_public.nb,
101                     &dsc_public.m_info, &code);
102    if (code != 0) {
103         while (code == MTG_MOVED) {
104              /* Meeting has moved.  In this case, dsc_public.m_info.long_name
105                 should contain the hostname/pathname for the meeting.
106                 We should update our information to reflect this change. */
107              old_hostname = dsc_public.nb.hostname;
108              dsc_public.nb.hostname = malloc(strlen(dsc_public.m_info.long_name)+1);
109              strcpy(dsc_public.nb.hostname, dsc_public.m_info.long_name);
110              old_pathname = dsc_public.nb.pathname;
111              dsc_public.nb.pathname = malloc(strlen(dsc_public.m_info.location)+1);
112              strcpy(dsc_public.nb.pathname, dsc_public.m_info.location);
113              dsc_public.host = dsc_public.nb.hostname; /* warning - sharing */
114              dsc_public.path = dsc_public.nb.pathname;
115              dsc_get_mtg_info(&dsc_public.nb,
116                               &dsc_public.m_info, &code);
117              if (code != 0 && code != MTG_MOVED) {
118                   fprintf(stderr, "Error checking moved meeting %s.  %s\n",
119                           dsc_public.nb.aliases[0], error_message(code));
120                   dsc_public.host = NULL;
121              } else {
122                   fprintf(stdout, "Warning: %s moved to %s:%s\n",
123                           dsc_public.nb.aliases[0], dsc_public.host, dsc_public.path);
124                   /* Delete old meeting */
125                   dsc_public.nb.hostname = old_hostname;
126                   dsc_public.nb.pathname = old_pathname;
127                   dsc_public.nb.status |= DSC_ST_DELETED;
128                   dsc_update_mtg_set(user_id, &dsc_public.nb, 1, &dummy);
129                   dsc_public.nb.status &= ~(DSC_ST_DELETED);
130                   free(dsc_public.nb.hostname);
131                   dsc_public.nb.hostname = dsc_public.host;
132                   free(dsc_public.nb.pathname);
133                   dsc_public.nb.pathname = dsc_public.path;
134              }
135         }
136         if (code != 0) {
137              if (code == NO_ACCESS)
138                   code = CANT_ATTEND;
139              (void) fprintf(stderr,
140                             "Error going to %s: %s\n",
141                             dsc_public.nb.aliases[0], error_message(code));
142              dsc_public.host = (char *)NULL;
143              return;
144         }
145    }
146   
147    dsc_public.mtg_name = (char *)malloc((unsigned)strlen(dsc_public.m_info.long_name)+1);
148    (void) strcpy(dsc_public.mtg_name, dsc_public.m_info.long_name);
149   
150    dsc_public.attending = TRUE;
151    dsc_public.highest_seen = dsc_public.current = dsc_public.nb.last;
152   
153    /* Check to see if meeting has been accidentally truncated */
154    if (dsc_public.highest_seen > dsc_public.m_info.highest) {
155        printf ("Warning:  Transactions appear to have been lost.\n");
156        dsc_public.highest_seen = dsc_public.current = 0;
157    }
158   
159    printf ("%s meeting:  %d new, %d last.",
160            dsc_public.m_info.long_name,
161            max (dsc_public.m_info.last - dsc_public.highest_seen, 0),
162            dsc_public.m_info.last);
163    if (acl_is_subset("c", dsc_public.m_info.access_modes))
164        strcpy(msgbuf, "you are a chairman");
165    else
166        msgbuf[0] = '\0';
167    have_w = acl_is_subset("w", dsc_public.m_info.access_modes);
168    have_a = acl_is_subset("a", dsc_public.m_info.access_modes);
169    if (have_w && have_a)
170        goto done;
171    if (msgbuf[0])
172        strcat(msgbuf, "; ");
173    if (!have_w)
174        strcat(msgbuf,
175               have_a ? "reply access only" : "read access only");
176    else
177        strcat(msgbuf, "no replies");
178done:
179    if (msgbuf[0]) {
180        /* the first character is currently lower-case */
181        msgbuf[0] = toupper (msgbuf[0]);
182        printf(" (%s.)", msgbuf);
183    }
184    printf("\n");
185   
186    /* See if our current transaction is deleted.  If so,
187     * rewind ourselves to the previous non-deleted transaction.
188     * Sigh.  This will be slow if there is a lot of deleted
189     * transactions.  Can you say "Forced to be like forum?" */
190    if (dsc_public.current == 0)
191        return;
192    if (dsc_public.current < dsc_public.m_info.first) {
193        /* don't fall off the ends */
194        dsc_public.current = dsc_public.m_info.first;
195    }
196    else if (dsc_public.current > dsc_public.m_info.last)
197        dsc_public.current = dsc_public.m_info.last;
198    else {
199        code = DELETED_TRN;
200        while (code == DELETED_TRN) {
201            dsc_get_trn_info (&dsc_public.nb, dsc_public.current,
202                              &t_info, &code);
203            dsc_destroy_trn_info(&t_info);
204            if (code == DELETED_TRN)
205                dsc_public.current--;
206            else if (code != 0) {
207                ss_perror(sci_idx, code,
208                          "Looking for non-deleted transaction");
209                break;
210            }
211        }                 
212    }
213}
214
215/*
216 *
217 * leave_mtg () -- Internal routine to leave the current meeting, updating
218 *                 all the stuff we need.  Not a light-weight operation.
219 *
220 */
221
222void leave_mtg()
223{
224    int code;
225    mtg_info minfo;
226
227    if (!dsc_public.attending)
228        return;                 /* bye, jack */
229    if (dsc_public.host == (char *)NULL) {
230        ss_perror (sci_idx, 0, "program error: meeting state inconsistent!");
231#ifdef DEBUG
232        fprintf (stderr, "leave_mtg: attending meeting, no host\n");
233        /* we should have some sort of debug mode... */
234        abort ();
235#endif
236        return;
237    }
238   
239    dsc_public.nb.date_attended = time((time_t *)0);
240    dsc_public.nb.last = dsc_public.highest_seen;
241    dsc_get_mtg_info (&dsc_public.nb, &minfo, &code);
242    if (!code) {
243        if (dsc_public.highest_seen == dsc_public.m_info.last)
244            dsc_public.nb.status &= ~ DSC_ST_CHANGED;
245    }
246    dsc_destroy_mtg_info (&minfo);
247    dsc_update_mtg_set (user_id, &dsc_public.nb, 1, &code);
248   
249    dsc_destroy_name_blk (&dsc_public.nb);
250   
251    /* done with everything.  start nuking stuff */
252    dsc_public.current = 0;
253    dsc_public.highest_seen = 0;
254    dsc_public.attending = FALSE;
255    dsc_public.host = (char *)NULL;
256    dsc_public.path = (char *)NULL;
257   
258    /* Don't forget the women and children... */
259    FREE (dsc_public.mtg_name);
260    dsc_public.mtg_name = (char *)NULL;
261   
262    dsc_destroy_mtg_info (&dsc_public.m_info);
263}
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