1 /*
2 * Copyright 1987, 1988 by MIT Student Information Processing Board
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose is hereby granted, provided that
6 * the names of M.I.T. and the M.I.T. S.I.P.B. not be used in
7 * advertising or publicity pertaining to distribution of the software
8 * without specific, written prior permission. M.I.T. and the
9 * M.I.T. S.I.P.B. make no representations about the suitability of
10 * this software for any purpose. It is provided "as is" without
11 * express or implied warranty.
12 */
13 #include "config.h"
14 #include "ss_internal.h"
15 #include <signal.h>
16 #include <setjmp.h>
17 #include <sys/wait.h>
18
19 typedef void sigret_t;
20
ss_list_requests(int argc __SS_ATTR ((unused)),const char * const * argv __SS_ATTR ((unused)),int sci_idx,void * infop __SS_ATTR ((unused)))21 void ss_list_requests(int argc __SS_ATTR((unused)),
22 const char * const *argv __SS_ATTR((unused)),
23 int sci_idx, void *infop __SS_ATTR((unused)))
24 {
25 ss_request_entry *entry;
26 char const * const *name;
27 int i, spacing;
28 ss_request_table **table;
29
30 FILE *output;
31 int fd;
32 sigset_t omask, igmask;
33 sigret_t (*func)(int);
34 #ifndef NO_FORK
35 int waitb;
36 #endif
37
38 sigemptyset(&igmask);
39 sigaddset(&igmask, SIGINT);
40 sigprocmask(SIG_BLOCK, &igmask, &omask);
41 func = signal(SIGINT, SIG_IGN);
42 fd = ss_pager_create();
43 if (fd < 0) {
44 perror("ss_pager_create");
45 (void) signal(SIGINT, func);
46 return;
47 }
48 output = fdopen(fd, "w");
49 sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
50
51 fprintf (output, "Available %s requests:\n\n",
52 ss_info (sci_idx) -> subsystem_name);
53
54 for (table = ss_info(sci_idx)->rqt_tables; *table; table++) {
55 entry = (*table)->requests;
56 for (; entry->command_names; entry++) {
57 spacing = -2;
58 if (entry->flags & SS_OPT_DONT_LIST)
59 continue;
60 for (name = entry->command_names; *name; name++) {
61 int len = strlen(*name);
62 fputs(*name, output);
63 spacing += len + 2;
64 if (name[1]) {
65 fputs(", ", output);
66 }
67 }
68 if (spacing > 23) {
69 fputc('\n', output);
70 spacing = 0;
71 }
72 for (i = 0; i < 25 - spacing; i++)
73 fputc(' ', output);
74 fputs(entry->info_string, output);
75 fputc('\n', output);
76 }
77 }
78 fclose(output);
79 #ifndef NO_FORK
80 wait(&waitb);
81 #endif
82 (void) signal(SIGINT, func);
83 }
84