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 #ifdef HAVE_UNISTD_H
16 #include <unistd.h>
17 #endif
18 #include <signal.h>
19 #include <setjmp.h>
20 #include <sys/wait.h>
21
22 typedef void sigret_t;
23
ss_list_requests(int argc __SS_ATTR ((unused)),const char * const * argv __SS_ATTR ((unused)),int sci_idx,void * infop __SS_ATTR ((unused)))24 void ss_list_requests(int argc __SS_ATTR((unused)),
25 const char * const *argv __SS_ATTR((unused)),
26 int sci_idx, void *infop __SS_ATTR((unused)))
27 {
28 ss_request_entry *entry;
29 char const * const *name;
30 int i, spacing;
31 ss_request_table **table;
32
33 FILE *output;
34 int fd;
35 sigset_t omask, igmask;
36 sigret_t (*func)(int);
37 #ifndef NO_FORK
38 int waitb;
39 #endif
40
41 sigemptyset(&igmask);
42 sigaddset(&igmask, SIGINT);
43 sigprocmask(SIG_BLOCK, &igmask, &omask);
44 func = signal(SIGINT, SIG_IGN);
45 fd = ss_pager_create();
46 if (fd < 0) {
47 perror("ss_pager_create");
48 (void) signal(SIGINT, func);
49 return;
50 }
51 output = fdopen(fd, "w");
52 if (!output) {
53 perror("fdopen");
54 close(fd);
55 (void) signal(SIGINT, func);
56 return;
57 }
58 sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
59
60 fprintf (output, "Available %s requests:\n\n",
61 ss_info (sci_idx) -> subsystem_name);
62
63 for (table = ss_info(sci_idx)->rqt_tables; *table; table++) {
64 entry = (*table)->requests;
65 for (; entry->command_names; entry++) {
66 spacing = -2;
67 if (entry->flags & SS_OPT_DONT_LIST)
68 continue;
69 for (name = entry->command_names; *name; name++) {
70 int len = strlen(*name);
71 fputs(*name, output);
72 spacing += len + 2;
73 if (name[1]) {
74 fputs(", ", output);
75 }
76 }
77 if (spacing > 23) {
78 fputc('\n', output);
79 spacing = 0;
80 }
81 for (i = 0; i < 25 - spacing; i++)
82 fputc(' ', output);
83 fputs(entry->info_string, output);
84 fputc('\n', output);
85 }
86 }
87 fclose(output);
88 #ifndef NO_FORK
89 wait(&waitb);
90 #endif
91 (void) signal(SIGINT, func);
92 }
93