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 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
