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 "ss_internal.h" 14 #include <signal.h> 15 #include <setjmp.h> 16 #include <sys/wait.h> 17 18 typedef void sigret_t; 19 20 static char const twentyfive_spaces[26] = 21 " "; 22 static char const NL[2] = "\n"; 23 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 spacing; 31 ss_request_table **table; 32 33 char buffer[BUFSIZ]; 34 FILE *output; 35 int fd; 36 sigset_t omask, igmask; 37 sigret_t (*func)(int); 38 #ifndef NO_FORK 39 int waitb; 40 #endif 41 42 sigemptyset(&igmask); 43 sigaddset(&igmask, SIGINT); 44 sigprocmask(SIG_BLOCK, &igmask, &omask); 45 func = signal(SIGINT, SIG_IGN); 46 fd = ss_pager_create(); 47 if (fd < 0) { 48 perror("ss_pager_create"); 49 (void) signal(SIGINT, func); 50 return; 51 } 52 output = fdopen(fd, "w"); 53 sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0); 54 55 fprintf (output, "Available %s requests:\n\n", 56 ss_info (sci_idx) -> subsystem_name); 57 58 for (table = ss_info(sci_idx)->rqt_tables; *table; table++) { 59 entry = (*table)->requests; 60 for (; entry->command_names; entry++) { 61 spacing = -2; 62 buffer[0] = '\0'; 63 if (entry->flags & SS_OPT_DONT_LIST) 64 continue; 65 for (name = entry->command_names; *name; name++) { 66 int len = strlen(*name); 67 strncat(buffer, *name, len); 68 spacing += len + 2; 69 if (name[1]) { 70 strcat(buffer, ", "); 71 } 72 } 73 if (spacing > 23) { 74 strcat(buffer, NL); 75 fputs(buffer, output); 76 spacing = 0; 77 buffer[0] = '\0'; 78 } 79 strncat(buffer, twentyfive_spaces, 25-spacing); 80 strcat(buffer, entry->info_string); 81 strcat(buffer, NL); 82 fputs(buffer, output); 83 } 84 } 85 fclose(output); 86 #ifndef NO_FORK 87 wait(&waitb); 88 #endif 89 (void) signal(SIGINT, func); 90 } 91
