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bird 1.6.3

    1: /*
    2:  *	BIRD Client - Light variant I/O
    3:  *
    4:  *	(c) 1999--2004 Martin Mares <mj@ucw.cz>
    5:  *      (c) 2013 Tomas Hlavacek <tomas.hlavacek@nic.cz>
    6:  *
    7:  *	Can be freely distributed and used under the terms of the GNU GPL.
    8:  */
    9: 
   10: #include <stdio.h>
   11: #include <stdlib.h>
   12: #include <unistd.h>
   13: #include <termios.h>
   14: #include <errno.h>
   15: 
   16: #include <sys/ioctl.h>
   17: #include <signal.h>
   18: 
   19: #include "nest/bird.h"
   20: #include "lib/resource.h"
   21: #include "lib/string.h"
   22: #include "client/client.h"
   23: #include "sysdep/unix/unix.h"
   24: 
   25: #define INPUT_BUF_LEN 2048
   26: 
   27: struct termios tty_save;
   28: 
   29: void
   30: input_start_list(void)
   31: {
   32:   /* Empty in non-ncurses version. */
   33: }
   34: 
   35: void
   36: input_stop_list(void)
   37: {
   38:   /* Empty in non-ncurses version. */
   39: }
   40: 
   41: void
   42: input_notify(int prompt)
   43: {
   44:   /* No ncurses -> no status to reveal/hide, print prompt manually. */
   45:   if (!prompt)
   46:     return;
   47: 
   48:   printf("bird> ");
   49:   fflush(stdout);
   50: }
   51: 
   52: 
   53: static int
   54: lastnb(char *str, int i)
   55: {
   56:   while (i--)
   57:     if ((str[i] != ' ') && (str[i] != '\t'))
   58:       return str[i];
   59: 
   60:   return 0;
   61: }
   62: 
   63: void
   64: input_read(void)
   65: {
   66:   char buf[INPUT_BUF_LEN];
   67: 
   68:   if ((fgets(buf, INPUT_BUF_LEN, stdin) == NULL) || (buf[0] == 0))
   69:   {
   70:     putchar('\n');
   71:     cleanup();
   72:     exit(0);
   73:   }
   74: 
   75:   int l = strlen(buf);
   76:   if ((l+1) == INPUT_BUF_LEN)
   77:     {
   78:       printf("Input too long.\n");
   79:       return;
   80:     }
   81: 
   82:   if (buf[l-1] == '\n')
   83:     buf[--l] = '\0';
   84: 
   85:   if (!interactive)
   86:     printf("%s\n", buf);
   87: 
   88:   if (l == 0)
   89:     return;
   90: 
   91:   if (lastnb(buf, l) == '?')
   92:     {
   93:       cmd_help(buf, strlen(buf));
   94:       return;
   95:     }
   96: 
   97:   submit_command(buf);
   98: }
   99: 
  100: static struct termios stored_tty;
  101: static int more_active = 0;
  102: 
  103: void
  104: more_begin(void)
  105: {
  106:   static struct termios tty;
  107: 
  108:   tty = stored_tty;
  109:   tty.c_lflag &= (~ECHO);
  110:   tty.c_lflag &= (~ICANON);
  111: 
  112:   if (tcsetattr (0, TCSANOW, &tty) < 0)
  113:     DIE("tcsetattr");
  114: 
  115:   more_active = 1;
  116: }
  117: 
  118: void
  119: more_end(void)
  120: {
  121:   more_active = 0;
  122: 
  123:   if (tcsetattr (0, TCSANOW, &stored_tty) < 0)
  124:     DIE("tcsetattr");
  125: }
  126: 
  127: static void
  128: sig_handler(int signal UNUSED)
  129: {
  130:   cleanup();
  131:   exit(0);
  132: }
  133: 
  134: void
  135: input_init(void)
  136: {
  137:   if (!interactive)
  138:     return;
  139: 
  140:   if (tcgetattr(0, &stored_tty) < 0)
  141:     DIE("tcgetattr");
  142: 
  143:   if (signal(SIGINT, sig_handler) == SIG_IGN)
  144:     signal(SIGINT, SIG_IGN);
  145:   if (signal(SIGTERM, sig_handler) == SIG_IGN)
  146:     signal(SIGTERM, SIG_IGN);
  147: 
  148:   struct winsize tws;
  149:   if (ioctl(0, TIOCGWINSZ, &tws) == 0)
  150:     {
  151:       term_lns = tws.ws_row;
  152:       term_cls = tws.ws_col;
  153:     }
  154: }
  155: 
  156: void
  157: cleanup(void)
  158: {
  159:   if (more_active)
  160:     more_end();
  161: }