FreeCalypso > hg > freecalypso-sw
annotate loadtools/ttypassthru.c @ 239:28ea957a9d8a
tiffs lsino of specific inodes implemented
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Mon, 27 Jan 2014 01:50:22 +0000 |
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1 /* |
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2 * This module implements the pass-thru operation mode, in which |
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3 * the Unix host tty is cross-connected directly to the target |
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4 * running some code we have just loaded. |
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5 */ |
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6 |
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7 #include <sys/types.h> |
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8 #include <sys/ioctl.h> |
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9 #include <sys/errno.h> |
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10 #include <termios.h> |
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11 #include <stdio.h> |
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12 #include <stdlib.h> |
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13 #include <unistd.h> |
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14 #include <strings.h> |
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15 |
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16 extern int errno; |
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17 |
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18 extern int target_fd; |
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19 |
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20 static struct termios saved_termios, my_termios; |
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21 |
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22 static void |
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23 safe_output(buf, cc) |
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24 u_char *buf; |
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25 { |
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26 int i, c; |
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27 |
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28 for (i = 0; i < cc; i++) { |
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29 c = buf[i]; |
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30 if (c == '\r' || c == '\n' || c == '\t' || c == '\b') { |
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31 putchar(c); |
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32 continue; |
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33 } |
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34 if (c & 0x80) { |
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35 putchar('M'); |
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36 putchar('-'); |
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37 c &= 0x7F; |
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38 } |
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39 if (c < 0x20) { |
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40 putchar('^'); |
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41 putchar(c + '@'); |
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42 } else if (c == 0x7F) { |
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43 putchar('^'); |
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44 putchar('?'); |
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45 } else |
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46 putchar(c); |
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47 } |
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48 fflush(stdout); |
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49 } |
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50 |
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51 static void |
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52 loop() |
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53 { |
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54 char buf[BUFSIZ]; |
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55 fd_set fds, fds1; |
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56 register int i, cc, max; |
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57 |
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58 FD_ZERO(&fds); |
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59 FD_SET(0, &fds); |
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60 FD_SET(target_fd, &fds); |
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61 max = target_fd + 1; |
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62 for (;;) { |
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63 bcopy(&fds, &fds1, sizeof(fd_set)); |
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64 i = select(max, &fds1, NULL, NULL, NULL); |
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65 if (i < 0) { |
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66 if (errno == EINTR) |
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67 continue; |
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68 tcsetattr(0, TCSAFLUSH, &saved_termios); |
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69 perror("select"); |
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70 exit(1); |
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71 } |
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72 if (FD_ISSET(0, &fds1)) { |
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73 cc = read(0, buf, sizeof buf); |
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74 if (cc <= 0) |
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75 return; |
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76 if (cc == 1 && buf[0] == 0x1C) |
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77 return; |
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78 write(target_fd, buf, cc); |
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79 } |
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80 if (FD_ISSET(target_fd, &fds1)) { |
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81 cc = read(target_fd, buf, sizeof buf); |
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82 if (cc <= 0) { |
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83 tcsetattr(0, TCSAFLUSH, &saved_termios); |
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84 fprintf(stderr, "EOF/error on target tty\n"); |
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85 exit(1); |
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86 } |
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87 safe_output(buf, cc); |
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88 } |
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89 } |
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90 } |
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91 |
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92 tty_passthru() |
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93 { |
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94 static int zero = 0; |
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95 |
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96 ioctl(target_fd, FIONBIO, &zero); |
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97 |
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98 tcgetattr(0, &saved_termios); |
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99 bcopy(&saved_termios, &my_termios, sizeof(struct termios)); |
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100 cfmakeraw(&my_termios); |
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101 my_termios.c_cc[VMIN] = 1; |
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102 my_termios.c_cc[VTIME] = 0; |
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103 tcsetattr(0, TCSAFLUSH, &my_termios); |
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104 |
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105 printf("Entering tty pass-thru; type ^\\ to exit\r\n\n"); |
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106 loop(); |
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107 tcsetattr(0, TCSAFLUSH, &saved_termios); |
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108 return 0; |
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109 } |