[1108] | 1 | |
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| 2 | #include <fcntl.h> |
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| 3 | #include <stdio.h> |
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| 4 | #include <stdlib.h> |
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| 5 | #include <string.h> |
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| 6 | #include <termios.h> |
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| 7 | #include <unistd.h> |
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| 8 | |
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| 9 | #include <sys/ioctl.h> |
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| 10 | |
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| 11 | #include <linux/serial.h> |
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| 12 | #include <linux/serial_core.h> |
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| 13 | |
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| 14 | struct speeds |
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| 15 | { |
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| 16 | speed_t speed; |
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| 17 | unsigned long value; |
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| 18 | }; |
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| 19 | |
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| 20 | struct speeds speed_map[] = |
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| 21 | { |
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| 22 | {B50, 50}, |
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| 23 | {B75, 75}, |
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| 24 | {B110, 110}, |
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| 25 | {B134, 134}, |
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| 26 | {B150, 150}, |
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| 27 | {B200, 200}, |
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| 28 | {B300, 300}, |
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| 29 | {B600, 600}, |
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| 30 | {B1200, 1200}, |
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| 31 | {B1800, 1800}, |
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| 32 | {B2400, 2400}, |
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| 33 | {B4800, 4800}, |
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| 34 | {B9600, 9600}, |
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| 35 | {B19200, 19200}, |
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| 36 | {B38400, 38400}, |
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| 37 | #ifdef B57600 |
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| 38 | {B57600, 57600}, |
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| 39 | #endif |
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| 40 | #ifdef B115200 |
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| 41 | {B115200, 115200}, |
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| 42 | #endif |
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| 43 | #ifdef B230400 |
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| 44 | {B230400, 230400}, |
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| 45 | #endif |
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| 46 | #ifdef B460800 |
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| 47 | {B460800, 460800}, |
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| 48 | #endif |
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| 49 | {0, 0} |
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| 50 | }; |
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| 51 | |
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| 52 | int termcmp(struct termios *a, struct termios *b) { |
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| 53 | if (a->c_iflag != b->c_iflag || a->c_oflag != b->c_oflag || |
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| 54 | a->c_cflag != b->c_cflag || a->c_lflag != b->c_lflag || |
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| 55 | cfgetispeed(a) != cfgetispeed(b) || cfgetospeed(a) != cfgetospeed(b)) |
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| 56 | return 1; |
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| 57 | return memcmp(a->c_cc, b->c_cc, sizeof(a->c_cc)); |
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| 58 | } |
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| 59 | |
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| 60 | int get_serial_speed(int fd) { |
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| 61 | struct termios mode; |
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| 62 | |
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| 63 | if (!tcgetattr(fd, &mode)) { |
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| 64 | int i; |
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| 65 | speed_t speed; |
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| 66 | |
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| 67 | speed = cfgetospeed(&mode); |
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| 68 | for (i = 0; speed_map[i].value != 0; i++) |
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| 69 | if (speed_map[i].speed == speed) |
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| 70 | return speed_map[i].value; |
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| 71 | } |
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| 72 | return 0; |
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| 73 | } |
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| 74 | |
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| 75 | int compare_termios_to_console(char *dev, int *speed) { |
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| 76 | struct termios cmode, mode; |
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| 77 | int fd, cfd; |
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| 78 | |
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| 79 | cfd = open ("/dev/console", O_RDONLY); |
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| 80 | tcgetattr(cfd, &cmode); |
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| 81 | close(cfd); |
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| 82 | |
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| 83 | fd = open(dev, O_RDONLY|O_NONBLOCK); |
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| 84 | tcgetattr(fd, &mode); |
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| 85 | |
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| 86 | if (!termcmp(&cmode, &mode)) { |
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| 87 | *speed = get_serial_speed(fd); |
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| 88 | close(fd); |
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| 89 | return 1; |
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| 90 | } |
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| 91 | close(fd); |
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| 92 | return 0; |
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| 93 | } |
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| 94 | |
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| 95 | char *serial_tty_name(int type) { |
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| 96 | switch (type) { |
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| 97 | case PORT_8250...PORT_MAX_8250: |
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| 98 | return "ttyS"; |
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| 99 | case PORT_PMAC_ZILOG: |
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| 100 | return "ttyPZ"; |
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| 101 | case PORT_MPSC: |
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| 102 | return "ttyMM"; |
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| 103 | case PORT_CPM: |
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| 104 | return "ttyCPM"; |
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| 105 | case PORT_MPC52xx: |
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| 106 | return "ttyPSC"; |
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| 107 | default: |
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| 108 | return NULL; |
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| 109 | } |
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| 110 | } |
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| 111 | |
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| 112 | char *check_serial_console(int *speed) { |
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| 113 | int fd; |
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| 114 | char *ret = NULL, *device; |
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| 115 | char twelve = 12; |
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| 116 | struct serial_struct si, si2; |
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| 117 | char *tty_name; |
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| 118 | |
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| 119 | memset(&si, 0, sizeof(si)); |
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| 120 | memset(&si2, 0, sizeof(si)); |
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| 121 | |
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| 122 | fd = open("/dev/console", O_RDWR); |
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| 123 | if (ioctl (fd, TIOCLINUX, &twelve) >= 0) |
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| 124 | goto out; |
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| 125 | |
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| 126 | if (ioctl(fd, TIOCGSERIAL, &si) < 0) |
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| 127 | goto out; |
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| 128 | close(fd); |
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| 129 | |
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| 130 | tty_name = serial_tty_name(si.type); |
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| 131 | if (!tty_name) |
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| 132 | goto out; |
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| 133 | |
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| 134 | asprintf(&device, "%s%d", tty_name, si.line); |
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| 135 | fd = open(device, O_RDWR|O_NONBLOCK); |
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| 136 | if (fd == -1) |
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| 137 | goto out; |
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| 138 | |
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| 139 | if (ioctl(fd, TIOCGSERIAL, &si2) < 0) |
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| 140 | goto out; |
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| 141 | |
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| 142 | if (memcmp(&si,&si2, sizeof(si))) |
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| 143 | goto out; |
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| 144 | |
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| 145 | *speed = get_serial_speed(fd); |
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| 146 | ret = device; |
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| 147 | out: |
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| 148 | close(fd); |
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| 149 | return ret; |
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| 150 | } |
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| 151 | |
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| 152 | int emit_console_event(char *dev, int speed) { |
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| 153 | char *args[] = { "initctl", "emit", "--no-wait", "fedora.serial-console-available", NULL, NULL, NULL }; |
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| 154 | |
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| 155 | args[4] = dev; |
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| 156 | if (speed) |
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| 157 | asprintf(&args[5],"%d",speed); |
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| 158 | execv("/sbin/initctl", args); |
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| 159 | return 1; |
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| 160 | } |
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| 161 | |
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| 162 | int main(int argc, char **argv) { |
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| 163 | char *device; |
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| 164 | int speed; |
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| 165 | |
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| 166 | if (argc < 2) { |
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| 167 | printf("usage: console_check <device>\n"); |
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| 168 | exit(1); |
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| 169 | } |
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| 170 | chdir("/dev"); |
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| 171 | device = argv[1]; |
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| 172 | if (!strcmp(device, "console")) { |
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| 173 | device = check_serial_console(&speed); |
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| 174 | if (device) |
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| 175 | return emit_console_event(device, speed); |
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| 176 | } else if (compare_termios_to_console(device, &speed)) { |
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| 177 | return emit_console_event(device, speed); |
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| 178 | } |
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| 179 | return 0; |
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| 180 | } |
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