Hardware
/
litex
mirror of https://github.com/enjoy-digital/litex.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
litex/tools/flterm.c

736 lines
19 KiB
C
Raw Blame History

/*
* Milkymist SoC
* Copyright (C) 2007, 2008, 2009, 2010, 2011 Sebastien Bourdeauducq
* Copyright (C) 2011 Michael Walle
* Copyright (C) 2004 MontaVista Software, Inc
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <string.h>
#include <ctype.h>
#include <termios.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <poll.h>
#include <fcntl.h>
#include <getopt.h>
#include <sfl.h>
#define DEFAULT_KERNELADR (0x40000000)
#define DEFAULT_CMDLINEADR (0x41000000)
#define DEFAULT_INITRDADR (0x41002000)
#define GDBBUFLEN 1000
unsigned int crc16_table[256] = {
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
};
static int debug = 0;
static unsigned short crc16(const void *_buffer, int len)
{
const unsigned char *buffer = (const unsigned char *)_buffer;
unsigned short crc;
crc = 0;
while(len-- > 0)
crc = crc16_table[((crc >> 8) ^ (*buffer++)) & 0xFF] ^ (crc << 8);
return crc;
}
static int write_exact(int fd, const char *data, unsigned int length)
{
int r;
while(length > 0) {
r = write(fd, data, length);
if(r <= 0) return 0;
length -= r;
data += r;
}
return 1;
}
/* length, cmd and payload must be filled in */
static int send_frame(int serialfd, struct sfl_frame *frame)
{
unsigned short int crc;
int retry;
char reply;
crc = crc16(&frame->cmd, frame->length+1);
frame->crc[0] = (crc & 0xff00) >> 8;
frame->crc[1] = (crc & 0x00ff);
retry = 0;
do {
if(!write_exact(serialfd, (char *)frame, frame->length+4)) {
perror("[FLTERM] Unable to write to serial port.");
return 0;
}
/* Get the reply from the device */
read(serialfd, &reply, 1); /* TODO: timeout */
switch(reply) {
case SFL_ACK_SUCCESS:
retry = 0;
break;
case SFL_ACK_CRCERROR:
retry = 1;
break;
default:
fprintf(stderr, "[FLTERM] Got unknown reply '%c' from the device, aborting.\n", reply);
return 0;
}
} while(retry);
return 1;
}
static int upload_fd(int serialfd, const char *name, int firmwarefd, unsigned int load_address)
{
struct sfl_frame frame;
int readbytes;
int length;
int position;
unsigned int current_address;
struct timeval t0;
struct timeval t1;
int millisecs;
length = lseek(firmwarefd, 0, SEEK_END);
lseek(firmwarefd, 0, SEEK_SET);
printf("[FLTERM] Uploading %s (%d bytes)...\n", name, length);
gettimeofday(&t0, NULL);
current_address = load_address;
position = 0;
while(1) {
printf("%d%%\r", 100*position/length);
fflush(stdout);
readbytes = read(firmwarefd, &frame.payload[4], sizeof(frame.payload) - 4);
if(readbytes < 0) {
perror("[FLTERM] Unable to read image.");
return -1;
}
if(readbytes == 0) break;
frame.length = readbytes+4;
frame.cmd = SFL_CMD_LOAD;
frame.payload[0] = (current_address & 0xff000000) >> 24;
frame.payload[1] = (current_address & 0x00ff0000) >> 16;
frame.payload[2] = (current_address & 0x0000ff00) >> 8;
frame.payload[3] = (current_address & 0x000000ff);
if(!send_frame(serialfd, &frame)) return -1;
current_address += readbytes;
position += readbytes;
}
gettimeofday(&t1, NULL);
millisecs = (t1.tv_sec - t0.tv_sec)*1000 + (t1.tv_usec - t0.tv_usec)/1000;
printf("[FLTERM] Upload complete (%.1fKB/s).\n", 1000.0*(double)length/((double)millisecs*1024.0));
return length;
}
static const char sfl_magic_req[SFL_MAGIC_LEN] = SFL_MAGIC_REQ;
static const char sfl_magic_ack[SFL_MAGIC_LEN] = SFL_MAGIC_ACK;
static void answer_magic(int serialfd,
const char *kernel_image, unsigned int kernel_address,
const char *cmdline, unsigned int cmdline_address,
const char *initrd_image, unsigned int initrd_address)
{
int kernelfd, initrdfd;
struct sfl_frame frame;
printf("[FLTERM] Received firmware download request from the device.\n");
kernelfd = open(kernel_image, O_RDONLY);
if(kernelfd == -1) {
perror("[FLTERM] Unable to open kernel image (request ignored).");
return;
}
initrdfd = -1;
if(initrd_image != NULL) {
initrdfd = open(initrd_image, O_RDONLY);
if(initrdfd == -1) {
perror("[FLTERM] Unable to open initrd image (request ignored).");
close(kernelfd);
return;
}
}
write_exact(serialfd, sfl_magic_ack, SFL_MAGIC_LEN);
upload_fd(serialfd, "kernel", kernelfd, kernel_address);
if(cmdline != NULL) {
int len;
printf("[FLTERM] Setting kernel command line: '%s'.\n", cmdline);
len = strlen(cmdline)+1;
if(len > (254-4)) {
fprintf(stderr, "[FLTERM] Kernel command line too long, load aborted.\n");
close(initrdfd);
close(kernelfd);
return;
}
frame.length = len+4;
frame.cmd = SFL_CMD_LOAD;
frame.payload[0] = (cmdline_address & 0xff000000) >> 24;
frame.payload[1] = (cmdline_address & 0x00ff0000) >> 16;
frame.payload[2] = (cmdline_address & 0x0000ff00) >> 8;
frame.payload[3] = (cmdline_address & 0x000000ff);
strcpy((char *)&frame.payload[4], cmdline);
send_frame(serialfd, &frame);
frame.length = 4;
frame.cmd = SFL_CMD_CMDLINE;
frame.payload[0] = (cmdline_address & 0xff000000) >> 24;
frame.payload[1] = (cmdline_address & 0x00ff0000) >> 16;
frame.payload[2] = (cmdline_address & 0x0000ff00) >> 8;
frame.payload[3] = (cmdline_address & 0x000000ff);
send_frame(serialfd, &frame);
}
if(initrdfd != -1) {
int len;
len = upload_fd(serialfd, "initrd", initrdfd, initrd_address);
if(len <= 0) return;
frame.length = 4;
frame.cmd = SFL_CMD_INITRDSTART;
frame.payload[0] = (initrd_address & 0xff000000) >> 24;
frame.payload[1] = (initrd_address & 0x00ff0000) >> 16;
frame.payload[2] = (initrd_address & 0x0000ff00) >> 8;
frame.payload[3] = (initrd_address & 0x000000ff);
send_frame(serialfd, &frame);
initrd_address += len-1;
frame.length = 4;
frame.cmd = SFL_CMD_INITRDEND;
frame.payload[0] = (initrd_address & 0xff000000) >> 24;
frame.payload[1] = (initrd_address & 0x00ff0000) >> 16;
frame.payload[2] = (initrd_address & 0x0000ff00) >> 8;
frame.payload[3] = (initrd_address & 0x000000ff);
send_frame(serialfd, &frame);
}
/* Send the jump command */
printf("[FLTERM] Booting the device.\n");
frame.length = 4;
frame.cmd = SFL_CMD_JUMP;
frame.payload[0] = (kernel_address & 0xff000000) >> 24;
frame.payload[1] = (kernel_address & 0x00ff0000) >> 16;
frame.payload[2] = (kernel_address & 0x0000ff00) >> 8;
frame.payload[3] = (kernel_address & 0x000000ff);
if(!send_frame(serialfd, &frame)) return;
printf("[FLTERM] Done.\n");
close(initrdfd);
close(kernelfd);
}
static int hex(unsigned char c)
{
if(c >= 'a' && c <= 'f') {
return c - 'a' + 10;
}
if(c >= '0' && c <= '9') {
return c - '0';
}
if(c >= 'A' && c <= 'F') {
return c - 'A' + 10;
}
return 0;
}
/*
* This is taken from kdmx2.
* Author: Tom Rini <trini@mvista.com>
*/
static void gdb_process_packet(int infd, int outfd, int altfd)
{
/* gdb packet handling */
char gdbbuf[GDBBUFLEN + 1];
int pos = 0;
unsigned char runcksum = 0;
unsigned char recvcksum = 0;
struct pollfd fds;
char c;
int seen_hash = 0;
fds.fd = infd;
fds.events = POLLIN;
memset(gdbbuf, 0, sizeof(gdbbuf));
gdbbuf[0] = '$';
pos++;
while (1) {
fds.revents = 0;
if(poll(&fds, 1, 100) == 0) {
/* timeout */
if(altfd != -1) {
write(altfd, gdbbuf, pos);
}
break;
}
if(pos == GDBBUFLEN) {
if(altfd != -1) {
write(altfd, gdbbuf, pos);
}
break;
}
read(infd, &c, 1);
gdbbuf[pos++] = c;
if(c == '#') {
seen_hash = 1;
} else if(seen_hash == 0) {
runcksum += c;
} else if(seen_hash == 1) {
recvcksum = hex(c) << 4;
seen_hash = 2;
} else if(seen_hash == 2) {
recvcksum |= hex(c);
seen_hash = 3;
}
if(seen_hash == 3) {
/* we're done */
runcksum %= 256;
if(recvcksum == runcksum) {
if(debug) {
fprintf(stderr, "[GDB %s]\n", gdbbuf);
}
write(outfd, gdbbuf, pos);
} else {
if(altfd != -1) {
write(altfd, gdbbuf, pos);
}
}
seen_hash = 0;
break;
}
}
}
static void do_terminal(char *serial_port,
int doublerate, int gdb_passthrough,
const char *kernel_image, unsigned int kernel_address,
const char *cmdline, unsigned int cmdline_address,
const char *initrd_image, unsigned int initrd_address,
char *log_path)
{
int serialfd;
int gdbfd = -1;
FILE *logfd = NULL;
struct termios my_termios;
char c;
int recognized;
struct pollfd fds[3];
int flags;
int rsp_pending = 0;
/* Open and configure the serial port */
if(log_path != NULL) {
logfd = fopen(log_path, "a+");
if(logfd == NULL) {
perror("Unable to open log file");
return;
}
}
serialfd = open(serial_port, O_RDWR|O_NOCTTY);
if(serialfd == -1) {
perror("Unable to open serial port");
return;
}
/* Thanks to Julien Schmitt (GTKTerm) for figuring out the correct parameters
* to put into that weird struct.
*/
tcgetattr(serialfd, &my_termios);
my_termios.c_cflag = doublerate ? B230400 : B115200;
my_termios.c_cflag |= CS8;
my_termios.c_cflag |= CREAD;
my_termios.c_iflag = IGNPAR | IGNBRK;
my_termios.c_cflag |= CLOCAL;
my_termios.c_oflag = 0;
my_termios.c_lflag = 0;
my_termios.c_cc[VTIME] = 0;
my_termios.c_cc[VMIN] = 1;
tcsetattr(serialfd, TCSANOW, &my_termios);
tcflush(serialfd, TCOFLUSH);
tcflush(serialfd, TCIFLUSH);
/* Prepare the fdset for poll() */
fds[0].fd = 0;
fds[0].events = POLLIN;
fds[1].fd = serialfd;
fds[1].events = POLLIN;
recognized = 0;
flags = fcntl(serialfd, F_GETFL, 0);
while(1) {
if(gdbfd == -1 && gdb_passthrough) {
gdbfd = open("/dev/ptmx", O_RDWR);
if(grantpt(gdbfd) != 0) {
perror("grantpt()");
return;
}
if(unlockpt(gdbfd) != 0) {
perror("unlockpt()");
return;
}
printf("[GDB passthrough] use %s as GDB remote device\n",
ptsname(gdbfd));
fds[2].fd = gdbfd;
fds[2].events = POLLIN;
}
fds[0].revents = 0;
fds[1].revents = 0;
fds[2].revents = 0;
/* poll() behaves strangely when the serial port descriptor is in
* blocking mode. So work around this.
*/
fcntl(serialfd, F_SETFL, flags|O_NONBLOCK);
if(poll(&fds[0], (gdbfd == -1) ? 2 : 3, -1) < 0) break;
fcntl(serialfd, F_SETFL, flags);
if(fds[0].revents & POLLIN) {
if(read(0, &c, 1) <= 0) break;
if(write(serialfd, &c, 1) <= 0) break;
}
if(fds[2].revents & POLLIN) {
rsp_pending = 1;
if(read(gdbfd, &c, 1) <= 0) break;
if(c == '\03') {
/* convert ETX to breaks */
if(debug) {
fprintf(stderr, "[GDB BREAK]\n");
}
tcsendbreak(serialfd, 0);
} else if(c == '$') {
gdb_process_packet(gdbfd, serialfd, -1);
} else if(c == '+' || c == '-') {
write(serialfd, &c, 1);
} else {
fprintf(stderr, "Internal error (line %d)", __LINE__);
exit(1);
}
}
if(fds[2].revents & POLLHUP) {
/* close and reopen new pair */
close(gdbfd);
gdbfd = -1;
continue;
}
if(fds[1].revents & POLLIN) {
if(read(serialfd, &c, 1) <= 0) break;
if(logfd && c && isascii(c)) {
fwrite(&c, sizeof(c), 1, logfd);
if(c == '\n') fflush(logfd);
}
if(gdbfd != -1 && rsp_pending && (c == '+' || c == '-')) {
rsp_pending = 0;
write(gdbfd, &c, 1);
} else if(gdbfd != -1 && c == '$') {
gdb_process_packet(serialfd, gdbfd, 0);
} else {
/* write to terminal */
write(0, &c, 1);
if(kernel_image != NULL) {
if(c == sfl_magic_req[recognized]) {
recognized++;
if(recognized == SFL_MAGIC_LEN) {
/* We've got the magic string ! */
recognized = 0;
answer_magic(serialfd,
kernel_image, kernel_address,
cmdline, cmdline_address,
initrd_image, initrd_address);
}
} else {
if(c == sfl_magic_req[0]) recognized = 1; else recognized = 0;
}
}
}
}
}
close(serialfd);
if(gdbfd != -1) close(gdbfd);
if(logfd) fclose(logfd);
}
enum {
OPTION_PORT,
OPTION_GDB_PASSTHROUGH,
OPTION_DOUBLERATE,
OPTION_DEBUG,
OPTION_KERNEL,
OPTION_KERNELADR,
OPTION_CMDLINE,
OPTION_CMDLINEADR,
OPTION_INITRD,
OPTION_INITRDADR,
OPTION_LOG
};
static const struct option options[] = {
{
.name = "port",
.has_arg = 1,
.val = OPTION_PORT
},
{
.name = "gdb-passthrough",
.has_arg = 0,
.val = OPTION_GDB_PASSTHROUGH
},
{
.name = "debug",
.has_arg = 0,
.val = OPTION_DEBUG
},
{
.name = "double-rate",
.has_arg = 0,
.val = OPTION_DOUBLERATE
},
{
.name = "kernel",
.has_arg = 1,
.val = OPTION_KERNEL
},
{
.name = "kernel-adr",
.has_arg = 1,
.val = OPTION_KERNELADR
},
{
.name = "cmdline",
.has_arg = 1,
.val = OPTION_CMDLINE
},
{
.name = "cmdline-adr",
.has_arg = 1,
.val = OPTION_CMDLINEADR
},
{
.name = "initrd",
.has_arg = 1,
.val = OPTION_INITRD
},
{
.name = "initrd-adr",
.has_arg = 1,
.val = OPTION_INITRDADR
},
{
.name = "log",
.has_arg = 1,
.val = OPTION_LOG
},
{
.name = NULL
}
};
static void print_usage()
{
fprintf(stderr, "Serial boot program for Milkymist SoC - v. 2.2\n");
fprintf(stderr, "Copyright (C) 2007, 2008, 2009, 2010, 2011 Sebastien Bourdeauducq\n");
fprintf(stderr, "Copyright (C) 2011 Michael Walle\n");
fprintf(stderr, "Copyright (C) 2004 MontaVista Software, Inc\n\n");
fprintf(stderr, "This program is free software: you can redistribute it and/or modify\n");
fprintf(stderr, "it under the terms of the GNU General Public License as published by\n");
fprintf(stderr, "the Free Software Foundation, version 3 of the License.\n\n");
fprintf(stderr, "Usage: flterm --port <port>\n");
fprintf(stderr, " [--double-rate] [--gdb-passthrough] [--debug]\n");
fprintf(stderr, " [--kernel <kernel_image> [--kernel-adr <address>]]\n");
fprintf(stderr, " [--cmdline <cmdline> [--cmdline-adr <address>]]\n");
fprintf(stderr, " [--initrd <initrd_image> [--initrd-adr <address>]]\n");
fprintf(stderr, " [--log <log_file>]\n\n");
fprintf(stderr, "Default load addresses:\n");
fprintf(stderr, " kernel: 0x%08x\n", DEFAULT_KERNELADR);
fprintf(stderr, " cmdline: 0x%08x\n", DEFAULT_CMDLINEADR);
fprintf(stderr, " initrd: 0x%08x\n", DEFAULT_INITRDADR);
}
int main(int argc, char *argv[])
{
int opt;
char *serial_port;
int doublerate;
int gdb_passthrough;
char *kernel_image;
unsigned int kernel_address;
char *cmdline;
unsigned int cmdline_address;
char *initrd_image;
unsigned int initrd_address;
char *endptr;
char *log_path;
struct termios otty, ntty;
/* Fetch command line arguments */
serial_port = NULL;
doublerate = 0;
gdb_passthrough = 0;
kernel_image = NULL;
kernel_address = DEFAULT_KERNELADR;
cmdline = NULL;
cmdline_address = DEFAULT_CMDLINEADR;
initrd_image = NULL;
initrd_address = DEFAULT_INITRDADR;
log_path = NULL;
while((opt = getopt_long(argc, argv, "", options, NULL)) != -1) {
if(opt == '?') {
print_usage();
return 1;
}
switch(opt) {
case OPTION_PORT:
free(serial_port);
serial_port = strdup(optarg);
break;
case OPTION_DOUBLERATE:
doublerate = 1;
break;
case OPTION_DEBUG:
debug = 1;
break;
case OPTION_GDB_PASSTHROUGH:
gdb_passthrough = 1;
break;
case OPTION_KERNEL:
free(kernel_image);
kernel_image = strdup(optarg);
break;
case OPTION_KERNELADR:
kernel_address = strtoul(optarg, &endptr, 0);
if(*endptr != 0) kernel_address = 0;
break;
case OPTION_CMDLINE:
free(cmdline);
cmdline = strdup(optarg);
break;
case OPTION_CMDLINEADR:
cmdline_address = strtoul(optarg, &endptr, 0);
if(*endptr != 0) cmdline_address = 0;
break;
case OPTION_INITRD:
free(initrd_image);
initrd_image = strdup(optarg);
break;
case OPTION_INITRDADR:
initrd_address = strtoul(optarg, &endptr, 0);
if(*endptr != 0) initrd_address = 0;
break;
case OPTION_LOG:
free(log_path);
log_path = strdup(optarg);
break;
}
}
if(serial_port == NULL) {
print_usage();
return 1;
}
/* Banner */
printf("[FLTERM] Starting...\n");
/* Set up stdin/out */
tcgetattr(0, &otty);
ntty = otty;
ntty.c_lflag &= ~(ECHO | ICANON);
tcsetattr(0, TCSANOW, &ntty);
/* Do the bulk of the work */
do_terminal(serial_port, doublerate, gdb_passthrough,
kernel_image, kernel_address,
cmdline, cmdline_address,
initrd_image, initrd_address,
log_path);
/* Restore stdin/out into their previous state */
tcsetattr(0, TCSANOW, &otty);
return 0;
}
Reference in New Issue View Git Blame Copy Permalink