108 lines
1.9 KiB
C
108 lines
1.9 KiB
C
/*
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* cat
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*
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* Concatenates files together to standard output.
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* In a supporting terminal, you can then pipe
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* standard out to another file or other useful
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* things like that.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <syscall.h>
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#include "lib/pthread.h"
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#include <signal.h>
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#include <termios.h>
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int fd = 0;
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int child_pid = 0;
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void *print_serial_stuff(void * garbage) {
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child_pid = gettid();
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while (1) {
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char x;
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read(fd, &x, 1);
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fputc(x, stdout);
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fflush(stdout);
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}
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pthread_exit(garbage);
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}
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struct termios old;
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void set_unbuffered() {
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tcgetattr(fileno(stdin), &old);
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struct termios new = old;
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new.c_lflag &= (~ICANON & ~ECHO);
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tcsetattr(fileno(stdin), TCSAFLUSH, &new);
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}
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void set_buffered() {
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tcsetattr(fileno(stdin), TCSAFLUSH, &old);
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}
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int main(int argc, char ** argv) {
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pthread_t receive_thread;
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pthread_t flush_thread;
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char * device = argv[1];
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if (argc < 1) {
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device = "/dev/ttyS0";
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}
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set_unbuffered();
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fd = syscall_open(device, 0, 0);
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pthread_create(&receive_thread, NULL, print_serial_stuff, NULL);
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while (1) {
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char c = fgetc(stdin);
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if (c == 27) {
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char x = fgetc(stdin);
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if (x == ']') {
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while (1) {
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printf("serial-console>\033[1561z ");
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set_buffered();
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fflush(stdout);
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char line[1024];
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fgets(line, 1024, stdin);
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int i = strlen(line);
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line[i-1] = '\0';
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if (!strcmp(line, "quit")) {
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kill(child_pid, SIGKILL);
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printf("Waiting for threads to shut down...\n");
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syscall_wait(child_pid);
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printf("Exiting.\n");
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return 0;
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} else if (!strcmp(line, "continue")) {
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set_unbuffered();
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fflush(stdout);
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break;
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}
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}
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} else {
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ungetc(x, stdin);
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}
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}
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char buf[1] = {c};
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write(fd, buf, 1);
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}
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close(fd);
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set_buffered();
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return 0;
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}
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/*
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* vim:tabstop=4
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* vim:noexpandtab
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* vim:shiftwidth=4
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*/
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