104 lines
1.9 KiB
C
104 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 "../kernel/include/signal.h"
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DEFN_SYSCALL1(serial, 44, int);
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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 buf[1024];
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size_t size = read(fd, buf, 1024);
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for (int i = 0; i < size; ++i) {
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char x = buf[i];
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fputc(x, stdout);
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}
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if (size) fflush(stdout);
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}
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pthread_exit(garbage);
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}
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int main(int argc, char ** argv) {
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int device = 0x2F8;
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pthread_t receive_thread;
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pthread_t flush_thread;
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if (argc > 1) {
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if (!strcmp(argv[1], "com1")) {
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device = 0x3F8;
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} else if (!strcmp(argv[1], "com2")) {
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device = 0x2F8;
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} else {
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fprintf(stderr, "Unrecognized com device, try com1 or com2; default is com2.\n");
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return 1;
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}
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}
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printf("\033[1560z");
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fflush(stdout);
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fd = syscall_serial(device);
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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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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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syscall_send_signal(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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printf("\033[1560z");
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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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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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