143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
#define _XOPEN_SOURCE
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <utmp.h>
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#include <string.h>
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#include <pty.h>
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#include <stdlib.h>
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#include "hl_vt100.h"
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struct vt100_headless *vt100_headless_init(void)
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{
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return malloc(sizeof(struct vt100_headless));
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}
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static void set_non_canonical(struct vt100_headless *this, int fd)
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{
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struct termios termios;
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ioctl(fd, TCGETS, &this->backup);
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ioctl(fd, TCGETS, &termios);
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termios.c_iflag |= ICANON;
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termios.c_cc[VMIN] = 1;
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termios.c_cc[VTIME] = 0;
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ioctl(fd, TCSETS, &termios);
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}
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static void restore_termios(struct vt100_headless *this, int fd)
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{
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ioctl(fd, TCSETS, &this->backup);
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}
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/* static void debug(struct vt100_headless *this, char *title) */
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/* { */
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/* unsigned int argc; */
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/* fprintf(stderr, "%s ", title); */
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/* for (argc = 0; argc < this->term->argc; ++argc) */
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/* { */
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/* fprintf(stderr, "%d", this->term->argv[argc]); */
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/* if (argc != this->term->argc - 1) */
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/* fprintf(stderr, ", "); */
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/* } */
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/* fprintf(stderr, "\n"); */
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/* } */
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#ifndef NDEBUG
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static void strdump(char *str)
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{
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while (*str != '\0')
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{
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if (*str >= ' ' && *str <= '~')
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fprintf(stderr, "%c", *str);
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else
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fprintf(stderr, "\\0%o", *str);
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str += 1;
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}
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fprintf(stderr, "\n");
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}
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#endif
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static int main_loop(struct vt100_headless *this)
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{
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char buffer[4096];
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fd_set rfds;
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int retval;
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ssize_t read_size;
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while (42)
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{
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FD_ZERO(&rfds);
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FD_SET(this->master, &rfds);
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FD_SET(0, &rfds);
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retval = select(this->master + 1, &rfds, NULL, NULL, NULL);
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if (retval == -1)
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{
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perror("select()");
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}
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if (FD_ISSET(0, &rfds))
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{
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read_size = read(0, &buffer, 4096);
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if (read_size == -1)
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{
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perror("read");
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return EXIT_FAILURE;
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}
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buffer[read_size] = '\0';
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write(this->master, buffer, read_size);
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}
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if (FD_ISSET(this->master, &rfds))
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{
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read_size = read(this->master, &buffer, 4096);
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if (read_size == -1)
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{
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perror("read");
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return EXIT_FAILURE;
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}
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buffer[read_size] = '\0';
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#ifndef NDEBUG
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strdump(buffer);
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#endif
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lw_terminal_vt100_read_str(this->term, buffer);
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this->changed(this);
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}
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}
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}
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void master_write(void *user_data, void *buffer, size_t len)
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{
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struct vt100_headless *this;
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this = (struct vt100_headless*)user_data;
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write(this->master, buffer, len);
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}
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void vt100_headless_fork(struct vt100_headless *this,
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const char *progname,
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char *const argv[])
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{
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int child;
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struct winsize winsize;
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set_non_canonical(this, 0);
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winsize.ws_row = 24;
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winsize.ws_col = 24;
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child = forkpty(&this->master, NULL, NULL, NULL);
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if (child == CHILD)
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{
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setsid();
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putenv("TERM=vt100");
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execvp(progname, argv);
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return ;
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}
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else
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{
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this->term = lw_terminal_vt100_init(this, lw_terminal_default_unimplemented);
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this->term->master_write = master_write;
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ioctl(this->master, TIOCSWINSZ, &winsize);
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main_loop(this);
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}
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restore_termios(this, 0);
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}
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