/* * term swallow a terminal-based application * Copyright (c) 2006 Sam Hocevar * All Rights Reserved * * $Id$ * * This program is free software; you can redistribute it and/or * modify it under the terms of the Do What The Fuck You Want To * Public License, Version 2, as published by Sam Hocevar. See * http://sam.zoy.org/wtfpl/COPYING for more details. */ #include "config.h" #include "common.h" #if !defined __KERNEL__ # include # include # include # include # include # include # if defined HAVE_PTY_H # include /* for openpty and forkpty */ # else # include /* for OS X */ # endif #endif #include "cucul.h" #include "caca.h" #define XTAB 3 #define YTAB 2 struct screen { cucul_canvas_t *cv; int fd; unsigned char *buf; long int total; int w, h; }; static int create_pty(char *cmd, unsigned int w, unsigned int h); static int set_tty_size(int fd, unsigned int w, unsigned int h); int main(int argc, char **argv) { static cucul_canvas_t *cv; static caca_display_t *dp; static struct screen *screen; int pty = 0, prevpty = 0, i, n, w, h, eof = 0, refresh = 1, command = 0; if(argc < 2) { fprintf(stderr, "usage: %s [ [ ...]]\n", argv[0]); fprintf(stderr, "eg. \"%s zsh bash\"\n", argv[0]); return 1; } cv = cucul_create_canvas(0, 0); dp = caca_create_display(cv); if(!dp) return 1; n = argc - 1; screen = malloc(n * sizeof(struct screen)); w = cucul_get_canvas_width(cv); h = cucul_get_canvas_height(cv); w = w <= XTAB * n ? 1 : w - XTAB * n; h = h <= YTAB * n ? 1 : h - YTAB * n; for(i = 0; i < n; i++) screen[i].cv = cucul_create_canvas(w, h); cucul_set_color_ansi(cv, CUCUL_LIGHTRED, CUCUL_BLACK); cucul_draw_cp437_box(cv, (n - 1 - pty) * XTAB, pty * YTAB, w + (n - 1 - pty) * XTAB + 1, h + pty * YTAB + 1); caca_refresh_display(dp); for(i = 0; i < n; i++) { screen[i].buf = NULL; screen[i].total = 0; screen[i].fd = create_pty(argv[i + 1], w, h); if(screen[i].fd < 0) return -1; } for(;;) { struct timeval tv; fd_set fdset; caca_event_t ev; int i, maxfd = 0, ret; /* Read data, if any */ FD_ZERO(&fdset); for(i = 0; i < n; i++) { FD_SET(screen[i].fd, &fdset); if(screen[i].fd > maxfd) maxfd = screen[i].fd; } tv.tv_sec = 0; tv.tv_usec = 50000; ret = select(maxfd + 1, &fdset, NULL, NULL, &tv); if(ret < 0) { if(errno == EINTR) ; /* We probably got a SIGWINCH, ignore it */ else { for(i = 0; i < n; i++) if(screen[i].total) break; if(i == n) break; } } else if(ret) for(i = 0; i < n; i++) { if(FD_ISSET(screen[i].fd, &fdset)) { ssize_t n; screen[i].buf = realloc(screen[i].buf, screen[i].total + 4096); n = read(screen[i].fd, screen[i].buf + screen[i].total, 4096); if(n > 0) screen[i].total += n; else if(n == 0 || errno != EWOULDBLOCK) eof = 1; } } for(i = 0; i < n; i++) if(screen[i].total) { unsigned long int bytes; bytes = cucul_import_memory(screen[i].cv, screen[i].buf, screen[i].total, "utf8"); if(bytes > 0) { screen[i].total -= bytes; memmove(screen[i].buf, screen[i].buf + bytes, screen[i].total); refresh = 1; } } /* Get events, if any */ ret = caca_get_event(dp, CACA_EVENT_ANY, &ev, 0); if(ret && (ev.type & CACA_EVENT_KEY_PRESS)) { if(command) { command = 0; switch(ev.data.key.ch) { case CACA_KEY_CTRL_A: pty ^= prevpty; prevpty ^= pty; pty ^= prevpty; refresh = 1; break; case 'n': case ' ': case '\0': case CACA_KEY_CTRL_N: prevpty = pty; pty = (pty + 1) % n; refresh = 1; break; case 'p': case CACA_KEY_CTRL_P: prevpty = pty; pty = (pty + n - 1) % n; refresh = 1; break; } } else { switch(ev.data.key.ch) { case CACA_KEY_CTRL_A: command = 1; break; case CACA_KEY_UP: write(screen[pty].fd, "\x1b[A", 3); break; case CACA_KEY_DOWN: write(screen[pty].fd, "\x1b[B", 3); break; case CACA_KEY_RIGHT: write(screen[pty].fd, "\x1b[C", 3); break; case CACA_KEY_LEFT: write(screen[pty].fd, "\x1b[D", 3); break; default: write(screen[pty].fd, &ev.data.key.ch, 1); break; } } } else if(ret && (ev.type & CACA_EVENT_RESIZE)) { w = cucul_get_canvas_width(cv); h = cucul_get_canvas_height(cv); w = w <= XTAB * n ? 1 : w - XTAB * n; h = h <= YTAB * n ? 1 : h - YTAB * n; for(i = 0; i < n; i++) { cucul_set_canvas_size(screen[i].cv, w, h); set_tty_size(screen[i].fd, w, h); } cucul_clear_canvas(cv); refresh = 1; } /* Refresh screen */ if(refresh) { refresh = 0; for(i = 0; i < n; i++) { int j = (pty + n - 1 - i) % n; cucul_blit(cv, (n - 1 - j) * XTAB + 1, j * YTAB + 1, screen[j].cv, NULL); cucul_draw_cp437_box(cv, (n - 1 - j) * XTAB, j * YTAB, w + (n - 1 - j) * XTAB + 1, h + j * YTAB + 1); } caca_refresh_display(dp); } if(eof) { for(i = 0; i < n; i++) if(screen[i].total) break; if(i == n) break; } } caca_get_event(dp, CACA_EVENT_KEY_PRESS, NULL, -1); /* Clean up */ caca_free_display(dp); cucul_free_canvas(cv); for(i = 0; i < n; i++) cucul_free_canvas(screen[i].cv); return 0; } static int create_pty(char *cmd, unsigned int w, unsigned int h) { char **argv; int fd; pid_t pid; pid = forkpty(&fd, NULL, NULL, NULL); if(pid < 0) { fprintf(stderr, "forkpty() error\n"); return -1; } else if(pid == 0) { set_tty_size(0, w, h); putenv("CACA_DRIVER=slang"); putenv("TERM=xterm"); argv = malloc(2 * sizeof(char *)); argv[0] = cmd; argv[1] = NULL; execvp(cmd, argv); fprintf(stderr, "execvp() error\n"); return -1; } fcntl(fd, F_SETFL, O_NDELAY); return fd; #if 0 fprintf(stderr, "forkpty() not available\n"); return -1; #endif } static int set_tty_size(int fd, unsigned int w, unsigned int h) { struct winsize ws; memset(&ws, 0, sizeof(ws)); ws.ws_row = h; ws.ws_col = w; ioctl(fd, TIOCSWINSZ, (char *)&ws); return 0; }