Copyright © 2006 Pierre Habouzit
*/
+#include <errno.h>
#include <stdlib.h>
-#ifdef USE_PTY
-#include <pty.h>
-#endif
+#include <fcntl.h>
#include <stdio.h>
#include <string.h>
+#include <sys/ioctl.h>
#include "madtty.h"
#include "roteprivate.h"
#define ROTE_VT_UPDATE_ITERATIONS 5
-RoteTerm *rote_vt_create(int rows, int cols) {
- RoteTerm *rt;
- int i, j;
+RoteTerm *rote_vt_create(int rows, int cols)
+{
+ RoteTerm *rt;
+ int i, j;
- if (rows <= 0 || cols <= 0) return NULL;
+ if (rows <= 0 || cols <= 0)
+ return NULL;
- if (! (rt = (RoteTerm*) malloc(sizeof(RoteTerm))) ) return NULL;
- memset(rt, 0, sizeof(RoteTerm));
+ rt = (RoteTerm*)calloc(sizeof(RoteTerm), 1);
+ if (!rt)
+ return NULL;
- /* record dimensions */
- rt->rows = rows;
- rt->cols = cols;
+ /* record dimensions */
+ rt->rows = rows;
+ rt->cols = cols;
- /* default mode is replace */
- rt->insert = false;
+ /* default mode is replace */
+ rt->insert = false;
- /* create the cell matrix */
- rt->cells = (RoteCell**) malloc(sizeof(RoteCell*) * rt->rows);
- for (i = 0; i < rt->rows; i++) {
- /* create row */
- rt->cells[i] = (RoteCell*) malloc(sizeof(RoteCell) * rt->cols);
+ /* create the cell matrix */
+ rt->cells = (RoteCell**) malloc(sizeof(RoteCell*) * rt->rows);
+ for (i = 0; i < rt->rows; i++) {
+ /* create row */
+ rt->cells[i] = (RoteCell*) malloc(sizeof(RoteCell) * rt->cols);
- /* fill row with spaces */
- for (j = 0; j < rt->cols; j++) {
- rt->cells[i][j].ch = 0x20; /* a space */
- rt->cells[i][j].attr = 0x70; /* white text, black background */
- }
- }
-
- /* allocate dirtiness array */
- rt->line_dirty = (bool*) malloc(sizeof(bool) * rt->rows);
+ /* fill row with spaces */
+ for (j = 0; j < rt->cols; j++) {
+ rt->cells[i][j].ch = 0x20; /* a space */
+ rt->cells[i][j].attr = 0x70; /* white text, black background */
+ }
+ }
- /* initialization of other public fields */
- rt->crow = rt->ccol = 0;
- rt->curattr = 0x70; /* white text over black background */
+ /* allocate dirtiness array */
+ rt->line_dirty = (bool*)calloc(sizeof(bool), rt->rows);
- /* allocate private data */
- rt->pd = (RoteTermPrivate*) malloc(sizeof(RoteTermPrivate));
- memset(rt->pd, 0, sizeof(RoteTermPrivate));
+ /* initialization of other public fields */
+ rt->crow = rt->ccol = 0;
+ rt->curattr = 0x70; /* white text over black background */
- rt->pd->pty = -1; /* no pty for now */
+ /* allocate private data */
+ rt->pd = (RoteTermPrivate*)calloc(sizeof(RoteTermPrivate), 1);
- /* initial scrolling area is the whole window */
- rt->pd->scrolltop = 0;
- rt->pd->scrollbottom = rt->rows - 1;
+ rt->pty = -1; /* no pty for now */
- #ifdef DEBUG
- fprintf(stderr, "Created a %d x %d terminal.\n", rt->rows, rt->cols);
- #endif
-
- return rt;
-}
+ /* initial scrolling area is the whole window */
+ rt->pd->scrolltop = 0;
+ rt->pd->scrollbottom = rt->rows - 1;
-void rote_vt_destroy(RoteTerm *rt) {
- int i;
- if (!rt) return;
+ return rt;
+}
- free(rt->pd);
- free(rt->line_dirty);
- for (i = 0; i < rt->rows; i++) free(rt->cells[i]);
- free(rt->cells);
- free(rt);
+void rote_vt_destroy(RoteTerm *rt)
+{
+ int i;
+ if (!rt)
+ return;
+
+ free(rt->pd);
+ free(rt->line_dirty);
+ for (i = 0; i < rt->rows; i++) {
+ free(rt->cells[i]);
+ }
+ free(rt->cells);
+ free(rt);
}
#ifdef USE_NCURSES
-static void default_cur_set_attr(WINDOW *win, unsigned char attr) {
- int cp = ROTE_ATTR_BG(attr) * 8 + 7 - ROTE_ATTR_FG(attr);
- if (!cp) wattrset(win, A_NORMAL);
- else wattrset(win, COLOR_PAIR(cp));
+static void default_cur_set_attr(WINDOW *win, unsigned char attr)
+{
+ int cp = ROTE_ATTR_BG(attr) * 8 + 7 - ROTE_ATTR_FG(attr);
+ if (!cp) wattrset(win, A_NORMAL);
+ else wattrset(win, COLOR_PAIR(cp));
- if (ROTE_ATTR_BOLD(attr)) wattron(win, A_BOLD);
- if (ROTE_ATTR_BLINK(attr)) wattron(win, A_BLINK);
+ if (ROTE_ATTR_BOLD(attr)) wattron(win, A_BOLD);
+ if (ROTE_ATTR_BLINK(attr)) wattron(win, A_BLINK);
}
-#endif
+static inline unsigned char ensure_printable(unsigned char ch)
+{
+ return ch >= 32 ? ch : 32;
+}
-static inline unsigned char ensure_printable(unsigned char ch)
- { return ch >= 32 ? ch : 32; }
+void rote_vt_draw(RoteTerm *rt, WINDOW *win, int srow, int scol,
+ void (*cur_set_attr)(WINDOW*,unsigned char)) {
-#ifdef USE_NCURSES
+ int i, j;
+ rote_vt_update(rt);
-void rote_vt_draw(RoteTerm *rt, WINDOW *win, int srow, int scol,
- void (*cur_set_attr)(WINDOW*,unsigned char)) {
-
- int i, j;
- rote_vt_update(rt);
-
- if (!cur_set_attr) cur_set_attr = default_cur_set_attr;
- for (i = 0; i < rt->rows; i++) {
- wmove(win, srow + i, scol);
- for (j = 0; j < rt->cols; j++) {
- (*cur_set_attr)(win, rt->cells[i][j].attr);
- waddch(win, ensure_printable(rt->cells[i][j].ch));
- }
- }
+ if (!cur_set_attr) cur_set_attr = default_cur_set_attr;
+ for (i = 0; i < rt->rows; i++) {
+ wmove(win, srow + i, scol);
+ for (j = 0; j < rt->cols; j++) {
+ (*cur_set_attr)(win, rt->cells[i][j].attr);
+ waddch(win, ensure_printable(rt->cells[i][j].ch));
+ }
+ }
- wmove(win, srow + rt->crow, scol + rt->ccol);
+ wmove(win, srow + rt->crow, scol + rt->ccol);
}
#endif
-#ifdef USE_PTY
-
-pid_t rote_vt_forkpty(RoteTerm *rt, const char *command) {
- struct winsize ws;
- pid_t childpid;
-
- ws.ws_row = rt->rows;
- ws.ws_col = rt->cols;
- ws.ws_xpixel = ws.ws_ypixel = 0;
-
- childpid = forkpty(&rt->pd->pty, NULL, NULL, &ws);
- if (childpid < 0) return -1;
+/******************************************************/
+
+#define PTYCHAR1 "pqrstuvwxyz"
+#define PTYCHAR2 "0123456789abcdef"
+
+/* allocate one pty/tty pair */
+static int get_pty(char *tty_str)
+{
+ int fd;
+ char ptydev[] = "/dev/pty??";
+ char ttydev[] = "/dev/tty??";
+ int len = strlen(ttydev);
+ const char *c1, *c2;
+
+ for (c1 = PTYCHAR1; *c1; c1++) {
+ ptydev[len-2] = ttydev[len-2] = *c1;
+ for (c2 = PTYCHAR2; *c2; c2++) {
+ ptydev[len-1] = ttydev[len-1] = *c2;
+ if ((fd = open(ptydev, O_RDWR)) >= 0) {
+ if (access(ttydev, R_OK|W_OK) == 0) {
+ strcpy(tty_str, ttydev);
+ return fd;
+ }
+ close(fd);
+ }
+ }
+ }
+ return -1;
+}
- if (childpid == 0) {
- /* we are the child, running under the slave side of the pty. */
+static int
+run_process(const char *path, const char **argv, int *fd_ptr, int *pid_ptr)
+{
+ int pty_fd, pid, i, nb_fds;
+ char tty_name[32];
+ struct winsize ws;
+
+ pty_fd = get_pty(tty_name);
+ if (pty_fd < 0)
+ return -1;
+
+ fcntl(pty_fd, F_SETFL, O_NONBLOCK);
+
+ /* set dummy screen size */
+ ws.ws_col = 80;
+ ws.ws_row = 25;
+ ws.ws_xpixel = ws.ws_col;
+ ws.ws_ypixel = ws.ws_row;
+ ioctl(pty_fd, TIOCSWINSZ, &ws);
+
+ pid = fork();
+ if (pid < 0)
+ return -1;
+
+ if (pid == 0) {
+ /* child process */
+ nb_fds = getdtablesize();
+ for (i = 0; i < nb_fds; i++)
+ close(i);
+ /* open pseudo tty for standard i/o */
+ open(tty_name, O_RDWR);
+ dup(0);
+ dup(0);
+
+ setsid();
+
+ setenv("TERM", "linux", 1);
+ execv(path, (char *const*)argv);
+ fprintf(stderr, "\nexecv() failed.\nCommand: '%s'\n", argv[0]);
+ exit(1);
+ }
+ /* return file info */
+ *fd_ptr = pty_fd;
+ *pid_ptr = pid;
+ return 0;
+}
- /* Cajole application into using linux-console-compatible escape
- * sequences (which is what we are prepared to interpret) */
- setenv("TERM", "linux", 1);
+pid_t rote_vt_forkpty(RoteTerm *rt, const char *path, const char *argv[])
+{
+ struct winsize ws;
- /* Now we will exec /bin/sh -c command. */
- execl("/bin/sh", "/bin/sh", "-c", command, NULL);
+ ws.ws_row = rt->rows;
+ ws.ws_col = rt->cols;
+ ws.ws_xpixel = ws.ws_ypixel = 0;
- fprintf(stderr, "\nexecl() failed.\nCommand: '%s'\n", command);
- exit(127); /* error exec'ing */
- }
+ if (run_process(path, argv, &rt->pty, &rt->childpid)) {
+ return -1;
+ }
- /* if we got here we are the parent process */
- rt->childpid = childpid;
- return childpid;
+ ioctl(rt->pty, TIOCSWINSZ, &ws);
+ return rt->childpid;
}
-void rote_vt_forsake_child(RoteTerm *rt) {
- if (rt->pd->pty >= 0) close(rt->pd->pty);
- rt->pd->pty = -1;
- rt->childpid = 0;
+void rote_vt_forsake_child(RoteTerm *rt)
+{
+ if (rt->pty >= 0)
+ close(rt->pty);
+ rt->pty = -1;
+ rt->childpid = 0;
}
-#endif
-
-void rote_vt_update(RoteTerm *rt) {
- fd_set ifs;
- struct timeval tvzero;
- char buf[512];
- int bytesread;
- int n = ROTE_VT_UPDATE_ITERATIONS;
- if (rt->pd->pty < 0) return; /* nothing to pump */
-
- while (n--) { /* iterate at most ROVE_VT_UPDATE_ITERATIONS times.
- * As Phil Endecott pointed out, if we don't restrict this,
- * a program that floods the terminal with output
- * could cause this loop to iterate forever, never
- * being able to catch up. So we'll rely on the client
- * calling rote_vt_update often, as the documentation
- * recommends :-) */
-
- /* check if pty has something to say */
- FD_ZERO(&ifs); FD_SET(rt->pd->pty, &ifs);
- tvzero.tv_sec = 0; tvzero.tv_usec = 0;
-
- if (select(rt->pd->pty + 1, &ifs, NULL, NULL, &tvzero) <= 0)
- return; /* nothing to read, or select() failed */
-
- /* read what we can. This is guaranteed not to block, since
- * select() told us there was something to read. */
- bytesread = read(rt->pd->pty, buf, 512);
- if (bytesread <= 0) return;
-
- /* inject the data into the terminal */
- rote_vt_inject(rt, buf, bytesread);
- }
+void rote_vt_update(RoteTerm *rt)
+{
+ char buf[512];
+ int nbread;
+ int n = ROTE_VT_UPDATE_ITERATIONS;
+
+ while (n--) { /* iterate at most ROVE_VT_UPDATE_ITERATIONS times.
+ * As Phil Endecott pointed out, if we don't restrict this,
+ * a program that floods the terminal with output
+ * could cause this loop to iterate forever, never
+ * being able to catch up. So we'll rely on the client
+ * calling rote_vt_update often, as the documentation
+ * recommends :-) */
+
+ nbread = rote_vt_read(rt, buf, sizeof(buf));
+ if (nbread <= 0)
+ return;
+
+ /* inject the data into the terminal */
+ rote_vt_inject(rt, buf, nbread);
+ }
}
-void rote_vt_write(RoteTerm *rt, const char *data, int len) {
- if (rt->pd->pty < 0) {
- /* no pty, so just inject the data plain and simple */
- rote_vt_inject(rt, data, len);
- return;
- }
+int rote_vt_read(RoteTerm *rt, char *buf, int buflen)
+{
+ if (rt->pty < 0) {
+ errno = EINVAL;
+ return -1;
+ }
- /* write data to pty. Keep calling write() until we have written
- * everything. */
- while (len > 0) {
- int byteswritten = write(rt->pd->pty, data, len);
- if (byteswritten < 0) {
- /* very ugly way to inform the error. Improvements welcome! */
- static char errormsg[] = "\n(ROTE: pty write() error)\n";
- rote_vt_inject(rt, errormsg, strlen(errormsg));
- return;
- }
-
- data += byteswritten;
- len -= byteswritten;
- }
+ return read(rt->pty, buf, buflen);
}
-void rote_vt_install_handler(RoteTerm *rt, rote_es_handler_t handler) {
- rt->pd->handler = handler;
+void rote_vt_write(RoteTerm *rt, const char *data, int len)
+{
+ if (rt->pty < 0) {
+ /* no pty, so just inject the data plain and simple */
+ rote_vt_inject(rt, data, len);
+ return;
+ }
+
+ /* write data to pty. Keep calling write() until we have written
+ * everything. */
+ while (len > 0) {
+ int byteswritten = write(rt->pty, data, len);
+ if (byteswritten < 0) {
+ /* very ugly way to inform the error. Improvements welcome! */
+ static char errormsg[] = "\n(ROTE: pty write() error)\n";
+ rote_vt_inject(rt, errormsg, strlen(errormsg));
+ return;
+ }
+
+ data += byteswritten;
+ len -= byteswritten;
+ }
}
-void *rote_vt_take_snapshot(RoteTerm *rt) {
- int i;
- int bytes_per_row = sizeof(RoteCell) * rt->cols;
- void *buf = malloc(bytes_per_row * rt->rows);
- void *ptr = buf;
+void *rote_vt_take_snapshot(RoteTerm *rt)
+{
+ const int bytes_per_row = sizeof(RoteCell) * rt->cols;
+ void *buf = malloc(bytes_per_row * rt->rows);
+ void *ptr = buf;
+ int i;
- for (i = 0; i < rt->rows; i++, ptr += bytes_per_row)
- memcpy(ptr, rt->cells[i], bytes_per_row);
+ for (i = 0; i < rt->rows; i++, ptr += bytes_per_row)
+ memcpy(ptr, rt->cells[i], bytes_per_row);
- return buf;
+ return buf;
}
-void rote_vt_restore_snapshot(RoteTerm *rt, void *snapbuf) {
- int i;
- int bytes_per_row = sizeof(RoteCell) * rt->cols;
+void rote_vt_restore_snapshot(RoteTerm *rt, void *snapbuf)
+{
+ const int bytes_per_row = sizeof(RoteCell) * rt->cols;
- for (i = 0; i < rt->rows; i++, snapbuf += bytes_per_row) {
- rt->line_dirty[i] = true;
- memcpy(rt->cells[i], snapbuf, bytes_per_row);
- }
-}
+ int i;
-int rote_vt_get_pty_fd(RoteTerm *rt) {
- return rt->pd->pty;
+ for (i = 0; i < rt->rows; i++, snapbuf += bytes_per_row) {
+ rt->line_dirty[i] = true;
+ memcpy(rt->cells[i], snapbuf, bytes_per_row);
+ }
}
static const char *keytable[KEY_MAX+1];
-static int initialized = 0;
-
-static void keytable_init();
-void rote_vt_keypress(RoteTerm *rt, int keycode) {
- char c = (char) keycode;
+static void keytable_init()
+{
+ memset(keytable, 0, KEY_MAX+1 * sizeof(const char*));
+
+ keytable['\n'] = "\r";
+ keytable[KEY_UP] = "\e[A";
+ keytable[KEY_DOWN] = "\e[B";
+ keytable[KEY_RIGHT] = "\e[C";
+ keytable[KEY_LEFT] = "\e[D";
+ keytable[KEY_BACKSPACE] = "\b";
+ keytable[KEY_HOME] = "\e[1~";
+ keytable[KEY_IC] = "\e[2~";
+ keytable[KEY_DC] = "\e[3~";
+ keytable[KEY_END] = "\e[4~";
+ keytable[KEY_PPAGE] = "\e[5~";
+ keytable[KEY_NPAGE] = "\e[6~";
+ keytable[KEY_SUSPEND] = "\x1A"; /* Ctrl+Z gets mapped to this */
+ keytable[KEY_F(1)] = "\e[[A";
+ keytable[KEY_F(2)] = "\e[[B";
+ keytable[KEY_F(3)] = "\e[[C";
+ keytable[KEY_F(4)] = "\e[[D";
+ keytable[KEY_F(5)] = "\e[[E";
+ keytable[KEY_F(6)] = "\e[17~";
+ keytable[KEY_F(7)] = "\e[18~";
+ keytable[KEY_F(8)] = "\e[19~";
+ keytable[KEY_F(9)] = "\e[20~";
+ keytable[KEY_F(10)] = "\e[21~";
+}
- if (!initialized) keytable_init();
+void rote_vt_keypress(RoteTerm *rt, int keycode)
+{
+ char c = (char) keycode;
- if (keycode >= 0 && keycode < KEY_MAX && keytable[keycode])
- rote_vt_write(rt, keytable[keycode], strlen(keytable[keycode]));
- else
- rote_vt_write(rt, &c, 1); /* not special, just write it */
-}
+ if (keytable['\n'] == NULL)
+ keytable_init();
-static void keytable_init() {
- initialized = 1;
- memset(keytable, 0, KEY_MAX+1 * sizeof(const char*));
-
- keytable['\n'] = "\r";
- keytable[KEY_UP] = "\e[A";
- keytable[KEY_DOWN] = "\e[B";
- keytable[KEY_RIGHT] = "\e[C";
- keytable[KEY_LEFT] = "\e[D";
- keytable[KEY_BACKSPACE] = "\b";
- keytable[KEY_HOME] = "\e[1~";
- keytable[KEY_IC] = "\e[2~";
- keytable[KEY_DC] = "\e[3~";
- keytable[KEY_END] = "\e[4~";
- keytable[KEY_PPAGE] = "\e[5~";
- keytable[KEY_NPAGE] = "\e[6~";
- keytable[KEY_SUSPEND] = "\x1A"; /* Ctrl+Z gets mapped to this */
- keytable[KEY_F(1)] = "\e[[A";
- keytable[KEY_F(2)] = "\e[[B";
- keytable[KEY_F(3)] = "\e[[C";
- keytable[KEY_F(4)] = "\e[[D";
- keytable[KEY_F(5)] = "\e[[E";
- keytable[KEY_F(6)] = "\e[17~";
- keytable[KEY_F(7)] = "\e[18~";
- keytable[KEY_F(8)] = "\e[19~";
- keytable[KEY_F(9)] = "\e[20~";
- keytable[KEY_F(10)] = "\e[21~";
+ if (keycode >= 0 && keycode < KEY_MAX && keytable[keycode]) {
+ rote_vt_write(rt, keytable[keycode], strlen(keytable[keycode]));
+ } else {
+ rote_vt_write(rt, &c, 1); /* not special, just write it */
+ }
}
-
projects / apps / madtty.git / blobdiff