console/xterm.c

   1 /* xterm.c */
   2
   3 /* This "driver" is designed to go on top of an existing driver
   4    to provide support for features only present if using an
   5    xterm or compatible program for your console output.
   6    Currently, it supports resizing and separating debug messages from
   7    program output.
   8    It does not currently support changing the title bar.
   9 */
  10
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <signal.h>
  14 #include <sys/ioctl.h>
  15 #include <fcntl.h>
  16 #include <unistd.h>
  17 #include <termios.h>
  18 #include <errno.h>
  19
  20 #include "console.h"
  21 #include "options.h"
  22 #include "debug.h"
  23
  24 char console_xterm_prog[80];
  25
  26 static BOOL wine_create_console(FILE **master, FILE **slave, int *pid);
  27 FILE *wine_openpty(int *master, int *slave, char *name,
  28                         struct termios *term, struct winsize *winsize);
  29
  30 /* The console -- I chose to keep the master and slave
  31  * (UNIX) file descriptors around in case they are needed for
  32  * ioctls later.  The pid is needed to destroy the xterm on close
  33  */
  34 typedef struct _XTERM_CONSOLE {
  35         FILE    *master;                 /* xterm side of pty */
  36         FILE    *slave;                  /* wine side of pty */
  37         int     pid;                     /* xterm's pid, -1 if no xterm */
  38 } XTERM_CONSOLE;
  39
  40 static XTERM_CONSOLE xterm_console;
  41
  42 CONSOLE_device chain;
  43 FILE *old_in, *old_out;
  44
  45 void XTERM_Start()
  46 {
  47    /* Here, this is a supplementary driver so we should remember to call
  48       the chain. */
  49    chain.init = driver.init;
  50    driver.init = XTERM_Init;
  51
  52    chain.close = driver.close;
  53    driver.close = XTERM_Close;
  54
  55    chain.resizeScreen = driver.resizeScreen;
  56    driver.resizeScreen = XTERM_ResizeScreen;
  57
  58    /* Read in driver configuration */
  59    PROFILE_GetWineIniString("console", "XtermProg",
  60       "xterm", console_xterm_prog, 79);
  61
  62 }
  63
  64 void XTERM_Init()
  65 {
  66    wine_create_console(&xterm_console.master, &xterm_console.slave,
  67       &xterm_console.pid);
  68
  69    old_in = driver.console_in;
  70    driver.console_in = xterm_console.slave;
  71
  72    old_out = driver.console_out;
  73    driver.console_out = xterm_console.slave;
  74
  75    /* Then call the chain... */
  76    if (chain.init)
  77       chain.init();
  78 }
  79
  80 void XTERM_Close()
  81 {
  82    /* Call the chain first... */
  83    if (chain.close)
  84       chain.close();
  85
  86    driver.console_in = old_in;
  87    driver.console_out = old_out;
  88
  89    /* make sure a xterm exists to kill */
  90    if (xterm_console.pid != -1) {
  91       kill(xterm_console.pid, SIGTERM);
  92    }
  93 }
  94
  95 void XTERM_ResizeScreen(int x, int y)
  96 {
  97    char temp[100];
  98
  99    /* Call the chain first, there shoudln't be any... */
 100    if (chain.resizeScreen)
 101       chain.resizeScreen(x, y);
 102
 103    sprintf(temp, "\x1b[8;%d;%dt", y, x);
 104    CONSOLE_WriteRawString(temp);
 105
 106    CONSOLE_NotifyResizeScreen(x, y);
 107 }
 108
 109
 110 static BOOL wine_create_console(FILE **master, FILE **slave, int *pid)
 111 {
 112         /* There is definately a bug in this routine that causes a lot
 113            of garbage to be written to the screen, but I can't find it...
 114         */
 115         struct termios term;
 116         char buf[1024];
 117         char c = '\0';
 118         int status = 0;
 119         int i;
 120         int tmaster, tslave;
 121         char xterm_resolution[10];
 122
 123         sprintf(xterm_resolution, "%dx%d", driver.x_res,
 124            driver.y_res);
 125
 126         if (tcgetattr(0, &term) < 0) return FALSE;
 127         term.c_lflag |= ICANON;
 128         term.c_lflag &= ~ECHO;
 129         if (wine_openpty(&tmaster, &tslave, NULL, &term, NULL) < 0)
 130            return FALSE;
 131         *master = fdopen(tmaster, "r+");
 132         *slave = fdopen(tslave, "r+");
 133
 134         if ((*pid=fork()) == 0) {
 135                 tcsetattr(fileno(*slave), TCSADRAIN, &term);
 136                 sprintf(buf, "-Sxx%d", fileno(*master));
 137                 execlp(console_xterm_prog, console_xterm_prog, buf, "-fg",
 138                    "white", "-bg", "black", "-g",
 139                    xterm_resolution, NULL);
 140                 ERR(console, "error creating xterm (file not found?)\n");
 141                 exit(1);
 142         }
 143
 144         /* most xterms like to print their window ID when used with -S;
 145          * read it and continue before the user has a chance...
 146          * NOTE: this is the reason we started xterm with ECHO off,
 147          * we'll turn it back on below
 148          */
 149
 150         for (i=0; c!='\n'; (status=fread(&c, 1, 1, *slave)), i++) {
 151                 if (status == -1 && c == '\0') {
 152                                 /* wait for xterm to be created */
 153                         usleep(100);
 154                 }
 155                 if (i > 10000) {
 156                         WARN(console, "can't read xterm WID\n");
 157                         kill(*pid, SIGKILL);
 158                         return FALSE;
 159                 }
 160         }
 161         term.c_lflag |= ECHO;
 162         tcsetattr(fileno(*master), TCSADRAIN, &term);
 163
 164         return TRUE;
 165 }