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 <stdio.h>
  12 #include <signal.h>
  13 #include <sys/ioctl.h>
  14 #include <fcntl.h>
  15 #include <unistd.h>
  16 #include <termios.h>
  17 #include <errno.h>
  18
  19 #include "console.h"
  20 #include "options.h"
  21 #include "debug.h"
  22
  23 char console_xterm_prog[80];
  24
  25 static BOOL32 wine_create_console(FILE **master, FILE **slave, int *pid);
  26 FILE *wine_openpty(int *master, int *slave, char *name,
  27                         struct termios *term, struct winsize *winsize);
  28
  29 /* The console -- I chose to keep the master and slave
  30  * (UNIX) file descriptors around in case they are needed for
  31  * ioctls later.  The pid is needed to destroy the xterm on close
  32  */
  33 typedef struct _XTERM_CONSOLE {
  34         FILE    *master;                 /* xterm side of pty */
  35         FILE    *slave;                  /* wine side of pty */
  36         int     pid;                     /* xterm's pid, -1 if no xterm */
  37 } XTERM_CONSOLE;
  38
  39 static XTERM_CONSOLE xterm_console;
  40
  41 CONSOLE_device chain;
  42 FILE *old_in, *old_out;
  43
  44 void XTERM_Start()
  45 {
  46    /* Here, this is a supplementary driver so we should remember to call
  47       the chain. */
  48    chain.init = driver.init;
  49    driver.init = XTERM_Init;
  50
  51    chain.close = driver.close;
  52    driver.close = XTERM_Close;
  53
  54    chain.resizeScreen = driver.resizeScreen;
  55    driver.resizeScreen = XTERM_ResizeScreen;
  56
  57    /* Read in driver configuration */
  58    PROFILE_GetWineIniString("console", "XtermProg",
  59       "xterm", console_xterm_prog, 79);
  60
  61 }
  62
  63 void XTERM_Init()
  64 {
  65    wine_create_console(&xterm_console.master, &xterm_console.slave,
  66       &xterm_console.pid);
  67
  68    old_in = driver.console_in;
  69    driver.console_in = xterm_console.slave;
  70
  71    old_out = driver.console_out;
  72    driver.console_out = xterm_console.slave;
  73
  74    /* Then call the chain... */
  75    if (chain.init)
  76       chain.init();
  77 }
  78
  79 void XTERM_Close()
  80 {
  81    /* Call the chain first... */
  82    if (chain.close)
  83       chain.close();
  84
  85    driver.console_in = old_in;
  86    driver.console_out = old_out;
  87
  88    /* make sure a xterm exists to kill */
  89    if (xterm_console.pid != -1) {
  90       kill(xterm_console.pid, SIGTERM);
  91    }
  92 }
  93
  94 void XTERM_ResizeScreen(int x, int y)
  95 {
  96    char temp[100];
  97
  98    /* Call the chain first, there shoudln't be any... */
  99    if (chain.resizeScreen)
 100       chain.resizeScreen(x, y);
 101
 102    sprintf(temp, "\x1b[8;%d;%dt", y, x);
 103    CONSOLE_WriteRawString(temp);
 104
 105    CONSOLE_NotifyResizeScreen(x, y);
 106 }
 107
 108
 109 static BOOL32 wine_create_console(FILE **master, FILE **slave, int *pid)
 110 {
 111         /* There is definately a bug in this routine that causes a lot
 112            of garbage to be written to the screen, but I can't find it...
 113         */
 114         struct termios term;
 115         char buf[1024];
 116         char c = '\0';
 117         int status = 0;
 118         int i;
 119         int tmaster, tslave;
 120         char xterm_resolution[10];
 121
 122         sprintf(xterm_resolution, "%dx%d", driver.x_res,
 123            driver.y_res);
 124
 125         if (tcgetattr(0, &term) < 0) return FALSE;
 126         term.c_lflag |= ICANON;
 127         term.c_lflag &= ~ECHO;
 128         if (wine_openpty(&tmaster, &tslave, NULL, &term, NULL) < 0)
 129            return FALSE;
 130         *master = fdopen(tmaster, "r+");
 131         *slave = fdopen(tslave, "r+");
 132
 133         if ((*pid=fork()) == 0) {
 134                 tcsetattr(fileno(*slave), TCSADRAIN, &term);
 135                 sprintf(buf, "-Sxx%d", fileno(*master));
 136                 execlp(console_xterm_prog, console_xterm_prog, buf, "-fg",
 137                    "white", "-bg", "black", "-g",
 138                    xterm_resolution, NULL);
 139                 ERR(console, "error creating xterm (file not found?)\n");
 140                 exit(1);
 141         }
 142
 143         /* most xterms like to print their window ID when used with -S;
 144          * read it and continue before the user has a chance...
 145          * NOTE: this is the reason we started xterm with ECHO off,
 146          * we'll turn it back on below
 147          */
 148
 149         for (i=0; c!='\n'; (status=fread(&c, 1, 1, *slave)), i++) {
 150                 if (status == -1 && c == '\0') {
 151                                 /* wait for xterm to be created */
 152                         usleep(100);
 153                 }
 154                 if (i > 10000) {
 155                         WARN(console, "can't read xterm WID\n");
 156                         kill(*pid, SIGKILL);
 157                         return FALSE;
 158                 }
 159         }
 160         term.c_lflag |= ECHO;
 161         tcsetattr(fileno(*master), TCSADRAIN, &term);
 162
 163         return TRUE;
 164 }