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
  19 #include "console.h"
  20 #include "options.h"
  21 #include "debugtools.h"
  22
  23 DEFAULT_DEBUG_CHANNEL(console);
  24
  25 char console_xterm_prog[80];
  26
  27 static BOOL wine_create_console(FILE **master, FILE **slave, pid_t *pid);
  28 int wine_openpty(int *master, int *slave, char *name,
  29                  struct termios *term, struct winsize *winsize);
  30
  31 /* The console -- I chose to keep the master and slave
  32  * (UNIX) file descriptors around in case they are needed for
  33  * ioctls later.  The pid is needed to destroy the xterm on close
  34  */
  35 typedef struct _XTERM_CONSOLE {
  36         FILE    *master;                 /* xterm side of pty */
  37         FILE    *slave;                  /* wine side of pty */
  38         pid_t    pid;                    /* xterm's pid, -1 if no xterm */
  39 } XTERM_CONSOLE;
  40
  41 static XTERM_CONSOLE xterm_console;
  42
  43 CONSOLE_device chain;
  44 FILE *old_in, *old_out;
  45
  46 void XTERM_Start(void)
  47 {
  48    /* Here, this is a supplementary driver so we should remember to call
  49       the chain. */
  50    chain.init = driver.init;
  51    driver.init = XTERM_Init;
  52
  53    chain.close = driver.close;
  54    driver.close = XTERM_Close;
  55
  56    chain.resizeScreen = driver.resizeScreen;
  57    driver.resizeScreen = XTERM_ResizeScreen;
  58
  59    /* Read in driver configuration */
  60    PROFILE_GetWineIniString("console", "XtermProg",
  61       "xterm", console_xterm_prog, 79);
  62
  63 }
  64
  65 void XTERM_Init()
  66 {
  67    wine_create_console(&xterm_console.master, &xterm_console.slave,
  68       &xterm_console.pid);
  69
  70    old_in = driver.console_in;
  71    driver.console_in = xterm_console.slave;
  72
  73    old_out = driver.console_out;
  74    driver.console_out = xterm_console.slave;
  75
  76    /* Then call the chain... */
  77    if (chain.init)
  78       chain.init();
  79 }
  80
  81 void XTERM_Close()
  82 {
  83    /* Call the chain first... */
  84    if (chain.close)
  85       chain.close();
  86
  87    driver.console_in = old_in;
  88    driver.console_out = old_out;
  89
  90    /* make sure a xterm exists to kill */
  91    if (xterm_console.pid != -1) {
  92       kill(xterm_console.pid, SIGTERM);
  93    }
  94 }
  95
  96 void XTERM_ResizeScreen(int x, int y)
  97 {
  98    char temp[100];
  99
 100    /* Call the chain first, there shoudln't be any... */
 101    if (chain.resizeScreen)
 102       chain.resizeScreen(x, y);
 103
 104    sprintf(temp, "\x1b[8;%d;%dt", y, x);
 105    CONSOLE_WriteRawString(temp);
 106
 107    CONSOLE_NotifyResizeScreen(x, y);
 108 }
 109
 110
 111 static BOOL wine_create_console(FILE **master, FILE **slave, pid_t *pid)
 112 {
 113         /* There is definately a bug in this routine that causes a lot
 114            of garbage to be written to the screen, but I can't find it...
 115         */
 116         struct termios term;
 117         char buf[1024];
 118         char c = '\0';
 119         int status = 0;
 120         int i;
 121         int tmaster, tslave;
 122         char xterm_resolution[10];
 123
 124         sprintf(xterm_resolution, "%dx%d", driver.x_res,
 125            driver.y_res);
 126
 127         if (tcgetattr(0, &term) < 0) return FALSE;
 128         term.c_lflag |= ICANON;
 129         term.c_lflag &= ~ECHO;
 130         if (wine_openpty(&tmaster, &tslave, NULL, &term, NULL) < 0)
 131            return FALSE;
 132         *master = fdopen(tmaster, "r+");
 133         *slave = fdopen(tslave, "r+");
 134
 135         if ((*pid=fork()) == 0) {
 136                 tcsetattr(fileno(*slave), TCSADRAIN, &term);
 137                 sprintf(buf, "-Sxx%d", fileno(*master));
 138                 execlp(console_xterm_prog, console_xterm_prog, buf, "-fg",
 139                    "white", "-bg", "black", "-g",
 140                    xterm_resolution, NULL);
 141                 ERR("error creating xterm (file not found?)\n");
 142                 exit(1);
 143         }
 144
 145         /* most xterms like to print their window ID when used with -S;
 146          * read it and continue before the user has a chance...
 147          * NOTE: this is the reason we started xterm with ECHO off,
 148          * we'll turn it back on below
 149          */
 150
 151         for (i=0; c!='\n'; (status=fread(&c, 1, 1, *slave)), i++) {
 152                 if (status == -1 && c == '\0') {
 153                                 /* wait for xterm to be created */
 154                         usleep(100);
 155                 }
 156                 if (i > 10000) {
 157                         WARN("can't read xterm WID\n");
 158                         kill(*pid, SIGKILL);
 159                         return FALSE;
 160                 }
 161         }
 162         term.c_lflag |= ECHO;
 163         tcsetattr(fileno(*master), TCSADRAIN, &term);
 164
 165         return TRUE;
 166 }