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 "config.h"
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <signal.h>
  16 #include <sys/ioctl.h>
  17 #include <fcntl.h>
  18 #include <unistd.h>
  19 #include <termios.h>
  20
  21 #include "console.h"
  22 #include "options.h"
  23 #include "debugtools.h"
  24
  25 DEFAULT_DEBUG_CHANNEL(console);
  26
  27 char console_xterm_prog[80];
  28
  29 static BOOL wine_create_console(FILE **master, FILE **slave, pid_t *pid);
  30 int wine_openpty(int *master, int *slave, char *name,
  31                  struct termios *term, struct winsize *winsize);
  32
  33 /* The console -- I chose to keep the master and slave
  34  * (UNIX) file descriptors around in case they are needed for
  35  * ioctls later.  The pid is needed to destroy the xterm on close
  36  */
  37 typedef struct _XTERM_CONSOLE {
  38         FILE    *master;                 /* xterm side of pty */
  39         FILE    *slave;                  /* wine side of pty */
  40         pid_t    pid;                    /* xterm's pid, -1 if no xterm */
  41 } XTERM_CONSOLE;
  42
  43 static XTERM_CONSOLE xterm_console;
  44
  45 CONSOLE_device chain;
  46 FILE *old_in, *old_out;
  47
  48 void XTERM_Start(void)
  49 {
  50    /* Here, this is a supplementary driver so we should remember to call
  51       the chain. */
  52    chain.init = driver.init;
  53    driver.init = XTERM_Init;
  54
  55    chain.close = driver.close;
  56    driver.close = XTERM_Close;
  57
  58    chain.resizeScreen = driver.resizeScreen;
  59    driver.resizeScreen = XTERM_ResizeScreen;
  60
  61    /* Read in driver configuration */
  62    PROFILE_GetWineIniString("console", "XtermProg",
  63       "xterm", console_xterm_prog, 79);
  64
  65 }
  66
  67 void XTERM_Init()
  68 {
  69    wine_create_console(&xterm_console.master, &xterm_console.slave,
  70       &xterm_console.pid);
  71
  72    old_in = driver.console_in;
  73    driver.console_in = xterm_console.slave;
  74
  75    old_out = driver.console_out;
  76    driver.console_out = xterm_console.slave;
  77
  78    /* Then call the chain... */
  79    if (chain.init)
  80       chain.init();
  81 }
  82
  83 void XTERM_Close()
  84 {
  85    /* Call the chain first... */
  86    if (chain.close)
  87       chain.close();
  88
  89    driver.console_in = old_in;
  90    driver.console_out = old_out;
  91
  92    /* make sure a xterm exists to kill */
  93    if (xterm_console.pid != -1) {
  94       kill(xterm_console.pid, SIGTERM);
  95    }
  96 }
  97
  98 void XTERM_ResizeScreen(int x, int y)
  99 {
 100    char temp[100];
 101
 102    /* Call the chain first, there shoudln't be any... */
 103    if (chain.resizeScreen)
 104       chain.resizeScreen(x, y);
 105
 106    sprintf(temp, "\x1b[8;%d;%dt", y, x);
 107    CONSOLE_WriteRawString(temp);
 108
 109    CONSOLE_NotifyResizeScreen(x, y);
 110 }
 111
 112
 113 static BOOL wine_create_console(FILE **master, FILE **slave, pid_t *pid)
 114 {
 115         /* There is definately a bug in this routine that causes a lot
 116            of garbage to be written to the screen, but I can't find it...
 117         */
 118         struct termios term;
 119         char buf[1024];
 120         char c = '\0';
 121         int status = 0;
 122         int i;
 123         int tmaster, tslave;
 124         char xterm_resolution[10];
 125
 126         sprintf(xterm_resolution, "%dx%d", driver.x_res,
 127            driver.y_res);
 128
 129         if (tcgetattr(0, &term) < 0) return FALSE;
 130         term.c_lflag |= ICANON;
 131         term.c_lflag &= ~ECHO;
 132         if (wine_openpty(&tmaster, &tslave, NULL, &term, NULL) < 0)
 133            return FALSE;
 134         *master = fdopen(tmaster, "r+");
 135         *slave = fdopen(tslave, "r+");
 136
 137         if ((*pid=fork()) == 0) {
 138                 tcsetattr(fileno(*slave), TCSADRAIN, &term);
 139                 sprintf(buf, "-Sxx%d", fileno(*master));
 140                 execlp(console_xterm_prog, console_xterm_prog, buf, "-fg",
 141                    "white", "-bg", "black", "-g",
 142                    xterm_resolution, NULL);
 143                 ERR("error creating xterm (file not found?)\n");
 144                 exit(1);
 145         }
 146
 147         /* most xterms like to print their window ID when used with -S;
 148          * read it and continue before the user has a chance...
 149          * NOTE: this is the reason we started xterm with ECHO off,
 150          * we'll turn it back on below
 151          */
 152
 153         for (i=0; c!='\n'; (status=fread(&c, 1, 1, *slave)), i++) {
 154                 if (status == -1 && c == '\0') {
 155                                 /* wait for xterm to be created */
 156                         usleep(100);
 157                 }
 158                 if (i > 10000) {
 159                         WARN("can't read xterm WID\n");
 160                         kill(*pid, SIGKILL);
 161                         return FALSE;
 162                 }
 163         }
 164         term.c_lflag |= ECHO;
 165         tcsetattr(fileno(*master), TCSADRAIN, &term);
 166
 167         return TRUE;
 168 }