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