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