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misc.c
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misc.c
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/*
* $XConsortium: misc.c /main/112 1996/11/29 10:34:07 swick $
* $XFree86: xc/programs/xterm/misc.c,v 3.49 2000/02/29 03:09:27 dawes Exp $
*/
/*
*
* Copyright 1999-2000 by Thomas E. Dickey <dickey@clark.net>
*
* All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the name(s) of the above copyright
* holders shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization.
*
*
* Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of Digital Equipment
* Corporation not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
*
*
* DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#include <xterm.h>
#include <X11/Xos.h>
#include <stdio.h>
#include <signal.h>
#include <ctype.h>
#include <pwd.h>
#include <X11/Xatom.h>
#include <X11/cursorfont.h>
#include <X11/Shell.h>
#include <X11/Xmu/Error.h>
#include <X11/Xmu/SysUtil.h>
#include <X11/Xmu/WinUtil.h>
#include <data.h>
#include <error.h>
#include <menu.h>
#include <fontutils.h>
#include <xcharmouse.h>
#if (XtSpecificationRelease < 6)
#ifndef X_GETTIMEOFDAY
#define X_GETTIMEOFDAY(t) gettimeofday(t,(struct timezone *)0)
#endif
#endif
#ifdef AMOEBA
#include <amoeba.h>
#include <module/proc.h>
#endif
#ifdef __EMX__
#define environ gblenvp /* circumvent a bug */
#endif
#ifdef VMS
#define XTERM_VMS_LOGFILE "SYS$SCRATCH:XTERM_LOG.TXT"
#ifdef ALLOWLOGFILEEXEC
#undef ALLOWLOGFILEEXEC
#endif
#endif /* VMS */
extern char **environ; /* used in 'xtermSetenv()' */
#if OPT_TEK4014
#define OUR_EVENT(event,Type) \
(event.type == Type && \
(event.xcrossing.window == XtWindow(XtParent(term)) || \
(tekWidget && \
event.xcrossing.window == XtWindow(XtParent(tekWidget)))))
#else
#define OUR_EVENT(event,Type) \
(event.type == Type && \
(event.xcrossing.window == XtWindow(XtParent(term))))
#endif
static Boolean ChangeColorsRequest (XtermWidget pTerm, int start, char *names, int final);
static void DoSpecialEnterNotify (XEnterWindowEvent *ev);
static void DoSpecialLeaveNotify (XEnterWindowEvent *ev);
static void selectwindow (TScreen *screen, int flag);
static void unselectwindow (TScreen *screen, int flag);
void
do_xevents(void)
{
register TScreen *screen = &term->screen;
if (XtAppPending(app_con)
||
#if defined(VMS) || defined(__VMS)
screen->display->qlen > 0
#else
GetBytesAvailable (ConnectionNumber(screen->display)) > 0
#endif
)
xevents();
}
void
xevents(void)
{
XEvent event;
XtInputMask input_mask;
register TScreen *screen = &term->screen;
if(screen->scroll_amt)
FlushScroll(screen);
/*
* process timeouts, relying on the fact that XtAppProcessEvent
* will process the timeout and return without blockng on the
* XEvent queue. Other sources i.e. the pty are handled elsewhere
* with select().
*/
while ((input_mask = XtAppPending(app_con)) & XtIMTimer)
XtAppProcessEvent(app_con, XtIMTimer);
/*
* If there's no XEvents, don't wait around...
*/
if ((input_mask & XtIMXEvent) != XtIMXEvent)
return;
do {
if (waitingForTrackInfo)
return;
XtAppNextEvent (app_con, &event);
/*
* Hack to get around problems with the toolkit throwing away
* eventing during the exclusive grab of the menu popup. By
* looking at the event ourselves we make sure that we can
* do the right thing.
*/
if(OUR_EVENT(event, EnterNotify))
DoSpecialEnterNotify (&event.xcrossing);
else
if(OUR_EVENT(event, LeaveNotify))
DoSpecialLeaveNotify (&event.xcrossing);
else if ((screen->send_mouse_pos == ANY_EVENT_MOUSE
#if OPT_DEC_LOCATOR
|| screen->send_mouse_pos == DEC_LOCATOR
#endif /* OPT_DEC_LOCATOR */
)
&& event.xany.type == MotionNotify
&& event.xcrossing.window == XtWindow(term)) {
SendMousePosition((Widget)term, &event);
continue;
}
if (!event.xany.send_event ||
screen->allowSendEvents ||
((event.xany.type != KeyPress) &&
(event.xany.type != KeyRelease) &&
(event.xany.type != ButtonPress) &&
(event.xany.type != ButtonRelease)))
XtDispatchEvent(&event);
} while ((input_mask = XtAppPending(app_con)) & XtIMXEvent);
}
Cursor make_colored_cursor (
unsigned cursorindex, /* index into font */
unsigned long fg, /* pixel value */
unsigned long bg) /* pixel value */
{
register TScreen *screen = &term->screen;
Cursor c;
register Display *dpy = screen->display;
c = XCreateFontCursor (dpy, cursorindex);
if (c == (Cursor) 0) return (c);
recolor_cursor (c, fg, bg);
return (c);
}
/* ARGSUSED */
void HandleKeyPressed(
Widget w GCC_UNUSED,
XEvent *event,
String *params GCC_UNUSED,
Cardinal *nparams GCC_UNUSED)
{
register TScreen *screen = &term->screen;
#ifdef ACTIVEWINDOWINPUTONLY
if (w == CURRENT_EMU(screen))
#endif
Input (&term->keyboard, screen, &event->xkey, False);
}
/* ARGSUSED */
void HandleEightBitKeyPressed(
Widget w GCC_UNUSED,
XEvent *event,
String *params GCC_UNUSED,
Cardinal *nparams GCC_UNUSED)
{
register TScreen *screen = &term->screen;
#ifdef ACTIVEWINDOWINPUTONLY
if (w == CURRENT_EMU(screen))
#endif
Input (&term->keyboard, screen, &event->xkey, True);
}
/* ARGSUSED */
void HandleStringEvent(
Widget w GCC_UNUSED,
XEvent *event GCC_UNUSED,
String *params,
Cardinal *nparams)
{
register TScreen *screen = &term->screen;
#ifdef ACTIVEWINDOWINPUTONLY
if (w != CURRENT_EMU(screen))
return;
#endif
if (*nparams != 1) return;
if ((*params)[0] == '0' && (*params)[1] == 'x' && (*params)[2] != '\0') {
char c, *p, hexval[2];
hexval[0] = hexval[1] = 0;
for (p = *params+2; (c = *p); p++) {
hexval[0] *= 16;
if (isupper(c)) c = tolower(c);
if (c >= '0' && c <= '9')
hexval[0] += c - '0';
else if (c >= 'a' && c <= 'f')
hexval[0] += c - 'a' + 10;
else break;
}
if (c == '\0')
StringInput (screen, hexval, 1);
}
else {
StringInput (screen, *params, strlen(*params));
}
}
/*
* Rather than sending characters to the host, put them directly into our
* input queue. That lets a user have access to any of the control sequences
* for a key binding. This is the equivalent of local function key support.
*
* NOTE: This code does not support the hexadecimal kludge used in
* HandleStringEvent because it prevents us from sending an arbitrary string
* (but it appears in a lot of examples - so we are stuck with it). The
* standard string converter does recognize "\" for newline ("\n") and for
* octal constants (e.g., "\007" for BEL). So we assume the user can make do
* without a specialized converter. (Don't try to use \000, though).
*/
/* ARGSUSED */
void HandleInterpret(
Widget w GCC_UNUSED,
XEvent *event GCC_UNUSED,
String *params,
Cardinal *param_count)
{
if (*param_count == 1) {
char *value = params[0];
int need = strlen(value);
int used = usedPtyData(&VTbuffer);
int have = (VTbuffer.cnt >= 0) ? VTbuffer.cnt : 0;
int n;
if (have - used + need < BUF_SIZE) {
FlushLog(&term->screen);
if (have != 0
&& used < have) {
memmove(VTbuffer.ptr + (need - used),
VTbuffer.ptr,
VTbuffer.cnt * sizeof(*VTbuffer.ptr));
} else {
initPtyData(&VTbuffer);
used = 0;
}
VTbuffer.cnt += (need - used);
VTbuffer.ptr -= used;
for (n = 0; n < need; n++)
VTbuffer.ptr[n] = CharOf(value[n]);
}
}
}
static void DoSpecialEnterNotify (register XEnterWindowEvent *ev)
{
register TScreen *screen = &term->screen;
#ifdef ACTIVEWINDOWINPUTONLY
if (ev->window == XtWindow(XtParent(CURRENT_EMU(screen))))
#endif
if (((ev->detail) != NotifyInferior) &&
ev->focus &&
!(screen->select & FOCUS))
selectwindow(screen, INWINDOW);
}
/*ARGSUSED*/
void HandleEnterWindow(
Widget w GCC_UNUSED,
XtPointer eventdata GCC_UNUSED,
XEvent *event GCC_UNUSED,
Boolean *cont GCC_UNUSED)
{
/* NOP since we handled it above */
}
static void DoSpecialLeaveNotify (register XEnterWindowEvent *ev)
{
register TScreen *screen = &term->screen;
#ifdef ACTIVEWINDOWINPUTONLY
if (ev->window == XtWindow(XtParent(CURRENT_EMU(screen))))
#endif
if (((ev->detail) != NotifyInferior) &&
ev->focus &&
!(screen->select & FOCUS))
unselectwindow(screen, INWINDOW);
}
/*ARGSUSED*/
void HandleLeaveWindow(
Widget w GCC_UNUSED,
XtPointer eventdata GCC_UNUSED,
XEvent *event GCC_UNUSED,
Boolean *cont GCC_UNUSED)
{
/* NOP since we handled it above */
}
/*ARGSUSED*/
void HandleFocusChange(
Widget w GCC_UNUSED,
XtPointer eventdata GCC_UNUSED,
XEvent *ev,
Boolean *cont GCC_UNUSED)
{
register XFocusChangeEvent *event = (XFocusChangeEvent *)ev;
register TScreen *screen = &term->screen;
if(event->type == FocusIn)
selectwindow(screen,
(event->detail == NotifyPointer) ? INWINDOW :
FOCUS);
else {
unselectwindow(screen,
(event->detail == NotifyPointer) ? INWINDOW :
FOCUS);
if (screen->grabbedKbd && (event->mode == NotifyUngrab)) {
Bell(XkbBI_Info, 100);
ReverseVideo(term);
screen->grabbedKbd = FALSE;
update_securekbd();
}
}
}
static void
selectwindow(register TScreen *screen, register int flag)
{
#if OPT_TEK4014
if(screen->TekEmu) {
if(!Ttoggled)
TCursorToggle(TOGGLE);
screen->select |= flag;
if(!Ttoggled)
TCursorToggle(TOGGLE);
return;
} else
#endif
{
if (screen->xic)
XSetICFocus(screen->xic);
if(screen->cursor_state &&
(screen->cursor_col != screen->cur_col ||
screen->cursor_row != screen->cur_row))
HideCursor();
screen->select |= flag;
if(screen->cursor_state)
ShowCursor();
return;
}
}
static void
unselectwindow(register TScreen *screen, register int flag)
{
if (screen->always_highlight) return;
#if OPT_TEK4014
if(screen->TekEmu) {
if(!Ttoggled) TCursorToggle(TOGGLE);
screen->select &= ~flag;
if(!Ttoggled) TCursorToggle(TOGGLE);
} else
#endif
{
if (screen->xic)
XUnsetICFocus(screen->xic);
screen->select &= ~flag;
if(screen->cursor_state &&
(screen->cursor_col != screen->cur_col ||
screen->cursor_row != screen->cur_row))
HideCursor();
if(screen->cursor_state)
ShowCursor();
}
}
static long lastBellTime; /* in milliseconds */
void
Bell(int which GCC_UNUSED, int percent)
{
register TScreen *screen = &term->screen;
struct timeval curtime;
long now_msecs;
TRACE(("BELL %d\n", percent));
/* has enough time gone by that we are allowed to ring
the bell again? */
if(screen->bellSuppressTime) {
if(screen->bellInProgress) {
do_xevents();
if(screen->bellInProgress) { /* even after new events? */
return;
}
}
X_GETTIMEOFDAY(&curtime);
now_msecs = 1000*curtime.tv_sec + curtime.tv_usec/1000;
if(lastBellTime != 0 && now_msecs - lastBellTime >= 0 &&
now_msecs - lastBellTime < screen->bellSuppressTime) {
return;
}
lastBellTime = now_msecs;
}
if (screen->visualbell)
VisualBell();
else
#ifdef XKB
XkbStdBell(screen->display,TWindow(screen),percent,which);
#else
XBell(screen->display, percent);
#endif
if(screen->bellSuppressTime) {
/* now we change a property and wait for the notify event to come
back. If the server is suspending operations while the bell
is being emitted (problematic for audio bell), this lets us
know when the previous bell has finished */
Widget w = CURRENT_EMU(screen);
XChangeProperty(XtDisplay(w), XtWindow(w),
XA_NOTICE, XA_NOTICE, 8, PropModeAppend, NULL, 0);
screen->bellInProgress = TRUE;
}
}
void
VisualBell(void)
{
register TScreen *screen = &term->screen;
register Pixel xorPixel = screen->foreground ^ term->core.background_pixel;
XGCValues gcval;
GC visualGC;
gcval.function = GXxor;
gcval.foreground = xorPixel;
visualGC = XtGetGC((Widget)term, GCFunction+GCForeground, &gcval);
#if OPT_TEK4014
if(screen->TekEmu) {
XFillRectangle(
screen->display,
TWindow(screen),
visualGC,
0, 0,
(unsigned) TFullWidth(screen),
(unsigned) TFullHeight(screen));
XFlush(screen->display);
XFillRectangle(
screen->display,
TWindow(screen),
visualGC,
0, 0,
(unsigned) TFullWidth(screen),
(unsigned) TFullHeight(screen));
} else
#endif
{
XFillRectangle(
screen->display,
VWindow(screen),
visualGC,
0, 0,
(unsigned) FullWidth(screen),
(unsigned) FullHeight(screen));
XFlush(screen->display);
XFillRectangle(
screen->display,
VWindow(screen),
visualGC,
0, 0,
(unsigned) FullWidth(screen),
(unsigned) FullHeight(screen));
}
}
/* ARGSUSED */
void HandleBellPropertyChange(
Widget w GCC_UNUSED,
XtPointer data GCC_UNUSED,
XEvent *ev,
Boolean *more GCC_UNUSED)
{
register TScreen *screen = &term->screen;
if (ev->xproperty.atom == XA_NOTICE) {
screen->bellInProgress = FALSE;
}
}
#if OPT_MAXIMIZE
/*ARGSUSED*/
void HandleDeIconify (
Widget gw,
XEvent *event GCC_UNUSED,
String *params GCC_UNUSED,
Cardinal *nparams GCC_UNUSED)
{
if (IsXtermWidget(gw)) {
register TScreen *screen = &((XtermWidget)gw)->screen;
XMapWindow(screen->display, VShellWindow);
}
}
/*ARGSUSED*/
void HandleIconify (
Widget gw,
XEvent *event GCC_UNUSED,
String *params GCC_UNUSED,
Cardinal *nparams GCC_UNUSED)
{
if (IsXtermWidget(gw)) {
register TScreen *screen = &((XtermWidget)gw)->screen;
XIconifyWindow(screen->display,
VShellWindow,
DefaultScreen(screen->display));
}
}
int QueryMaximize(TScreen *screen, unsigned *width, unsigned *height)
{
XSizeHints hints;
long supp = 0;
Window root_win;
int root_x = -1; /* saved co-ordinates */
int root_y = -1;
unsigned root_border;
unsigned root_depth;
if (XGetGeometry(screen->display,
XDefaultRootWindow(screen->display),
&root_win,
&root_x,
&root_y,
width,
height,
&root_border,
&root_depth)) {
TRACE(("QueryMaximize: XGetGeometry position %d,%d size %d,%d border %d\n",
root_x,
root_y,
*width,
*height,
root_border));
*width -= (screen->border * 2),
*height -= (screen->border * 2);
hints.flags = PMaxSize;
if (XGetWMNormalHints(screen->display,
VShellWindow,
&hints,
&supp)
&& (hints.flags & PMaxSize) != 0) {
TRACE(("QueryMaximize: WM hints max_w %#x max_h %#x\n",
hints.max_width,
hints.max_height));
if ((unsigned) hints.max_width < *width)
*width = hints.max_width;
if ((unsigned) hints.max_height < *height)
*height = hints.max_height;
}
return 1;
}
return 0;
}
void RequestMaximize (XtermWidget termw, int maximize)
{
register TScreen *screen = &termw->screen;
XWindowAttributes win_attrs;
Position root_x, root_y;
unsigned root_width, root_height;
if (maximize) {
if (QueryMaximize(screen, &root_width, &root_height)) {
if (XGetWindowAttributes(screen->display,
VShellWindow,
&win_attrs)) {
XtTranslateCoords(toplevel, 0, 0, &root_x, &root_y);
if (screen->restore_data != True
|| screen->restore_width != root_width
|| screen->restore_height != root_height) {
screen->restore_data = True;
screen->restore_x = root_x - win_attrs.x;
screen->restore_y = root_y - win_attrs.y;
screen->restore_width = win_attrs.width;
screen->restore_height = win_attrs.height;
TRACE(("HandleMaximize: save window position %d,%d size %d,%d\n",
screen->restore_x,
screen->restore_y,
screen->restore_width,
screen->restore_height));
}
XMoveResizeWindow(screen->display,
VShellWindow,
0, /* x */
0, /* y */
root_width,
root_height);
}
}
} else {
if (screen->restore_data) {
TRACE(("HandleRestoreSize: position %d,%d size %d,%d\n",
screen->restore_x,
screen->restore_y,
screen->restore_width,
screen->restore_height));
screen->restore_data = False;
XMoveResizeWindow(screen->display,
VShellWindow,
screen->restore_x,
screen->restore_y,
screen->restore_width,
screen->restore_height);
}
}
}
/*ARGSUSED*/
void HandleMaximize (
Widget gw,
XEvent *event GCC_UNUSED,
String *params GCC_UNUSED,
Cardinal *nparams GCC_UNUSED)
{
if (IsXtermWidget(gw)) {
RequestMaximize((XtermWidget)gw, 1);
}
}
/*ARGSUSED*/
void HandleRestoreSize (
Widget gw,
XEvent *event GCC_UNUSED,
String *params GCC_UNUSED,
Cardinal *nparams GCC_UNUSED)
{
if (IsXtermWidget(gw)) {
RequestMaximize((XtermWidget)gw, 0);
}
}
#endif /* OPT_MAXIMIZE */
void
Redraw(void)
{
register TScreen *screen = &term->screen;
XExposeEvent event;
event.type = Expose;
event.display = screen->display;
event.x = 0;
event.y = 0;
event.count = 0;
if(VWindow(screen)) {
event.window = VWindow(screen);
event.width = term->core.width;
event.height = term->core.height;
(*term->core.widget_class->core_class.expose)((Widget)term, (XEvent *)&event, NULL);
if(Scrollbar(screen))
(*screen->scrollWidget->core.widget_class->core_class.expose)(screen->scrollWidget, (XEvent *)&event, NULL);
}
#if OPT_TEK4014
if(TWindow(screen) && screen->Tshow) {
event.window = TWindow(screen);
event.width = tekWidget->core.width;
event.height = tekWidget->core.height;
TekExpose ((Widget)tekWidget, (XEvent *)&event, NULL);
}
#endif
}
#if (defined(ALLOWLOGGING) || defined(DEBUG)) && !defined(VMS)
/*
* create a file only if we could with the permissions of the real user id.
* We could emulate this with careful use of access() and following
* symbolic links, but that is messy and has race conditions.
* Forking is messy, too, but we can't count on setreuid() or saved set-uids
* being available.
*
* Note: when called for user logging, we have ensured that the real and
* effective user ids are the same, so this remains as a convenience function
* for the debug logs.
*/
void
creat_as(int uid, int gid, char *pathname, int mode)
{
int fd;
int pid;
#ifndef HAVE_WAITPID
int waited;
SIGNAL_T (*chldfunc) (int);
chldfunc = signal(SIGCHLD, SIG_DFL);
#endif /* HAVE_WAITPID */
pid = fork();
switch (pid)
{
case 0: /* child */
setgid(gid);
setuid(uid);
fd = open(pathname, O_WRONLY|O_CREAT|O_APPEND, mode);
if (fd >= 0) {
close(fd);
_exit(0);
} else
_exit(1);
/* NOTREACHED */
case -1: /* error */
return;
default: /* parent */
#ifdef HAVE_WAITPID
waitpid(pid, NULL, 0);
#else /* HAVE_WAITPID */
waited = wait(NULL);
signal(SIGCHLD, chldfunc);
/*
Since we had the signal handler uninstalled for a while,
we might have missed the termination of our screen child.
If we can check for this possibility without hanging, do so.
*/
do
if (waited == term->screen.pid)
Cleanup(0);
while ( (waited=nonblocking_wait()) > 0);
#endif /* HAVE_WAITPID */
}
}
#endif /* defined(ALLOWLOGGING) || defined(DEBUG) */
#ifdef ALLOWLOGGING
/*
* Logging is a security hole, since it allows a setuid program to write
* arbitrary data to an arbitrary file. So it is disabled by default.
*/
#ifdef ALLOWLOGFILEEXEC
static SIGNAL_T logpipe (int sig GCC_UNUSED)
{
register TScreen *screen = &term->screen;
#ifdef SYSV
(void) signal(SIGPIPE, SIG_IGN);
#endif /* SYSV */
if(screen->logging)
CloseLog(screen);
}
#endif /* ALLOWLOGFILEEXEC */
void
StartLog(register TScreen *screen)
{
static char *log_default;
#ifdef ALLOWLOGFILEEXEC
register char *cp;
register int i = 0;
#ifdef SYSV
/* SYSV has another pointer which should be part of the
** FILE structure but is actually a separate array.
*/
unsigned char *old_bufend;
#endif /* SYSV */
#endif /* ALLOWLOGFILEEXEC */
if(screen->logging || (screen->inhibit & I_LOG))
return;
#ifdef VMS /* file name is fixed in VMS variant */
screen->logfd = open(XTERM_VMS_LOGFILE, O_CREAT|O_TRUNC|O_APPEND|O_RDWR, 0640);
if(screen->logfd < 0)return; /* open failed */
#else /*VMS*/
if(screen->logfile == NULL || *screen->logfile == 0) {
if(screen->logfile)
free(screen->logfile);
if(log_default == NULL) {
log_default = (char *)malloc(strlen(log_def_name) + 1);
if (log_default == 0)
return;
strcpy(log_default, log_def_name);
mktemp(log_default);
}
if((screen->logfile = (char *)malloc(strlen(log_default) + 1)) == 0)
return;
strcpy(screen->logfile, log_default);
}
if(*screen->logfile == '|') { /* exec command */
#ifdef ALLOWLOGFILEEXEC
/*
* Warning, enabling this "feature" allows arbitrary programs
* to be run. If ALLOWLOGFILECHANGES is enabled, this can be
* done through escape sequences.... You have been warned.
*/
int p[2];
static char *shell;
register struct passwd *pw;
if(pipe(p) < 0 || (i = fork()) < 0)
return;
if(i == 0) { /* child */
/*
* Close our output (we won't be talking back to the
* parent), and redirect our child's output to the
* original stderr.
*/
close(p[1]);
dup2(p[0], 0);
close(p[0]);
dup2(fileno(stderr), 1);
dup2(fileno(stderr), 2);
close(fileno(stderr));
close(ConnectionNumber(screen->display));
close(screen->respond);
if ((((cp = getenv("SHELL")) == NULL || *cp == 0)
&& ((pw = getpwuid(screen->uid)) == NULL
|| *(cp = pw->pw_shell) == 0))
|| (shell = (char *)malloc(strlen(cp) + 1)) == 0)
shell = "/bin/sh";
else
strcpy(shell, cp);
signal(SIGHUP, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
/* (this is redundant) */
setgid(screen->gid);
setuid(screen->uid);
execl(shell, shell, "-c", &screen->logfile[1], 0);
fprintf(stderr, "%s: Can't exec `%s'\n", xterm_name,
&screen->logfile[1]);
exit(ERROR_LOGEXEC);
}
close(p[0]);
screen->logfd = p[1];
signal(SIGPIPE, logpipe);
#else
Bell(XkbBI_Info,0);
Bell(XkbBI_Info,0);
return;
#endif
} else {
if(access(screen->logfile, F_OK) != 0) {
if (errno == ENOENT)
creat_as(screen->uid, screen->gid,
screen->logfile, 0644);
else
return;
}
if(access(screen->logfile, F_OK) != 0
|| access(screen->logfile, W_OK) != 0)
return;
if((screen->logfd = open(screen->logfile, O_WRONLY | O_APPEND,
0644)) < 0)
return;
}
#endif /*VMS*/
screen->logstart = CURRENT_EMU_VAL(screen, Tbuffer->ptr, VTbuffer.ptr);
screen->logging = TRUE;
update_logging();
}
void
CloseLog(register TScreen *screen)
{
if(!screen->logging || (screen->inhibit & I_LOG))
return;
FlushLog(screen);
close(screen->logfd);
screen->logging = FALSE;
update_logging();
}
void
FlushLog(register TScreen *screen)
{
register IChar *cp;
register int i;
#ifdef VMS /* avoid logging output loops which otherwise occur sometimes
when there is no output and cp/screen->logstart are 1 apart */
if(!tt_new_output)return;
tt_new_output = FALSE;
#endif /* VMS */
cp = CURRENT_EMU_VAL(screen, Tbuffer->ptr, VTbuffer.ptr);
if (screen->logstart != 0
&& (i = cp - screen->logstart) > 0) {
#if OPT_WIDE_CHARS
Char temp[80];
IChar code;
unsigned n;
while (i-- > 0) {
code = *(screen->logstart)++;
if (screen->utf8_mode) {
n = convertFromUTF8(code & 0xffff, temp);
} else {
temp[0] = code;
n = 1;
while (i > 0 && n < sizeof(temp)) {
i--;
temp[n++] = *(screen->logstart)++;
}
}
write(screen->logfd, temp, n);
}