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eterm/src/command.c

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/*--------------------------------*-C-*---------------------------------*
* File: command.c
*/
/* notes: */
/*----------------------------------------------------------------------*
* Copyright 1992 John Bovey, University of Kent at Canterbury.
*
* You can do what you like with this source code as long as
* you don't try to make money out of it and you include an
* unaltered copy of this message (including the copyright).
*
* This module has been very heavily modified by R. Nation
* <nation@rocket.sanders.lockheed.com>
* No additional restrictions are applied
*
* Additional modification by Garrett D'Amore <garrett@netcom.com> to
* allow vt100 printing. No additional restrictions are applied.
*
* Integrated modifications by Steven Hirsch <hirsch@emba.uvm.edu> to
* properly support X11 mouse report mode and support for DEC
* "private mode" save/restore functions.
*
* Integrated key-related changes by Jakub Jelinek <jj@gnu.ai.mit.edu>
* to handle Shift+function keys properly.
* Should be used with enclosed termcap / terminfo database.
*
* Extensive modifications by mj olesen <olesen@me.QueensU.CA>
* No additional restrictions.
*
* Further modification and cleanups for Solaris 2.x and Linux 1.2.x
* by Raul Garcia Garcia <rgg@tid.es>. No additional restrictions.
*
* As usual, the author accepts no responsibility for anything, nor does
* he guarantee anything whatsoever.
*----------------------------------------------------------------------*/
static const char cvs_ident[] = "$Id$";
/* includes: */
#include "config.h"
#include "feature.h"
/* System Headers */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <sys/types.h>
#include <limits.h>
/* X11 Headers */
#include <X11/cursorfont.h>
#include <X11/keysym.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/Xos.h>
#include <X11/Xproto.h>
#include <X11/IntrinsicP.h>
#ifdef PTY_GRP_NAME
# include <grp.h>
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#if defined (__svr4__)
# include <sys/resource.h> /* for struct rlimit */
# include <sys/stropts.h> /* for I_PUSH */
# ifdef HAVE_SYS_STRTIO_H
# include <sys/strtio.h>
# endif
# ifdef HAVE_BSDTTY_H
# include <bsdtty.h>
# endif
# define _NEW_TTY_CTRL /* to get proper defines in <termios.h> */
#endif
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#ifdef HAVE_TERMIOS_H
# include <termios.h>
#else
# include <sgtty.h>
#endif
#if defined(__sun) && defined(__SVR4)
# include <sys/strredir.h>
#endif
#include <sys/wait.h>
#include <sys/stat.h>
#if defined(linux)
# include <linux/tty.h> /* For N_TTY_BUF_SIZE. */
#endif
/* Eterm-specific Headers */
#include "command.h"
#include "startup.h"
#include "events.h"
#include "font.h"
#include "grkelot.h"
#include "options.h"
#include "pixmap.h"
#ifdef PROFILE
# include "profile.h"
#endif
#include "screen.h"
#include "scrollbar.h"
#include "string.h"
#include "term.h"
#ifdef UTMP_SUPPORT
# include "eterm_utmp.h"
#endif
#include "windows.h"
#include "buttons.h"
#include "menus.h"
#ifdef ESCREEN
# include "screamcfg.h"
#endif
static RETSIGTYPE handle_child_signal(int);
static RETSIGTYPE handle_exit_signal(int);
static RETSIGTYPE handle_crash(int);
/* local variables */
int my_ruid, my_euid, my_rgid, my_egid;
char initial_dir[PATH_MAX + 1];
static char *ptydev = NULL, *ttydev = NULL; /* pty/tty name */
int cmd_fd = -1; /* file descriptor connected to the command */
int pipe_fd = -1;
pid_t cmd_pid = -1; /* process id if child */
int Xfd = -1; /* file descriptor of X server connection */
unsigned int num_fds = 0; /* number of file descriptors being used */
struct stat ttyfd_stat; /* original status of the tty we will use */
int refresh_count = 0, refresh_limit = 1, refresh_type = FAST_REFRESH;
unsigned char cmdbuf_base[CMD_BUF_SIZE], *cmdbuf_ptr, *cmdbuf_endp;
/* Addresses pasting large amounts of data
* code pinched from xterm
*/
static char *v_buffer; /* pointer to physical buffer */
static char *v_bufstr = NULL; /* beginning of area to write */
static char *v_bufptr; /* end of area to write */
static char *v_bufend; /* end of physical buffer */
#ifdef USE_XIM
XIM xim_input_method = NULL;
XIC xim_input_context = NULL; /* input context */
static XIMStyle xim_input_style = 0;
# ifndef XSetIMValues
extern char *XSetIMValues(XIM im, ...);
# endif
#endif
/* Substitutes for missing system functions */
#if !defined(_POSIX_VERSION) && defined(__svr4__)
int
getdtablesize(void)
{
struct rlimit rlim;
getrlimit(RLIMIT_NOFILE, &rlim);
return rlim.rlim_cur;
}
# endif
/* Take care of suid/sgid super-user (root) privileges */
void
privileges(int mode)
{
#ifdef __CYGWIN32__
return;
#endif
switch (mode) {
case IGNORE:
/* Revoke suid/sgid privs and return to normal uid/gid -- mej */
D_UTMP(("[%ld]: Before privileges(REVERT): [ %ld, %ld ] [ %ld, %ld ]\n", getpid(), getuid(), getgid(), geteuid(), getegid()));
#ifdef HAVE_SETRESGID
setresgid(my_rgid, my_rgid, my_egid);
#elif defined(HAVE_SAVED_UIDS)
setregid(my_rgid, my_rgid);
#else
setregid(my_egid, -1);
setregid(-1, my_rgid);
#endif
#ifdef HAVE_SETRESUID
setresuid(my_ruid, my_ruid, my_euid);
#elif defined(HAVE_SAVED_UIDS)
setreuid(my_ruid, my_ruid);
#else
setreuid(my_euid, -1);
setreuid(-1, my_ruid);
#endif
D_UTMP(("[%ld]: After privileges(REVERT): [ %ld, %ld ] [ %ld, %ld ]\n", getpid(), getuid(), getgid(), geteuid(), getegid()));
break;
case SAVE:
break;
case RESTORE:
D_UTMP(("[%ld]: Before privileges(INVOKE): [ %ld, %ld ] [ %ld, %ld ]\n", getpid(), getuid(), getgid(), geteuid(), getegid()));
#ifdef HAVE_SETRESUID
setresuid(my_ruid, my_euid, my_euid);
#elif defined(HAVE_SAVED_UIDS)
setreuid(my_ruid, my_euid);
#else
setreuid(-1, my_euid);
setreuid(my_ruid, -1);
#endif
#ifdef HAVE_SETRESGID
setresgid(my_rgid, my_egid, my_egid);
#elif defined(HAVE_SAVED_UIDS)
setregid(my_rgid, my_egid);
#else
setregid(-1, my_egid);
setregid(my_rgid, -1);
#endif
D_UTMP(("[%ld]: After privileges(INVOKE): [ %ld, %ld ] [ %ld, %ld ]\n", getpid(), getuid(), getgid(), geteuid(), getegid()));
break;
}
}
char *
sig_to_str(int sig)
{
#ifdef SIGHUP
if (sig == SIGHUP) {
return ("SIGHUP");
}
#endif
#ifdef SIGINT
if (sig == SIGINT) {
return ("SIGINT");
}
#endif
#ifdef SIGQUIT
if (sig == SIGQUIT) {
return ("SIGQUIT");
}
#endif
#ifdef SIGILL
if (sig == SIGILL) {
return ("SIGILL");
}
#endif
#ifdef SIGTRAP
if (sig == SIGTRAP) {
return ("SIGTRAP");
}
#endif
#ifdef SIGABRT
if (sig == SIGABRT) {
return ("SIGABRT");
}
#endif
#ifdef SIGIOT
if (sig == SIGIOT) {
return ("SIGIOT");
}
#endif
#ifdef SIGEMT
if (sig == SIGEMT) {
return ("SIGEMT");
}
#endif
#ifdef SIGFPE
if (sig == SIGFPE) {
return ("SIGFPE");
}
#endif
#ifdef SIGKILL
if (sig == SIGKILL) {
return ("SIGKILL");
}
#endif
#ifdef SIGBUS
if (sig == SIGBUS) {
return ("SIGBUS");
}
#endif
#ifdef SIGSEGV
if (sig == SIGSEGV) {
return ("SIGSEGV");
}
#endif
#ifdef SIGSYS
if (sig == SIGSYS) {
return ("SIGSYS");
}
#endif
#ifdef SIGPIPE
if (sig == SIGPIPE) {
return ("SIGPIPE");
}
#endif
#ifdef SIGALRM
if (sig == SIGALRM) {
return ("SIGALRM");
}
#endif
#ifdef SIGTERM
if (sig == SIGTERM) {
return ("SIGTERM");
}
#endif
#ifdef SIGUSR1
if (sig == SIGUSR1) {
return ("SIGUSR1");
}
#endif
#ifdef SIGUSR2
if (sig == SIGUSR2) {
return ("SIGUSR2");
}
#endif
#ifdef SIGCHLD
if (sig == SIGCHLD) {
return ("SIGCHLD");
}
#endif
#ifdef SIGCLD
if (sig == SIGCLD) {
return ("SIGCLD");
}
#endif
#ifdef SIGPWR
if (sig == SIGPWR) {
return ("SIGPWR");
}
#endif
#ifdef SIGVTALRM
if (sig == SIGVTALRM) {
return ("SIGVTALRM");
}
#endif
#ifdef SIGPROF
if (sig == SIGPROF) {
return ("SIGPROF");
}
#endif
#ifdef SIGIO
if (sig == SIGIO) {
return ("SIGIO");
}
#endif
#ifdef SIGPOLL
if (sig == SIGPOLL) {
return ("SIGPOLL");
}
#endif
#ifdef SIGWINCH
if (sig == SIGWINCH) {
return ("SIGWINCH");
}
#endif
#ifdef SIGWINDOW
if (sig == SIGWINDOW) {
return ("SIGWINDOW");
}
#endif
#ifdef SIGSTOP
if (sig == SIGSTOP) {
return ("SIGSTOP");
}
#endif
#ifdef SIGTSTP
if (sig == SIGTSTP) {
return ("SIGTSTP");
}
#endif
#ifdef SIGCONT
if (sig == SIGCONT) {
return ("SIGCONT");
}
#endif
#ifdef SIGTTIN
if (sig == SIGTTIN) {
return ("SIGTTIN");
}
#endif
#ifdef SIGTTOU
if (sig == SIGTTOU) {
return ("SIGTTOU");
}
#endif
#ifdef SIGURG
if (sig == SIGURG) {
return ("SIGURG");
}
#endif
#ifdef SIGLOST
if (sig == SIGLOST) {
return ("SIGLOST");
}
#endif
#ifdef SIGRESERVE
if (sig == SIGRESERVE) {
return ("SIGRESERVE");
}
#endif
#ifdef SIGDIL
if (sig == SIGDIL) {
return ("SIGDIL");
}
#endif
#ifdef SIGXCPU
if (sig == SIGXCPU) {
return ("SIGXCPU");
}
#endif
#ifdef SIGXFSZ
if (sig == SIGXFSZ) {
return ("SIGXFSZ");
}
#endif
return ("Unknown signal");
}
const char *
event_type_to_name(int type)
{
if (type == KeyPress) {
return "KeyPress";
}
if (type == KeyRelease) {
return "KeyRelease";
}
if (type == ButtonPress) {
return "ButtonPress";
}
if (type == ButtonRelease) {
return "ButtonRelease";
}
if (type == MotionNotify) {
return "MotionNotify";
}
if (type == EnterNotify) {
return "EnterNotify";
}
if (type == LeaveNotify) {
return "LeaveNotify";
}
if (type == FocusIn) {
return "FocusIn";
}
if (type == FocusOut) {
return "FocusOut";
}
if (type == KeymapNotify) {
return "KeymapNotify";
}
if (type == Expose) {
return "Expose";
}
if (type == GraphicsExpose) {
return "GraphicsExpose";
}
if (type == NoExpose) {
return "NoExpose";
}
if (type == VisibilityNotify) {
return "VisibilityNotify";
}
if (type == CreateNotify) {
return "CreateNotify";
}
if (type == DestroyNotify) {
return "DestroyNotify";
}
if (type == UnmapNotify) {
return "UnmapNotify";
}
if (type == MapNotify) {
return "MapNotify";
}
if (type == MapRequest) {
return "MapRequest";
}
if (type == ReparentNotify) {
return "ReparentNotify";
}
if (type == ConfigureNotify) {
return "ConfigureNotify";
}
if (type == ConfigureRequest) {
return "ConfigureRequest";
}
if (type == GravityNotify) {
return "GravityNotify";
}
if (type == ResizeRequest) {
return "ResizeRequest";
}
if (type == CirculateNotify) {
return "CirculateNotify";
}
if (type == CirculateRequest) {
return "CirculateRequest";
}
if (type == PropertyNotify) {
return "PropertyNotify";
}
if (type == SelectionClear) {
return "SelectionClear";
}
if (type == SelectionRequest) {
return "SelectionRequest";
}
if (type == SelectionNotify) {
return "SelectionNotify";
}
if (type == ColormapNotify) {
return "ColormapNotify";
}
if (type == ClientMessage) {
return "ClientMessage";
}
if (type == MappingNotify) {
return "MappingNotify";
}
return "Bad Event!";
}
const char *
request_code_to_name(int code)
{
if (code == X_CreateWindow) {
return "XCreateWindow";
}
if (code == X_ChangeWindowAttributes) {
return "XChangeWindowAttributes";
}
if (code == X_GetWindowAttributes) {
return "XGetWindowAttributes";
}
if (code == X_DestroyWindow) {
return "XDestroyWindow";
}
if (code == X_DestroySubwindows) {
return "XDestroySubwindows";
}
if (code == X_ChangeSaveSet) {
return "XChangeSaveSet";
}
if (code == X_ReparentWindow) {
return "XReparentWindow";
}
if (code == X_MapWindow) {
return "XMapWindow";
}
if (code == X_MapSubwindows) {
return "XMapSubwindows";
}
if (code == X_UnmapWindow) {
return "XUnmapWindow";
}
if (code == X_UnmapSubwindows) {
return "XUnmapSubwindows";
}
if (code == X_ConfigureWindow) {
return "XConfigureWindow";
}
if (code == X_CirculateWindow) {
return "XCirculateWindow";
}
if (code == X_GetGeometry) {
return "XGetGeometry";
}
if (code == X_QueryTree) {
return "XQueryTree";
}
if (code == X_InternAtom) {
return "XInternAtom";
}
if (code == X_GetAtomName) {
return "XGetAtomName";
}
if (code == X_ChangeProperty) {
return "XChangeProperty";
}
if (code == X_DeleteProperty) {
return "XDeleteProperty";
}
if (code == X_GetProperty) {
return "XGetProperty";
}
if (code == X_ListProperties) {
return "XListProperties";
}
if (code == X_SetSelectionOwner) {
return "XSetSelectionOwner";
}
if (code == X_GetSelectionOwner) {
return "XGetSelectionOwner";
}
if (code == X_ConvertSelection) {
return "XConvertSelection";
}
if (code == X_SendEvent) {
return "XSendEvent";
}
if (code == X_GrabPointer) {
return "XGrabPointer";
}
if (code == X_UngrabPointer) {
return "XUngrabPointer";
}
if (code == X_GrabButton) {
return "XGrabButton";
}
if (code == X_UngrabButton) {
return "XUngrabButton";
}
if (code == X_ChangeActivePointerGrab) {
return "XChangeActivePointerGrab";
}
if (code == X_GrabKeyboard) {
return "XGrabKeyboard";
}
if (code == X_UngrabKeyboard) {
return "XUngrabKeyboard";
}
if (code == X_GrabKey) {
return "XGrabKey";
}
if (code == X_UngrabKey) {
return "XUngrabKey";
}
if (code == X_AllowEvents) {
return "XAllowEvents";
}
if (code == X_GrabServer) {
return "XGrabServer";
}
if (code == X_UngrabServer) {
return "XUngrabServer";
}
if (code == X_QueryPointer) {
return "XQueryPointer";
}
if (code == X_GetMotionEvents) {
return "XGetMotionEvents";
}
if (code == X_TranslateCoords) {
return "XTranslateCoords";
}
if (code == X_WarpPointer) {
return "XWarpPointer";
}
if (code == X_SetInputFocus) {
return "XSetInputFocus";
}
if (code == X_GetInputFocus) {
return "XGetInputFocus";
}
if (code == X_QueryKeymap) {
return "XQueryKeymap";
}
if (code == X_OpenFont) {
return "XOpenFont";
}
if (code == X_CloseFont) {
return "XCloseFont";
}
if (code == X_QueryFont) {
return "XQueryFont";
}
if (code == X_QueryTextExtents) {
return "XQueryTextExtents";
}
if (code == X_ListFonts) {
return "XListFonts";
}
if (code == X_ListFontsWithInfo) {
return "XListFontsWithInfo";
}
if (code == X_SetFontPath) {
return "XSetFontPath";
}
if (code == X_GetFontPath) {
return "XGetFontPath";
}
if (code == X_CreatePixmap) {
return "XCreatePixmap";
}
if (code == X_FreePixmap) {
return "XFreePixmap";
}
if (code == X_CreateGC) {
return "XCreateGC";
}
if (code == X_ChangeGC) {
return "XChangeGC";
}
if (code == X_CopyGC) {
return "XCopyGC";
}
if (code == X_SetDashes) {
return "XSetDashes";
}
if (code == X_SetClipRectangles) {
return "XSetClipRectangles";
}
if (code == X_FreeGC) {
return "XFreeGC";
}
if (code == X_ClearArea) {
return "XClearArea";
}
if (code == X_CopyArea) {
return "XCopyArea";
}
if (code == X_CopyPlane) {
return "XCopyPlane";
}
if (code == X_PolyPoint) {
return "XPolyPoint";
}
if (code == X_PolyLine) {
return "XPolyLine";
}
if (code == X_PolySegment) {
return "XPolySegment";
}
if (code == X_PolyRectangle) {
return "XPolyRectangle";
}
if (code == X_PolyArc) {
return "XPolyArc";
}
if (code == X_FillPoly) {
return "XFillPoly";
}
if (code == X_PolyFillRectangle) {
return "XPolyFillRectangle";
}
if (code == X_PolyFillArc) {
return "XPolyFillArc";
}
if (code == X_PutImage) {
return "XPutImage";
}
if (code == X_GetImage) {
return "XGetImage";
}
if (code == X_PolyText8) {
return "XPolyText8";
}
if (code == X_PolyText16) {
return "XPolyText16";
}
if (code == X_ImageText8) {
return "XImageText8";
}
if (code == X_ImageText16) {
return "XImageText16";
}
if (code == X_CreateColormap) {
return "XCreateColormap";
}
if (code == X_FreeColormap) {
return "XFreeColormap";
}
if (code == X_CopyColormapAndFree) {
return "XCopyColormapAndFree";
}
if (code == X_InstallColormap) {
return "XInstallColormap";
}
if (code == X_UninstallColormap) {
return "XUninstallColormap";
}
if (code == X_ListInstalledColormaps) {
return "XListInstalledColormaps";
}
if (code == X_AllocColor) {
return "XAllocColor";
}
if (code == X_AllocNamedColor) {
return "XAllocNamedColor";
}
if (code == X_AllocColorCells) {
return "XAllocColorCells";
}
if (code == X_AllocColorPlanes) {
return "XAllocColorPlanes";
}
if (code == X_FreeColors) {
return "XFreeColors";
}
if (code == X_StoreColors) {
return "XStoreColors";
}
if (code == X_StoreNamedColor) {
return "XStoreNamedColor";
}
if (code == X_QueryColors) {
return "XQueryColors";
}
if (code == X_LookupColor) {
return "XLookupColor";
}
if (code == X_CreateCursor) {
return "XCreateCursor";
}
if (code == X_CreateGlyphCursor) {
return "XCreateGlyphCursor";
}
if (code == X_FreeCursor) {
return "XFreeCursor";
}
if (code == X_RecolorCursor) {
return "XRecolorCursor";
}
if (code == X_QueryBestSize) {
return "XQueryBestSize";
}
if (code == X_QueryExtension) {
return "XQueryExtension";
}
if (code == X_ListExtensions) {
return "XListExtensions";
}
if (code == X_ChangeKeyboardMapping) {
return "XChangeKeyboardMapping";
}
if (code == X_GetKeyboardMapping) {
return "XGetKeyboardMapping";
}
if (code == X_ChangeKeyboardControl) {
return "XChangeKeyboardControl";
}
if (code == X_GetKeyboardControl) {
return "XGetKeyboardControl";
}
if (code == X_Bell) {
return "XBell";
}
if (code == X_ChangePointerControl) {
return "XChangePointerControl";
}
if (code == X_GetPointerControl) {
return "XGetPointerControl";
}
if (code == X_SetScreenSaver) {
return "XSetScreenSaver";
}
if (code == X_GetScreenSaver) {
return "XGetScreenSaver";
}
if (code == X_ChangeHosts) {
return "XChangeHosts";
}
if (code == X_ListHosts) {
return "XListHosts";
}
if (code == X_SetAccessControl) {
return "XSetAccessControl";
}
if (code == X_SetCloseDownMode) {
return "XSetCloseDownMode";
}
if (code == X_KillClient) {
return "XKillClient";
}
if (code == X_RotateProperties) {
return "XRotateProperties";
}
if (code == X_ForceScreenSaver) {
return "XForceScreenSaver";
}
if (code == X_SetPointerMapping) {
return "XSetPointerMapping";
}
if (code == X_GetPointerMapping) {
return "XGetPointerMapping";
}
if (code == X_SetModifierMapping) {
return "XSetModifierMapping";
}
if (code == X_GetModifierMapping) {
return "XGetModifierMapping";
}
if (code == X_NoOperation) {
return "XNoOperation";
}
return "Unknown";
}
const char *
get_ctrl_char_name(char c)
{
const char *lookup[] = {
"NUL", "SOH", "STX", "ETX", "EOT", "ENQ", "ACK", "BEL", /* 0-7 */
"BS", "HT", "LF", "VT", "FF", "CR", "SO", "SI", /* 8-15 */
"DLE", "DC1", "DC2", "DC3", "DC4", "NAK", "SYN", "ETB", /* 16-23 */
"CAN", "EM", "SUB", "ESC", "FS", "GS", "RS", "US" /* 24-31 */
};
return ((c < ' ') ? (lookup[(int) c]) : (""));
}
static void
hard_exit(void)
{
#ifdef HAVE__EXIT
_exit(-1);
#elif defined(SIGKILL)
kill(cmd_pid, SIGKILL);
abort();
#else
kill(cmd_pid, 9);
abort();
#endif
}
/* Try to get a stack trace when we croak */
void
dump_stack_trace(void)
{
char cmd[256];
struct stat st;
#ifdef NO_STACK_TRACE
return;
#endif
print_error("Attempting to dump a stack trace....\n");
signal(SIGTSTP, exit); /* Don't block on tty output, just die */
#ifdef HAVE_U_STACK_TRACE
U_STACK_TRACE();
return;
#elif defined(GDB)
if (((stat(GDB_CMD_FILE, &st)) != 0) || (!S_ISREG(st.st_mode))) {
return;
}
snprintf(cmd, sizeof(cmd), GDB " -x " GDB_CMD_FILE " " APL_NAME " %d", getpid());
#elif defined(PSTACK)
snprintf(cmd, sizeof(cmd), PSTACK " %d", getpid());
#elif defined(DBX)
# ifdef _AIX
snprintf(cmd, sizeof(cmd), "/bin/echo 'where\ndetach' | " DBX " -a %d", getpid());
# elif defined(__sgi)
snprintf(cmd, sizeof(cmd), "/bin/echo 'where\ndetach' | " DBX " -p %d", getpid());
# else
snprintf(cmd, sizeof(cmd), "/bin/echo 'where\ndetach' | " DBX " %s %d", orig_argv0, getpid());
# endif
#else
print_error("Your system does not support any of the methods Eterm uses. Exiting.\n");
return;
#endif
signal(SIGALRM, (eterm_sighandler_t) hard_exit);
alarm(3);
system(cmd);
}
/* signal handling, exit handler */
/*
* Catch a SIGCHLD signal and exit if the direct child has died
*/
static RETSIGTYPE
handle_child_signal(int sig)
{
int pid, save_errno = errno;
D_CMD(("Received signal %s (%d)\n", sig_to_str(sig), sig));
do {
errno = 0;
} while ((-1 == (pid = waitpid(-1, NULL, WNOHANG))) && (errno == EINTR));
D_CMD(("pid == %d, cmd_pid == %d\n", pid, cmd_pid));
/* If the child that exited is the command we spawned, or if the
child exited before fork() returned in the parent, it must be
our immediate child that exited. We exit gracefully. */
if ((pid == cmd_pid && cmd_pid != -1)
|| (pid == -1 && errno == ECHILD && cmd_pid != -1)
|| (pid == 0)) {
if (Options & Opt_pause) {
paused = 1;
return;
}
exit(EXIT_SUCCESS);
}
errno = save_errno;
D_CMD(("handle_child_signal: installing signal handler\n"));
signal(SIGCHLD, handle_child_signal);
SIG_RETURN(0);
}
/* Handles signals usually sent by a user, like HUP, TERM, INT. */
static RETSIGTYPE
handle_exit_signal(int sig)
{
print_error("Received terminal signal %s (%d)\n", sig_to_str(sig), sig);
signal(sig, SIG_DFL);
#ifdef UTMP_SUPPORT
privileges(INVOKE);
remove_utmp_entry();
privileges(REVERT);
#endif
D_CMD(("exit(%s)\n", sig_to_str(sig)));
exit(sig);
SIG_RETURN(0);
}
/* Handles abnormal termination signals -- mej */
static RETSIGTYPE
handle_crash(int sig)
{
print_error("Received terminal signal %s (%d)\n", sig_to_str(sig), sig);
signal(sig, SIG_DFL); /* Let the OS handle recursive seg faults */
/* Lock down security so we don't write any core files as root. */
privileges(REVERT);
umask(077);
/* Make an attempt to dump a stack trace */
dump_stack_trace();
/* Exit */
exit(sig);
SIG_RETURN(0);
}
void
install_handlers(void)
{
/* Ignore SIGHUP */
/* signal(SIGHUP, handle_exit_signal); */
signal(SIGHUP, SIG_IGN);
#ifndef __svr4__
signal(SIGINT, handle_exit_signal);
#endif
signal(SIGTERM, handle_exit_signal);
signal(SIGCHLD, handle_child_signal);
signal(SIGQUIT, handle_crash);
signal(SIGSEGV, handle_crash);
signal(SIGBUS, handle_crash);
signal(SIGABRT, handle_crash);
signal(SIGFPE, handle_crash);
signal(SIGILL, handle_crash);
signal(SIGSYS, handle_crash);
signal(SIGPIPE, SIG_IGN);
}
/* Exit gracefully, clearing the utmp entry and restoring tty attributes */
void
clean_exit(void)
{
#if DEBUG >= DEBUG_MEM
if (DEBUG_LEVEL >= DEBUG_MEM) {
unsigned short i;
/* Deallocate all our crap to help find memory leaks */
selection_clear();
scr_release();
bbar_free(buttonbar);
menulist_clear(menu_list);
font_cache_clear();
eterm_font_list_clear();
# ifdef PIXMAP_SUPPORT
FOREACH_IMAGE(free_eterm_image(&(images[idx]));
);
# endif
for (i = 0; i < NRS_COLORS; i++) {
if (rs_color[i]) {
FREE(rs_color[i]);
}
}
conf_free_subsystem();
# ifdef USE_XIM
if (xim_input_context) {
XUnsetICFocus(xim_input_context);
XDestroyIC(xim_input_context);
}
if (xim_input_method) {
XCloseIM(xim_input_method);
}
# endif
XCloseDisplay(Xdisplay);
}
#endif
privileges(INVOKE);
#ifndef __CYGWIN32__
if (ttydev) {
D_CMD(("Restoring \"%s\" to mode %03o, uid %d, gid %d\n", ttydev, ttyfd_stat.st_mode, ttyfd_stat.st_uid, ttyfd_stat.st_gid));
if (chmod(ttydev, ttyfd_stat.st_mode) != 0) {
D_UTMP(("chmod(\"%s\", %03o) failed: %s\n", ttydev, ttyfd_stat.st_mode, strerror(errno)));
}
if (chown(ttydev, ttyfd_stat.st_uid, ttyfd_stat.st_gid) != 0) {
D_UTMP(("chown(\"%s\", %d, %d) failed: %s\n", ttydev, ttyfd_stat.st_uid, ttyfd_stat.st_gid, strerror(errno)));
}
}
#endif /* __CYGWIN32__ */
#ifdef UTMP_SUPPORT
remove_utmp_entry();
#endif
privileges(REVERT);
#if DEBUG >= DEBUG_MEM
if (DEBUG_LEVEL >= DEBUG_MEM) {
MALLOC_DUMP();
PIXMAP_DUMP();
GC_DUMP();
}
#endif
PABLO_STOP_TRACING();
DPRINTF1(("Cleanup done. I am outta here!\n"));
}
/* Acquire a pseudo-teletype from the system. */
/*
* On failure, returns -1.
* On success, returns the file descriptor.
*
* If successful, ttydev and ptydev point to the names of the
* master and slave parts
*/
#ifdef __sgi
inline int sgi_get_pty(void);
inline int
sgi_get_pty(void)
{
int fd = -1;
privileges(INVOKE);
ptydev = ttydev = _getpty(&fd, O_RDWR | O_NDELAY, 0620, 0);
privileges(REVERT);
return (ptydev == NULL ? -1 : fd);
}
#endif
#ifdef HAVE_DEV_PTC
inline int aix_get_pty(void);
inline int
aix_get_pty(void)
{
int fd = -1;
if ((fd = open("/dev/ptc", O_RDWR)) < 0)
return (-1);
else
ptydev = ttydev = ttyname(fd);
return (fd);
}
#endif
#ifdef HAVE_SCO_PTYS
inline int sco_get_pty(void);
inline int
sco_get_pty(void)
{
static char pty_name[] = "/dev/ptyp??\0\0\0";
static char tty_name[] = "/dev/ttyp??\0\0\0";
int idx;
int fd = -1;
ptydev = pty_name;
ttydev = tty_name;
for (idx = 0; idx < 256; idx++) {
sprintf(ptydev, "/dev/ptyp%d", idx);
sprintf(ttydev, "/dev/ttyp%d", idx);
if (access(ttydev, F_OK) < 0) {
idx = 256;
break;
}
if ((fd = open(ptydev, O_RDWR)) >= 0) {
if (access(ttydev, R_OK | W_OK) == 0)
return (fd);
close(fd);
}
}
return (-1);
}
#endif
#ifdef HAVE_DEV_PTMX
inline int svr_get_pty(void);
inline int
svr_get_pty(void)
{
int fd = -1;
/* open the STREAMS, clone device /dev/ptmx (master pty) */
if ((fd = open("/dev/ptmx", O_RDWR)) < 0) {
return (-1);
} else {
if (grantpt(fd) != 0) {
print_error("grantpt(%d) failed: %s\n", fd, strerror(errno));
return (-1);
} else if (unlockpt(fd) != 0) {
print_error("unlockpt(%d) failed: %s\n", fd, strerror(errno));
return (-1);
} else {
ptydev = ttydev = ptsname(fd);
if (ttydev == NULL) {
print_error("ptsname(%d) failed: %s\n", fd, strerror(errno));
return (-1);
}
}
}
return (fd);
}
#endif
#define PTYCHAR1 "pqrstuvwxyz"
#define PTYCHAR2 "0123456789abcdefghijklmnopqrstuvwxyz"
inline int gen_get_pty(void);
inline int
gen_get_pty(void)
{
static char pty_name[] = "/dev/pty??";
static char tty_name[] = "/dev/tty??";
int len = sizeof(tty_name);
char *c1, *c2;
int fd = -1;
ptydev = pty_name;
ttydev = tty_name;
for (c1 = PTYCHAR1; *c1; c1++) {
ptydev[len - 3] = ttydev[len - 3] = *c1;
for (c2 = PTYCHAR2; *c2; c2++) {
ptydev[len - 2] = ttydev[len - 2] = *c2;
if ((fd = open(ptydev, O_RDWR)) >= 0) {
if (access(ttydev, R_OK | W_OK) == 0)
return (fd);
close(fd);
}
}
}
return (-1);
}
int
get_pty(void)
{
int fd = -1;
#if defined(__sgi)
fd = sgi_get_pty();
#elif defined(HAVE_DEV_PTC)
fd = aix_get_pty();
#elif defined(HAVE_DEV_PTMX)
fd = svr_get_pty();
#elif defined(HAVE_SCO_PTYS)
fd = sco_get_pty();
#endif
/* Fall back on this method */
if (fd == -1) {
fd = gen_get_pty();
}
if (fd != -1) {
fcntl(fd, F_SETFL, O_NDELAY);
return (fd);
} else {
print_error("Can't open pseudo-tty -- %s\n", strerror(errno));
return (-1);
}
}
/* establish a controlling teletype for new session */
/*
* On some systems this can be done with ioctl() but on others we
* need to re-open the slave tty.
*/
int
get_tty(void)
{
int fd;
pid_t pid;
/*
* setsid() [or setpgrp] must be before open of the terminal,
* otherwise there is no controlling terminal (Solaris 2.4, HP-UX 9)
*/
#ifndef ultrix
# ifdef NO_SETSID
pid = setpgrp(0, 0);
# else
pid = setsid();
# endif
if (pid < 0) {
D_TTYMODE(("%s: setsid() failed: %s, PID == %d\n", rs_name, strerror(errno), pid));
}
#endif /* ultrix */
privileges(INVOKE);
if (ttydev == NULL) {
print_error("Slave tty device name is NULL. Failed to open slave pty.\n");
exit(EXIT_FAILURE);
} else if ((fd = open(ttydev, O_RDWR)) < 0) {
print_error("Can't open slave tty %s -- %s\n", ttydev, strerror(errno));
exit(EXIT_FAILURE);
} else {
D_TTY(("Opened slave tty %s\n", ttydev));
privileges(REVERT);
}
#if defined (__svr4__)
/*
* Push STREAMS modules:
* ptem: pseudo-terminal hardware emulation module.
* ldterm: standard terminal line discipline.
* ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
*/
ioctl(fd, I_PUSH, "ptem");
ioctl(fd, I_PUSH, "ldterm");
ioctl(fd, I_PUSH, "ttcompat");
#else /* __svr4__ */
{
unsigned int mode = 0620;
gid_t gid = my_rgid;
# ifdef PTY_GRP_NAME
{
struct group *gr = getgrnam(PTY_GRP_NAME);
if (gr) {
gid = gr->gr_gid;
mode = 0620;
}
}
# endif
privileges(INVOKE);
# ifndef __CYGWIN32__
fchown(fd, my_ruid, gid); /* fail silently */
fchmod(fd, mode);
# endif
privileges(REVERT);
}
#endif /* __svr4__ */
/*
* Close all file descriptors. If only stdin/out/err are closed,
* child processes remain alive upon deletion of the window.
*/
{
unsigned short i;
unsigned long max_fds;
/* get number of available file descriptors */
#ifdef _POSIX_VERSION
max_fds = sysconf(_SC_OPEN_MAX);
#else
max_fds = getdtablesize();
#endif
D_TTY(("Closing file descriptors 0-%d.\n", max_fds));
for (i = 0; i < max_fds; i++) {
if (i != fd)
close(i);
}
D_TTY(("...closed.\n"));
}
/* Reopen stdin, stdout and stderr over the tty file descriptor */
dup(fd); /* 0: stdin */
dup(fd); /* 1: stdout */
dup(fd); /* 2: stderr */
if (fd > 2)
close(fd);
privileges(INVOKE);
#ifdef ultrix
if ((fd = open("/dev/tty", O_RDONLY)) >= 0) {
ioctl(fd, TIOCNOTTY, 0);
close(fd);
} else {
# ifdef NO_SETSID
pid = setpgrp(0, 0);
# else
pid = setsid();
# endif
if (pid < 0) {
D_TTYMODE(("%s: setsid() failed: %s, PID == %d\n", rs_name, strerror(errno), pid));
}
}
/* no error, we could run with no tty to begin with */
#else /* ultrix */
# ifdef TIOCSCTTY
ioctl(0, TIOCSCTTY, 0);
# endif
/* set process group */
# if defined (_POSIX_VERSION) || defined (__svr4__)
tcsetpgrp(0, pid);
# elif defined (TIOCSPGRP)
ioctl(0, TIOCSPGRP, &pid);
# endif
/* svr4 problems: reports no tty, no job control */
/* # if !defined (__svr4__) && defined (TIOCSPGRP) */
close(open(ttydev, O_RDWR, 0));
/* # endif */
#endif /* ultrix */
privileges(REVERT);
D_TTY(("Returning fd == %d\n", fd));
return (fd);
}
/* debug_ttymode() */
#if DEBUG >= DEBUG_TTYMODE && defined(HAVE_TERMIOS_H)
/* cpp token stringize doesn't work on all machines <sigh> */
# define SHOW_TTY_FLAG(flag,name) do { \
if ((ttymode->c_iflag) & (flag)) { \
fprintf(stderr, "+%s ", name); \
} else { \
fprintf(stderr, "-%s ", name); \
} \
} while (0)
# define SHOW_CONT_CHAR(entry, name) fprintf(stderr, "%s=%#3o ", name, ttymode->c_cc[entry])
static void
debug_ttymode(ttymode_t *ttymode)
{
/* c_iflag bits */
fprintf(stderr, "Input flags: ");
SHOW_TTY_FLAG(IGNBRK, "IGNBRK");
SHOW_TTY_FLAG(BRKINT, "BRKINT");
SHOW_TTY_FLAG(IGNPAR, "IGNPAR");
SHOW_TTY_FLAG(PARMRK, "PARMRK");
SHOW_TTY_FLAG(INPCK, "INPCK");
SHOW_TTY_FLAG(ISTRIP, "ISTRIP");
SHOW_TTY_FLAG(INLCR, "INLCR");
SHOW_TTY_FLAG(IGNCR, "IGNCR");
SHOW_TTY_FLAG(ICRNL, "ICRNL");
SHOW_TTY_FLAG(IXON, "IXON");
SHOW_TTY_FLAG(IXOFF, "IXOFF");
# ifdef IUCLC
SHOW_TTY_FLAG(IUCLC, "IUCLC");
# endif
# ifdef IXANY
SHOW_TTY_FLAG(IXANY, "IXANY");
# endif
# ifdef IMAXBEL
SHOW_TTY_FLAG(IMAXBEL, "IMAXBEL");
# endif
fprintf(stderr, "\n");
fprintf(stderr, "Control character mappings: ");
SHOW_CONT_CHAR(VINTR, "VINTR");
SHOW_CONT_CHAR(VQUIT, "VQUIT");
SHOW_CONT_CHAR(VERASE, "VERASE");
SHOW_CONT_CHAR(VKILL, "VKILL");
SHOW_CONT_CHAR(VEOF, "VEOF");
SHOW_CONT_CHAR(VEOL, "VEOL");
# ifdef VEOL2
SHOW_CONT_CHAR(VEOL2, "VEOL2");
# endif
# ifdef VSWTC
SHOW_CONT_CHAR(VSWTC, "VSWTC");
# endif
# ifdef VSWTCH
SHOW_CONT_CHAR(VSWTCH, "VSWTCH");
# endif
SHOW_CONT_CHAR(VSTART, "VSTART");
SHOW_CONT_CHAR(VSTOP, "VSTOP");
SHOW_CONT_CHAR(VSUSP, "VSUSP");
# ifdef VDSUSP
SHOW_CONT_CHAR(VDSUSP, "VDSUSP");
# endif
# ifdef VREPRINT
SHOW_CONT_CHAR(VREPRINT, "VREPRINT");
# endif
# ifdef VDISCRD
SHOW_CONT_CHAR(VDISCRD, "VDISCRD");
# endif
# ifdef VWERSE
SHOW_CONT_CHAR(VWERSE, "VWERSE");
# endif
# ifdef VLNEXT
SHOW_CONT_CHAR(VLNEXT, "VLNEXT");
# endif
fprintf(stderr, "\n\n");
}
# undef SHOW_TTY_FLAG
# undef SHOW_CONT_CHAR
#endif /* DEBUG_TTYMODE */
/* get_ttymode() */
static void
get_ttymode(ttymode_t *tio)
{
#ifdef HAVE_TERMIOS_H
/*
* standard System V termios interface
*/
if (GET_TERMIOS(0, tio) < 0) {
/* return error - use system defaults */
tio->c_cc[VINTR] = CINTR;
tio->c_cc[VQUIT] = CQUIT;
tio->c_cc[VERASE] = CERASE;
tio->c_cc[VKILL] = CKILL;
tio->c_cc[VSTART] = CSTART;
tio->c_cc[VSTOP] = CSTOP;
tio->c_cc[VSUSP] = CSUSP;
# ifdef VDSUSP
tio->c_cc[VDSUSP] = CDSUSP;
# endif
# ifdef VREPRINT
tio->c_cc[VREPRINT] = CRPRNT;
# endif
# ifdef VDISCRD
tio->c_cc[VDISCRD] = CFLUSH;
# endif
# ifdef VWERSE
tio->c_cc[VWERSE] = CWERASE;
# endif
# ifdef VLNEXT
tio->c_cc[VLNEXT] = CLNEXT;
# endif
# ifdef VSTATUS
tio->c_cc[VSTATUS] = CSTATUS;
# endif
}
tio->c_cc[VEOF] = CEOF;
tio->c_cc[VEOL] = VDISABLE;
# ifdef VEOL2
tio->c_cc[VEOL2] = VDISABLE;
# endif
# ifdef VSWTC
tio->c_cc[VSWTC] = VDISABLE;
# endif
# ifdef VSWTCH
tio->c_cc[VSWTCH] = VDISABLE;
# endif
# if VMIN != VEOF
tio->c_cc[VMIN] = 1;
# endif
# if VTIME != VEOL
tio->c_cc[VTIME] = 0;
# endif
/* input modes */
tio->c_iflag = (BRKINT | IGNPAR | ICRNL | IXON
# ifdef IMAXBEL
| IMAXBEL
# endif
);
/* output modes */
tio->c_oflag = (OPOST | ONLCR);
/* control modes */
tio->c_cflag = (CS8 | CREAD);
/* line discipline modes */
tio->c_lflag = (ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK
# if defined (ECHOCTL) && defined (ECHOKE)
| ECHOCTL | ECHOKE
# endif
);
#if defined(FORCE_BACKSPACE) && 0
PrivMode(1, PrivMode_BackSpace);
tio->c_cc[VERASE] = '\b'; /* force ^H for stty setting... */
SET_TERMIOS(0, tio); /* ...and make it stick -- casey */
#elif defined(FORCE_DELETE) && 0
PrivMode(0, PrivMode_BackSpace);
tio->c_cc[VERASE] = 0x7f; /* force ^? for stty setting... */
SET_TERMIOS(0, tio); /* ...and make it stick -- casey */
#else
PrivMode((tio->c_cc[VERASE] == '\b'), PrivMode_BackSpace);
#endif
#else /* HAVE_TERMIOS_H */
/*
* sgtty interface
*/
/* get parameters -- gtty */
if (ioctl(0, TIOCGETP, &(tio->sg)) < 0) {
tio->sg.sg_erase = CERASE; /* ^H */
tio->sg.sg_kill = CKILL; /* ^U */
}
tio->sg.sg_flags = (CRMOD | ECHO | EVENP | ODDP);
/* get special characters */
if (ioctl(0, TIOCGETC, &(tio->tc)) < 0) {
tio->tc.t_intrc = CINTR; /* ^C */
tio->tc.t_quitc = CQUIT; /* ^\ */
tio->tc.t_startc = CSTART; /* ^Q */
tio->tc.t_stopc = CSTOP; /* ^S */
tio->tc.t_eofc = CEOF; /* ^D */
tio->tc.t_brkc = -1;
}
/* get local special chars */
if (ioctl(0, TIOCGLTC, &(tio->lc)) < 0) {
tio->lc.t_suspc = CSUSP; /* ^Z */
tio->lc.t_dsuspc = CDSUSP; /* ^Y */
tio->lc.t_rprntc = CRPRNT; /* ^R */
tio->lc.t_flushc = CFLUSH; /* ^O */
tio->lc.t_werasc = CWERASE; /* ^W */
tio->lc.t_lnextc = CLNEXT; /* ^V */
}
/* get line discipline */
ioctl(0, TIOCGETD, &(tio->line));
# ifdef NTTYDISC
tio->line = NTTYDISC;
# endif /* NTTYDISC */
tio->local = (LCRTBS | LCRTERA | LCTLECH | LPASS8 | LCRTKIL);
# ifdef FORCE_BACKSPACE
PrivMode(1, PrivMode_BackSpace);
tio->sg.sg_erase = '\b';
SET_TTYMODE(0, tio);
# elif defined (FORCE_DELETE)
PrivMode(0, PrivMode_BackSpace);
tio->sg.sg_erase = 0x7f;
SET_TTYMODE(0, tio);
# else
PrivMode((tio->sg.sg_erase == '\b'), PrivMode_BackSpace);
# endif
#endif /* HAVE_TERMIOS_H */
}
/* Xlocale */
XFontSet
create_fontset(const char *font1, const char *font2)
{
XFontSet fontset = 0;
char *fontname, **ml, *ds;
int mc;
const char fs_base[] = ",-misc-fixed-*-r-*-*-*-120-*-*-*-*-*-*,*";
ASSERT(font1 != NULL);
if (font2) {
fontname = MALLOC(strlen(font1) + strlen(font2) + sizeof(fs_base) + 2);
if (fontname) {
strcpy(fontname, font1);
strcat(fontname, ",");
strcat(fontname, font2);
strcat(fontname, fs_base);
}
} else {
fontname = MALLOC(strlen(font1) + sizeof(fs_base) + 1);
if (fontname) {
strcpy(fontname, font1);
strcat(fontname, fs_base);
}
}
if (fontname) {
setlocale(LC_ALL, "");
fontset = XCreateFontSet(Xdisplay, fontname, &ml, &mc, &ds);
FREE(fontname);
if (mc) {
XFreeStringList(ml);
fontset = 0;
}
}
return fontset;
}
#if defined(USE_XIM) || defined(MULTI_CHARSET)
#ifdef USE_XIM
static int xim_real_init(void);
# ifdef USE_X11R6_XIM
static void xim_destroy_cb(XIM xim, XPointer client_data, XPointer call_data);
static void xim_instantiate_cb(Display * display, XPointer client_data, XPointer call_data);
# endif
#endif
void
init_locale(void)
{
char *locale = NULL;
locale = setlocale(LC_ALL, "");
XSetLocaleModifiers("");
TermWin.fontset = (XFontSet) 0;
if ((locale == NULL) || (!XSupportsLocale())) {
print_warning("Locale not supported; defaulting to portable \"C\" locale.\n");
locale = setlocale(LC_ALL, "C");
XSetLocaleModifiers("");
REQUIRE(locale);
REQUIRE(XSupportsLocale());
} else {
#ifdef USE_XIM
#ifdef MULTI_CHARSET
TermWin.fontset = create_fontset(etfonts[def_font_idx], etmfonts[def_font_idx]);
#else
TermWin.fontset = create_fontset(etfonts[def_font_idx], "-misc-fixed-medium-r-semicondensed--13-*-75-*-c-*-iso10646-1");
#endif
if ((TermWin.fontset == (XFontSet) 0) || (xim_real_init() != -1)) {
return;
}
# ifdef USE_X11R6_XIM
XRegisterIMInstantiateCallback(Xdisplay, NULL, NULL, NULL, xim_instantiate_cb, NULL);
# endif
#endif
}
}
#endif /* USE_XIM || MULTI_CHARSET */
#ifdef USE_XIM
static void
xim_set_size(XRectangle * size)
{
size->x = TermWin.internalBorder;
size->y = TermWin.internalBorder + bbar_calc_docked_height(BBAR_DOCKED_TOP);
size->width = Width2Pixel(TermWin.ncol);
size->height = Height2Pixel(TermWin.nrow);
}
static void
xim_set_color(unsigned long *fg, unsigned long *bg)
{
*fg = PixColors[fgColor];
*bg = PixColors[bgColor];
}
static void
xim_send_spot(void)
{
XPoint spot;
static XPoint oldSpot = { -1, -1 };
XVaNestedList preedit_attr;
if (xim_input_context == NULL) {
return;
}
if (xim_input_style & XIMPreeditPosition) {
xim_get_position(&spot);
if (spot.x != oldSpot.x || spot.y != oldSpot.y) {
oldSpot.x = spot.x;
oldSpot.y = spot.y;
preedit_attr = XVaCreateNestedList(0, XNSpotLocation, &spot, NULL);
XSetICValues(xim_input_context, XNPreeditAttributes, preedit_attr, NULL);
XFree(preedit_attr);
}
}
}
static void
xim_get_area(XRectangle * preedit_rect, XRectangle * status_rect, XRectangle * needed_rect)
{
preedit_rect->x = needed_rect->width + (scrollbar_is_visible() && !(Options & Opt_scrollbar_right) ? (scrollbar_trough_width()) : 0);
preedit_rect->y = Height2Pixel(TermWin.nrow - 1);
preedit_rect->width = Width2Pixel(TermWin.ncol + 1) - needed_rect->width + (!(Options & Opt_scrollbar_right) ? (scrollbar_trough_width()) : 0);
preedit_rect->height = Height2Pixel(1);
status_rect->x = (scrollbar_is_visible() && !(Options & Opt_scrollbar_right)) ? (scrollbar_trough_width()) : 0;
status_rect->y = Height2Pixel(TermWin.nrow - 1);
status_rect->width = needed_rect->width ? needed_rect->width : Width2Pixel(TermWin.ncol + 1);
status_rect->height = Height2Pixel(1);
}
#ifdef USE_X11R6_XIM
static void
xim_destroy_cb(XIM xim, XPointer client_data, XPointer call_data)
{
xim_input_context = NULL;
xim_input_method = NULL;
XRegisterIMInstantiateCallback(Xdisplay, NULL, NULL, NULL, xim_instantiate_cb, NULL);
xim = NULL;
client_data = call_data = (XPointer) 0;
}
static void
xim_instantiate_cb(Display * display, XPointer client_data, XPointer call_data)
{
xim_real_init();
if (xim_input_context) {
XUnregisterIMInstantiateCallback(Xdisplay, NULL, NULL, NULL, xim_instantiate_cb, NULL);
}
display = NULL;
client_data = call_data = (XPointer) 0;
}
#endif
static int
xim_real_init(void)
{
char *p, *s, buf[64], tmp[1024];
char *end, *next_s;
XIMStyles *xim_styles = NULL;
int found;
XPoint spot;
XRectangle rect, status_rect, needed_rect;
unsigned long fg, bg;
XVaNestedList preedit_attr = NULL;
XVaNestedList status_attr = NULL;
REQUIRE_RVAL(xim_input_context == NULL, -1);
xim_input_style = 0;
if (rs_input_method && *rs_input_method) {
strncpy(tmp, rs_input_method, sizeof(tmp) - 1);
for (s = tmp; *s; s = next_s + 1) {
for (; *s && isspace(*s); s++);
if (!*s) {
break;
}
for (end = s; (*end && (*end != ',')); end++);
for (next_s = end--; ((end >= s) && isspace(*end)); end--);
*(end + 1) = '\0';
if (*s) {
snprintf(buf, sizeof(buf), "@im=%s", s);
if (((p = XSetLocaleModifiers(buf)) != NULL) && (*p) && ((xim_input_method = XOpenIM(Xdisplay, NULL, NULL, NULL)) != NULL)) {
break;
}
}
if (!*next_s) {
break;
}
}
}
/* try with XMODIFIERS env. var. */
if (xim_input_method == NULL && getenv("XMODIFIERS") && (p = XSetLocaleModifiers("")) != NULL && *p) {
xim_input_method = XOpenIM(Xdisplay, NULL, NULL, NULL);
}
/* try with no modifiers base */
if (xim_input_method == NULL && (p = XSetLocaleModifiers("@im=none")) != NULL && *p) {
xim_input_method = XOpenIM(Xdisplay, NULL, NULL, NULL);
}
if (xim_input_method == NULL) {
xim_input_method = XOpenIM(Xdisplay, NULL, NULL, NULL);
}
if (xim_input_method == NULL) {
return -1;
}
#ifdef USE_X11R6_XIM
{
XIMCallback destroy_cb;
destroy_cb.callback = xim_destroy_cb;
destroy_cb.client_data = NULL;
if (XSetIMValues(xim_input_method, XNDestroyCallback, &destroy_cb, NULL)) {
print_error("Could not set destroy callback to IM\n");
}
}
#endif
if ((XGetIMValues(xim_input_method, XNQueryInputStyle, &xim_styles, NULL)) || (!xim_styles)) {
print_error("input method doesn't support any style\n");
XCloseIM(xim_input_method);
return -1;
}
strncpy(tmp, (rs_preedit_type ? rs_preedit_type : "OverTheSpot,OffTheSpot,Root"), sizeof(tmp) - 1);
for (found = 0, s = tmp; *s && !found; s = next_s + 1) {
unsigned short i;
for (; *s && isspace(*s); s++);
if (!*s) {
break;
}
for (end = s; (*end && (*end != ',')); end++);
for (next_s = end--; ((end >= s) && isspace(*end)); end--);
*(end + 1) = '\0';
if (!strcmp(s, "OverTheSpot")) {
xim_input_style = (XIMPreeditPosition | XIMStatusNothing);
} else if (!strcmp(s, "OffTheSpot")) {
xim_input_style = (XIMPreeditArea | XIMStatusArea);
} else if (!strcmp(s, "Root")) {
xim_input_style = (XIMPreeditNothing | XIMStatusNothing);
}
for (i = 0; i < xim_styles->count_styles; i++) {
if (xim_input_style == xim_styles->supported_styles[i]) {
found = 1;
break;
}
}
}
XFree(xim_styles);
if (found == 0) {
print_error("input method doesn't support my preedit type\n");
XCloseIM(xim_input_method);
return -1;
}
if ((xim_input_style != (XIMPreeditNothing | XIMStatusNothing))
&& (xim_input_style != (XIMPreeditArea | XIMStatusArea))
&& (xim_input_style != (XIMPreeditPosition | XIMStatusNothing))) {
print_error("This program does not support the preedit type\n");
XCloseIM(xim_input_method);
return -1;
}
if (xim_input_style & XIMPreeditPosition) {
xim_set_size(&rect);
xim_get_position(&spot);
xim_set_color(&fg, &bg);
preedit_attr = XVaCreateNestedList(0, XNArea, &rect, XNSpotLocation, &spot, XNForeground, fg, XNBackground, bg, XNFontSet, TermWin.fontset, NULL);
} else if (xim_input_style & XIMPreeditArea) {
xim_set_color(&fg, &bg);
/* The necessary width of preedit area is unknown until create input context. */
needed_rect.width = 0;
xim_get_area(&rect, &status_rect, &needed_rect);
preedit_attr = XVaCreateNestedList(0, XNArea, &rect, XNForeground, fg, XNBackground, bg, XNFontSet, TermWin.fontset, NULL);
status_attr = XVaCreateNestedList(0, XNArea, &status_rect, XNForeground, fg, XNBackground, bg, XNFontSet, TermWin.fontset, NULL);
}
xim_input_context =
XCreateIC(xim_input_method, XNInputStyle, xim_input_style, XNClientWindow, TermWin.parent, XNFocusWindow, TermWin.parent,
preedit_attr ? XNPreeditAttributes : NULL, preedit_attr, status_attr ? XNStatusAttributes : NULL, status_attr, NULL);
if (preedit_attr) {
XFree(preedit_attr);
}
if (status_attr) {
XFree(status_attr);
}
if (xim_input_context == NULL) {
print_error("Failed to create input context\n");
XCloseIM(xim_input_method);
return -1;
}
if (xim_input_style & XIMPreeditArea)
xim_set_status_position();
return 0;
}
void
xim_set_status_position(void)
{
XRectangle preedit_rect, status_rect, *needed_rect, rect;
XVaNestedList preedit_attr, status_attr;
XPoint spot;
REQUIRE(xim_input_context != NULL);
if (xim_input_style & XIMPreeditPosition) {
xim_set_size(&rect);
xim_get_position(&spot);
preedit_attr = XVaCreateNestedList(0, XNArea, &rect, XNSpotLocation, &spot, NULL);
XSetICValues(xim_input_context, XNPreeditAttributes, preedit_attr, NULL);
XFree(preedit_attr);
} else if (xim_input_style & XIMPreeditArea) {
/* Getting the necessary width of preedit area */
status_attr = XVaCreateNestedList(0, XNAreaNeeded, &needed_rect, NULL);
XGetICValues(xim_input_context, XNStatusAttributes, status_attr, NULL);
XFree(status_attr);
xim_get_area(&preedit_rect, &status_rect, needed_rect);
preedit_attr = XVaCreateNestedList(0, XNArea, &preedit_rect, NULL);
status_attr = XVaCreateNestedList(0, XNArea, &status_rect, NULL);
XSetICValues(xim_input_context, XNPreeditAttributes, preedit_attr, XNStatusAttributes, status_attr, NULL);
XFree(preedit_attr);
XFree(status_attr);
}
}
void
xim_set_fontset(void)
{
XVaNestedList preedit_attr = NULL;
XVaNestedList status_attr = NULL;
REQUIRE(xim_input_context != NULL);
if (xim_input_style & XIMStatusArea) {
status_attr = XVaCreateNestedList(0, XNFontSet, TermWin.fontset, NULL);
}
if (xim_input_style & (XIMPreeditArea | XIMPreeditPosition)) {
preedit_attr = XVaCreateNestedList(0, XNFontSet, TermWin.fontset, NULL);
}
if (status_attr && preedit_attr) {
XSetICValues(xim_input_context, XNPreeditAttributes, preedit_attr, XNStatusAttributes, status_attr, NULL);
} else if (preedit_attr) {
XSetICValues(xim_input_context, XNPreeditAttributes, preedit_attr, NULL);
} else if (status_attr) {
XSetICValues(xim_input_context, XNStatusAttributes, status_attr, NULL);
}
if (preedit_attr) {
XFree(preedit_attr);
}
if (status_attr) {
XFree(status_attr);
}
}
#endif /* USE_XIM */
/* run_command() */
/*
* Run the command in a subprocess and return a file descriptor for the
* master end of the pseudo-teletype pair with the command talking to
* the slave.
*/
int
run_command(char **argv)
{
ttymode_t tio;
int ptyfd;
/* Save and then give up any super-user privileges */
privileges(IGNORE);
ptyfd = get_pty();
if (ptyfd < 0)
return (-1);
AT_LEAST(num_fds, ((unsigned int) (ptyfd + 1)));
/* store original tty status for restoration clean_exit() -- rgg 04/12/95 */
lstat(ttydev, &ttyfd_stat);
D_CMD(("Original settings of %s are mode %o, uid %d, gid %d\n", ttydev, ttyfd_stat.st_mode, ttyfd_stat.st_uid, ttyfd_stat.st_gid));
/* install exit handler for cleanup */
#ifdef HAVE_ATEXIT
atexit(clean_exit);
#else
# if defined (__sun__)
on_exit(clean_exit, NULL); /* non-ANSI exit handler */
# else
print_error("no atexit(), UTMP entries can't be cleaned\n");
# endif
#endif
/*
* get tty settings before fork()
* and make a reasonable guess at the value for BackSpace
*/
get_ttymode(&tio);
/* add Backspace value */
SavedModes |= (PrivateModes & PrivMode_BackSpace);
/* add value for scrollbar */
if (scrollbar_is_visible()) {
PrivateModes |= PrivMode_scrollbar;
SavedModes |= PrivMode_scrollbar;
}
#if DEBUG >= DEBUG_TTYMODE && defined(HAVE_TERMIOS_H)
if (DEBUG_LEVEL >= DEBUG_TTYMODE) {
debug_ttymode(&tio);
}
#endif
D_CMD(("Forking\n"));
cmd_pid = fork();
D_CMD(("After fork(), cmd_pid == %d\n", cmd_pid));
if (cmd_pid < 0) {
print_error("fork(): %s\n", strerror(errno));
return (-1);
}
if (cmd_pid == 0) {
/* Child process. Reset the signal handlers right away. */
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
signal(SIGSEGV, SIG_DFL);
signal(SIGBUS, SIG_DFL);
signal(SIGABRT, SIG_DFL);
signal(SIGFPE, SIG_DFL);
signal(SIGILL, SIG_DFL);
signal(SIGSYS, SIG_DFL);
signal(SIGALRM, SIG_DFL);
#ifdef SIGTSTP
signal(SIGTSTP, SIG_IGN);
signal(SIGTTIN, SIG_IGN);
signal(SIGTTOU, SIG_IGN);
#endif
#ifdef HAVE_UNSETENV
unsetenv("LINES");
unsetenv("COLUMNS");
unsetenv("TERMCAP");
#endif
get_tty();
SET_TTYMODE(0, &tio);
/* become virtual console, fail silently */
if (Options & Opt_console) {
int fd = 1;
privileges(INVOKE);
#ifdef SRIOCSREDIR
fd = open(CONSOLE, O_WRONLY);
if (fd < 0 || ioctl(fd, SRIOCSREDIR, 0) < 0) {
if (fd >= 0)
close(fd);
}
#elif defined(TIOCCONS)
ioctl(0, TIOCCONS, &fd);
#endif /* SRIOCSREDIR */
privileges(REVERT);
}
tt_winsize(0); /* set window size */
/* Permanently revoke all privileges for the child process.
Root shells for everyone are tres uncool.... ;^) -- mej */
#ifdef _HPUX_SOURCE
setresuid(my_ruid, my_ruid, my_euid);
setresgid(my_rgid, my_rgid, my_egid);
#else
/* No special treatment is needed for systems with saved uids/gids,
because the exec*() calls reset the saved uid/gid to the
effective uid/gid -- mej */
# ifndef __CYGWIN32__
setregid(my_rgid, my_rgid);
setreuid(my_ruid, my_ruid);
# endif /* __CYGWIN32__ */
#endif /* _HPUX_SOURCE */
D_UTMP(("Child process reset\n"));
my_euid = my_ruid;
my_egid = my_rgid;
#ifdef HAVE_USLEEP
usleep(10); /* Attempt to force a context switch so that the parent runs before us. */
#else
sleep(1); /* ugliness */
#endif
D_CMD(("[%d] About to spawn shell\n", getpid()));
if (chdir(initial_dir)) {
print_warning("Unable to chdir to \"%s\" -- %s\n", initial_dir, strerror(errno));
}
if (argv != NULL) {
#if DEBUG >= DEBUG_CMD
if (DEBUG_LEVEL >= DEBUG_CMD) {
int i;
for (i = 0; argv[i]; i++) {
DPRINTF(("argv[%d] = \"%s\"\n", i, argv[i]));
}
}
#endif
D_CMD(("[%d] execvp(\"%s\", %8p) is next. I'm outta here!\n", getpid(), NONULL(argv[0]), argv));
execvp(argv[0], argv);
print_error("execvp() failed, cannot execute \"%s\": %s\n", argv[0], strerror(errno));
} else {
const char *argv0, *shell;
if ((shell = getenv("SHELL")) == NULL || *shell == '\0')
shell = "/bin/sh";
argv0 = my_basename(shell);
if (Options & Opt_login_shell) {
char *p = MALLOC(strlen(argv0) + 2);
p[0] = '-';
strcpy(&p[1], argv0);
argv0 = p;
}
execlp(shell, argv0, NULL);
print_error("execlp() failed, cannot execute \"%s\": %s\n", shell, strerror(errno));
}
sleep(3); /* Sleep to make sure fork() returns in the parent, and so user can read error message */
exit(EXIT_FAILURE);
}
#ifdef UTMP_SUPPORT
privileges(RESTORE);
if (Options & Opt_write_utmp) {
add_utmp_entry(ttydev, display_name, ptyfd);
}
privileges(IGNORE);
#endif
D_CMD(("Returning ptyfd == %d\n", ptyfd));
return (ptyfd);
}
#ifdef ESCREEN
/***************************************************************************/
/* Escreen: callbacks */
/***********************/
static int
set_scroll_x(void *xd, int x)
{
USE_VAR(xd);
D_ESCREEN(("%d\n", x));
return NS_FAIL;
}
static int
set_scroll_y(void *xd, int y)
{
USE_VAR(xd);
D_ESCREEN(("%d\n", y));
return NS_FAIL;
}
static int
set_scroll_w(void *xd, int w)
{
USE_VAR(xd);
D_ESCREEN(("%d\n", w));
return NS_FAIL;
}
static int
set_scroll_h(void *xd, int h)
{
USE_VAR(xd);
D_ESCREEN(("%d\n", h));
return NS_FAIL;
}
static int
redraw(void *xd)
{
USE_VAR(xd);
D_ESCREEN(("redraw\n"));
return NS_FAIL;
}
static int
redraw_xywh(void *xd, int x, int y, int w, int h)
{
USE_VAR(xd);
D_ESCREEN(("%d,%d %dx%d\n", x, y, w, h));
return NS_FAIL;
}
static button_t *screen_button_create(char *text, char code)
{
button_t *b;
char p[3];
REQUIRE_RVAL(text, NULL);
REQUIRE_RVAL(*text, NULL);
b = button_create(text);
REQUIRE_RVAL(b, NULL);
p[0] = NS_SCREEN_ESCAPE;
p[1] = code;
p[2] = '\0';
button_set_action(b, ACTION_ECHO, p);
return b;
}
/* add a new screen display to button bar.
if our user's configured a bbar, we'll add to that,
otherwise, we'll create one.
xd address of the pointer to the buttonbar in question
after insert after which display?
name the display's name */
static int
ins_disp(void *xd, int after, int as, char *name)
{
buttonbar_t *bbar;
button_t *button;
REQUIRE_RVAL(xd, NS_FAIL);
REQUIRE_RVAL(name, NS_FAIL);
REQUIRE_RVAL(*name, NS_FAIL);
bbar = *((buttonbar_t **) xd);
if (!(button = screen_button_create(name, '0' + as))) {
return NS_FAIL;
}
if ((bbar = bbar_insert_button(bbar, button, after, FALSE))) {
*((buttonbar_t **) xd) = bbar;
return NS_SUCC;
}
button_free(button);
return NS_FAIL;
}
#if 0
/* add supa-dupa right buttons for screen-features.
if our user's configured a bbar, we'll add to that,
otherwise, we'll create one. */
static int
add_screen_ctl_button(buttonbar_t **xd, char *name, char key)
{
buttonbar_t *bbar;
button_t *button;
REQUIRE_RVAL(xd, NS_FAIL);
REQUIRE_RVAL(name, NS_FAIL);
REQUIRE_RVAL(*name, NS_FAIL);
bbar = *xd;
if (!(button = screen_button_create(name, key)))
return NS_FAIL;
if ((bbar = bbar_insert_button(bbar, button, -1, TRUE))) {
*xd = bbar;
return NS_SUCC;
}
button_free(button);
return NS_FAIL;
}
#endif
/* delete n'th button
xd address of the pointer to the buttonbar in question
n index of the button (not screen, not data -- the button) */
static int
del_disp(void *xd, int n)
{
buttonbar_t *bbar = *((buttonbar_t **) xd);
button_t *button, *b2;
int bi = n;
REQUIRE_RVAL(bbar, NS_FAIL);
REQUIRE_RVAL(bbar->buttons, NS_FAIL);
b2 = button = bbar->buttons;
if (n == 0) {
bbar->buttons = bbar->buttons->next;
if (bbar->current == button) {
bbar->current = bbar->buttons;
}
} else {
for (; n > 0; n--) {
b2 = button;
if (!(button = button->next)) {
D_ESCREEN(("cannot delete button %d: does not exist...\n", bi));
return NS_FAIL;
}
}
b2->next = button->next;
if (bbar->current == button) {
bbar->current = b2;
}
}
button->next = NULL;
button_free(button);
bbar_redraw(bbar);
return NS_SUCC;
}
/* update the button-representation of a screen-display.
xd address of the pointer to the buttonbar in question
n the button's index (in the list of buttons)
flags the new flags for the display (or -1 to ignore)
name the new name for the display (or NULL)
<- error code */
static int
upd_disp(void *xd, int n, int flags, char *name)
{
buttonbar_t *bbar = *((buttonbar_t **) xd);
button_t *button;
REQUIRE_RVAL(bbar, NS_FAIL);
REQUIRE_RVAL(bbar->buttons, NS_FAIL);
button = bbar->buttons;
for (; (n > 0) && (button->next); n--, button = button->next);
if (name && (!button->text || strcmp(name, button->text))) {
button_set_text(button, name);
}
if (flags >= 0) {
button->flags = flags;
}
bbar_redraw(bbar);
return NS_SUCC;
}
/* expire all buttons
xd address of the pointer to the buttonbar in question
n how many buttons do we want to throw out (normally all of them)?
<- error code */
static int
expire_buttons(void *xd, int n)
{
buttonbar_t *bbar = *((buttonbar_t **) xd);
button_t *b, *p;
REQUIRE_RVAL(bbar, NS_FAIL);
if (n < 1) {
return NS_FAIL;
}
if ((b = bbar->buttons)) {
for (; n; n--) {
p = b;
b = b->next;
}
p->next = NULL;
button_free(bbar->buttons);
bbar->buttons = b;
}
return NS_SUCC;
}
/* display a status line the screen program sent us */
static int
err_msg(void *xd, int err, char *msg)
{
char *sc[] = { "Copy mode", "Bell in", "Wuff, Wuff!!" };
int n, nsc = sizeof(sc) / sizeof(char *);
/* there are certain things that would make sense if we were displaying
a status-line; they do not, however, warrant an alert-box, so we drop
them here. */
USE_VAR(xd);
USE_VAR(err);
if (strlen(msg)) {
for (n = 0; n < nsc; n++) {
if (!strncmp(msg, sc[n], strlen(sc[n]))) {
break;
}
}
if (n >= nsc) {
menu_dialog(NULL, msg, 0, NULL, NULL);
}
}
return NS_SUCC;
}
/* send text to the application (normally "screen") in the terminal */
static int
inp_text(void *xd, int id, char *txt)
{
USE_VAR(xd);
USE_VAR(id);
tt_write(txt, strlen(txt));
return NS_SUCC;
}
/* open a dialog */
static int
input_dialog(void *xd, char *prompt, int maxlen, char **retstr, int (*inp_tab) (void *, char *, size_t, size_t))
{
switch (menu_dialog(xd, prompt, maxlen, retstr, inp_tab)) {
case 0:
return NS_SUCC;
case -2:
return NS_USER_CXL;
default:
return NS_FAIL;
}
}
/* run a program (normally "screen") inside the terminal */
static int
exe_prg(void *xd, char **argv)
{
USE_VAR(xd);
return run_command(argv);
}
/****** Azundris' playthings :-) ******/
#define DIRECT_MASK (~(RS_Cursor|RS_Select|RS_fontMask))
#define COLOUR_MASK (RS_fgMask|RS_bgMask)
#define DIRECT_SET_SCREEN(x,y,fg,bg) (screen.text[ys+y])[x]=fg; (screen.rend[ys+y])[x]=bg&DIRECT_MASK;
#define CLEAR (1<<16)
static void
direct_write_screen(int x, int y, char *fg, rend_t bg)
{
int ys = TermWin.saveLines - TermWin.view_start;
text_t *t = screen.text[ys + y];
rend_t *r = screen.rend[ys + y];
REQUIRE(fg);
while (*fg && (x >= 0) && (x < TermWin.ncol)) {
t[x] = *(fg++);
r[x++] = bg & DIRECT_MASK;
}
}
static void
bosconian(int n)
{
int x, y;
int ys = TermWin.saveLines - TermWin.view_start;
for (; n != 0; n--) {
for (y = 0; y < TermWin.nrow; y++) {
text_t *t = screen.text[ys + y];
rend_t *r = screen.rend[ys + y];
for (x = 0; x < TermWin.ncol; x++) {
t[x] = random() & 0xff;
r[x] = random() & COLOUR_MASK;
}
}
scr_refresh(FAST_REFRESH);
}
}
static void
unbosconian(void)
{
int x, y;
int ys = TermWin.saveLines - TermWin.view_start;
rend_t bg;
do {
bg = CLEAR;
for (y = 0; (bg == CLEAR) && y < TermWin.nrow; y++) {
rend_t *r = screen.rend[ys + y];
for (x = 0; (bg == CLEAR) && x < TermWin.ncol; x++) {
if (r[x] != CLEAR) {
bg = r[x];
}
}
}
if (bg != CLEAR) {
for (y = 0; y < TermWin.nrow; y++) {
text_t *t = screen.text[ys + y];
rend_t *r = screen.rend[ys + y];
for (x = 0; x < TermWin.ncol; x++) {
if (r[x] == bg) {
r[x] = CLEAR;
t[x] = ' ';
}
}
}
scr_refresh(FAST_REFRESH);
}
} while (bg != CLEAR);
}
#undef DIRECT_MASK
#undef COLOUR_MASK
#undef DIRECT_SET_SCREEN
static void
matrix(int n)
{
int x, y, w, f;
int ys = TermWin.saveLines - TermWin.view_start;
text_t *s = MALLOC(TermWin.ncol);
text_t *t, *t2;
rend_t *r, *r2;
if (!s) {
puts("fail");
return;
}
MEMSET(s, 0, TermWin.ncol);
#define MATRIX_HI CLEAR
#define MATRIX_LO ((4<<8)|CLEAR)
while (n--) {
for (x = 0; x < TermWin.ncol; x++) {
if (!(random() & 3)) {
if ((y = s[x])) {
w = random() & 15;
} else {
w = 0;
}
t = screen.text[ys + y];
r = screen.rend[ys + y];
switch (w) {
case 0: /* restart */
if (s[x]) {
r[x] = MATRIX_LO;
s[x] = 0;
t = screen.text[ys];
r = screen.rend[ys];
}
r[x] = MATRIX_HI;
t[x] = random() & 0xff;
s[x]++;
/* fall-through */
case 1: /* continue */
case 2:
case 3:
for (f = random() & 7; f != 0; f--) {
if (y < TermWin.nrow - 1) {
t2 = screen.text[ys + y + 1];
r2 = screen.rend[ys + y + 1];
t2[x] = t[x];
r2[x] = r[x];
s[x]++;
y++;
} else {
s[x] = 0;
f = 0;
}
r[x] = MATRIX_LO;
t[x] = random() & 0xff;
if (f) {
scr_refresh(FAST_REFRESH);
t = screen.text[ys + y];
r = screen.rend[ys + y];
}
}
break;
default:
t[x] = random() & 0xff; /* hold */
}
}
}
scr_refresh(FAST_REFRESH);
}
FREE(s);
}
#undef MATRIX_HI
#undef MATRIX_LO
/* do whatever for ms milli-seconds */
static int
waitstate(void *xd, int ms)
{
int y = 1;
time_t dur = (time_t) (ms / 1000);
USE_VAR(xd);
if (!(random() & 7)) {
if (!(random() & 3)) {
matrix(31);
unbosconian();
}
bosconian(4);
unbosconian();
}
direct_write_screen(0, y++, " **** COMMODORE 64 BASIC V2 ****", (0 << 8) | CLEAR);
direct_write_screen(0, y++, " 64K RAM SYSTEM 38911 BASIC BYTES FREE", (0 << 8) | CLEAR);
y += 2;
direct_write_screen(0, y++, "READY.", (0 << 8) | CLEAR);
screen.row = y;
screen.col = 0;
scr_refresh(FAST_REFRESH);
sleep(dur);
return 0;
}
#undef CLEAR
/* Set everything up for escreen mode */
int
escreen_init(char **argv)
{
int ns_err;
_ns_efuns *efuns;
efuns = ns_new_efuns();
ns_register_ssx(efuns, set_scroll_x);
ns_register_ssy(efuns, set_scroll_y);
ns_register_ssw(efuns, set_scroll_w);
ns_register_ssh(efuns, set_scroll_h);
ns_register_red(efuns, redraw);
ns_register_rda(efuns, redraw_xywh);
ns_register_exb(efuns, expire_buttons);
ns_register_ins(efuns, ins_disp);
ns_register_del(efuns, del_disp);
ns_register_upd(efuns, upd_disp);
ns_register_err(efuns, err_msg);
ns_register_exe(efuns, exe_prg);
ns_register_txt(efuns, inp_text);
ns_register_inp(efuns, input_dialog);
ns_register_tab(efuns, menu_tab);
ns_register_fun(efuns, waitstate);
if (!TermWin.screen_mode) {
return run_command(argv);
} else if ((TermWin.screen = ns_attach_by_URL(rs_url, rs_hop, &efuns, &ns_err, (void *) &buttonbar))) {
button_t *button;
menu_t *m;
menuitem_t *i;
if (rs_delay >= 0) {
TermWin.screen->delay = rs_delay; /* more flexible ways later */
}
if ((m = menu_create(NS_MENU_TITLE))) {
char *sc[] = {
/* display functions */
"New", "\x01:screen\r",
"New ...", "\x01\x03\x01\x41",
"Backlog ...", "\x01\x1b",
"Monitor", "\x01M",
"Close", "\x01k",
"-", "",
/* region functions */
"Split", "\x01S",
"Unsplit", "\x01Q",
"Prvs region", NS_SCREEN_PRVS_REG,
"Next region", "\x01\t",
"Kill region", "\x01X",
"-", "",
/* screen functions */
"Reset", NS_SCREEN_INIT,
"Statement", "\x01:",
"-", ""
};
int n, nsc = sizeof(sc) / sizeof(char *);
if (menu_list) {
for (n = 0; n < menu_list->nummenus; n++) { /* blend in w/ l&f */
if (menu_list->menus[n]->font) {
m->font = menu_list->menus[n]->font;
m->fwidth = menu_list->menus[n]->fwidth;
m->fheight = menu_list->menus[n]->fheight;
#ifdef MULTI_CHARSET
m->fontset = menu_list->menus[n]->fontset;
#endif
break;
}
}
}
for (n = 0; n < (nsc - 1); n += 2) {
if (!strcmp(sc[n], "-")) {
/* separator */
if ((i = menuitem_create(NULL))) {
menu_add_item(m, i);
menuitem_set_action(i, MENUITEM_SEP, NULL);
}
} else if ((i = menuitem_create(sc[n]))) {
/* menu entry */
menuitem_set_action(i, n && strcmp(sc[n + 1], NS_SCREEN_INIT)
&& strcmp(sc[n + 1], NS_SCREEN_PRVS_REG) ? MENUITEM_ECHO : MENUITEM_LITERAL, sc[n + 1]);
menu_add_item(m, i);
}
}
if ((i = menuitem_create("About..."))) {
menuitem_set_action(i, MENUITEM_ALERT, "Screen compatibility layer by Azundris <scream@azundris.com>");
menu_add_item(m, i);
}
if ((button = button_create(NS_MENU_TITLE))) {
if (!(buttonbar = bbar_insert_button(buttonbar, button, -1, TRUE))) {
m->font = NULL;
#ifdef MULTI_CHARSET
m->fontset = NULL;
#endif
menu_delete(m);
button_set_action(button, ACTION_STRING, NS_MENU_TITLE);
button_free(button);
} else {
int j, k = menu_list ? menu_list->nummenus : 0;
menu_list = menulist_add_menu(menu_list, m);
for (j = k; j < menu_list->nummenus; j++) {
event_data_add_mywin(&menu_event_data, menu_list->menus[j]->win);
}
if (!k)
menu_init();
button_set_action(button, ACTION_MENU, NS_MENU_TITLE);
}
}
}
/* add_screen_ctl_button(&buttonbar,"New",'c'); */
return TermWin.screen->fd;
}
return -1;
}
#endif
/* init_command() */
void
init_command(char **argv)
{
int (*command_func) (char **);
/* Use init function appropriate for how we were compiled. */
#ifdef ESCREEN
command_func = escreen_init;
#else
command_func = run_command;
#endif
/* Initialize the command connection. This should be called after
the X server connection is established. */
/* Enable delete window protocol */
XSetWMProtocols(Xdisplay, TermWin.parent, &(props[PROP_DELETE_WINDOW]), 1);
init_locale();
#ifdef META8_OPTION
meta_char = (Options & Opt_meta8 ? 0x80 : 033);
#endif
#ifdef GREEK_SUPPORT
greek_init();
#endif
Xfd = XConnectionNumber(Xdisplay);
D_CMD(("Xfd = %d\n", Xfd));
cmdbuf_ptr = cmdbuf_endp = cmdbuf_base;
AT_LEAST((int) num_fds, Xfd + 1);
if (pipe_fd >= 0) {
AT_LEAST((int) num_fds, pipe_fd + 1);
}
if ((cmd_fd = command_func(argv)) < 0) {
print_error("aborting\n");
exit(EXIT_FAILURE);
}
}
/* window resizing */
/*
* Tell the teletype handler what size the window is.
* Called after a window size change.
*/
void
tt_winsize(int fd)
{
struct winsize ws;
if (fd < 0)
return;
MEMSET(&ws, 0, sizeof(struct winsize));
ws.ws_row = (unsigned short) TermWin.nrow;
ws.ws_col = (unsigned short) TermWin.ncol;
#ifndef __CYGWIN32__
ws.ws_xpixel = (unsigned short) TermWin.width;
ws.ws_ypixel = (unsigned short) TermWin.height;
#endif
D_CMD(("%hdx%hd (%hdx%hd)\n", ws.ws_row, ws.ws_col, ws.ws_xpixel, ws.ws_ypixel));
ioctl(fd, TIOCSWINSZ, &ws);
}
void
tt_resize(void)
{
tt_winsize(cmd_fd);
}
/* attempt to `write' COUNT to the input buffer */
unsigned int
cmd_write(const unsigned char *str, unsigned int count)
{
int n;
n = (count - (cmdbuf_ptr - cmdbuf_base));
/* need to insert more chars that space available in the front */
if (n > 0) {
/* try and get more space from the end */
unsigned char *src, *dst;
dst = (cmdbuf_base + sizeof(cmdbuf_base) - 1); /* max pointer */
if ((cmdbuf_ptr + n) > dst)
n = (dst - cmdbuf_ptr); /* max # chars to insert */
if ((cmdbuf_endp + n) > dst)
cmdbuf_endp = (dst - n); /* truncate end if needed */
/* equiv: memmove ((cmdbuf_ptr+n), cmdbuf_ptr, n); */
src = cmdbuf_endp;
dst = src + n;
/* FIXME: anything special to avoid possible pointer wrap? */
while (src >= cmdbuf_ptr)
*dst-- = *src--;
/* done */
cmdbuf_ptr += n;
cmdbuf_endp += n;
}
while (count-- && cmdbuf_ptr > cmdbuf_base) {
/* sneak one in */
cmdbuf_ptr--;
*cmdbuf_ptr = str[count];
}
return (0);
}
#ifdef BACKGROUND_CYCLING_SUPPORT
RETSIGTYPE
check_pixmap_change(int sig)
{
static time_t last_update = 0;
time_t now;
static unsigned long image_idx = 0;
void (*old_handler) (int);
static unsigned char in_cpc = 0;
if (in_cpc)
SIG_RETURN(0);
in_cpc = 1;
D_PIXMAP(("check_pixmap_change(%d): rs_anim_delay == %lu seconds, last_update == %lu\n", sig, rs_anim_delay, last_update));
if (!rs_anim_delay)
SIG_RETURN(0);
if (last_update == 0) {
last_update = time(NULL);
old_handler = signal(SIGALRM, check_pixmap_change);
alarm(rs_anim_delay);
in_cpc = 0;
SIG_RETURN(0);
}
now = time(NULL);
D_PIXMAP(("now %lu >= %lu (last_update %lu + rs_anim_delay %lu) ?\n", now, last_update + rs_anim_delay, last_update, rs_anim_delay));
if (now >= last_update + rs_anim_delay || 1) {
D_PIXMAP(("Time to update pixmap. now == %lu\n", now));
imlib_context_set_image(images[image_bg].current->iml->im);
imlib_free_image_and_decache();
images[image_bg].current->iml->im = NULL;
xterm_seq(XTerm_Pixmap, rs_anim_pixmaps[image_idx++]);
last_update = now;
old_handler = signal(SIGALRM, check_pixmap_change);
alarm(rs_anim_delay);
if (rs_anim_pixmaps[image_idx] == NULL) {
image_idx = 0;
}
}
in_cpc = 0;
if (old_handler) {
SIG_RETURN((*old_handler) (sig));
} else {
SIG_RETURN(sig);
}
}
#endif /* BACKGROUND_CYCLING_SUPPORT */
/* cmd_getc() - Return next input character */
/*
* Return the next input character after first passing any keyboard input
* to the command.
*/
unsigned char
cmd_getc(void)
{
#define TIMEOUT_USEC 2500
static short refreshed = 0;
fd_set readfds;
int retval;
struct timeval value, *delay;
/* If there has been a lot of new lines, then update the screen
* What the heck I'll cheat and only refresh less than every page-full.
* the number of pages between refreshes is refresh_limit, which
* is incremented here because we must be doing flat-out scrolling.
*
* refreshing should be correct for small scrolls, because of the
* time-out
*/
if (refresh_count >= (refresh_limit * (TermWin.nrow - 1))) {
D_CMD(("Refresh count %d >= limit %d * rows. (Refresh period %d.)\n", refresh_count, refresh_limit, REFRESH_PERIOD));
if (refresh_limit < REFRESH_PERIOD)
refresh_limit++;
refresh_count = 0;
refreshed = 1;
#ifdef PROFILE
P_CALL(scr_refresh(refresh_type), "cmd_getc()->scr_refresh()");
#else
scr_refresh(refresh_type);
#endif
}
#ifdef ESCREEN
if (TermWin.screen) {
switch (TermWin.screen->backend) {
case NS_MODE_NONE:
break;
case NS_MODE_NEGOTIATE:
# ifdef NS_HAVE_SCREEN
case NS_MODE_SCREEN:
parse_screen_status_if_necessary();
break;
# endif
# ifdef NS_HAVE_SCREAM
case NS_MODE_SCREAM:
break;
# endif
default:
D_ESCREEN(("mode %d not supported...\n", TermWin.screen->backend));
TermWin.screen->backend = NS_MODE_NONE;
TermWin.screen_mode = NS_MODE_NONE;
}
}
#endif
/* characters already read in */
if (CHARS_READ()) {
RETURN_CHAR();
}
for (;;) {
v_doPending();
while (XPending(Xdisplay)) { /* process pending X events */
XEvent ev;
refreshed = 0;
XNextEvent(Xdisplay, &ev);
#ifdef USE_XIM
if (xim_input_context != NULL) {
if (!XFilterEvent(&ev, ev.xkey.window)) {
event_dispatch(&ev);
}
} else
#endif
event_dispatch(&ev);
/* in case button actions pushed chars to cmdbuf */
if (CHARS_READ()) {
RETURN_CHAR();
}
}
if (paused == 1 && cmd_fd == -1) {
const char *done = " -- Task Finished, ESC to exit";
append_to_title(rs_finished_title ? rs_finished_title : done);
append_to_icon_name(rs_finished_title ? rs_finished_title : done);
paused++;
if (rs_finished_text) {
cmd_write((unsigned char *) rs_finished_text, strlen(rs_finished_text));
}
}
#ifdef SCROLLBAR_BUTTON_CONTINUAL_SCROLLING
if (scrollbar_uparrow_is_pressed()) {
if (!scroll_arrow_delay-- && scr_page(UP, 1)) {
scroll_arrow_delay = SCROLLBAR_CONTINUOUS_DELAY;
refreshed = 0;
}
} else if (scrollbar_downarrow_is_pressed()) {
if (!scroll_arrow_delay-- && scr_page(DN, 1)) {
scroll_arrow_delay = SCROLLBAR_CONTINUOUS_DELAY;
refreshed = 0;
}
}
#endif /* SCROLLBAR_BUTTON_CONTINUAL_SCROLLING */
/* Nothing to do! */
FD_ZERO(&readfds);
if (cmd_fd >= 0) {
FD_SET(cmd_fd, &readfds);
}
FD_SET(Xfd, &readfds);
if (pipe_fd >= 0) {
FD_SET(pipe_fd, &readfds);
}
value.tv_usec = TIMEOUT_USEC;
value.tv_sec = 0;
if (refreshed
#ifdef SCROLLBAR_BUTTON_CONTINUAL_SCROLLING
&& !(scrollbar_arrow_is_pressed())
#endif
) {
delay = NULL;
} else {
delay = &value;
}
retval = select(num_fds, &readfds, NULL, NULL, delay);
if (retval < 0) {
if (cmd_fd >= 0 && FD_ISSET(cmd_fd, &readfds)) {
print_error("Error reading from tty -- %s\n", strerror(errno));
cmd_fd = -1;
}
if (pipe_fd >= 0 && FD_ISSET(pipe_fd, &readfds)) {
print_error("Error reading from pipe -- %s\n", strerror(errno));
pipe_fd = -1;
}
if (pipe_fd < 0 && cmd_fd < 0 && !paused) {
exit(errno);
}
} else if (retval == 0) {
refresh_count = 0;
refresh_limit = 1;
if (!refreshed) {
refreshed = 1;
D_CMD(("select() timed out, time to update the screen.\n"));
scr_refresh(refresh_type);
if (scrollbar_is_visible()) {
scrollbar_anchor_update_position(1);
}
#ifdef USE_XIM
xim_send_spot();
#endif
}
} else {
/* We have something to read from. */
if (cmd_fd >= 0 && FD_ISSET(cmd_fd, &readfds)) {
/* See if we can read from the application */
register unsigned int count = CMD_BUF_SIZE;
cmdbuf_ptr = cmdbuf_endp = cmdbuf_base;
while (count) {
register int n = read(cmd_fd, cmdbuf_endp, count);
if (n <= 0) {
if (paused) {
cmd_fd = -1;
}
break;
}
cmdbuf_endp += n;
count -= n;
}
/* some characters read in */
if (CHARS_BUFFERED()) {
RETURN_CHAR();
}
}
if (pipe_fd >= 0 && FD_ISSET(pipe_fd, &readfds)) {
register unsigned int count = CMD_BUF_SIZE / 2;
cmdbuf_ptr = cmdbuf_endp = cmdbuf_base;
while (count) {
register int n = read(pipe_fd, cmdbuf_endp, count);
if (n <= 0)
break;
n = add_carriage_returns(cmdbuf_endp, n);
cmdbuf_endp += n;
count -= n;
}
/* some characters read in */
if (CHARS_BUFFERED()) {
RETURN_CHAR();
}
}
}
}
return (0);
}
/* Put a character back in the buffer. Only use this once at a time. */
void
cmd_ungetc(void)
{
cmdbuf_ptr--;
}
/* tt_write(), tt_printf() - output to command */
/*
* Send count characters directly to the command
*/
void
tt_write(const unsigned char *buf, unsigned int count)
{
v_writeBig(cmd_fd, (char *) buf, count);
#if 0 /* Fixes the bug that hung Eterm when pasting a lot of stuff */
while (count > 0) {
int n = write(cmd_fd, buf, count);
if (n > 0) {
count -= n;
buf += n;
}
}
#endif
}
/*
* Send printf() formatted output to the command.
* Only use for small ammounts of data.
*/
void
tt_printf(const unsigned char *fmt, ...)
{
static unsigned char buf[256];
va_list arg_ptr;
va_start(arg_ptr, fmt);
vsnprintf((char *) buf, sizeof(buf), (char *) fmt, arg_ptr);
va_end(arg_ptr);
tt_write(buf, strlen((char *) buf));
}
/* Read and process output from the application */
void
main_loop(void)
{
/* int ch; */
register int ch;
D_CMD(("PID %d\n", getpid()));
D_CMD(("Command buffer base == %8p, length %lu, end at %8p\n", cmdbuf_base, CMD_BUF_SIZE, cmdbuf_base + CMD_BUF_SIZE - 1));
#ifdef BACKGROUND_CYCLING_SUPPORT
if (rs_anim_delay) {
check_pixmap_change(0);
}
#endif
do {
while ((ch = cmd_getc()) == 0); /* wait for something */
if (ch >= ' ' || ch == '\t' || ch == '\n' || ch == '\r') {
/* Read a text string from the input buffer */
int nlines = 0;
/* unsigned char * str; */
register unsigned char *str;
D_CMD(("Command buffer contains %d characters.\n", cmdbuf_endp - cmdbuf_ptr));
D_VT(("\n%s\n\n", safe_print_string(cmdbuf_ptr - 1, cmdbuf_endp - cmdbuf_ptr + 1)));
/*
* point to the start of the string,
* decrement first since already did get_com_char ()
*/
str = --cmdbuf_ptr;
while (cmdbuf_ptr < cmdbuf_endp) {
ch = *cmdbuf_ptr++;
#if DEBUG >= DEBUG_VT
if (DEBUG_LEVEL >= DEBUG_VT) {
if (ch < 32) {
D_VT(("\'%s\' (%d 0x%02x %03o)\n", get_ctrl_char_name(ch), ch, ch, ch));
} else {
D_VT(("\'%c\' (%d 0x%02x %03o)\n", ch, ch, ch, ch));
}
}
#endif
if (ch >= ' ' || ch == '\t' || ch == '\r') {
/* nothing */
} else if (ch == '\n') {
nlines++;
if (++refresh_count >= (refresh_limit * (TermWin.nrow - 1)))
break;
} else { /* unprintable */
cmdbuf_ptr--;
break;
}
}
D_SCREEN(("Adding %d lines (%d chars); str == %8p, cmdbuf_ptr == %8p, cmdbuf_endp == %8p\n", nlines, cmdbuf_ptr - str, str, cmdbuf_ptr, cmdbuf_endp));
scr_add_lines(str, nlines, (cmdbuf_ptr - str));
} else {
switch (ch) {
# ifdef NO_ENQ_ANS
case 005:
break;
# else
case 005: /* ^E (ENQ) terminal status enquiry */
tt_printf(VT100_ANS);
break;
# endif
case 007: /* ^G (BEL) */
scr_bell();
break;
case '\b':
scr_backspace();
break;
case 013: /* ^K (VT) */
case 014: /* ^L (FF) */
scr_index(UP);
break;
case 016: /* ^N (SO) shift out (enter ACS mode) */
scr_charset_choose(1);
break;
case 017: /* ^O (SI) shift in (leave ACS mode) */
scr_charset_choose(0);
break;
case 033:
process_escape_seq();
break;
}
}
} while (ch != EOF);
}
/* output a burst of any pending data from a paste... */
int
v_doPending(void)
{
if (v_bufstr >= v_bufptr)
return (0);
v_writeBig(cmd_fd, NULL, 0);
return (1);
}
/* Write data to the pty as typed by the user, pasted with the mouse,
* or generated by us in response to a query ESC sequence.
* Code stolen from xterm
*/
void
v_writeBig(int f, char *d, int len)
{
int written;
int c = len;
if (v_bufstr == NULL && len > 0) {
v_buffer = MALLOC(len);
v_bufstr = v_buffer;
v_bufptr = v_buffer;
v_bufend = v_buffer + len;
}
/*
* Append to the block we already have.
* Always doing this simplifies the code, and
* isn't too bad, either. If this is a short
* block, it isn't too expensive, and if this is
* a long block, we won't be able to write it all
* anyway.
*/
if (len > 0) {
if (v_bufend < v_bufptr + len) { /* we've run out of room */
if (v_bufstr != v_buffer) {
/* there is unused space, move everything down */
/* possibly overlapping bcopy here */
/* bcopy(v_bufstr, v_buffer, v_bufptr - v_bufstr); */
memcpy(v_buffer, v_bufstr, v_bufptr - v_bufstr);
v_bufptr -= v_bufstr - v_buffer;
v_bufstr = v_buffer;
}
if (v_bufend < v_bufptr + len) {
/* still won't fit: get more space */
/* Don't use XtRealloc because an error is not fatal. */
int size = v_bufptr - v_buffer; /* save across realloc */
v_buffer = REALLOC(v_buffer, size + len);
if (v_buffer) {
v_bufstr = v_buffer;
v_bufptr = v_buffer + size;
v_bufend = v_bufptr + len;
} else {
/* no memory: ignore entire write request */
print_error("cannot allocate buffer space\n");
v_buffer = v_bufstr; /* restore clobbered pointer */
c = 0;
}
}
}
if (v_bufend >= v_bufptr + len) { /* new stuff will fit */
memcpy(v_bufptr, d, len); /* bcopy(d, v_bufptr, len); */
v_bufptr += len;
}
}
/*
* Write out as much of the buffer as we can.
* Be careful not to overflow the pty's input silo.
* We are conservative here and only write
* a small amount at a time.
*
* If we can't push all the data into the pty yet, we expect write
* to return a non-negative number less than the length requested
* (if some data written) or -1 and set errno to EAGAIN,
* EWOULDBLOCK, or EINTR (if no data written).
*
* (Not all systems do this, sigh, so the code is actually
* a little more forgiving.)
*/
if (v_bufptr > v_bufstr) {
written = write(f, v_bufstr, v_bufptr - v_bufstr <= MAX_PTY_WRITE ? v_bufptr - v_bufstr : MAX_PTY_WRITE);
if (written < 0) {
written = 0;
}
D_TTY(("Wrote %d characters\n", written));
v_bufstr += written;
if (v_bufstr >= v_bufptr) /* we wrote it all */
v_bufstr = v_bufptr = v_buffer;
}
/*
* If we have lots of unused memory allocated, return it
*/
if (v_bufend - v_bufptr > 1024) { /* arbitrary hysteresis */
/* save pointers across realloc */
int start = v_bufstr - v_buffer;
int size = v_bufptr - v_buffer;
int allocsize = size ? size : 1;
v_buffer = REALLOC(v_buffer, allocsize);
if (v_buffer) {
v_bufstr = v_buffer + start;
v_bufptr = v_buffer + size;
v_bufend = v_buffer + allocsize;
} else {
/* should we print a warning if couldn't return memory? */
v_buffer = v_bufstr - start; /* restore clobbered pointer */
}
}
}
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