Adding upstream version 3:4.8.29.upstream/3%4.8.29upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 1115 insertions, 0 deletions

diff --git a/src/consaver/Makefile.am b/src/consaver/Makefile.am
new file mode 100644
index 0000000..ba446c1
--- /dev/null
+++ b/src/consaver/Makefile.am
@@ -0,0 +1,7 @@
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diff --git a/src/consaver/Makefile.in b/src/consaver/Makefile.in
new file mode 100644
index 0000000..0b23d4f
--- /dev/null
+++ b/src/consaver/Makefile.in
@@ -0,0 +1,776 @@
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+	sed -e 'p;s,.*/,,;n;h' \
+	    -e 's|.*|.|' \
+	    -e 'p;x;s,.*/,,;s/$(EXEEXT)$$//;$(transform);s/$$/$(EXEEXT)/' | \
+	sed 'N;N;N;s,\n, ,g' | \
+	$(AWK) 'BEGIN { files["."] = ""; dirs["."] = 1 } \
+	  { d=$$3; if (dirs[d] != 1) { print "d", d; dirs[d] = 1 } \
+	    if ($$2 == $$4) files[d] = files[d] " " $$1; \
+	    else { print "f", $$3 "/" $$4, $$1; } } \
+	  END { for (d in files) print "f", d, files[d] }' | \
+	while read type dir files; do \
+	    if test "$$dir" = .; then dir=; else dir=/$$dir; fi; \
+	    test -z "$$files" || { \
+	    echo " $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files '$(DESTDIR)$(pkglibexecdir)$$dir'"; \
+	    $(INSTALL_PROGRAM_ENV) $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=install $(INSTALL_PROGRAM) $$files "$(DESTDIR)$(pkglibexecdir)$$dir" || exit $$?; \
+	    } \
+	; done
+
+uninstall-pkglibexecPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	@list='$(pkglibexec_PROGRAMS)'; test -n "$(pkglibexecdir)" || list=; \
+	files=`for p in $$list; do echo "$$p"; done | \
+	  sed -e 'h;s,^.*/,,;s/$(EXEEXT)$$//;$(transform)' \
+	      -e 's/$$/$(EXEEXT)/' \
+	`; \
+	test -n "$$list" || exit 0; \
+	echo " ( cd '$(DESTDIR)$(pkglibexecdir)' && rm -f" $$files ")"; \
+	cd "$(DESTDIR)$(pkglibexecdir)" && rm -f $$files
+
+clean-pkglibexecPROGRAMS:
+	@list='$(pkglibexec_PROGRAMS)'; test -n "$$list" || exit 0; \
+	echo " rm -f" $$list; \
+	rm -f $$list || exit $$?; \
+	test -n "$(EXEEXT)" || exit 0; \
+	list=`for p in $$list; do echo "$$p"; done | sed 's/$(EXEEXT)$$//'`; \
+	echo " rm -f" $$list; \
+	rm -f $$list
+
+cons.saver$(EXEEXT): $(cons_saver_OBJECTS) $(cons_saver_DEPENDENCIES) $(EXTRA_cons_saver_DEPENDENCIES) 
+	@rm -f cons.saver$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(cons_saver_OBJECTS) $(cons_saver_LDADD) $(LIBS)
+
+mostlyclean-compile:
+	-rm -f *.$(OBJEXT)
+
+distclean-compile:
+	-rm -f *.tab.c
+
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cons.saver.Po@am__quote@ # am--include-marker
+
+$(am__depfiles_remade):
+	@$(MKDIR_P) $(@D)
+	@echo '# dummy' >$@-t && $(am__mv) $@-t $@
+
+am--depfiles: $(am__depfiles_remade)
+
+.c.o:
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+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(COMPILE) -c -o $@ $<
+
+.c.obj:
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+.c.lo:
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LTCOMPILE) -c -o $@ $<
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(am__tagged_files)
+	$(am__define_uniq_tagged_files); mkid -fID $$unique
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+	$(am__define_uniq_tagged_files); \
+	shift; \
+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
+	  test -n "$$unique" || unique=$$empty_fix; \
+	  if test $$# -gt 0; then \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      "$$@" $$unique; \
+	  else \
+	    $(ETAGS) $(ETAGSFLAGS) $(AM_ETAGSFLAGS) $(ETAGS_ARGS) \
+	      $$unique; \
+	  fi; \
+	fi
+ctags: ctags-am
+
+CTAGS: ctags
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+	$(am__define_uniq_tagged_files); \
+	test -z "$(CTAGS_ARGS)$$unique" \
+	  || $(CTAGS) $(CTAGSFLAGS) $(AM_CTAGSFLAGS) $(CTAGS_ARGS) \
+	     $$unique
+
+GTAGS:
+	here=`$(am__cd) $(top_builddir) && pwd` \
+	  && $(am__cd) $(top_srcdir) \
+	  && gtags -i $(GTAGS_ARGS) "$$here"
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+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS)
+installdirs:
+	for dir in "$(DESTDIR)$(pkglibexecdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
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+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
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+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-pkglibexecPROGRAMS \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/cons.saver.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
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+html: html-am
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+html-am:
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+info: info-am
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+info-am:
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+install-exec-am: install-pkglibexecPROGRAMS
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+install-ps: install-ps-am
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+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/cons.saver.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-am
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+pdf-am:
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+ps: ps-am
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+uninstall-am: uninstall-pkglibexecPROGRAMS
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+.MAKE: install-am install-strip
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+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-pkglibexecPROGRAMS \
+	cscopelist-am ctags ctags-am distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-pkglibexecPROGRAMS install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-pkglibexecPROGRAMS
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/consaver/cons.saver.c b/src/consaver/cons.saver.c
new file mode 100644
index 0000000..05dbb25
--- /dev/null
+++ b/src/consaver/cons.saver.c
@@ -0,0 +1,286 @@
+/*
+   General purpose Linux console screen save/restore server
+
+   This program should be setuid vcsa and /dev/vcsa* should be
+   owned by the same user too.
+
+   Original idea from Unix Interactive Tools version 3.2b (tty.c)
+   This code requires root privileges.
+   You may want to make the cons.saver setuid root.
+   The code should be safe even if it is setuid but who knows?
+
+   Partly rewritten by Jakub Jelinek <jakub@redhat.com>.
+
+   Copyright (C) 1994-2022
+   Free Software Foundation, Inc.
+
+   This file is part of the Midnight Commander.
+
+   The Midnight Commander is free software: you can redistribute it
+   and/or modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   The Midnight Commander is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* This code does _not_ need to be setuid root. However, it needs
+   read/write access to /dev/vcsa* (which is priviledged
+   operation). You should create user vcsa, make cons.saver setuid
+   user vcsa, and make all vcsa's owned by user vcsa.
+
+   Seeing other peoples consoles is bad thing, but believe me, full
+   root is even worse. */
+
+/** \file cons.saver.c
+ *  \brief Source: general purpose Linux console screen save/restore server
+ *
+ *  This code does _not_ need to be setuid root. However, it needs
+ *  read/write access to /dev/vcsa* (which is priviledged
+ *  operation). You should create user vcsa, make cons.saver setuid
+ *  user vcsa, and make all vcsa's owned by user vcsa.
+ *  Seeing other peoples consoles is bad thing, but believe me, full
+ *  root is even worse.
+ */
+
+#include <config.h>
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <termios.h>
+
+#include "lib/unixcompat.h"     /* STDERR_FILENO */
+
+#define LINUX_CONS_SAVER_C
+#include "cons.saver.h"
+
+/*** global variables ****************************************************************************/
+
+/*** file scope macro definitions ****************************************************************/
+
+/*** file scope type declarations ****************************************************************/
+
+/*** file scope variables ************************************************************************/
+
+/*** file scope functions ************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+static void
+send_contents (char *buffer, unsigned int columns, unsigned int rows)
+{
+    unsigned char begin_line = 0, end_line = 0;
+    unsigned int lastline, lc_index, x;
+    unsigned char message, outbuf[1024], *p;
+    unsigned short bytes;
+
+    lc_index = 2 * rows * columns;
+    for (lastline = rows; lastline > 0; lastline--)
+        for (x = 0; x < columns; x++)
+        {
+            lc_index -= 2;
+            if (buffer[lc_index] != ' ')
+                goto out;
+        }
+  out:
+
+    message = CONSOLE_CONTENTS;
+    if (write (1, &message, 1) != 1)
+        return;
+    if (read (0, &begin_line, 1) != 1)
+        return;
+    if (read (0, &end_line, 1) != 1)
+        return;
+    if (begin_line > lastline)
+        begin_line = lastline;
+    if (end_line > lastline)
+        end_line = lastline;
+
+    lc_index = (end_line - begin_line) * columns;
+    bytes = lc_index;
+
+    if (write (1, &bytes, 2) != 2)
+        return;
+    if (bytes == 0)
+        return;
+
+    p = outbuf;
+    for (lc_index = 2 * begin_line * columns; lc_index < 2 * end_line * columns; lc_index += 2)
+    {
+        *p++ = buffer[lc_index];
+        if (p == outbuf + sizeof (outbuf))
+        {
+            if (write (1, outbuf, sizeof (outbuf)) != sizeof (outbuf))
+                return;
+            p = outbuf;
+        }
+    }
+
+    if (p != outbuf)
+        if (write (1, outbuf, p - outbuf) < (p - outbuf))
+            return;
+}
+
+/* --------------------------------------------------------------------------------------------- */
+
+static void __attribute__ ((noreturn)) die (void)
+{
+    unsigned char zero = 0;
+    ssize_t ret;
+    ret = write (1, &zero, 1);
+    (void) ret;
+    exit (3);
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/*** public functions ****************************************************************************/
+/* --------------------------------------------------------------------------------------------- */
+
+int
+main (int argc, char **argv)
+{
+    unsigned char action = 0, console_flag = 3;
+    int console_fd, vcsa_fd, console_minor, buffer_size;
+    struct stat st;
+    uid_t uid, euid;
+    char *buffer, *tty_name, console_name[16], vcsa_name[16];
+    const char *p, *q;
+    struct winsize winsz;
+
+    close (STDERR_FILENO);
+
+    if (argc != 2)
+        die ();
+
+    tty_name = argv[1];
+    if (strnlen (tty_name, 15) == 15 || strncmp (tty_name, "/dev/", 5))
+        die ();
+
+    setsid ();
+    uid = getuid ();
+    euid = geteuid ();
+
+    if (seteuid (uid) < 0)
+        die ();
+    console_fd = open (tty_name, O_RDONLY);
+    if (console_fd < 0)
+        die ();
+    if (fstat (console_fd, &st) < 0 || !S_ISCHR (st.st_mode))
+        die ();
+#ifdef HAVE_STRUCT_STAT_ST_RDEV
+    if ((st.st_rdev & 0xff00) != 0x0400)
+        die ();
+    console_minor = (int) (st.st_rdev & 0x00ff);
+#else
+    console_minor = 1;          /* FIXME */
+#endif
+    if (console_minor < 1 || console_minor > 63)
+        die ();
+    if (st.st_uid != uid)
+        die ();
+
+    switch (tty_name[5])
+    {
+        /* devfs */
+    case 'v':
+        p = "/dev/vc/%d";
+        q = "/dev/vcc/a%d";
+        break;
+        /* /dev/ttyN */
+    case 't':
+        p = "/dev/tty%d";
+        q = "/dev/vcsa%d";
+        break;
+    default:
+        die ();
+    }
+
+    snprintf (console_name, sizeof (console_name), p, console_minor);
+    if (strncmp (console_name, tty_name, sizeof (console_name)) != 0)
+        die ();
+
+    if (seteuid (euid) < 0)
+        die ();
+
+    snprintf (vcsa_name, sizeof (vcsa_name), q, console_minor);
+    vcsa_fd = open (vcsa_name, O_RDWR);
+    if (vcsa_fd < 0)
+        die ();
+    if (fstat (vcsa_fd, &st) < 0 || !S_ISCHR (st.st_mode))
+        die ();
+
+    if (seteuid (uid) < 0)
+        die ();
+
+    winsz.ws_col = winsz.ws_row = 0;
+    if (ioctl (console_fd, TIOCGWINSZ, &winsz) < 0
+        || winsz.ws_col <= 0 || winsz.ws_row <= 0 || winsz.ws_col >= 256 || winsz.ws_row >= 256)
+        die ();
+
+    buffer_size = 4 + 2 * winsz.ws_col * winsz.ws_row;
+    buffer = calloc (buffer_size, 1);
+    if (buffer == NULL)
+        die ();
+
+    if (write (1, &console_flag, 1) != 1)
+        die ();
+
+    while (console_flag && read (0, &action, 1) == 1)
+    {
+        switch (action)
+        {
+        case CONSOLE_DONE:
+            console_flag = 0;
+            continue;
+        case CONSOLE_SAVE:
+            if (seteuid (euid) < 0
+                || lseek (vcsa_fd, 0, 0) != 0
+                || fstat (console_fd, &st) < 0 || st.st_uid != uid
+                || read (vcsa_fd, buffer, buffer_size) != buffer_size
+                || fstat (console_fd, &st) < 0 || st.st_uid != uid)
+                memset (buffer, 0, buffer_size);
+            if (seteuid (uid) < 0)
+                die ();
+            break;
+        case CONSOLE_RESTORE:
+            if (seteuid (euid) >= 0
+                && lseek (vcsa_fd, 0, 0) == 0 && fstat (console_fd, &st) >= 0 && st.st_uid == uid)
+                if (write (vcsa_fd, buffer, buffer_size) != buffer_size)
+                    die ();
+            if (seteuid (uid) < 0)
+                die ();
+            break;
+        case CONSOLE_CONTENTS:
+            send_contents (buffer + 4, winsz.ws_col, winsz.ws_row);
+            break;
+        default:
+            break;
+        }
+
+        if (write (1, &console_flag, 1) != 1)
+            die ();
+    }
+
+    exit (0);
+}
+
+/* --------------------------------------------------------------------------------------------- */
diff --git a/src/consaver/cons.saver.h b/src/consaver/cons.saver.h
new file mode 100644
index 0000000..56319ad
--- /dev/null
+++ b/src/consaver/cons.saver.h
@@ -0,0 +1,46 @@
+/** \file cons.saver.h
+ *  \brief Header: general purpose Linux console screen save/restore server
+ *
+ *  This code does _not_ need to be setuid root. However, it needs
+ *  read/write access to /dev/vcsa* (which is priviledged
+ *  operation). You should create user vcsa, make cons.saver setuid
+ *  user vcsa, and make all vcsa's owned by user vcsa.
+ *  Seeing other peoples consoles is bad thing, but believe me, full
+ *  root is even worse.
+ */
+
+#ifndef MC__CONS_SAVER_H
+#define MC__CONS_SAVER_H
+
+/*** typedefs(not structures) and defined constants **********************************************/
+
+/*** enums ***************************************************************************************/
+
+typedef enum
+{
+    CONSOLE_INIT = '1',
+    CONSOLE_DONE,
+    CONSOLE_SAVE,
+    CONSOLE_RESTORE,
+    CONSOLE_CONTENTS
+} console_action_t;
+
+/*** structures declarations (and typedefs of structures)*****************************************/
+
+/*** global variables defined in .c file *********************************************************/
+
+#ifndef LINUX_CONS_SAVER_C
+/* Used only in mc, not in cons.saver */
+extern int cons_saver_pid;
+#endif /* !LINUX_CONS_SAVER_C */
+
+/*** declarations of public functions ************************************************************/
+
+#ifndef LINUX_CONS_SAVER_C
+/* Used only in mc, not in cons.saver */
+void show_console_contents (int starty, unsigned char begin_line, unsigned char end_line);
+void handle_console (console_action_t action);
+#endif /* !LINUX_CONS_SAVER_C */
+
+/*** inline functions ****************************************************************************/
+#endif /* MC__CONS_SAVER_H */