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--- ./kdm/ConfigureChecks.cmake.orig 2009-05-27 14:53:40.000000000 -0500
+++ ./kdm/ConfigureChecks.cmake 2010-04-19 15:37:35.000000000 -0500
@@ -37,6 +37,35 @@
}
" HAVE_SETLOGIN)
+check_c_source_runs("
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+int main()
+{
+ int fd, fd2;
+ struct sockaddr_un sa;
+
+ if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
+ return 2;
+ sa.sun_family = AF_UNIX;
+ strcpy(sa.sun_path, \"testsock\");
+ unlink(sa.sun_path);
+ if (bind(fd, (struct sockaddr *)&sa, sizeof(sa)))
+ return 2;
+ chmod(sa.sun_path, 0);
+ setuid(getuid() + 1000);
+ if ((fd2 = socket(PF_UNIX, SOCK_STREAM, 0)) < 0)
+ return 2;
+ connect(fd2, (struct sockaddr *)&sa, sizeof(sa));
+ return errno != EACCES;
+}
+" HONORS_SOCKET_PERMS)
+
# for config-kdm.h
check_function_exists(seteuid HAVE_SETEUID)
--- ./kdm/config-kdm.h.cmake.orig 2009-05-27 14:53:40.000000000 -0500
+++ ./kdm/config-kdm.h.cmake 2010-04-19 15:37:35.000000000 -0500
@@ -129,6 +129,9 @@
/* Define to 1 if the ck-connector library is found */
#cmakedefine HAVE_CKCONNECTOR 1
+/* Define to 1 if OS honors permission bits on socket inodes */
+#cmakedefine HONORS_SOCKET_PERMS 1
+
/* $PATH defaults set by KDM */
#cmakedefine KDM_DEF_USER_PATH "${KDM_DEF_USER_PATH}"
#cmakedefine KDM_DEF_SYSTEM_PATH "${KDM_DEF_SYSTEM_PATH}"
--- ./kdm/backend/dm.h.orig 2008-11-19 04:18:06.000000000 -0600
+++ ./kdm/backend/dm.h 2010-04-19 15:37:35.000000000 -0500
@@ -232,6 +232,9 @@
struct cmdsock *css; /* open connections */
char *path; /* filename of the socket */
+#ifndef HONORS_SOCKET_PERMS
+ char *realdir; /* real dirname of the socket */
+#endif
int fd; /* fd of the socket */
int gid; /* owner group of the socket */
} CtrlRec;
--- ./kdm/backend/ctrl.c.orig 2009-03-18 04:59:20.000000000 -0500
+++ ./kdm/backend/ctrl.c 2010-04-19 15:42:55.000000000 -0500
@@ -78,7 +78,25 @@
}
+#ifdef HONORS_SOCKET_PERMS
static CtrlRec ctrl = { 0, 0, -1, 0 };
+#else
+static CtrlRec ctrl = { 0, 0, 0, -1, 0 };
+
+static int mkTempDir( char *dir )
+{
+ int i, l = strlen( dir ) - 6;
+
+ for (i = 0; i < 100; i++) {
+ randomStr( dir + l );
+ if (!mkdir( dir, 0700 ))
+ return True;
+ if (errno != EEXIST)
+ break;
+ }
+ return False;
+}
+#endif
void
openCtrl( struct display *d )
@@ -112,22 +130,50 @@
if (strlen( cr->path ) >= sizeof(sa.sun_path))
logError( "path %\"s too long; no control sockets will be available\n",
cr->path );
- else if (mkdir( sockdir, 0755 ) && errno != EEXIST)
+ #ifdef HONORS_SOCKET_PERMS
+ else if (mkdir( sockdir, 0700 ) && errno != EEXIST)
logError( "mkdir %\"s failed; no control sockets will be available\n",
sockdir );
+ else if (unlink( cr->path ) && errno != ENOENT)
+ logError( "unlink %\"s failed: %m; control socket will not be available\n",
+ cr->path );
else {
- if (!d)
- chown( sockdir, -1, fifoGroup );
+ #else
+ else if (unlink( sockdir ) && errno != ENOENT)
+ logError( "unlink %\"s failed: %m; control socket will not be available\n",
+ sockdir );
+ else if (!strApp( &cr->realdir, sockdir, "-XXXXXX", (char *)0))
+ ;
+ else if (!mkTempDir( cr->realdir )) {
+ logError( "mkdir %\"s failed: %m; control socket will not be available\n",
+ cr->realdir );
+ free( cr->realdir );
+ cr->realdir = 0;
+ } else if (symlink( cr->realdir, sockdir )) {
+ logError( "symlink %\"s => %\"s failed: %m; control socket will not be available\n",
+ sockdir, cr->realdir );
+ rmdir( cr->realdir );
+ free( cr->realdir );
+ cr->realdir = 0;
+ } else {
+ chown( sockdir, 0, d ? 0 : fifoGroup );
chmod( sockdir, 0750 );
+ #endif
if ((cr->fd = socket( PF_UNIX, SOCK_STREAM, 0 )) < 0)
logError( "Cannot create control socket\n" );
else {
- unlink( cr->path );
sa.sun_family = AF_UNIX;
strcpy( sa.sun_path, cr->path );
if (!bind( cr->fd, (struct sockaddr *)&sa, sizeof(sa) )) {
if (!listen( cr->fd, 5 )) {
+ #ifdef HONORS_SOCKET_PERMS
+ chmod( cr->path, 0660 );
+ if (!d)
+ chown( cr->path, -1, fifoGroup );
+ chmod( sockdir, 0755 );
+ #else
chmod( cr->path, 0666 );
+ #endif
registerCloseOnFork( cr->fd );
registerInput( cr->fd );
free( sockdir );
@@ -142,6 +188,14 @@
close( cr->fd );
cr->fd = -1;
}
+#ifdef HONORS_SOCKET_PERMS
+ rmdir( sockdir );
+#else
+ unlink( sockdir );
+ rmdir( cr->realdir );
+ free( cr->realdir );
+ cr->realdir = 0;
+#endif
}
free( cr->path );
cr->path = 0;
@@ -162,7 +216,14 @@
cr->fd = -1;
unlink( cr->path );
*strrchr( cr->path, '/' ) = 0;
+#ifdef HONORS_SOCKET_PERMS
rmdir( cr->path );
+#else
+ unlink( cr->path );
+ rmdir( cr->realdir );
+ free( cr->realdir );
+ cr->realdir = 0;
+#endif
free( cr->path );
cr->path = 0;
while (cr->css) {
@@ -176,12 +237,12 @@
void
chownCtrl( CtrlRec *cr, int uid )
{
- if (cr->path) {
- char *ptr = strrchr( cr->path, '/' );
- *ptr = 0;
+ if (cr->path)
+#ifdef HONORS_SOCKET_PERMS
chown( cr->path, uid, -1 );
- *ptr = '/';
- }
+#else
+ chown( cr->realdir, uid, -1 );
+#endif
}
void
|
