diff -up smartmontools-5.39/configure.in.lowcap smartmontools-5.39/configure.in
--- smartmontools-5.39/configure.in.lowcap 2009-11-19 10:54:53.000000000 +0100
+++ smartmontools-5.39/configure.in 2009-11-19 11:20:54.645701384 +0100
@@ -219,6 +219,40 @@ if test "$with_selinux" = "yes"; then
AC_DEFINE(WITH_SELINUX, [1], [Define to 1 if SELinux support is enabled])
fi
+ AC_ARG_WITH(libcap-ng,
+ [ --with-libcap-ng=[auto/yes/no] Add Libcap-ng support [default=auto]],,
+ with_libcap_ng=auto)
+
+# Check for Libcap-ng API
+#
+# libcap-ng detection
+
+if test x$with_libcap_ng = xno ; then
+ have_libcap_ng=no;
+else
+ # Start by checking for header file
+ AC_CHECK_HEADER(cap-ng.h, capng_headers=yes, capng_headers=no)
+
+ # See if we have libcap-ng library
+ AC_CHECK_LIB(cap-ng, capng_clear, CAPNG_LDADD=-lcap-ng,)
+
+ # Check results are usable
+ if test x$with_libcap_ng = xyes -a x$CAPNG_LDADD = x ; then
+ AC_MSG_ERROR(libcap-ng support was requested and the library was not found)
+ fi
+ if test x$CAPNG_LDADD != x -a $capng_headers = no ; then
+ AC_MSG_ERROR(libcap-ng libraries found but headers are missing)
+ fi
+fi
+AC_SUBST(CAPNG_LDADD)
+AC_MSG_CHECKING(whether to use libcap-ng)
+if test x$CAPNG_LDADD != x ; then
+ AC_DEFINE(HAVE_LIBCAP_NG,1,[libcap-ng support])
+ AC_MSG_RESULT(yes)
+else
+ AC_MSG_RESULT(no)
+fi
+
if test "$prefix" = "NONE"; then
dnl no prefix and no mandir, so use ${prefix}/share/man as default
if test "$mandir" = '${prefix}/man'; then
diff -up smartmontools-5.39/Makefile.am.lowcap smartmontools-5.39/Makefile.am
--- smartmontools-5.39/Makefile.am.lowcap 2009-11-19 10:54:53.000000000 +0100
+++ smartmontools-5.39/Makefile.am 2009-11-19 11:20:54.646634706 +0100
@@ -45,7 +45,7 @@ smartd_SOURCES = smartd.cpp \
utility.cpp \
utility.h
-smartd_LDADD = @os_deps@ @os_libs@
+smartd_LDADD = @os_deps@ @os_libs@ @CAPNG_LDADD@
smartd_DEPENDENCIES = @os_deps@
EXTRA_smartd_SOURCES = os_darwin.cpp \
diff -up smartmontools-5.39/smartd.8.in.lowcap smartmontools-5.39/smartd.8.in
--- smartmontools-5.39/smartd.8.in.lowcap 2009-11-19 10:54:53.000000000 +0100
+++ smartmontools-5.39/smartd.8.in 2009-11-19 11:20:54.651596342 +0100
@@ -175,6 +175,12 @@ input. This is useful for commands like:
to perform quick and simple checks without a configuration file.
.TP
+.B \-C, \-\-capabilities
+Use possix \fBcapabilities(7)\fP (EXPERIMENTAL).
+
+Warning: Mail notification does not work when used.
+
+.TP
.B \-d, \-\-debug
Runs \fBsmartd\fP in "debug" mode. In this mode, it displays status
information to STDOUT rather than logging it to SYSLOG and does not
diff -up smartmontools-5.39/smartd.cpp.lowcap smartmontools-5.39/smartd.cpp
--- smartmontools-5.39/smartd.cpp.lowcap 2009-11-19 10:54:53.000000000 +0100
+++ smartmontools-5.39/smartd.cpp 2009-11-19 11:36:07.123632685 +0100
@@ -77,6 +77,10 @@ extern "C" int __stdcall FreeConsole(voi
#include <io.h> // setmode()
#endif // __CYGWIN__
+#ifdef HAVE_LIBCAP_NG
+#include <cap-ng.h>
+#endif //LIBCAP_NG
+
// locally included files
#include "int64.h"
#include "atacmds.h"
@@ -190,6 +194,11 @@ static int facility=LOG_DAEMON;
static bool do_fork=true;
#endif
+#ifdef HAVE_LIBCAP_NG
+// enable possix capabilities
+static bool enable_capabilities=false;
+#endif
+
// used for control of printing, passing arguments to atacmds.c
smartmonctrl *con=NULL;
@@ -875,8 +884,7 @@ static void MailWarning(const dev_config
const char *unknown="[Unknown]";
// See if user wants us to send mail
- if (cfg.emailaddress.empty() && cfg.emailcmdline.empty())
- return;
+
std::string address = cfg.emailaddress;
const char * executable = cfg.emailcmdline.c_str();
@@ -917,6 +925,15 @@ static void MailWarning(const dev_config
if (epoch<(mail->lastsent+days))
return;
}
+
+#ifdef HAVE_LIBCAP_NG
+ if (enable_capabilities) {
+ PrintOut(LOG_ERR,"Sending a mail was supressed. "
+ "Mails can't be send when capabilites are enabled\n");
+ return;
+ }
+
+#endif
// record the time of this mail message, and the first mail message
if (!mail->logged)
@@ -1464,6 +1481,11 @@ void Usage (void){
PrintOut(LOG_INFO,"\n");
PrintOut(LOG_INFO," -c NAME|-, --configfile=NAME|-\n");
PrintOut(LOG_INFO," Read configuration file NAME or stdin [default is %s]\n\n", configfile);
+#ifdef HAVE_LIBCAP_NG
+ PrintOut(LOG_INFO," -C, --capabilities\n");
+ PrintOut(LOG_INFO," Use possix capabilities (EXPERIMENTAL).\n"
+ " Warning: Mail notification does not work when used.\n\n");
+#endif
PrintOut(LOG_INFO," -d, --debug\n");
PrintOut(LOG_INFO," Start smartd in debug mode\n\n");
PrintOut(LOG_INFO," -D, --showdirectives\n");
@@ -3701,7 +3723,7 @@ void ParseOpts(int argc, char **argv){
char *tailptr;
long lchecktime;
// Please update GetValidArgList() if you edit shortopts
- const char *shortopts = "c:l:q:dDni:p:r:s:A:B:Vh?";
+ const char *shortopts = "c:l:q:dDni:p:r:s:A:B:VCh?";
char *arg;
// Please update GetValidArgList() if you edit longopts
struct option longopts[] = {
@@ -3727,6 +3749,9 @@ void ParseOpts(int argc, char **argv){
{ "copyright", no_argument, 0, 'V' },
{ "help", no_argument, 0, 'h' },
{ "usage", no_argument, 0, 'h' },
+#ifdef HAVE_LIBCAP_NG
+ { "capabilities", no_argument, 0, 'C' },
+#endif
{ 0, 0, 0, 0 }
};
@@ -3885,6 +3910,12 @@ void ParseOpts(int argc, char **argv){
PrintOut(LOG_INFO, "%s", format_version_info("smartd", true /*full*/).c_str());
EXIT(0);
break;
+#ifdef HAVE_LIBCAP_NG
+ case 'C':
+ //enable possix capabilities
+ enable_capabilities=1;
+ break;
+#endif
case 'h':
// help: print summary of command-line options
debugmode=1;
@@ -4224,6 +4255,16 @@ int main_worker(int argc, char **argv)
bool write_states_always = true;
+#ifdef HAVE_LIBCAP_NG
+ // Drop capabilities
+ if (enable_capabilities) {
+ capng_clear(CAPNG_SELECT_BOTH);
+ capng_updatev(CAPNG_ADD, (capng_type_t)(CAPNG_EFFECTIVE|CAPNG_PERMITTED),
+ CAP_SYS_ADMIN, CAP_MKNOD, CAP_SYS_RAWIO, -1);
+ capng_apply(CAPNG_SELECT_BOTH);
+ }
+#endif
+
// the main loop of the code
for (;;) {
@@ -4318,7 +4359,18 @@ int main_worker(int argc, char **argv)
PrintTestSchedule(configs, states, devices);
EXIT(0);
}
-
+
+#ifdef HAVE_LIBCAP_NG
+ if (enable_capabilities) {
+ for (unsigned i = 0; i < configs.size(); i++) {
+ if (configs.at(i).emailaddress.empty()) {
+ PrintOut(LOG_WARNING,"Mail can't be enabled together with --capabilities. All mail will be suppressed.\n");
+ break;
+ }
+ }
+ }
+#endif
+
// reset signal
caughtsigHUP=0;