From c751e32ec7e47d8c5374ea49708ee2279e6fb514 Mon Sep 17 00:00:00 2001
From: Stefan Berger <stefanb@us.ibm.com>
Date: Sat, 14 Jan 2017 21:57:54 -0500
Subject: [PATCH] Only compile vTPM proxy support if available on platform

Support for vTPM proxy is only available on Linux.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
---
 configure.ac              |  9 +++++++++
 src/swtpm/swtpm_chardev.c | 14 ++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/configure.ac b/configure.ac
index c4a9c6df..ae21f042 100644
--- a/configure.ac
+++ b/configure.ac
@@ -434,6 +434,14 @@ if test "$libtpms_cryptolib" != "$cryptolib"; then
   fi
 fi
 
+with_vtpm_proxy=no
+case $host_os in
+linux-gnu)
+  with_vtpm_proxy=yes
+  AC_DEFINE_UNQUOTED([WITH_VTPM_PROXY], 1,
+                     [whether to build in vTPM proxy support (Linux only)])
+esac
+
 case $host_os in
 cygwin)
   CFLAGS="$CFLAGS -D__USE_LINUX_IOCTL_DEFS"
@@ -470,6 +478,7 @@ printf "with_selinux    : %5s  (no = SELinux policy extenions will NOT be built)
 printf "with_cuse       : %5s  (no = no CUSE interface)\n" $with_cuse
 printf "with_chardev    : %5s  (no = no chardev interface)\n" $with_chardev
 printf "with_swtpm_setup: %5s  (no = swtpm_setup will NOT be built)\n" $with_swtpm_setup
+printf "with_vtpm_proxy : %5s  (no = no vtpm proxy support; Linux only)\n" $with_vtpm_proxy
 echo
 echo "cryptolib: $cryptolib"
 echo
diff --git a/src/swtpm/swtpm_chardev.c b/src/swtpm/swtpm_chardev.c
index 1b5174a0..82c2353a 100644
--- a/src/swtpm/swtpm_chardev.c
+++ b/src/swtpm/swtpm_chardev.c
@@ -65,7 +65,9 @@
 #include "utils.h"
 #include "ctrlchannel.h"
 #include "mainloop.h"
+#ifdef WITH_VTPM_PROXY
 #include "vtpm_proxy.h"
+#endif
 
 /* local variables */
 static int notify_fd[2] = {-1, -1};
@@ -90,6 +92,7 @@ static void sigterm_handler(int sig __attribute__((unused)))
     mainloop_terminate = true;
 }
 
+#ifdef WITH_VTPM_PROXY
 static int create_vtpm_proxy(struct vtpm_proxy_new_dev *vtpm_new_dev)
 {
     int fd, n, ret = 0;
@@ -110,6 +113,7 @@ static int create_vtpm_proxy(struct vtpm_proxy_new_dev *vtpm_new_dev)
 
     return ret;
 }
+#endif
 
 static void usage(FILE *file, const char *prgname, const char *iface)
 {
@@ -147,7 +151,9 @@ static void usage(FILE *file, const char *prgname, const char *iface)
     "                   into; the TPM_PATH environment variable can be used\n"
     "                   instead\n"
     "-r|--runas <user>: change to the given user\n"
+#ifdef WITH_VTPM_PROXY
     "--vtpm-proxy     : spawn a Linux vTPM proxy driver device and read TPM\n"
+#endif
     "                   command from its anonymous file descriptor\n"
     "-h|--help        : display this help screen and terminate\n"
     "\n",
@@ -172,7 +178,9 @@ int swtpm_chardev_main(int argc, char **argv, const char *prgname, const char *i
     char *tpmstatedata = NULL;
     char *ctrlchdata = NULL;
     char *runas = NULL;
+#ifdef WITH_VTPM_PROXY
     bool use_vtpm_proxy = false;
+#endif
 #ifdef DEBUG
     time_t              start_time;
 #endif
@@ -187,7 +195,9 @@ int swtpm_chardev_main(int argc, char **argv, const char *prgname, const char *i
         {"pid"       , required_argument, 0, 'P'},
         {"tpmstate"  , required_argument, 0, 's'},
         {"ctrl"      , required_argument, 0, 'C'},
+#ifdef WITH_VTPM_PROXY
         {"vtpm-proxy",       no_argument, 0, 'v'},
+#endif
         {NULL        , 0                , 0, 0  },
     };
 
@@ -277,9 +287,11 @@ int swtpm_chardev_main(int argc, char **argv, const char *prgname, const char *i
             runas = optarg;
             break;
 
+#ifdef WITH_VTPM_PROXY
         case 'v':
             use_vtpm_proxy = true;
             break;
+#endif
 
         default:
             usage(stderr, prgname, iface);
@@ -287,6 +299,7 @@ int swtpm_chardev_main(int argc, char **argv, const char *prgname, const char *i
         }
     }
 
+#ifdef WITH_VTPM_PROXY
     if (use_vtpm_proxy) {
         struct vtpm_proxy_new_dev vtpm_new_dev = {
             .flags = 0,
@@ -308,6 +321,7 @@ int swtpm_chardev_main(int argc, char **argv, const char *prgname, const char *i
                 vtpm_new_dev.tpm_num,
                 vtpm_new_dev.major, vtpm_new_dev.minor);
     }
+#endif
 
     if (mlp.fd < 0) {
         logprintf(STDERR_FILENO, "Error: Missing character device or file descriptor\n");