X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=daemon%2Fguestfsd.c;h=070684de81802926628d73a3496337ad441efbce;hb=ab7f296b63280d183b6574c896cab6d6cafb660a;hp=5265ab5235e2344d4bec4d3b2746d19c619cd0cc;hpb=27e73269d384814eb5f76468f609f7844cb75b0b;p=libguestfs.git

diff --git a/daemon/guestfsd.c b/daemon/guestfsd.c
index 5265ab5..070684d 100644
--- a/daemon/guestfsd.c
+++ b/daemon/guestfsd.c
@@ -55,9 +55,14 @@
 
 static char *read_cmdline (void);
 
-/* Also in guestfs.c */
-#define GUESTFWD_ADDR "10.0.2.4"
-#define GUESTFWD_PORT "6666"
+/* This is the default address we connect to for very old libraries
+ * which didn't specify the address and port number explicitly on the
+ * kernel command line.  It's now recommended to always specify the
+ * address and port number on the command line, so this will not be
+ * used any more.
+ */
+#define OLD_GUESTFWD_ADDR "10.0.2.4"
+#define OLD_GUESTFWD_PORT "6666"
 
 /* This is only a hint.  If not defined, ignore it. */
 #ifndef AI_ADDRCONFIG
@@ -220,10 +225,14 @@ main (int argc, char *argv[])
   /* Set up a basic environment.  After we are called by /init the
    * environment is essentially empty.
    * https://bugzilla.redhat.com/show_bug.cgi?id=502074#c5
+   *
+   * NOTE: if you change $PATH, you must also change 'prog_exists'
+   * function below.
    */
-  setenv ("PATH", "/usr/bin:/bin", 1);
+  setenv ("PATH", "/sbin:/usr/sbin:/bin:/usr/bin", 1);
   setenv ("SHELL", "/bin/sh", 1);
   setenv ("LC_ALL", "C", 1);
+  setenv ("TERM", "dumb", 1);
 
 #ifndef WIN32
   /* We document that umask defaults to 022 (it should be this anyway). */
@@ -281,7 +290,7 @@ main (int argc, char *argv[])
 
   /* Default vmchannel. */
   if (vmchannel == NULL) {
-    vmchannel = strdup ("tcp:" GUESTFWD_ADDR ":" GUESTFWD_PORT);
+    vmchannel = strdup ("tcp:" OLD_GUESTFWD_ADDR ":" OLD_GUESTFWD_PORT);
     if (!vmchannel) {
       perror ("strdup");
       exit (EXIT_FAILURE);
@@ -1056,6 +1065,25 @@ device_name_translation (char *device, const char *func)
   goto error;
 }
 
+/* Check program exists and is executable on $PATH.  Actually, we
+ * just assume PATH contains the default entries (see main() above).
+ */
+int
+prog_exists (const char *prog)
+{
+  static const char * const dirs[] =
+    { "/sbin", "/usr/sbin", "/bin", "/usr/bin" };
+  size_t i;
+  char buf[1024];
+
+  for (i = 0; i < sizeof dirs / sizeof dirs[0]; ++i) {
+    snprintf (buf, sizeof buf, "%s/%s", dirs[i], prog);
+    if (access (buf, X_OK) == 0)
+      return 1;
+  }
+  return 0;
+}
+
 /* LVM and other commands aren't synchronous, especially when udev is
  * involved.  eg. You can create or remove some device, but the /dev
  * device node won't appear until some time later.  This means that
@@ -1073,6 +1101,6 @@ device_name_translation (char *device, const char *func)
 void
 udev_settle (void)
 {
-  (void) command (NULL, NULL, "/sbin/udevadm", "settle", NULL);
-  (void) command (NULL, NULL, "/sbin/udevsettle", NULL);
+  (void) command (NULL, NULL, "udevadm", "settle", NULL);
+  (void) command (NULL, NULL, "udevsettle", NULL);
 }