X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=daemon%2Fguestfsd.c;h=5938846eb9ec283ad1d8512c06f036c0564c4f5f;hb=e494a59921456d854a070612dad3e7c1e83f30a1;hp=a8b53e730f781e5990d4a272472272ae381a9dec;hpb=8bd3f92e1739f5636c0b77799fad52f387241b9c;p=libguestfs.git

diff --git a/daemon/guestfsd.c b/daemon/guestfsd.c
index a8b53e7..5938846 100644
--- a/daemon/guestfsd.c
+++ b/daemon/guestfsd.c
@@ -142,7 +142,7 @@ main (int argc, char *argv[])
   int dont_fork = 0;
   char *cmdline;
 
-  chdir ("/");
+  ignore_value (chdir ("/"));
 
   if (winsock_init () == -1)
     error (EXIT_FAILURE, 0, "winsock initialization failed");
@@ -444,6 +444,7 @@ add_string (char ***argv, int *size, int *alloc, const char *str)
     if (new_str == NULL) {
       reply_with_perror ("strdup");
       free_strings (*argv);
+      return -1;
     }
   } else
     new_str = NULL;
@@ -694,6 +695,7 @@ commandrvf (char **stdoutput, char **stderror, int flags,
   }
 
   if (pid == 0) {		/* Child process running the command. */
+    signal (SIGPIPE, SIG_DFL);
     close (0);
     if (flag_copy_stdin) {
       dup2 (stdin_fd[0], 0);
@@ -701,7 +703,7 @@ commandrvf (char **stdoutput, char **stderror, int flags,
       close (stdin_fd[1]);
     } else {
       /* Set stdin to /dev/null (ignore failure) */
-      open ("/dev/null", O_RDONLY);
+      ignore_value (open ("/dev/null", O_RDONLY));
     }
     close (so_fd[0]);
     close (se_fd[0]);
@@ -782,13 +784,29 @@ commandrvf (char **stdoutput, char **stderror, int flags,
 
   quit = 0;
   while (quit < 2) {
+  again:
     rset2 = rset;
     r = select (MAX (so_fd[0], se_fd[0]) + 1, &rset2, NULL, NULL, NULL);
     if (r == -1) {
+      if (errno == EINTR)
+        goto again;
+
       perror ("select");
     quit:
-      if (stdoutput) free (*stdoutput);
-      if (stderror) free (*stderror);
+      if (stdoutput) {
+        free (*stdoutput);
+        *stdoutput = NULL;
+      }
+      if (stderror) {
+        free (*stderror);
+        /* Need to return non-NULL *stderror here since most callers
+         * will try to print and then free the err string.
+         * Unfortunately recovery from strdup failure here is not
+         * possible.
+         */
+        *stderror = strdup ("error running external command, "
+                            "see debug output for details");
+      }
       close (so_fd[0]);
       close (se_fd[0]);
       waitpid (pid, NULL, 0);