Remove dependency on non-POSIX header error.h.

[plocate] / updatedb.cpp

diff --git a/updatedb.cpp b/updatedb.cpp
index 8d524c6872038b4c72829de3d12cbb354f6fc760..e1320b3e1ef58affd7dda61f7486921589754f8f 100644 (file)
--- a/updatedb.cpp
+++ b/updatedb.cpp
@@ -610,8 +610,12 @@ int scan(const string &path, int fd, dev_t parent_dev, dir_time modified, dir_ti
        } else {
                dir = fdopendir(fd);  // Takes over ownership of fd.
                if (dir == nullptr) {
-                       perror("fdopendir");
-                       exit(1);
+                       // fdopendir() wants to fstat() the fd to verify that it's indeed
+                       // a directory, which can seemingly fail on at least CIFS filesystems
+                       // if the server feels like it. We treat this as if we had an error
+                       // on opening it, ie., ignore the directory.
+                       close(fd);
+                       return 0;
                }
 
                dirent *de;
@@ -713,7 +717,21 @@ int scan(const string &path, int fd, dev_t parent_dev, dir_time modified, dir_ti
 
                struct stat buf;
                if (fstat(e.fd, &buf) != 0) {
-                       perror(path.c_str());
+                       // It's possible that this is a filesystem that's excluded
+                       // (and the failure is e.g. because the network is down).
+                       // As a last-ditch effort, we try to check that before dying,
+                       // i.e., duplicate the check from further down.
+                       //
+                       // It would be better to be able to run filesystem_is_excluded()
+                       // for cheap on everything and just avoid the stat, but it seems
+                       // hard to do that without any kind of raciness.
+                       if (filesystem_is_excluded((path_plus_slash + e.name).c_str())) {
+                               close(e.fd);
+                               e.fd = -1;
+                               continue;
+                       }
+
+                       perror((path_plus_slash + e.name).c_str());
                        exit(1);
                }