#include "git-compat-util.h"

#include "config.h"

#include "fsmonitor-ll.h"

#include "fsmonitor-ipc.h"

#include "fsmonitor-settings.h"

#include "fsmonitor-path-utils.h"

 /*

 * For the builtin FSMonitor, we create the Unix domain socket for the

 * IPC in the .git directory.  If the working directory is remote,

 * then the socket will be created on the remote file system.  This

 * can fail if the remote file system does not support UDS file types

 * (e.g. smbfs to a Windows server) or if the remote kernel does not

 * allow a non-local process to bind() the socket.  (These problems

 * could be fixed by moving the UDS out of the .git directory and to a

 * well-known local directory on the client machine, but care should

 * be taken to ensure that $HOME is actually local and not a managed

 * file share.)

 *

 * FAT32 and NTFS working directories are problematic too.

 *

 * The builtin FSMonitor uses a Unix domain socket in the .git

 * directory for IPC.  These Windows drive formats do not support

 * Unix domain sockets, so mark them as incompatible for the daemon.

 *

 */

static enum fsmonitor_reason check_uds_volume(struct repository *r)

{

  struct fs_info fs;

  const char *ipc_path = fsmonitor_ipc__get_path(r);

  struct strbuf path = STRBUF_INIT;

  strbuf_add(&path, ipc_path, strlen(ipc_path));

  if (fsmonitor__get_fs_info(dirname(path.buf), &fs) == -1) {

    strbuf_release(&path);

    return FSMONITOR_REASON_ERROR;

  }

  strbuf_release(&path);

  if (fs.is_remote ||

    !strcmp(fs.typename, "msdos") ||

    !strcmp(fs.typename, "ntfs")) {

    free(fs.typename);

    return FSMONITOR_REASON_NOSOCKETS;

  }

  free(fs.typename);

  return FSMONITOR_REASON_OK;

}

enum fsmonitor_reason fsm_os__incompatible(struct repository *r, int ipc)

{

  enum fsmonitor_reason reason;

  if (ipc) {

    reason = check_uds_volume(r);

    if (reason != FSMONITOR_REASON_OK)

      return reason;

  }

  return FSMONITOR_REASON_OK;

}