Exemplo n.º 1
0
/* Has one FileOut parameter. */
int
do_find0 (const char *dir)
{
  struct stat statbuf;
  int r;
  FILE *fp;
  char *cmd;
  char *sysrootdir;
  size_t sysrootdirlen, len;
  char str[GUESTFS_MAX_CHUNK_SIZE];

  sysrootdir = sysroot_path (dir);
  if (!sysrootdir) {
    reply_with_perror ("malloc");
    return -1;
  }

  r = stat (sysrootdir, &statbuf);
  if (r == -1) {
    reply_with_perror ("%s", dir);
    free (sysrootdir);
    return -1;
  }
  if (!S_ISDIR (statbuf.st_mode)) {
    reply_with_error ("%s: not a directory", dir);
    free (sysrootdir);
    return -1;
  }

  sysrootdirlen = strlen (sysrootdir);

  if (asprintf_nowarn (&cmd, "%s %Q -print0", str_find, sysrootdir) == -1) {
    reply_with_perror ("asprintf");
    free (sysrootdir);
    return -1;
  }
  free (sysrootdir);

  if (verbose)
    fprintf (stderr, "%s\n", cmd);

  fp = popen (cmd, "r");
  if (fp == NULL) {
    reply_with_perror ("%s", cmd);
    free (cmd);
    return -1;
  }
  free (cmd);

  /* Now we must send the reply message, before the file contents.  After
   * this there is no opportunity in the protocol to send any error
   * message back.  Instead we can only cancel the transfer.
   */
  reply (NULL, NULL);

  while ((r = input_to_nul (fp, str, GUESTFS_MAX_CHUNK_SIZE)) > 0) {
    len = strlen (str);
    if (len <= sysrootdirlen)
      continue;

    /* Remove the directory part of the path before sending it. */
    if (send_file_write (str + sysrootdirlen, r - sysrootdirlen) < 0) {
      pclose (fp);
      return -1;
    }
  }

  if (ferror (fp)) {
    perror (dir);
    send_file_end (1);                /* Cancel. */
    pclose (fp);
    return -1;
  }

  if (pclose (fp) != 0) {
    perror (dir);
    send_file_end (1);                /* Cancel. */
    return -1;
  }

  if (send_file_end (0))        /* Normal end of file. */
    return -1;

  return 0;
}
Exemplo n.º 2
0
/* Has one FileOut parameter. */
int
do_find0 (const char *dir)
{
  struct stat statbuf;
  int r;
  FILE *fp;
  CLEANUP_FREE char *cmd = NULL;
  CLEANUP_FREE char *sysrootdir = NULL;
  size_t sysrootdirlen;
  CLEANUP_FREE char *str = NULL;

  str = malloc (GUESTFS_MAX_CHUNK_SIZE);
  if (str == NULL) {
    reply_with_perror ("malloc");
    return -1;
  }

  sysrootdir = sysroot_path (dir);
  if (!sysrootdir) {
    reply_with_perror ("malloc");
    return -1;
  }

  r = stat (sysrootdir, &statbuf);
  if (r == -1) {
    reply_with_perror ("%s", dir);
    return -1;
  }
  if (!S_ISDIR (statbuf.st_mode)) {
    reply_with_error ("%s: not a directory", dir);
    return -1;
  }

  sysrootdirlen = strlen (sysrootdir);

  if (asprintf_nowarn (&cmd, "%s %Q -print0", str_find, sysrootdir) == -1) {
    reply_with_perror ("asprintf");
    return -1;
  }

  if (verbose)
    fprintf (stderr, "%s\n", cmd);

  fp = popen (cmd, "r");
  if (fp == NULL) {
    reply_with_perror ("%s", cmd);
    return -1;
  }

  /* Now we must send the reply message, before the file contents.  After
   * this there is no opportunity in the protocol to send any error
   * message back.  Instead we can only cancel the transfer.
   */
  reply (NULL, NULL);

  /* The code below assumes each path returned can fit into a protocol
   * chunk (if not you'll get a runtime protocol error).  If this
   * turns out not to be a problem at some point in the future then
   * we'll need to modify the code to handle it.  XXX
   */
  while ((r = input_to_nul (fp, str, GUESTFS_MAX_CHUNK_SIZE)) > 0) {
    size_t len = strlen (str);
    if (len <= sysrootdirlen)
      continue;

    /* Remove the directory part of the path before sending it. */
    if (send_file_write (str + sysrootdirlen, r - sysrootdirlen) < 0) {
      pclose (fp);
      return -1;
    }
  }

  if (ferror (fp)) {
    fprintf (stderr, "fgetc: %s: %m\n", dir);
    send_file_end (1);                /* Cancel. */
    pclose (fp);
    return -1;
  }

  if (pclose (fp) != 0) {
    fprintf (stderr, "pclose: %s: %m\n", dir);
    send_file_end (1);                /* Cancel. */
    return -1;
  }

  if (send_file_end (0))        /* Normal end of file. */
    return -1;

  return 0;
}