Add Missing netatalk files

src/nwatalk.c

@@ -0,0 +1,102 @@
+/* Optional Netatalk/libatalk AFP metadata backend helpers. */
+#include "net.h"
+#include "config.h"
+#include "nwatalk.h"
+#include "tools.h"
+
+#include <string.h>
+
+#if NETATALK_SUPPORT
+#include <errno.h>
+#include <sys/stat.h>
+#include <atalk/adouble.h>
+#endif
+
+int nwatalk_backend_available(void)
+{
+#if NETATALK_SUPPORT
+  return(1);
+#else
+  return(0);
+#endif
+}
+
+#if NETATALK_SUPPORT
+static int nwatalk_open_adouble(const char *path, struct adouble *ad)
+{
+  int result;
+
+  if (!path || !*path) return(-0x9c); /* invalid path */
+
+  ad_init_old(ad, AD_VERSION, 0);
+
+  result = ad_open(ad, path,
+                   ADFLAGS_HF | ADFLAGS_RF | ADFLAGS_RDONLY |
+                   ADFLAGS_NOHF | ADFLAGS_NORF);
+  if (result < 0) {
+    return(-0x9c);
+  }
+
+  return(0);
+}
+#endif
+
+int nwatalk_get_finder_info(const char *path, uint8 *finder_info,
+                            int finder_info_len)
+{
+#if NETATALK_SUPPORT
+  struct adouble ad;
+  void *entry;
+  int result;
+
+  if (!finder_info || finder_info_len < NWATALK_FINDER_INFO_LEN) {
+    return(-0x9c);
+  }
+
+  memset(finder_info, 0, finder_info_len);
+
+  result = nwatalk_open_adouble(path, &ad);
+  if (result < 0) return(result);
+
+  entry = ad_entry(&ad, ADEID_FINDERI);
+  if (entry && ad_getentrylen(&ad, ADEID_FINDERI) >= NWATALK_FINDER_INFO_LEN) {
+    memcpy(finder_info, entry, NWATALK_FINDER_INFO_LEN);
+  }
+
+  ad_close(&ad, 0);
+  return(0);
+#else
+  (void)path;
+  (void)finder_info;
+  (void)finder_info_len;
+  return(-0xbf); /* invalid namespace / backend unavailable */
+#endif
+}
+
+int nwatalk_get_resource_fork_size(const char *path, uint32 *resource_size)
+{
+#if NETATALK_SUPPORT
+  struct adouble ad;
+  off_t size;
+  int result;
+
+  if (!resource_size) return(-0x9c);
+  *resource_size = 0;
+
+  result = nwatalk_open_adouble(path, &ad);
+  if (result < 0) return(result);
+
+  size = ad_size(&ad, ADEID_RFORK);
+  if (size > 0) {
+    if (size > 0xffffffffUL) size = 0xffffffffUL;
+    *resource_size = (uint32)size;
+  }
+
+  ad_close(&ad, 0);
+  return(0);
+#else
+  (void)path;
+  (void)resource_size;
+  return(-0xbf); /* invalid namespace / backend unavailable */
+#endif
+}