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[rrq/fuse_xattrs.git] / fuse_xattrs.c

diff --git a/fuse_xattrs.c b/fuse_xattrs.c
index 48e136b0796ea94ea840912d2138452002ffbc8f..fe5637071b0daae80bb952b9f17cd43fc2fd0695 100644 (file)
--- a/fuse_xattrs.c
+++ b/fuse_xattrs.c
@@ -14,17 +14,21 @@
 /* For pread()/pwrite()/utimensat() */
 #define _XOPEN_SOURCE 700
 
-/* For get_current_dir_name */
-#define _GNU_SOURCE
-
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <stddef.h>
+#include <assert.h>
+
+#ifdef __APPLE__
+    #include <osxfuse/fuse.h>
+#else
+    #include <fuse.h>
+#endif
 
-#include <fuse.h>
 #include <sys/xattr.h>
+#include <sys/param.h>
 
 #include "fuse_xattrs_config.h"
 
@@ -34,13 +38,15 @@
 
 #include "binary_storage.h"
 
+struct xattrs_config xattrs_config;
+
 static int xmp_setxattr(const char *path, const char *name, const char *value, size_t size, int flags)
 {
     if (xattrs_config.show_sidecar == 0 && filename_is_sidecar(path) == 1)  {
         return -ENOENT;
     }
 
-    if (get_namespace(name) != USER) {
+    if (xattrs_config.enable_namespaces == 1 && get_namespace(name) != USER) {
         debug_print("Only user namespace is supported. name=%s\n", name);
         return -ENOTSUP;
     }
@@ -53,7 +59,7 @@ static int xmp_setxattr(const char *path, const char *name, const char *value, s
         return -ENOSPC;
     }
 
-    char *_path = prepend_source_directory(xattrs_config.source_dir, path);
+    char *_path = prepend_source_directory(path);
 
 #ifdef DEBUG
     char *sanitized_value = sanitize_value(value, size);
@@ -75,7 +81,7 @@ static int xmp_getxattr(const char *path, const char *name, char *value, size_t
         return -ENOENT;
     }
 
-    if (get_namespace(name) != USER) {
+    if (xattrs_config.enable_namespaces == 1 && get_namespace(name) != USER) {
         debug_print("Only user namespace is supported. name=%s\n", name);
         return -ENOTSUP;
     }
@@ -84,7 +90,7 @@ static int xmp_getxattr(const char *path, const char *name, char *value, size_t
         return -ERANGE;
     }
 
-    char *_path = prepend_source_directory(xattrs_config.source_dir, path);
+    char *_path = prepend_source_directory(path);
     debug_print("path=%s name=%s size=%zu\n", _path, name, size);
     int rtval = binary_storage_read_key(_path, name, value, size);
     free(_path);
@@ -92,6 +98,18 @@ static int xmp_getxattr(const char *path, const char *name, char *value, size_t
     return rtval;
 }
 
+#ifdef __APPLE__
+    static int xmp_setxattr_apple(const char *path, const char *name, const char *value, size_t size, int flags, u_int32_t position) {
+        assert(position == 0);
+        return xmp_setxattr(path, name, value, size, flags);
+    }
+
+    static int xmp_getxattr_apple(const char *path, const char *name, char *value, size_t size, u_int32_t position) {
+        assert(position == 0);
+        return xmp_getxattr(path, name, value, size);
+    }
+#endif
+
 static int xmp_listxattr(const char *path, char *list, size_t size)
 {
     if (xattrs_config.show_sidecar == 0 && filename_is_sidecar(path) == 1)  {
@@ -103,7 +121,7 @@ static int xmp_listxattr(const char *path, char *list, size_t size)
         return -E2BIG;
     }
 
-    char *_path = prepend_source_directory(xattrs_config.source_dir, path);
+    char *_path = prepend_source_directory(path);
     debug_print("path=%s size=%zu\n", _path, size);
     int rtval = binary_storage_list_keys(_path, list, size);
     free(_path);
@@ -117,7 +135,7 @@ static int xmp_removexattr(const char *path, const char *name)
         return -ENOENT;
     }
 
-    if (get_namespace(name) != USER) {
+    if (xattrs_config.enable_namespaces == 1 && get_namespace(name) != USER) {
         debug_print("Only user namespace is supported. name=%s\n", name);
         return -ENOTSUP;
     }
@@ -126,7 +144,7 @@ static int xmp_removexattr(const char *path, const char *name)
         return -ERANGE;
     }
 
-    char *_path = prepend_source_directory(xattrs_config.source_dir, path);
+    char *_path = prepend_source_directory(path);
     debug_print("path=%s name=%s\n", _path, name);
     int rtval = binary_storage_remove_key(_path, name);
     free(_path);
@@ -161,28 +179,17 @@ static struct fuse_operations xmp_oper = {
 #ifdef HAVE_POSIX_FALLOCATE
         .fallocate   = xmp_fallocate,
 #endif
+#ifdef __APPLE__
+        .setxattr    = xmp_setxattr_apple,
+        .getxattr    = xmp_getxattr_apple,
+#else
         .setxattr    = xmp_setxattr,
         .getxattr    = xmp_getxattr,
+#endif
         .listxattr   = xmp_listxattr,
         .removexattr = xmp_removexattr,
 };
 
-
-int is_directory(const char *path) {
-    struct stat statbuf;
-    if (stat(path, &statbuf) != 0) {
-        fprintf(stderr, "cannot get source directory status: %s\n", path);
-        return -1;
-    }
-
-    if (!S_ISDIR(statbuf.st_mode)) {
-        fprintf(stderr, "source directory must be a directory: %s\n", path);
-        return -1;
-    }
-
-    return 1;
-}
-
 /**
  * Check if the path is valid. If it's a relative path,
  * prepend the working path.
@@ -204,7 +211,8 @@ const char *sanitized_source_directory(const char *path) {
         return absolute_path;
     }
 
-    char *pwd = get_current_dir_name();
+    static char cwd[MAXPATHLEN];
+    char *pwd = getcwd(cwd, sizeof(cwd));
     size_t len = strlen(pwd) + 1 + strlen(path) + 1;
     int has_trailing_backslash = (path[strlen(path)-1] == '/');
     if (!has_trailing_backslash)
@@ -233,7 +241,8 @@ enum {
 #define FUSE_XATTRS_OPT(t, p, v) { t, offsetof(struct xattrs_config, p), v }
 
 static struct fuse_opt xattrs_opts[] = {
-        FUSE_XATTRS_OPT("show_sidecar",    show_sidecar, 1),
+        FUSE_XATTRS_OPT("show_sidecar",         show_sidecar,       1),
+        FUSE_XATTRS_OPT("enable_namespaces",    enable_namespaces,  1),
 
         FUSE_OPT_KEY("-V",                 KEY_VERSION),
         FUSE_OPT_KEY("--version",          KEY_VERSION),
@@ -249,6 +258,7 @@ static int xattrs_opt_proc(void *data, const char *arg, int key,
         case FUSE_OPT_KEY_NONOPT:
             if (!xattrs_config.source_dir) {
                 xattrs_config.source_dir = sanitized_source_directory(arg);
+                xattrs_config.source_dir_size = strlen(xattrs_config.source_dir);
                 return 0;
             }
             break;
@@ -264,6 +274,7 @@ static int xattrs_opt_proc(void *data, const char *arg, int key,
                             "\n"
                             "FUSE XATTRS options:\n"
                             "    -o show_sidecar  don't hide sidecar files\n"
+                            "    -o enable_namespaces  enable namespaces checks\n"
                             "\n", outargs->argv[0]);
 
             fuse_opt_add_arg(outargs, "-ho");
@@ -294,5 +305,8 @@ int main(int argc, char *argv[]) {
     }
 
     umask(0);
+
+    // disable multi-threading
+    fuse_opt_add_arg(&args, "-s");
     return fuse_main(args.argc, args.argv, &xmp_oper, NULL);
 }