/*
fuse_xattrs - Add xattrs support using sidecar files
- Copyright (C) 2016 Felipe Barriga Richards <felipe {at} felipebarriga.cl>
+ Copyright (C) 2016-2017 Felipe Barriga Richards <felipe {at} felipebarriga.cl>
Based on passthrough.c (libfuse example)
/* 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 <fuse.h>
#include <sys/xattr.h>
+#include "fuse_xattrs_config.h"
+
+#include "xattrs_config.h"
#include "utils.h"
#include "passthrough.h"
#include "binary_storage.h"
-#include "const.h"
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) {
debug_print("Only user namespace is supported. name=%s\n", name);
return -ENOTSUP;
return -ENOSPC;
}
+ char *_path = prepend_source_directory(path);
+
#ifdef DEBUG
char *sanitized_value = sanitize_value(value, size);
debug_print("path=%s name=%s value=%s size=%zu XATTR_CREATE=%d XATTR_REPLACE=%d\n",
- path, name, sanitized_value, size, flags & XATTR_CREATE, flags & XATTR_REPLACE);
+ _path, name, sanitized_value, size, flags & XATTR_CREATE, flags & XATTR_REPLACE);
free(sanitized_value);
#endif
- return binary_storage_write_key(path, name, value, size, flags);
+
+ int rtval = binary_storage_write_key(_path, name, value, size, flags);
+ free(_path);
+
+ return rtval;
}
static int xmp_getxattr(const char *path, const char *name, char *value, size_t size)
{
+ if (xattrs_config.show_sidecar == 0 && filename_is_sidecar(path) == 1) {
+ return -ENOENT;
+ }
+
if (get_namespace(name) != USER) {
debug_print("Only user namespace is supported. name=%s\n", name);
return -ENOTSUP;
return -ERANGE;
}
- debug_print("path=%s name=%s size=%zu\n", path, name, size);
- return binary_storage_read_key(path, name, value, size);
+ 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);
+
+ return rtval;
}
static int xmp_listxattr(const char *path, char *list, size_t size)
{
+ if (xattrs_config.show_sidecar == 0 && filename_is_sidecar(path) == 1) {
+ return -ENOENT;
+ }
+
if (size > XATTR_LIST_MAX) {
debug_print("The size of the list of attribute names for this file exceeds the system-imposed limit.\n");
return -E2BIG;
}
- debug_print("path=%s size=%zu\n", path, size);
- return binary_storage_list_keys(path, list, size);
+ 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);
+
+ return rtval;
}
static int xmp_removexattr(const char *path, const char *name)
{
+ if (xattrs_config.show_sidecar == 0 && filename_is_sidecar(path) == 1) {
+ return -ENOENT;
+ }
+
if (get_namespace(name) != USER) {
debug_print("Only user namespace is supported. name=%s\n", name);
return -ENOTSUP;
return -ERANGE;
}
- debug_print("path=%s name=%s\n", path, name);
- return binary_storage_remove_key(path, name);
+ 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);
+
+ return rtval;
}
static struct fuse_operations xmp_oper = {
.removexattr = xmp_removexattr,
};
-int main(int argc, char *argv[])
-{
- // TODO: parse options...
+/**
+ * Check if the path is valid. If it's a relative path,
+ * prepend the working path.
+ * @param path relative or absolute path to eval.
+ * @return new string with absolute path
+ */
+const char *sanitized_source_directory(const char *path) {
+ char *absolute_path;
+ if (strlen(path) == 0) {
+ return NULL;
+ }
+
+ /* absolute path, we don't do anything */
+ if (path[0] == '/') {
+ if (is_directory(path) == -1) {
+ return NULL;
+ }
+ absolute_path = strdup(path);
+ return absolute_path;
+ }
+
+ char *pwd = get_current_dir_name();
+ size_t len = strlen(pwd) + 1 + strlen(path) + 1;
+ int has_trailing_backslash = (path[strlen(path)-1] == '/');
+ if (!has_trailing_backslash)
+ len++;
+
+ absolute_path = (char*) malloc(sizeof(char) * len);
+ memset(absolute_path, '\0', len);
+ sprintf(absolute_path, "%s/%s", pwd, path);
+
+ if(!has_trailing_backslash)
+ absolute_path[len-2] = '/';
+
+ if (is_directory(absolute_path) == -1) {
+ free(absolute_path);
+ return NULL;
+ }
+
+ return absolute_path;
+}
+
+enum {
+ KEY_HELP,
+ KEY_VERSION,
+};
+
+#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_OPT_KEY("-V", KEY_VERSION),
+ FUSE_OPT_KEY("--version", KEY_VERSION),
+ FUSE_OPT_KEY("-h", KEY_HELP),
+ FUSE_OPT_KEY("--help", KEY_HELP),
+ FUSE_OPT_END
+};
+
+static int xattrs_opt_proc(void *data, const char *arg, int key,
+ struct fuse_args *outargs) {
+ (void) data;
+ switch (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;
+
+ case KEY_HELP:
+ fprintf(stderr,
+ "usage: %s source_dir mountpoint [options]\n"
+ "\n"
+ "general options:\n"
+ " -o opt,[opt...] mount options\n"
+ " -h --help print help\n"
+ " -V --version print version\n"
+ "\n"
+ "FUSE XATTRS options:\n"
+ " -o show_sidecar don't hide sidecar files\n"
+ "\n", outargs->argv[0]);
+
+ fuse_opt_add_arg(outargs, "-ho");
+ fuse_main(outargs->argc, outargs->argv, &xmp_oper, NULL);
+ exit(1);
+
+ case KEY_VERSION:
+ printf("FUSE_XATTRS version %d.%d\n", FUSE_XATTRS_VERSION_MAJOR, FUSE_XATTRS_VERSION_MINOR);
+ fuse_opt_add_arg(outargs, "--version");
+ fuse_main(outargs->argc, outargs->argv, &xmp_oper, NULL);
+ exit(0);
+ }
+ return 1;
+}
+
+
+
+int main(int argc, char *argv[]) {
+ struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
+ if (fuse_opt_parse(&args, &xattrs_config, xattrs_opts, xattrs_opt_proc) == -1) {
+ exit(1);
+ }
+
+ if (!xattrs_config.source_dir) {
+ fprintf(stderr, "missing source directory\n");
+ fprintf(stderr, "see `%s -h' for usage\n", argv[0]);
+ exit(1);
+ }
+
umask(0);
- return fuse_main(argc, argv, &xmp_oper, NULL);
+
+ // disable multi-threading
+ fuse_opt_add_arg(&args, "-s");
+ return fuse_main(args.argc, args.argv, &xmp_oper, NULL);
}
projects / rrq / fuse_xattrs.git / blobdiff