am 4f35e623: sdcard: Add command line options for lowercase file name squashing: (cfee7769) · Commits · e / os / android_system_core

sdcard/sdcard.c

+119 −16

Original line number	Diff line number	Diff line
		@@ -108,6 +108,9 @@ struct fuse {
		char rootpath[1024];
		};

		/* true if file names should be squashed to lower case */
		static int force_lower_case = 0;

		#define PATH_BUFFER_SIZE 1024

		/*
		@@ -442,12 +445,80 @@ void lookup_entry(struct fuse fuse, struct node node,
		fuse_reply(fuse, unique, &out, sizeof(out));
		}

		static int name_needs_normalizing(const char* name) {
		char ch;
		while ((ch = *name++) != 0) {
		if (ch != tolower(ch))
		return 1;
		}
		return 0;
		}

		static void normalize_name(char *name)
		{
		if (force_lower_case) {
		char ch;
		while ((ch = *name) != 0)
		*name++ = tolower(ch);
		}
		}

		static void fix_files_lower_case(const char* path) {
		DIR* dir;
		struct dirent* entry;
		char pathbuf[PATH_MAX];
		char oldpath[PATH_MAX];
		int pathLength = strlen(path);
		int pathRemaining;
		char* fileSpot;

		if (pathLength >= sizeof(pathbuf) - 1) {
		ERROR("path too long: %s\n", path);
		return;
		}
		strcpy(pathbuf, path);
		if (pathbuf[pathLength - 1] != '/') {
		pathbuf[pathLength++] = '/';
		}
		fileSpot = pathbuf + pathLength;
		pathRemaining = sizeof(pathbuf) - pathLength - 1;

		dir = opendir(path);
		if (!dir) {
		ERROR("opendir %s failed: %s", path, strerror(errno));
		return;
		}

		while ((entry = readdir(dir))) {
		const char* name = entry->d_name;
		int nameLength;

		// ignore "." and ".."
		if (name[0] == '.' && (name[1] == 0 \|\| (name[1] == '.' && name[2] == 0))) {
		continue;
		}

		nameLength = strlen(name);
		if (nameLength > pathRemaining) {
		ERROR("path %s/%s too long\n", path, name);
		continue;
		}
		strcpy(fileSpot, name);

		if (name_needs_normalizing(name)) {
		/* rename file to lower case file name */
		strlcpy(oldpath, pathbuf, sizeof(oldpath));
		normalize_name(pathbuf);
		rename(oldpath, pathbuf);
		}

		if (entry->d_type == DT_DIR) {
		/* recurse to subdirectories */
		fix_files_lower_case(pathbuf);
		}
		}
		closedir(dir);
		}

		void handle_fuse_request(struct fuse fuse, struct fuse_in_header hdr, void *data, unsigned len)
		{
		@@ -843,30 +914,59 @@ void handle_fuse_requests(struct fuse *fuse)
		}
		}

		static int usage()
		{
		ERROR("usage: sdcard [-l -f] <path> <uid> <gid>\n\n\t-l force file names to lower case when creating new files\n\t-f fix up any existing file names at are not lower case\n");
		return -1;
		}

		int main(int argc, char **argv)
		{
		struct fuse fuse;
		char opts[256];
		int fd;
		int res;
		unsigned uid;
		unsigned gid;
		const char *path;

		if (argc != 4) {
		ERROR("usage: sdcard <path> <uid> <gid>\n");
		return -1;
		unsigned uid = -1;
		unsigned gid = -1;
		const char *path = NULL;
		int check_files = 0;
		int i;

		for (i = 1; i < argc; i++) {
		char* arg = argv[i];
		if (arg[0] == '-') {
		if (!strcmp(arg, "-l")) {
		force_lower_case = 1;
		ERROR("force_lower_case\n");
		} else if (!strcmp(arg, "-f")) {
		check_files = 1;
		ERROR("check_files\n");
		} else {
		return usage();
		}
		} else {
		if (!path)
		path = arg;
		else if (uid == -1)
		uid = strtoul(arg, 0, 10);
		else if (gid == -1)
		gid = strtoul(arg, 0, 10);
		else {
		ERROR("too many arguments\n");
		return usage();
		}
		}
		}

		uid = strtoul(argv[2], 0, 10);
		gid = strtoul(argv[3], 0, 10);
		if (!uid \|\| !gid) {
		if (!path) {
		ERROR("no path specified\n");
		return usage();
		}
		if (uid <= 0 \|\| gid <= 0) {
		ERROR("uid and gid must be nonzero\n");
		return -1;
		return usage();
		}

		path = argv[1];

		/* cleanup from previous instance, if necessary */
		umount2(MOUNT_POINT, 2);

		@@ -894,6 +994,9 @@ int main(int argc, char **argv)
		return -1;
		}

		if (check_files)
		fix_files_lower_case(path);

		fuse_init(&fuse, fd, path);

		umask(0);