rexattr

rexattr.cc

+#include <ftw.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <attr/xattr.h>
+#include <cstdio>
+#include <cstring>
+#include <vector>
+
+std::vector<char> g_xaBuffer(16384);
+std::vector<char> g_xaList(2048);
+int main(int argc, char **argv, char **envp) {
+	struct stat sb;
+	struct rlimit rlim;
+	getrlimit(RLIMIT_NOFILE, &rlim);
+	nftw(argv[1], [](const char* fpath, const struct stat* sb, int typeflag, struct FTW* ftwbuf) {
+		ssize_t lSize = -1;
+		do {
+			lSize = llistxattr(fpath, g_xaList.data(), g_xaList.capacity());
+			if (lSize < 0 && errno == ERANGE) {
+				g_xaList.reserve(g_xaList.capacity() * 2);
+			} else if (lSize < 0) {
+				perror("failed to get xa list");
+				return 1;
+			}
+		} while(lSize < 0);
+
+		if(lSize == 0) {
+			return 0;
+		}
+
+		llistxattr(fpath, g_xaList.data(), lSize);
+
+		fprintf(stderr, "%s\n", fpath);
+
+		const char* lbuf = g_xaList.data();
+
+		for(const char* xa = lbuf; xa < lbuf + lSize; xa += strlen(xa) + 1) {
+			ssize_t xaSize = -1;
+			do {
+				xaSize = lgetxattr(fpath, xa, g_xaBuffer.data(), g_xaBuffer.capacity());
+				if (xaSize < 0 && errno == ERANGE) {
+					g_xaBuffer.reserve(g_xaBuffer.capacity() * 2);
+				} else if(xaSize < 0) {
+					perror("failed to read xattr");
+					return 1;
+				}
+			} while(xaSize < 0);
+
+			lremovexattr(fpath, xa);
+			lsetxattr(fpath, xa, g_xaBuffer.data(), xaSize, XATTR_CREATE);
+		}
+
+		return 0;
+	}, rlim.rlim_max/2, FTW_PHYS | FTW_MOUNT);
+	
+	
+	return 0;
+}