2 * xattrs.c --- Modify extended attributes via debugfs.
4 * Copyright (C) 2014 Oracle. This file may be redistributed
5 * under the terms of the GNU Public License.
17 #include "support/cstring.h"
21 #define PRINT_XATTR_HEX 0x01
22 #define PRINT_XATTR_RAW 0x02
23 #define PRINT_XATTR_C 0x04
24 #define PRINT_XATTR_STATFMT 0x08
25 #define PRINT_XATTR_NOQUOTES 0x10
27 /* Dump extended attributes */
28 static void print_xattr_hex(FILE *f, const char *str, int len)
32 for (i = 0; i < len; i++)
33 fprintf(f, "%02x ", (unsigned char)str[i]);
36 /* Dump extended attributes */
37 static void print_xattr_string(FILE *f, const char *str, int len, int flags)
42 if (flags & PRINT_XATTR_RAW) {
43 fwrite(str, len, 1, f);
47 if ((flags & PRINT_XATTR_C) == 0) {
48 /* check: is string "printable enough?" */
49 for (i = 0; i < len; i++)
53 if (printable <= len*7/8)
54 flags |= PRINT_XATTR_HEX;
57 if (flags & PRINT_XATTR_HEX) {
58 print_xattr_hex(f, str, len);
60 if ((flags & PRINT_XATTR_NOQUOTES) == 0)
62 print_c_string(f, str, len);
63 if ((flags & PRINT_XATTR_NOQUOTES) == 0)
68 static void print_xattr(FILE *f, char *name, char *value, size_t value_len,
71 print_xattr_string(f, name, strlen(name), PRINT_XATTR_NOQUOTES);
72 fprintf(f, " (%zu)", value_len);
73 if ((print_flags & PRINT_XATTR_STATFMT) &&
74 (strcmp(name, "system.data") == 0))
77 (!(print_flags & PRINT_XATTR_STATFMT) || (value_len < 40))) {
79 print_xattr_string(f, value, value_len, print_flags);
84 static int dump_attr(char *name, char *value, size_t value_len, void *data)
89 print_xattr(out, name, value, value_len, PRINT_XATTR_STATFMT);
93 void dump_inode_attributes(FILE *out, ext2_ino_t ino)
95 struct ext2_xattr_handle *h;
99 err = ext2fs_xattrs_open(current_fs, ino, &h);
103 err = ext2fs_xattrs_read(h);
107 err = ext2fs_xattrs_count(h, &sz);
111 fprintf(out, "Extended attributes:\n");
112 err = ext2fs_xattrs_iterate(h, dump_attr, out);
117 err = ext2fs_xattrs_close(&h);
120 void do_list_xattr(int argc, char **argv)
125 printf("%s: Usage: %s <file>\n", argv[0],
130 if (check_fs_open(argv[0]))
133 ino = string_to_inode(argv[1]);
137 dump_inode_attributes(stdout, ino);
140 void do_get_xattr(int argc, char **argv)
143 struct ext2_xattr_handle *h;
152 while ((i = getopt(argc, argv, "Cf:xV")) != -1) {
157 fp = fopen(optarg, "w");
164 print_flags |= PRINT_XATTR_HEX;
167 print_flags |= PRINT_XATTR_RAW;
170 print_flags |= PRINT_XATTR_C;
177 if (optind != argc - 2) {
179 printf("%s: Usage: %s <file> <attr> [-f outfile]|[-xVC]\n",
184 if (check_fs_open(argv[0]))
187 ino = string_to_inode(argv[optind]);
191 err = ext2fs_xattrs_open(current_fs, ino, &h);
195 err = ext2fs_xattrs_read(h);
199 err = ext2fs_xattr_get(h, argv[optind + 1], (void **)&buf, &buflen);
204 fwrite(buf, buflen, 1, fp);
206 if (print_flags & PRINT_XATTR_RAW) {
207 if (print_flags & PRINT_XATTR_HEX|PRINT_XATTR_C)
208 print_flags &= ~PRINT_XATTR_RAW;
209 print_xattr_string(stdout, buf, buflen, print_flags);
211 print_xattr(stdout, argv[optind + 1],
212 buf, buflen, print_flags);
217 ext2fs_free_mem(&buf);
219 ext2fs_xattrs_close(&h);
221 com_err(argv[0], err, "while getting extended attribute");
227 void do_set_xattr(int argc, char **argv)
230 struct ext2_xattr_handle *h;
238 while ((i = getopt(argc, argv, "f:")) != -1) {
243 fp = fopen(optarg, "r");
254 if (!(fp && optind == argc - 2) && !(!fp && optind == argc - 3)) {
256 printf("Usage:\t%s <file> <attr> <value>\n", argv[0]);
257 printf("\t%s -f <value_file> <file> <attr>\n", argv[0]);
261 if (check_fs_open(argv[0]))
263 if (check_fs_read_write(argv[0]))
265 if (check_fs_bitmaps(argv[0]))
268 ino = string_to_inode(argv[optind]);
272 err = ext2fs_xattrs_open(current_fs, ino, &h);
276 err = ext2fs_xattrs_read(h);
281 err = ext2fs_get_mem(current_fs->blocksize, &buf);
284 buflen = fread(buf, 1, current_fs->blocksize, fp);
286 buf = argv[optind + 2];
287 buflen = parse_c_string(buf);
290 err = ext2fs_xattr_set(h, argv[optind + 1], buf, buflen);
294 err = ext2fs_xattrs_write(h);
299 ext2fs_xattrs_close(&h);
301 com_err(argv[0], err, "while setting extended attribute");
305 ext2fs_free_mem(&buf);
309 void do_rm_xattr(int argc, char **argv)
312 struct ext2_xattr_handle *h;
317 printf("%s: Usage: %s <file> <attrs>...\n", argv[0], argv[0]);
321 if (check_fs_open(argv[0]))
323 if (check_fs_read_write(argv[0]))
325 if (check_fs_bitmaps(argv[0]))
328 ino = string_to_inode(argv[1]);
332 err = ext2fs_xattrs_open(current_fs, ino, &h);
336 err = ext2fs_xattrs_read(h);
340 for (i = 2; i < argc; i++) {
341 err = ext2fs_xattr_remove(h, argv[i]);
346 err = ext2fs_xattrs_write(h);
350 ext2fs_xattrs_close(&h);
352 com_err(argv[0], err, "while removing extended attribute");