2014-03-12 07:49:58 +04:00
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/*
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* xattrs.c --- Modify extended attributes via debugfs.
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*
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* Copyright (C) 2014 Oracle. This file may be redistributed
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* under the terms of the GNU Public License.
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*/
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#include "config.h"
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#include <stdio.h>
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#else
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extern int optind;
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extern char *optarg;
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#endif
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#include <ctype.h>
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#include "debugfs.h"
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/* Dump extended attributes */
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static void dump_xattr_string(FILE *out, const char *str, int len)
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{
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int printable = 0;
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int i;
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/* check: is string "printable enough?" */
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for (i = 0; i < len; i++)
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if (isprint(str[i]))
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printable++;
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if (printable <= len*7/8)
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printable = 0;
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for (i = 0; i < len; i++)
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if (printable)
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fprintf(out, isprint(str[i]) ? "%c" : "\\%03o",
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(unsigned char)str[i]);
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else
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fprintf(out, "%02x ", (unsigned char)str[i]);
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}
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static int dump_attr(char *name, char *value, size_t value_len, void *data)
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{
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FILE *out = data;
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fprintf(out, " ");
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dump_xattr_string(out, name, strlen(name));
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2014-07-23 02:01:53 +04:00
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if (strcmp(name, "system.data") != 0) {
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fprintf(out, " = \"");
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dump_xattr_string(out, value, value_len);
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fprintf(out, "\"");
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}
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fprintf(out, " (%zu)\n", value_len);
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2014-03-12 07:49:58 +04:00
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return 0;
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}
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void dump_inode_attributes(FILE *out, ext2_ino_t ino)
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{
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struct ext2_xattr_handle *h;
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size_t sz;
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errcode_t err;
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err = ext2fs_xattrs_open(current_fs, ino, &h);
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if (err)
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return;
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err = ext2fs_xattrs_read(h);
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if (err)
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goto out;
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err = ext2fs_xattrs_count(h, &sz);
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if (err || sz == 0)
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goto out;
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fprintf(out, "Extended attributes:\n");
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err = ext2fs_xattrs_iterate(h, dump_attr, out);
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if (err)
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goto out;
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out:
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err = ext2fs_xattrs_close(&h);
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}
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void do_list_xattr(int argc, char **argv)
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{
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ext2_ino_t ino;
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if (argc != 2) {
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printf("%s: Usage: %s <file>\n", argv[0],
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argv[0]);
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return;
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}
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if (check_fs_open(argv[0]))
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return;
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ino = string_to_inode(argv[1]);
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if (!ino)
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return;
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dump_inode_attributes(stdout, ino);
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}
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void do_get_xattr(int argc, char **argv)
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{
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ext2_ino_t ino;
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struct ext2_xattr_handle *h;
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FILE *fp = NULL;
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char *buf = NULL;
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size_t buflen;
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int i;
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errcode_t err;
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reset_getopt();
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while ((i = getopt(argc, argv, "f:")) != -1) {
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switch (i) {
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case 'f':
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2014-05-27 21:02:12 +04:00
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if (fp)
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fclose(fp);
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2014-03-12 07:49:58 +04:00
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fp = fopen(optarg, "w");
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if (fp == NULL) {
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perror(optarg);
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return;
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}
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break;
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default:
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printf("%s: Usage: %s <file> <attr> [-f outfile]\n",
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argv[0], argv[0]);
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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}
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}
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if (optind != argc - 2) {
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printf("%s: Usage: %s <file> <attr> [-f outfile]\n", argv[0],
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argv[0]);
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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}
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if (check_fs_open(argv[0]))
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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ino = string_to_inode(argv[optind]);
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if (!ino)
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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err = ext2fs_xattrs_open(current_fs, ino, &h);
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if (err)
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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err = ext2fs_xattrs_read(h);
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if (err)
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goto out;
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err = ext2fs_xattr_get(h, argv[optind + 1], (void **)&buf, &buflen);
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if (err)
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goto out;
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if (fp) {
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fwrite(buf, buflen, 1, fp);
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} else {
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dump_xattr_string(stdout, buf, buflen);
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printf("\n");
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}
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2014-05-12 02:34:50 +04:00
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ext2fs_free_mem(&buf);
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2014-03-12 07:49:58 +04:00
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out:
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ext2fs_xattrs_close(&h);
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if (err)
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com_err(argv[0], err, "while getting extended attribute");
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2014-05-12 02:34:50 +04:00
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out2:
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if (fp)
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fclose(fp);
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2014-03-12 07:49:58 +04:00
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}
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void do_set_xattr(int argc, char **argv)
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{
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ext2_ino_t ino;
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struct ext2_xattr_handle *h;
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FILE *fp = NULL;
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char *buf = NULL;
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size_t buflen;
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int i;
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errcode_t err;
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reset_getopt();
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while ((i = getopt(argc, argv, "f:")) != -1) {
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switch (i) {
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case 'f':
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2014-05-27 21:02:12 +04:00
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if (fp)
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fclose(fp);
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2014-03-12 07:49:58 +04:00
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fp = fopen(optarg, "r");
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if (fp == NULL) {
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perror(optarg);
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return;
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}
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break;
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default:
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2016-06-06 23:49:37 +03:00
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goto print_usage;
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2014-03-12 07:49:58 +04:00
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}
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}
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2015-01-27 18:58:17 +03:00
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if (!(fp && optind == argc - 2) && !(!fp && optind == argc - 3)) {
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2016-06-06 23:49:37 +03:00
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print_usage:
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printf("Usage:\t%s <file> <attr> <value>\n", argv[0]);
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printf("\t%s -f <value_file> <file> <attr>\n", argv[0]);
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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}
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if (check_fs_open(argv[0]))
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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if (check_fs_read_write(argv[0]))
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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if (check_fs_bitmaps(argv[0]))
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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ino = string_to_inode(argv[optind]);
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if (!ino)
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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err = ext2fs_xattrs_open(current_fs, ino, &h);
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if (err)
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2014-05-12 02:34:50 +04:00
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goto out2;
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2014-03-12 07:49:58 +04:00
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err = ext2fs_xattrs_read(h);
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if (err)
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goto out;
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if (fp) {
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err = ext2fs_get_mem(current_fs->blocksize, &buf);
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if (err)
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goto out;
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buflen = fread(buf, 1, current_fs->blocksize, fp);
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} else {
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buf = argv[optind + 2];
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buflen = strlen(argv[optind + 2]);
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}
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err = ext2fs_xattr_set(h, argv[optind + 1], buf, buflen);
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if (err)
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goto out;
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err = ext2fs_xattrs_write(h);
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if (err)
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goto out;
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out:
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2014-05-12 02:34:50 +04:00
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ext2fs_xattrs_close(&h);
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if (err)
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com_err(argv[0], err, "while setting extended attribute");
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out2:
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2014-03-12 07:49:58 +04:00
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if (fp) {
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fclose(fp);
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ext2fs_free_mem(&buf);
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}
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}
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void do_rm_xattr(int argc, char **argv)
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{
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ext2_ino_t ino;
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struct ext2_xattr_handle *h;
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int i;
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errcode_t err;
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if (argc < 3) {
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printf("%s: Usage: %s <file> <attrs>...\n", argv[0], argv[0]);
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return;
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}
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if (check_fs_open(argv[0]))
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return;
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if (check_fs_read_write(argv[0]))
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return;
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if (check_fs_bitmaps(argv[0]))
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return;
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ino = string_to_inode(argv[1]);
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if (!ino)
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return;
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err = ext2fs_xattrs_open(current_fs, ino, &h);
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if (err)
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return;
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err = ext2fs_xattrs_read(h);
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if (err)
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goto out;
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for (i = 2; i < argc; i++) {
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err = ext2fs_xattr_remove(h, argv[i]);
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if (err)
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goto out;
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}
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err = ext2fs_xattrs_write(h);
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if (err)
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goto out;
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out:
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ext2fs_xattrs_close(&h);
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if (err)
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com_err(argv[0], err, "while removing extended attribute");
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}
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