#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/types.h>
-#include <attr/xattr.h>
+#include <sys/xattr.h>
#include <fcntl.h>
#include <unistd.h>
#define XATTR_BTRFS_PREFIX "btrfs."
#define XATTR_BTRFS_PREFIX_LEN (sizeof(XATTR_BTRFS_PREFIX) - 1)
+/*
+ * Defined as synonyms in attr/xattr.h
+ */
+#ifndef ENOATTR
+#define ENOATTR ENODATA
+#endif
static int prop_read_only(enum prop_object_type type,
const char *object,
fd = open(object, O_RDONLY);
if (fd < 0) {
ret = -errno;
- fprintf(stderr, "ERROR: open %s failed. %s\n",
- object, strerror(-ret));
+ error("failed to open %s: %s", object, strerror(-ret));
goto out;
}
ret = ioctl(fd, BTRFS_IOC_SUBVOL_GETFLAGS, &flags);
if (ret < 0) {
ret = -errno;
- fprintf(stderr, "ERROR: failed to get flags for %s. %s\n",
- object, strerror(-ret));
+ error("failed to get flags for %s: %s", object,
+ strerror(-ret));
goto out;
}
flags = flags & ~BTRFS_SUBVOL_RDONLY;
} else {
ret = -EINVAL;
- fprintf(stderr, "ERROR: invalid value for property.\n");
+ error("invalid value for property: %s", value);
goto out;
}
ret = ioctl(fd, BTRFS_IOC_SUBVOL_SETFLAGS, &flags);
if (ret < 0) {
ret = -errno;
- fprintf(stderr, "ERROR: failed to set flags for %s. %s\n",
- object, strerror(-ret));
+ error("failed to set flags for %s: %s", object,
+ strerror(-ret));
goto out;
}
DIR *dirstream = NULL;
char *buf = NULL;
char *xattr_name = NULL;
+ int open_flags = value ? O_RDWR : O_RDONLY;
- fd = open_file_or_dir(object, &dirstream);
+ fd = open_file_or_dir3(object, &dirstream, open_flags);
if (fd == -1) {
ret = -errno;
- fprintf(stderr, "ERROR: open %s failed. %s\n",
- object, strerror(-ret));
+ error("failed to open %s: %s", object, strerror(-ret));
goto out;
}
- xattr_name = malloc(XATTR_BTRFS_PREFIX_LEN + strlen(name));
+ xattr_name = malloc(XATTR_BTRFS_PREFIX_LEN + strlen(name) + 1);
if (!xattr_name) {
ret = -ENOMEM;
goto out;
}
memcpy(xattr_name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN);
memcpy(xattr_name + XATTR_BTRFS_PREFIX_LEN, name, strlen(name));
+ xattr_name[XATTR_BTRFS_PREFIX_LEN + strlen(name)] = '\0';
- if (value)
+ if (value) {
+ if (strcmp(value, "no") == 0 || strcmp(value, "none") == 0)
+ value = "";
sret = fsetxattr(fd, xattr_name, value, strlen(value), 0);
- else
+ } else {
sret = fgetxattr(fd, xattr_name, NULL, 0);
+ }
if (sret < 0) {
ret = -errno;
if (ret != -ENOATTR)
- fprintf(stderr,
- "ERROR: failed to %s compression for %s. %s\n",
- value ? "set" : "get", object, strerror(-ret));
+ error("failed to %s compression for %s: %s",
+ value ? "set" : "get", object, strerror(-ret));
else
ret = 0;
goto out;
sret = fgetxattr(fd, xattr_name, buf, len);
if (sret < 0) {
ret = -errno;
- fprintf(stderr,
- "ERROR: failed to get compression for %s. %s\n",
- object, strerror(-ret));
+ error("failed to get compression for %s: %s",
+ object, strerror(-ret));
goto out;
}
fprintf(stdout, "compression=%.*s\n", (int)len, buf);
return ret;
}
-
const struct prop_handler prop_handlers[] = {
{"ro", "Set/get read-only flag of subvolume.", 0, prop_object_subvol,
prop_read_only},
prop_object_dev | prop_object_root, prop_label},
{"compression", "Set/get compression for a file or directory", 0,
prop_object_inode, prop_compression},
- {0, 0, 0, 0, 0}
+ {NULL, NULL, 0, 0, NULL}
};