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99 lines
2.4 KiB
99 lines
2.4 KiB
4 months ago
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/* getfattr.c - Read POSIX extended attributes.
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*
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* Copyright 2016 Android Open Source Project.
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*
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* No standard
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USE_GETFATTR(NEWTOY(getfattr, "(only-values)dhn:", TOYFLAG_USR|TOYFLAG_BIN))
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config GETFATTR
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bool "getfattr"
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default n
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help
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usage: getfattr [-d] [-h] [-n NAME] FILE...
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Read POSIX extended attributes.
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-d Show values as well as names
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-h Do not dereference symbolic links
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-n Show only attributes with the given name
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--only-values Don't show names
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*/
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#define FOR_getfattr
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#include "toys.h"
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GLOBALS(
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char *n;
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)
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// TODO: factor out the lister and getter loops and use them in cp too.
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static void do_getfattr(char *file)
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{
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ssize_t (*getter)(const char *, const char *, void *, size_t) = getxattr;
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ssize_t (*lister)(const char *, char *, size_t) = listxattr;
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char **sorted_keys;
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ssize_t keys_len;
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char *keys, *key;
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int i, key_count;
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if (FLAG(h)) {
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getter = lgetxattr;
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lister = llistxattr;
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}
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// Collect the keys.
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while ((keys_len = lister(file, NULL, 0))) {
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if (keys_len == -1) perror_msg("listxattr failed");
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keys = xmalloc(keys_len);
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if (lister(file, keys, keys_len) == keys_len) break;
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free(keys);
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}
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if (keys_len == 0) return;
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// Sort the keys.
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for (key = keys, key_count = 0; key-keys < keys_len; key += strlen(key)+1)
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key_count++;
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sorted_keys = xmalloc(key_count * sizeof(char *));
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for (key = keys, i = 0; key-keys < keys_len; key += strlen(key)+1)
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sorted_keys[i++] = key;
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qsort(sorted_keys, key_count, sizeof(char *), qstrcmp);
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if (!FLAG(only_values)) printf("# file: %s\n", file);
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for (i = 0; i < key_count; i++) {
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key = sorted_keys[i];
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if (TT.n && strcmp(TT.n, key)) continue;
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if (FLAG(d) || FLAG(only_values)) {
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ssize_t value_len;
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char *value = NULL;
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while ((value_len = getter(file, key, NULL, 0))) {
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if (value_len == -1) perror_msg("getxattr failed");
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value = xzalloc(value_len+1);
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if (getter(file, key, value, value_len) == value_len) break;
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free(value);
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}
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if (FLAG(only_values)) {
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if (value) printf("%s", value);
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} else if (!value) puts(key);
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else printf("%s=\"%s\"\n", key, value);
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free(value);
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} else puts(key); // Just list names.
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}
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if (!FLAG(only_values)) xputc('\n');
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free(sorted_keys);
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}
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void getfattr_main(void)
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{
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char **s;
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for (s=toys.optargs; *s; s++) do_getfattr(*s);
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}
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