1 files changed, 122 insertions, 0 deletions
diff --git a/src/basic/cap-list.c b/src/basic/cap-list.c
new file mode 100644
index 0000000..d295a63
--- /dev/null
+++ b/src/basic/cap-list.c
@@ -0,0 +1,122 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <string.h>
+
+#include "alloc-util.h"
+#include "capability-util.h"
+#include "cap-list.h"
+#include "extract-word.h"
+#include "macro.h"
+#include "parse-util.h"
+#include "stdio-util.h"
+#include "util.h"
+
+static const struct capability_name* lookup_capability(register const char *str, register GPERF_LEN_TYPE len);
+
+#include "cap-from-name.h"
+#include "cap-to-name.h"
+
+const char *capability_to_name(int id) {
+        if (id < 0)
+                return NULL;
+
+        if ((size_t) id >= ELEMENTSOF(capability_names))
+                return NULL;
+
+        return capability_names[id];
+}
+
+int capability_from_name(const char *name) {
+        const struct capability_name *sc;
+        int r, i;
+
+        assert(name);
+
+        /* Try to parse numeric capability */
+        r = safe_atoi(name, &i);
+        if (r >= 0) {
+                if (i >= 0 && i < 64)
+                        return i;
+                else
+                        return -EINVAL;
+        }
+
+        /* Try to parse string capability */
+        sc = lookup_capability(name, strlen(name));
+        if (!sc)
+                return -EINVAL;
+
+        return sc->id;
+}
+
+/* This is the number of capability names we are *compiled* with.
+ * For the max capability number of the currently-running kernel,
+ * use cap_last_cap(). */
+int capability_list_length(void) {
+        return (int) ELEMENTSOF(capability_names);
+}
+
+int capability_set_to_string_alloc(uint64_t set, char **s) {
+        _cleanup_free_ char *str = NULL;
+        size_t allocated = 0, n = 0;
+
+        assert(s);
+
+        for (unsigned i = 0; i <= cap_last_cap(); i++)
+                if (set & (UINT64_C(1) << i)) {
+                        const char *p;
+                        char buf[2 + 16 + 1];
+                        size_t add;
+
+                        p = capability_to_name(i);
+                        if (!p) {
+                                xsprintf(buf, "0x%x", i);
+                                p = buf;
+                        }
+
+                        add = strlen(p);
+
+                        if (!GREEDY_REALLOC(str, allocated, n + add + 2))
+                                return -ENOMEM;
+
+                        strcpy(mempcpy(str + n, p, add), " ");
+                        n += add + 1;
+                }
+
+        if (!GREEDY_REALLOC(str, allocated, n + 1))
+                return -ENOMEM;
+
+        str[n > 0 ? n - 1 : 0] = '\0'; /* truncate the last space, if it's there */
+
+        *s = TAKE_PTR(str);
+
+        return 0;
+}
+
+int capability_set_from_string(const char *s, uint64_t *set) {
+        uint64_t val = 0;
+
+        assert(set);
+
+        for (const char *p = s;;) {
+                _cleanup_free_ char *word = NULL;
+                int r;
+
+                r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE);
+                if (r == -ENOMEM)
+                        return r;
+                if (r <= 0)
+                        break;
+
+                r = capability_from_name(word);
+                if (r < 0)
+                        continue;
+
+                val |= ((uint64_t) UINT64_C(1)) << (uint64_t) r;
+        }
+
+        *set = val;
+
+        return 0;
+}