src/analyze/analyze-capability.c

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include "analyze.h"
#include "analyze-capability.h"
#include "cap-list.h"
#include "capability-util.h"
#include "format-table.h"

int verb_capabilities(int argc, char *argv[], void *userdata) {
        _cleanup_(table_unrefp) Table *table = NULL;
        unsigned last_cap;
        int r;

        table = table_new("name", "number");
        if (!table)
                return log_oom();

        (void) table_set_align_percent(table, table_get_cell(table, 0, 1), 100);

        /* Determine the maximum of the last cap known by the kernel and by us */
        last_cap = MAX((unsigned) CAP_LAST_CAP, cap_last_cap());

        if (strv_isempty(strv_skip(argv, 1)))
                for (unsigned c = 0; c <= last_cap; c++) {
                        r = table_add_many(table,
                                           TABLE_STRING, capability_to_name(c) ?: "cap_???",
                                           TABLE_UINT, c);
                        if (r < 0)
                                return table_log_add_error(r);
                }
        else {
                for (int i = 1; i < argc; i++) {
                        int c;

                        c = capability_from_name(argv[i]);
                        if (c < 0 || (unsigned) c > last_cap)
                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Capability \"%s\" not known.", argv[i]);

                        r = table_add_many(table,
                                           TABLE_STRING, capability_to_name(c) ?: "cap_???",
                                           TABLE_UINT, (unsigned) c);
                        if (r < 0)
                                return table_log_add_error(r);
                }

                (void) table_set_sort(table, (size_t) 1);
        }

        pager_open(arg_pager_flags);

        r = table_print(table, NULL);
        if (r < 0)
                return r;

        return EXIT_SUCCESS;
}