login: move seat udev rules to login subdir

[elogind.git] / src / login / sysfs-show.c

diff --git a/src/login/sysfs-show.c b/src/login/sysfs-show.c
new file mode 100644 (file)
index 0000000..b8b356d
--- /dev/null
+++ b/src/login/sysfs-show.c
@@ -0,0 +1,187 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <string.h>
+#include <libudev.h>
+
+#include "util.h"
+#include "sysfs-show.h"
+
+static int show_sysfs_one(
+                struct udev *udev,
+                const char *seat,
+                struct udev_list_entry **item,
+                const char *sub,
+                const char *prefix,
+                unsigned n_columns) {
+
+        assert(udev);
+        assert(seat);
+        assert(item);
+        assert(prefix);
+
+        while (*item) {
+                struct udev_list_entry *next, *lookahead;
+                struct udev_device *d;
+                const char *sn, *name, *sysfs, *subsystem, *sysname;
+                char *l, *k;
+
+                sysfs = udev_list_entry_get_name(*item);
+                if (!path_startswith(sysfs, sub))
+                        return 0;
+
+                d = udev_device_new_from_syspath(udev, sysfs);
+                if (!d) {
+                        *item = udev_list_entry_get_next(*item);
+                        continue;
+                }
+
+                sn = udev_device_get_property_value(d, "ID_SEAT");
+                if (isempty(sn))
+                        sn = "seat0";
+
+                /* fixme, also check for tag 'seat' here */
+                if (!streq(seat, sn) || !udev_device_has_tag(d, "seat")) {
+                        udev_device_unref(d);
+                        *item = udev_list_entry_get_next(*item);
+                        continue;
+                }
+
+                name = udev_device_get_sysattr_value(d, "name");
+                if (!name)
+                        name = udev_device_get_sysattr_value(d, "id");
+                subsystem = udev_device_get_subsystem(d);
+                sysname = udev_device_get_sysname(d);
+
+                /* Look if there's more coming after this */
+                lookahead = next = udev_list_entry_get_next(*item);
+                while (lookahead) {
+                        const char *lookahead_sysfs;
+
+                        lookahead_sysfs = udev_list_entry_get_name(lookahead);
+
+                        if (path_startswith(lookahead_sysfs, sub) &&
+                            !path_startswith(lookahead_sysfs, sysfs)) {
+                                struct udev_device *lookahead_d;
+
+                                lookahead_d = udev_device_new_from_syspath(udev, lookahead_sysfs);
+                                if (lookahead_d) {
+                                        const char *lookahead_sn;
+                                        bool found;
+
+                                        lookahead_sn = udev_device_get_property_value(d, "ID_SEAT");
+                                        if (isempty(lookahead_sn))
+                                                lookahead_sn = "seat0";
+
+                                        found = streq(seat, lookahead_sn) && udev_device_has_tag(lookahead_d, "seat");
+                                        udev_device_unref(lookahead_d);
+
+                                        if (found)
+                                                break;
+                                }
+                        }
+
+                        lookahead = udev_list_entry_get_next(lookahead);
+                }
+
+                k = ellipsize(sysfs, n_columns, 20);
+                printf("%s%s %s\n", prefix, lookahead ? "\342\224\234" : "\342\224\224", k ? k : sysfs);
+                free(k);
+
+                if (asprintf(&l,
+                             "(%s:%s)%s%s%s",
+                             subsystem, sysname,
+                             name ? " \"" : "", name ? name : "", name ? "\"" : "") < 0) {
+                        udev_device_unref(d);
+                        return -ENOMEM;
+                }
+
+                k = ellipsize(l, n_columns, 70);
+                printf("%s%s %s\n", prefix, lookahead ? "\342\224\202" : " ", k ? k : l);
+                free(k);
+                free(l);
+
+                *item = next;
+                if (*item) {
+                        char *p;
+
+                        p = strappend(prefix, lookahead ? "\342\224\202 " : "  ");
+                        show_sysfs_one(udev, seat, item, sysfs, p ? p : prefix, n_columns - 2);
+                        free(p);
+                }
+
+                udev_device_unref(d);
+        }
+
+        return 0;
+}
+
+int show_sysfs(const char *seat, const char *prefix, unsigned n_columns) {
+        struct udev *udev;
+        struct udev_list_entry *first = NULL;
+        struct udev_enumerate *e;
+        int r;
+
+        if (n_columns <= 0)
+                n_columns = columns();
+
+        if (!prefix)
+                prefix = "";
+
+        if (isempty(seat))
+                seat = "seat0";
+
+        udev = udev_new();
+        if (!udev)
+                return -ENOMEM;
+
+        e = udev_enumerate_new(udev);
+        if (!e) {
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        if (!streq(seat, "seat0"))
+                r = udev_enumerate_add_match_tag(e, seat);
+        else
+                r = udev_enumerate_add_match_tag(e, "seat");
+
+        if (r < 0)
+                goto finish;
+
+        r = udev_enumerate_scan_devices(e);
+        if (r < 0)
+                goto finish;
+
+        first = udev_enumerate_get_list_entry(e);
+        if (first)
+                show_sysfs_one(udev, seat, &first, "/", prefix, n_columns);
+
+finish:
+        if (e)
+                udev_enumerate_unref(e);
+
+        if (udev)
+                udev_unref(udev);
+
+        return r;
+}