Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 164 insertions, 0 deletions

diff --git a/src/login/sysfs-show.c b/src/login/sysfs-show.c
new file mode 100644
index 0000000..0a8c02a
--- /dev/null
+++ b/src/login/sysfs-show.c
@@ -0,0 +1,164 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+
+#include "sd-device.h"
+
+#include "alloc-util.h"
+#include "device-enumerator-private.h"
+#include "glyph-util.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "sysfs-show.h"
+#include "terminal-util.h"
+
+static int show_sysfs_one(
+                const char *seat,
+                sd_device **dev_list,
+                size_t *i_dev,
+                size_t n_dev,
+                const char *sub,
+                const char *prefix,
+                unsigned n_columns,
+                OutputFlags flags) {
+
+        size_t max_width;
+        int r;
+
+        assert(seat);
+        assert(dev_list);
+        assert(i_dev);
+        assert(prefix);
+
+        if (flags & OUTPUT_FULL_WIDTH)
+                max_width = SIZE_MAX;
+        else if (n_columns < 10)
+                max_width = 10;
+        else
+                max_width = n_columns;
+
+        while (*i_dev < n_dev) {
+                const char *sysfs, *sn, *name = NULL, *subsystem, *sysname;
+                _cleanup_free_ char *k = NULL, *l = NULL;
+                size_t lookahead;
+                bool is_master;
+
+                if (sd_device_get_syspath(dev_list[*i_dev], &sysfs) < 0 ||
+                    !path_startswith(sysfs, sub))
+                        return 0;
+
+                if (sd_device_get_property_value(dev_list[*i_dev], "ID_SEAT", &sn) < 0 || isempty(sn))
+                        sn = "seat0";
+
+                /* Explicitly also check for tag 'seat' here */
+                if (!streq(seat, sn) ||
+                    sd_device_has_current_tag(dev_list[*i_dev], "seat") <= 0 ||
+                    sd_device_get_subsystem(dev_list[*i_dev], &subsystem) < 0 ||
+                    sd_device_get_sysname(dev_list[*i_dev], &sysname) < 0) {
+                        (*i_dev)++;
+                        continue;
+                }
+
+                is_master = sd_device_has_current_tag(dev_list[*i_dev], "master-of-seat") > 0;
+
+                if (sd_device_get_sysattr_value(dev_list[*i_dev], "name", &name) < 0)
+                        (void) sd_device_get_sysattr_value(dev_list[*i_dev], "id", &name);
+
+                /* Look if there's more coming after this */
+                for (lookahead = *i_dev + 1; lookahead < n_dev; lookahead++) {
+                        const char *lookahead_sysfs;
+
+                        if (sd_device_get_syspath(dev_list[lookahead], &lookahead_sysfs) < 0)
+                                continue;
+
+                        if (path_startswith(lookahead_sysfs, sub) &&
+                            !path_startswith(lookahead_sysfs, sysfs)) {
+                                const char *lookahead_sn;
+
+                                if (sd_device_get_property_value(dev_list[lookahead], "ID_SEAT", &lookahead_sn) < 0 ||
+                                    isempty(lookahead_sn))
+                                        lookahead_sn = "seat0";
+
+                                if (streq(seat, lookahead_sn) && sd_device_has_current_tag(dev_list[lookahead], "seat") > 0)
+                                        break;
+                        }
+                }
+
+                k = ellipsize(sysfs, max_width, 20);
+                if (!k)
+                        return -ENOMEM;
+
+                printf("%s%s%s\n", prefix, special_glyph(lookahead < n_dev ? SPECIAL_GLYPH_TREE_BRANCH : SPECIAL_GLYPH_TREE_RIGHT), k);
+
+                if (asprintf(&l,
+                             "%s%s:%s%s%s%s",
+                             is_master ? "[MASTER] " : "",
+                             subsystem, sysname,
+                             name ? " \"" : "", strempty(name), name ? "\"" : "") < 0)
+                        return -ENOMEM;
+
+                free(k);
+                k = ellipsize(l, max_width, 70);
+                if (!k)
+                        return -ENOMEM;
+
+                printf("%s%s%s\n", prefix, lookahead < n_dev ? special_glyph(SPECIAL_GLYPH_TREE_VERTICAL) : "  ", k);
+
+                if (++(*i_dev) < n_dev) {
+                        _cleanup_free_ char *p = NULL;
+
+                        p = strjoin(prefix, lookahead < n_dev ? special_glyph(SPECIAL_GLYPH_TREE_VERTICAL) : "  ");
+                        if (!p)
+                                return -ENOMEM;
+
+                        r = show_sysfs_one(seat, dev_list, i_dev, n_dev, sysfs, p,
+                                           n_columns == UINT_MAX || n_columns < 2 ? n_columns : n_columns - 2,
+                                           flags);
+                        if (r < 0)
+                                return r;
+                }
+
+        }
+
+        return 0;
+}
+
+int show_sysfs(const char *seat, const char *prefix, unsigned n_columns, OutputFlags flags) {
+        _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
+        size_t n_dev = 0, i = 0;
+        sd_device **dev_list;
+        int r;
+
+        if (n_columns <= 0)
+                n_columns = columns();
+
+        prefix = strempty(prefix);
+
+        if (isempty(seat))
+                seat = "seat0";
+
+        r = sd_device_enumerator_new(&e);
+        if (r < 0)
+                return r;
+
+        r = sd_device_enumerator_allow_uninitialized(e);
+        if (r < 0)
+                return r;
+
+        r = sd_device_enumerator_add_match_tag(e, streq(seat, "seat0") ? "seat" : seat);
+        if (r < 0)
+                return r;
+
+        r = device_enumerator_scan_devices(e);
+        if (r < 0)
+                return r;
+
+        dev_list = device_enumerator_get_devices(e, &n_dev);
+
+        if (dev_list && n_dev > 0)
+                show_sysfs_one(seat, dev_list, &i, n_dev, "/", prefix, n_columns, flags);
+        else
+                printf("%s%s%s\n", prefix, special_glyph(SPECIAL_GLYPH_TREE_RIGHT), "(none)");
+
+        return 0;
+}