diff options
Diffstat (limited to 'src/sysfs-show.c')
| -rw-r--r-- | src/sysfs-show.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/sysfs-show.c b/src/sysfs-show.c new file mode 100644 index 0000000000..d12d3ccfc9 --- /dev/null +++ b/src/sysfs-show.c @@ -0,0 +1,191 @@ +/*-*- 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 bool device_has_tag(struct udev_device *d, const char *tag) { + struct udev_list_entry *first, *item; + + assert(d); + assert(tag); + + /* FIXME */ + udev_device_get_is_initialized(d); + + first = udev_device_get_tags_list_entry(d); + udev_list_entry_foreach(item, first) + if (streq(udev_list_entry_get_name(item), tag)) + return true; + + return false; +} + +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, *id, *name, *sysfs, *subsystem, *sysname; + + 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) || !device_has_tag(d, "seat")) { + udev_device_unref(d); + *item = udev_list_entry_get_next(*item); + continue; + } + + id = udev_device_get_property_value(d, "ID_FOR_SEAT"); + 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) && device_has_tag(d, "seat"); + udev_device_unref(lookahead_d); + + if (found) + break; + } + } + + lookahead = udev_list_entry_get_next(lookahead); + } + + printf("%s%s %s (%s:%s)", prefix, lookahead ? "\342\224\234" : "\342\224\224", id ? id : sysfs, subsystem, sysname); + + if (name) + printf(" \"%s\"\n", name); + else + printf("\n"); + + *item = next; + if (*item) { + char *p; + + p = strappend(prefix, lookahead ? "\342\224\202 " : " "); + show_sysfs_one(udev, seat, item, sysfs, p, 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"); + + 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; +} |