diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile.am | 20 | ||||
| -rw-r--r-- | configure.ac | 9 | ||||
| -rw-r--r-- | rules/99-systemd.rules.in | 4 | ||||
| l--------- | rules/Makefile | 1 | ||||
| l--------- | src/backlight/Makefile | 1 | ||||
| -rw-r--r-- | src/backlight/backlight.c | 126 | ||||
| -rw-r--r-- | units/.gitignore | 1 | ||||
| -rw-r--r-- | units/systemd-backlight@.service.in | 21 |
9 files changed, 184 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore index dc5d735f0..61bc2a349 100644 --- a/.gitignore +++ b/.gitignore @@ -29,6 +29,7 @@ /systemd-ac-power /systemd-analyze /systemd-ask-password +/systemd-backlight /systemd-binfmt /systemd-bootchart /systemd-cat diff --git a/Makefile.am b/Makefile.am index c19d59612..fa4fea95e 100644 --- a/Makefile.am +++ b/Makefile.am @@ -3314,6 +3314,26 @@ EXTRA_DIST += \ units/systemd-random-seed.service.in # ------------------------------------------------------------------------------ +if ENABLE_BACKLIGHT +rootlibexec_PROGRAMS += \ + systemd-backlight + +nodist_systemunit_DATA += \ + units/systemd-backlight@.service + +systemd_backlight_SOURCES = \ + src/backlight/backlight.c + +systemd_backlight_LDADD = \ + libsystemd-label.la \ + libsystemd-shared.la \ + libudev-private.la +endif + +EXTRA_DIST += \ + units/systemd-backlight@.service.in + +# ------------------------------------------------------------------------------ if HAVE_LIBCRYPTSETUP rootlibexec_PROGRAMS += \ systemd-cryptsetup diff --git a/configure.ac b/configure.ac index 0ecc71632..6ef6382c4 100644 --- a/configure.ac +++ b/configure.ac @@ -671,6 +671,14 @@ fi AM_CONDITIONAL(ENABLE_RANDOMSEED, [test "$have_randomseed" = "yes"]) # ------------------------------------------------------------------------------ +have_backlight=no +AC_ARG_ENABLE(backlight, AS_HELP_STRING([--disable-backlight], [disable backlight tools])) +if test "x$enable_backlight" != "xno"; then + have_backlight=yes +fi +AM_CONDITIONAL(ENABLE_BACKLIGHT, [test "$have_backlight" = "yes"]) + +# ------------------------------------------------------------------------------ have_logind=no AC_ARG_ENABLE(logind, AS_HELP_STRING([--disable-logind], [disable login daemon])) if test "x$enable_logind" != "xno"; then @@ -1001,6 +1009,7 @@ AC_MSG_RESULT([ quotacheck: ${have_quotacheck} tmpfiles: ${have_tmpfiles} randomseed: ${have_randomseed} + backlight: ${have_backlight} logind: ${have_logind} machined: ${have_machined} hostnamed: ${have_hostnamed} diff --git a/rules/99-systemd.rules.in b/rules/99-systemd.rules.in index e9b2da7b3..ac4bc86c8 100644 --- a/rules/99-systemd.rules.in +++ b/rules/99-systemd.rules.in @@ -51,6 +51,10 @@ SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ENV{ID_USB_INTERFACES}=="*:0701??: ACTION=="add", SUBSYSTEM=="net", KERNEL!="lo", RUN+="@rootlibexecdir@/systemd-sysctl --prefix=/proc/sys/net/ipv4/conf/$name --prefix=/proc/sys/net/ipv4/neigh/$name --prefix=/proc/sys/net/ipv6/conf/$name --prefix=/proc/sys/net/ipv6/neigh/$name" +# Pull in backlight save/restore for all firmware backlight devices + +ACTION=="add", SUBSYSTEM=="backlight", ATTR{type}=="firmware", TAG+="systemd", ENV{SYSTEMD_WANTS}+="systemd-backlight@sys%p.service" + # Asynchronously mount file systems implemented by these modules as # soon as they are loaded. diff --git a/rules/Makefile b/rules/Makefile new file mode 120000 index 000000000..bd1047548 --- /dev/null +++ b/rules/Makefile @@ -0,0 +1 @@ +../src/Makefile
\ No newline at end of file diff --git a/src/backlight/Makefile b/src/backlight/Makefile new file mode 120000 index 000000000..d0b0e8e00 --- /dev/null +++ b/src/backlight/Makefile @@ -0,0 +1 @@ +../Makefile
\ No newline at end of file diff --git a/src/backlight/backlight.c b/src/backlight/backlight.c new file mode 100644 index 000000000..3378907f9 --- /dev/null +++ b/src/backlight/backlight.c @@ -0,0 +1,126 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2013 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <libudev.h> + +#include "util.h" +#include "mkdir.h" +#include "fileio.h" + +int main(int argc, char *argv[]) { + struct udev *udev = NULL; + struct udev_device *device = NULL; + _cleanup_free_ char *saved = NULL; + int r; + + if (argc != 3) { + log_error("This program requires two arguments."); + return EXIT_FAILURE; + } + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + umask(0022); + + r = mkdir_p("/var/lib/backlight", 0755); + if (r < 0) { + log_error("Failed to create backlight directory: %s", strerror(-r)); + goto finish; + } + + udev = udev_new(); + if (!udev) { + r = log_oom(); + goto finish; + } + + device = udev_device_new_from_syspath(udev, argv[2]); + if (!device) { + r = log_oom(); + goto finish; + } + + if (!streq_ptr(udev_device_get_subsystem(device), "backlight")) { + log_error("Not a backlight device: %s", argv[2]); + r = -ENODEV; + goto finish; + } + + saved = strappend("/var/lib/backlight/", udev_device_get_sysname(device)); + if (!saved) { + r = log_oom(); + goto finish; + } + + if (streq(argv[1], "load")) { + _cleanup_free_ char *value = NULL; + + r = read_one_line_file(saved, &value); + if (r < 0) { + + if (r == -ENOENT) { + r = 0; + goto finish; + } + + log_error("Failed to read %s: %s", saved, strerror(-r)); + goto finish; + } + + r = udev_device_set_sysattr_value(device, "brightness", value); + if (r < 0) { + log_error("Failed to write system attribute: %s", strerror(-r)); + goto finish; + } + + } else if (streq(argv[1], "save")) { + const char *value; + + value = udev_device_get_sysattr_value(device, "brightness"); + if (!value) { + log_error("Failed to read system attribute: %s", strerror(-r)); + goto finish; + } + + r = write_string_file(saved, value); + if (r < 0) { + log_error("Failed to write %s: %s", saved, strerror(-r)); + goto finish; + } + + } else { + log_error("Unknown verb %s.", argv[1]); + r = -EINVAL; + goto finish; + } + +finish: + if (device) + udev_device_unref(device); + + if (udev) + udev_unref(udev); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; + +} diff --git a/units/.gitignore b/units/.gitignore index 9aee00f2a..9c65075c0 100644 --- a/units/.gitignore +++ b/units/.gitignore @@ -1,3 +1,4 @@ +/systemd-backlight@.service /halt-local.service /rc-local.service /systemd-hybrid-sleep.service diff --git a/units/systemd-backlight@.service.in b/units/systemd-backlight@.service.in new file mode 100644 index 000000000..14b12198e --- /dev/null +++ b/units/systemd-backlight@.service.in @@ -0,0 +1,21 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. + +[Unit] +Description=Load/Save Screen Backlight Brightness of %f +Documentation=man:systemd-backlight@.service(8) +DefaultDependencies=no +RequiresMountsFor=/var/lib/backlight +Conflicts=shutdown.target +After=systemd-readahead-collect.service systemd-readahead-replay.service systemd-remount-fs.service +Before=sysinit.target shutdown.target + +[Service] +Type=oneshot +RemainAfterExit=yes +ExecStart=@rootlibexecdir@/systemd-backlight load %f +ExecStop=@rootlibexecdir@/systemd-backlight save %f |