diff options
Diffstat (limited to 'src/grp-initprogs/grp-sleep/systemd-hibernate-resume')
3 files changed, 183 insertions, 0 deletions
diff --git a/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/hibernate-resume.c b/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/hibernate-resume.c new file mode 100644 index 0000000000..21df3c4461 --- /dev/null +++ b/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/hibernate-resume.c @@ -0,0 +1,82 @@ +/*** + This file is part of systemd. + + Copyright 2014 Ivan Shapovalov + + 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 <errno.h> +#include <stdio.h> +#include <sys/stat.h> + +#include "alloc-util.h" +#include "fileio.h" +#include "log.h" +#include "util.h" + +int main(int argc, char *argv[]) { + struct stat st; + const char *device; + _cleanup_free_ char *major_minor = NULL; + int r; + + if (argc != 2) { + log_error("This program expects one argument."); + return EXIT_FAILURE; + } + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + umask(0022); + + /* Refuse to run unless we are in an initrd() */ + if (!in_initrd()) + return EXIT_SUCCESS; + + device = argv[1]; + + if (stat(device, &st) < 0) { + log_error_errno(errno, "Failed to stat '%s': %m", device); + return EXIT_FAILURE; + } + + if (!S_ISBLK(st.st_mode)) { + log_error("Resume device '%s' is not a block device.", device); + return EXIT_FAILURE; + } + + if (asprintf(&major_minor, "%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0) { + log_oom(); + return EXIT_FAILURE; + } + + r = write_string_file("/sys/power/resume", major_minor, WRITE_STRING_FILE_CREATE); + if (r < 0) { + log_error_errno(r, "Failed to write '%s' to /sys/power/resume: %m", major_minor); + return EXIT_FAILURE; + } + + /* + * The write above shall not return. + * + * However, failed resume is a normal condition (may mean that there is + * no hibernation image). + */ + + log_info("Could not resume from '%s' (%s).", device, major_minor); + return EXIT_SUCCESS; +} diff --git a/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/systemd-hibernate-resume@.service.in b/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/systemd-hibernate-resume@.service.in new file mode 100644 index 0000000000..65e8eb83f1 --- /dev/null +++ b/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/systemd-hibernate-resume@.service.in @@ -0,0 +1,20 @@ +# 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=Resume from hibernation using device %f +Documentation=man:systemd-hibernate-resume@.service(8) +DefaultDependencies=no +BindsTo=%i.device +Wants=local-fs-pre.target +After=%i.device +Before=local-fs-pre.target +ConditionPathExists=/etc/initrd-release + +[Service] +Type=oneshot +ExecStart=@rootlibexecdir@/systemd-hibernate-resume %f diff --git a/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/systemd-hibernate-resume@.service.xml b/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/systemd-hibernate-resume@.service.xml new file mode 100644 index 0000000000..7d00827447 --- /dev/null +++ b/src/grp-initprogs/grp-sleep/systemd-hibernate-resume/systemd-hibernate-resume@.service.xml @@ -0,0 +1,81 @@ +<?xml version="1.0"?> +<!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> +<!-- + This file is part of systemd. + + Copyright 2014 Ivan Shapovalov + + 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/>. +--> +<refentry id="systemd-hibernate-resume@.service"> + + <refentryinfo> + <title>systemd-hibernate-resume@.service</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Ivan</firstname> + <surname>Shapovalov</surname> + <email>intelfx100@gmail.com</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>systemd-hibernate-resume@.service</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>systemd-hibernate-resume@.service</refname> + <refname>systemd-hibernate-resume</refname> + <refpurpose>Resume from hibernation</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>systemd-hibernate-resume@.service</filename></para> + <para><filename>/usr/lib/systemd/systemd-hibernate-resume</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><filename>systemd-hibernate-resume@.service</filename> + initiates the resume from hibernation. It is instantiated with the + device to resume from as the template argument.</para> + + <para><filename>systemd-hibernate-resume</filename> only supports + the in-kernel hibernation implementation, known as + <ulink url="https://www.kernel.org/doc/Documentation/power/swsusp.txt">swsusp</ulink>. + Internally, it works by writing the major:minor of specified + device node to <filename>/sys/power/resume</filename>.</para> + + <para>Failing to initiate a resume is not an error condition. It + may mean that there was no resume image (e. g. if the system has + been simply powered off and not hibernated). In such case, the + boot is ordinarily continued.</para> + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd-hibernate-resume-generator</refentrytitle><manvolnum>8</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |