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hib-res-generator: add "noresume"

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This is an override parameter, to totally skip dehiberanation.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2018-09-26 07:31:10 +02:00
parent a79858bfd1
commit e83419d043
3 changed files with 28 additions and 8 deletions
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5
TODO
View File

@ -86,11 +86,10 @@ Features:
1. add resume_offset support to the resume code (i.e. support swap files
properly)
2. check of swap is on weird storage and refuse if so
2. check if swap is on weird storage and refuse if so
3. add env-var based option to disable hibernation
4. figure out what to do with swap-on-luks
5. add autodetection of hibernation images, and add "noresume" to disable
this
5. add autodetection of hibernation images
* portables: introduce a new unit file directory /etc/systemd/system.attached/
or so, where we attach portable services to

14
man/systemd-hibernate-resume-generator.xml
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@ -28,11 +28,13 @@
<refsect1>
<title>Description</title>
<para><filename>systemd-hibernate-resume-generator</filename> is a
generator that instantiates
<para><command>systemd-hibernate-resume-generator</command> is a
generator that initiates the procedure to resume the system from hibernation.
It instantiates the
<citerefentry><refentrytitle>systemd-hibernate-resume@.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
unit according to the value of <option>resume=</option> parameter
specified on the kernel command line.</para>
specified on the kernel command line, which will instruct the kernel
to resume the system from the hibernation image on that device.</para>
</refsect1>
<refsect1>
@ -54,6 +56,12 @@
supported.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>noresume</varname></term>
<listitem><para>Do not try to resume from hibernation. If this parameter is
present, <varname>resume=</varname> is ignored.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>

17
src/hibernate-resume/hibernate-resume-generator.c
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@ -15,6 +15,7 @@
static const char *arg_dest = "/tmp";
static char *arg_resume_device = NULL;
static bool arg_noresume = false;
static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
@ -28,8 +29,15 @@ static int parse_proc_cmdline_item(const char *key, const char *value, void *dat
if (!s)
return log_oom();
free(arg_resume_device);
arg_resume_device = s;
free_and_replace(arg_resume_device, s);
} else if (streq(key, "noresume")) {
if (value) {
log_warning("\"noresume\" kernel command line switch specified with an argument, ignoring.");
return 0;
}
arg_noresume = true;
}
return 0;
@ -85,6 +93,11 @@ int main(int argc, char *argv[]) {
if (r < 0)
log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m");
if (arg_noresume) {
log_notice("Found \"noresume\" on the kernel command line, quitting.");
return EXIT_SUCCESS;
}
r = process_resume();
free(arg_resume_device);