diff options
| -rw-r--r-- | man/systemd-sysupdate.xml | 6 | ||||
| -rw-r--r-- | src/sysupdate/sysupdate.c | 8 |
2 files changed, 11 insertions, 3 deletions
diff --git a/man/systemd-sysupdate.xml b/man/systemd-sysupdate.xml index dffe835c04..f57a17b79a 100644 --- a/man/systemd-sysupdate.xml +++ b/man/systemd-sysupdate.xml @@ -257,9 +257,9 @@ <term><option>--instances-max=</option></term> <term><option>-m</option></term> - <listitem><para>Takes a decimal integer greater than or equal to 2. Controls how many versions to - keep at any time. This option may also be configured inside the transfer files, via the - <varname>InstancesMax=</varname> setting, see + <listitem><para>Takes a decimal integer greater than or equal to 2 while updating or 1 while vacuuming. + Controls how many versions to keep at any time. This option may also be configured inside the transfer + files, via the <varname>InstancesMax=</varname> setting, see <citerefentry><refentrytitle>sysupdate.d</refentrytitle><manvolnum>5</manvolnum></citerefentry> for details.</para> diff --git a/src/sysupdate/sysupdate.c b/src/sysupdate/sysupdate.c index dee8348bdb..5854535427 100644 --- a/src/sysupdate/sysupdate.c +++ b/src/sysupdate/sysupdate.c @@ -1067,6 +1067,10 @@ static int verb_vacuum(int argc, char **argv, void *userdata) { assert(argc <= 1); + if (arg_instances_max < 1) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "The --instances-max argument must be >= 1 while vacuuming"); + r = process_image(/* ro= */ false, &mounted_dir, &loop_device); if (r < 0) return r; @@ -1090,6 +1094,10 @@ static int verb_update(int argc, char **argv, void *userdata) { assert(argc <= 2); version = argc >= 2 ? argv[1] : NULL; + if (arg_instances_max < 2) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "The --instances-max argument must be >= 2 while updating"); + if (arg_reboot) { /* If automatic reboot on completion is requested, let's first determine the currently booted image */ |