Some completers for libvirt related tools might want to list domain IDs only. Just like the one I've implemented for virt-viewer [1]. I've worked around it using some awk magic, but if it was possible to just 'virsh list --id' then I could drop awk. 1: https://www.redhat.com/archives/virt-tools-list/2019-May/msg00014.html Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- Diff to v1: - Documented the new switch in the manpage - Allowed --id to be used with --all docs/manpages/virsh.rst | 21 +++++++++--------- tools/virsh-domain-monitor.c | 42 +++++++++++++++++++++++++----------- 2 files changed, 39 insertions(+), 24 deletions(-) diff --git a/docs/manpages/virsh.rst b/docs/manpages/virsh.rst index d34a1c8684..848e1a6458 100644 --- a/docs/manpages/virsh.rst +++ b/docs/manpages/virsh.rst @@ -621,7 +621,7 @@ list list [--inactive | --all] [--managed-save] [--title] - { [--table] | --name | --uuid } + { [--table] | --name | --uuid | --id } [--persistent] [--transient] [--with-managed-save] [--without-managed-save] [--autostart] [--no-autostart] @@ -758,16 +758,15 @@ If *--managed-save* is specified, then domains that have managed save state in the listing. This flag is usable only with the default *--table* output. Note that this flag does not filter the list of domains. -If *--name* is specified, domain names are printed instead of the table -formatted one per line. If *--uuid* is specified domain's UUID's are printed -instead of names. Flag *--table* specifies that the legacy table-formatted -output should be used. This is the default. - -If both *--name* and *--uuid* are specified, domain UUID's and names -are printed side by side without any header. Flag *--table* specifies -that the legacy table-formatted output should be used. This is the -default if neither *--name* nor *--uuid* are specified. Option -*--table* is mutually exclusive with options *--uuid* and *--name*. +If *--name* is specified, domain names are printed instead of the +table formatted one per line. If *--uuid* is specified domain's UUID's +are printed instead of names. If *--id* is specified then domain's ID's +are printed indead of names. However, it is possible to combine +*--name*, *--uuid* and *--id* to select only desired fields for +printing. Flag *--table* specifies that the legacy table-formatted +output should be used, but it is mutually exclusive with *--name*, +*--uuid* and *--id*. This is the default and will be used if neither of +*--name*, *--uuid* or *--id* is specified. If *--title* is specified, then the short domain description (title) is printed in an extra column. This flag is usable only with the default diff --git a/tools/virsh-domain-monitor.c b/tools/virsh-domain-monitor.c index e0491d48ac..5d0a03afa9 100644 --- a/tools/virsh-domain-monitor.c +++ b/tools/virsh-domain-monitor.c @@ -1919,6 +1919,10 @@ static const vshCmdOptDef opts_list[] = { .type = VSH_OT_BOOL, .help = N_("list domain names only") }, + {.name = "id", + .type = VSH_OT_BOOL, + .help = N_("list domain IDs only") + }, {.name = "table", .type = VSH_OT_BOOL, .help = N_("list table (default)") @@ -1945,6 +1949,7 @@ cmdList(vshControl *ctl, const vshCmd *cmd) bool optTable = vshCommandOptBool(cmd, "table"); bool optUUID = vshCommandOptBool(cmd, "uuid"); bool optName = vshCommandOptBool(cmd, "name"); + bool optID = vshCommandOptBool(cmd, "id"); size_t i; char *title; char uuid[VIR_UUID_STRING_BUFLEN]; @@ -1988,8 +1993,9 @@ cmdList(vshControl *ctl, const vshCmd *cmd) VSH_EXCLUSIVE_OPTIONS("table", "name"); VSH_EXCLUSIVE_OPTIONS("table", "uuid"); + VSH_EXCLUSIVE_OPTIONS("table", "id"); - if (!optUUID && !optName) + if (!optUUID && !optName && !optID) optTable = true; if (!(list = virshDomainListCollect(ctl, flags))) @@ -2007,6 +2013,8 @@ cmdList(vshControl *ctl, const vshCmd *cmd) } for (i = 0; i < list->ndomains; i++) { + const char *sep = ""; + dom = list->domains[i]; id = virDomainGetID(dom); if (id != (unsigned int) -1) @@ -2044,20 +2052,28 @@ cmdList(vshControl *ctl, const vshCmd *cmd) goto cleanup; } - } else if (optUUID && optName) { - if (virDomainGetUUIDString(dom, uuid) < 0) { - vshError(ctl, "%s", _("Failed to get domain's UUID")); - goto cleanup; + } else { + if (optUUID) { + if (virDomainGetUUIDString(dom, uuid) < 0) { + vshError(ctl, "%s", _("Failed to get domain's UUID")); + goto cleanup; + } + vshPrint(ctl, "%s", uuid); + sep = " "; } - vshPrint(ctl, "%-36s %-30s\n", uuid, virDomainGetName(dom)); - } else if (optUUID) { - if (virDomainGetUUIDString(dom, uuid) < 0) { - vshError(ctl, "%s", _("Failed to get domain's UUID")); - goto cleanup; + if (optID) { + /* If we are asked to print IDs only then do that + * only for live domains. */ + if (id == (unsigned int) -1 && !optUUID && !optName) + continue; + vshPrint(ctl, "%s%s", sep, id_buf); + sep = " "; } - vshPrint(ctl, "%s\n", uuid); - } else if (optName) { - vshPrint(ctl, "%s\n", virDomainGetName(dom)); + if (optName) { + vshPrint(ctl, "%s%s", sep, virDomainGetName(dom)); + sep = " "; + } + vshPrint(ctl, "\n"); } } -- 2.26.2