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vmspawn: print a helpful message when we start the VM

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Let people know how they can exit the VM, it's not obvious after all.
This commit is contained in:
Lennart Poettering 2024-01-19 19:32:36 +01:00
parent 71e42c36d0
commit dbb2718f92
1 changed files with 13 additions and 1 deletions
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14
src/vmspawn/vmspawn.c
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@ -36,6 +36,7 @@
#include "vmspawn-settings.h"
#include "vmspawn-util.h"
static bool arg_quiet = false;
static PagerFlags arg_pager_flags = 0;
static char *arg_image = NULL;
static char *arg_machine = NULL;
@ -72,6 +73,7 @@ static int help(void) {
"%5$sSpawn a command or OS in a virtual machine.%6$s\n\n"
" -h --help Show this help\n"
" --version Print version string\n"
" -q --quiet Do not show status information\n"
" --no-pager Do not pipe output into a pager\n"
"\n%3$sImage:%4$s\n"
" -i --image=PATH Root file system disk image (or device node) for\n"
@ -124,6 +126,7 @@ static int parse_argv(int argc, char *argv[]) {
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "quiet", no_argument, NULL, 'q' },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
{ "image", required_argument, NULL, 'i' },
{ "machine", required_argument, NULL, 'M' },
@ -146,7 +149,7 @@ static int parse_argv(int argc, char *argv[]) {
assert(argv);
optind = 0;
while ((c = getopt_long(argc, argv, "+hi:M", options, NULL)) >= 0)
while ((c = getopt_long(argc, argv, "+hi:Mq", options, NULL)) >= 0)
switch (c) {
case 'h':
return help();
@ -154,6 +157,10 @@ static int parse_argv(int argc, char *argv[]) {
case ARG_VERSION:
return version();
case 'q':
arg_quiet = true;
break;
case 'i':
r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_image);
if (r < 0)
@ -804,6 +811,11 @@ static int run(int argc, char *argv[]) {
if (r < 0)
return r;
if (!arg_quiet)
log_info("Spawning VM %s on %s.\n"
"Press Ctrl-a x to kill VM.",
arg_machine, arg_image);
assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
return run_virtual_machine();