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kvm tools: Improve 'kvm pause' parameters

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kvm pause now uses the git option parser to parse parameters.

Added option to pause instance by PID and pause all instances.

Improved usage message.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Sasha Levin
2011-08-12 18:20:58 +03:00
committed by Will Deacon
parent 284bbe9269
commit 477db183e8
1 changed files with 34 additions and 14 deletions
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builtin-pause.c
+34 -14
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@@ -1,22 +1,40 @@
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <kvm/util.h>
#include <kvm/kvm-cmd.h>
#include <kvm/builtin-pause.h>
#include <kvm/kvm.h>
#include <kvm/parse-options.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
static bool all;
static u64 instance_pid;
static const char *instance_name;
static const char * const pause_usage[] = {
"kvm pause <instance name>",
"kvm pause [--all] [-n name] [-p pid]",
NULL
};
static const struct option pause_options[] = {
OPT_GROUP("General options:"),
OPT_BOOLEAN('a', "all", &all, "Pause all instances"),
OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
OPT_U64('p', "pid", &instance_pid, "Instance pid"),
OPT_END()
};
static void parse_pause_options(int argc, const char **argv)
{
while (argc != 0) {
argc = parse_options(argc, argv, pause_options, pause_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc != 0)
kvm_pause_help();
}
}
void kvm_pause_help(void)
{
usage_with_options(pause_usage, pause_options);
@@ -29,18 +47,20 @@ static int do_pause(const char *name, int pid)
int kvm_cmd_pause(int argc, const char **argv, const char *prefix)
{
int pid;
parse_pause_options(argc, argv);
if (argc != 1)
if (all)
return kvm__enumerate_instances(do_pause);
if (instance_name == NULL &&
instance_pid == 0)
kvm_pause_help();
if (strcmp(argv[0], "all") == 0) {
return kvm__enumerate_instances(do_pause);
}
if (instance_name)
instance_pid = kvm__get_pid_by_instance(argv[0]);
pid = kvm__get_pid_by_instance(argv[0]);
if (pid < 0)
die("Failed locating instance name");
if (instance_pid <= 0)
die("Failed locating instance");
return kill(pid, SIGUSR2);
return kill(instance_pid, SIGUSR2);
}