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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <getopt.h>
#include <unistd.h>
#include "build.h"
#include "bus-error.h"
#include "bus-locator.h"
#include "copy.h"
#include "main-func.h"
#include "pretty-print.h"
#include "terminal-util.h"
#include "verbs.h"
static PagerFlags arg_pager_flags = 0;
static int help(int argc, char *argv[], void *userdata) {
_cleanup_free_ char *link = NULL;
int r;
pager_open(arg_pager_flags);
r = terminal_urlify_man("oomctl", "1", &link);
if (r < 0)
return log_oom();
printf("%1$s [OPTIONS...] COMMAND ...\n\n"
"%2$sManage or inspect the userspace OOM killer.%3$s\n"
"\n%4$sCommands:%5$s\n"
" dump Output the current state of systemd-oomd\n"
"\n%4$sOptions:%5$s\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --no-pager Do not pipe output into a pager\n"
"\nSee the %6$s for details.\n",
program_invocation_short_name,
ansi_highlight(),
ansi_normal(),
ansi_underline(),
ansi_normal(),
link);
return 0;
}
static int dump_state(int argc, char *argv[], void *userdata) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int fd = -EBADF;
int r;
r = sd_bus_open_system(&bus);
if (r < 0)
return log_error_errno(r, "Failed to connect system bus: %m");
pager_open(arg_pager_flags);
r = bus_call_method(bus, bus_oom_mgr, "DumpByFileDescriptor", &error, &reply, NULL);
if (r < 0)
return log_error_errno(r, "Failed to dump context: %s", bus_error_message(&error, r));
r = sd_bus_message_read(reply, "h", &fd);
if (r < 0)
return bus_log_parse_error(r);
fflush(stdout);
return copy_bytes(fd, STDOUT_FILENO, UINT64_MAX, 0);
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_NO_PAGER,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
{}
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
switch (c) {
case 'h':
return help(0, NULL, NULL);
case ARG_VERSION:
return version();
case ARG_NO_PAGER:
arg_pager_flags |= PAGER_DISABLE;
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
return 1;
}
static int run(int argc, char* argv[]) {
static const Verb verbs[] = {
{ "help", VERB_ANY, VERB_ANY, 0, help },
{ "dump", VERB_ANY, 1, VERB_DEFAULT, dump_state },
{}
};
int r;
log_setup();
r = parse_argv(argc, argv);
if (r <= 0)
return r;
return dispatch_verb(argc, argv, verbs, NULL);
}
DEFINE_MAIN_FUNCTION(run);
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