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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/oom/oomctl.c | |
parent | Initial commit. (diff) | |
download | systemd-upstream.tar.xz systemd-upstream.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/oom/oomctl.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/oom/oomctl.c b/src/oom/oomctl.c new file mode 100644 index 0000000..2ffb9d4 --- /dev/null +++ b/src/oom/oomctl.c @@ -0,0 +1,139 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <getopt.h> +#include <unistd.h> + +#include "bus-error.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 = -1; + 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 = sd_bus_call_method( + bus, + "org.freedesktop.oom1", + "/org/freedesktop/oom1", + "org.freedesktop.oom1.Manager", + "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_show_color(true); + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + return dispatch_verb(argc, argv, verbs, NULL); +} + +DEFINE_MAIN_FUNCTION(run); |