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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "common-signal.h"
#include "fd-util.h"
#include "fileio.h"
#include "process-util.h"
#include "signal-util.h"
int sigrtmin18_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
struct sigrtmin18_info *info = userdata;
_cleanup_free_ char *comm = NULL;
int r;
assert(s);
assert(si);
(void) get_process_comm(si->ssi_pid, &comm);
if (si->ssi_code != SI_QUEUE) {
log_notice("Received control signal %s from process " PID_FMT " (%s) without command value, ignoring.",
signal_to_string(si->ssi_signo),
(pid_t) si->ssi_pid,
strna(comm));
return 0;
}
log_debug("Received control signal %s from process " PID_FMT " (%s) with command 0x%08x.",
signal_to_string(si->ssi_signo),
(pid_t) si->ssi_pid,
strna(comm),
(unsigned) si->ssi_int);
switch (si->ssi_int) {
case _COMMON_SIGNAL_COMMAND_LOG_LEVEL_BASE..._COMMON_SIGNAL_COMMAND_LOG_LEVEL_END:
log_set_max_level(si->ssi_int - _COMMON_SIGNAL_COMMAND_LOG_LEVEL_BASE);
break;
case COMMON_SIGNAL_COMMAND_CONSOLE:
log_set_target_and_open(LOG_TARGET_CONSOLE);
break;
case COMMON_SIGNAL_COMMAND_JOURNAL:
log_set_target_and_open(LOG_TARGET_JOURNAL);
break;
case COMMON_SIGNAL_COMMAND_KMSG:
log_set_target_and_open(LOG_TARGET_KMSG);
break;
case COMMON_SIGNAL_COMMAND_NULL:
log_set_target_and_open(LOG_TARGET_NULL);
break;
case COMMON_SIGNAL_COMMAND_MEMORY_PRESSURE:
if (info && info->memory_pressure_handler)
return info->memory_pressure_handler(s, info->memory_pressure_userdata);
sd_event_trim_memory();
break;
case COMMON_SIGNAL_COMMAND_MALLOC_INFO: {
_cleanup_free_ char *data = NULL;
_cleanup_fclose_ FILE *f = NULL;
size_t sz;
f = open_memstream_unlocked(&data, &sz);
if (!f) {
log_oom();
break;
}
if (malloc_info(0, f) < 0) {
log_error_errno(errno, "Failed to invoke malloc_info(): %m");
break;
}
fputc(0, f);
r = fflush_and_check(f);
if (r < 0) {
log_error_errno(r, "Failed to flush malloc_info() buffer: %m");
break;
}
log_dump(LOG_INFO, data);
break;
}
default:
log_notice("Received control signal %s with unknown command 0x%08x, ignoring.",
signal_to_string(si->ssi_signo), (unsigned) si->ssi_int);
break;
}
return 0;
}
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