static int read_usec(sd_id128_t vendor, const char *name, usec_t *u) {
_cleanup_free_ void *i = NULL;
_cleanup_free_ char *j = NULL;
size_t is;
int r;
uint64_t x;
assert(name);
assert(u);
r = efi_get_variable(EFI_VENDOR_LOADER, name, NULL, &i, &is);
if (r < 0)
return r;
j = utf16_to_utf8(i, is);
if (!j)
return -ENOMEM;
r = safe_atou64(j, &x);
if (r < 0)
return r;
*u = x;
return 0;
}
int config_parse_uint64(
const char *filename,
unsigned line,
const char *section,
const char *lvalue,
int ltype,
const char *rvalue,
void *data,
void *userdata) {
uint64_t *u = data;
int r;
assert(filename);
assert(lvalue);
assert(rvalue);
assert(data);
r = safe_atou64(rvalue, u);
if (r < 0) {
log_error("[%s:%u] Failed to parse numeric value, ignoring: %s", filename, line, rvalue);
return 0;
}
return 0;
}
static void test_safe_atou64(void) {
int r;
uint64_t l;
r = safe_atou64("12345", &l);
assert_se(r == 0);
assert_se(l == 12345);
r = safe_atou64(" 12345", &l);
assert_se(r == 0);
assert_se(l == 12345);
r = safe_atou64("18446744073709551617", &l);
assert_se(r == -ERANGE);
r = safe_atou64("-1", &l);
assert_se(r == -ERANGE);
r = safe_atou64(" -1", &l);
assert_se(r == -ERANGE);
r = safe_atou64("junk", &l);
assert_se(r == -EINVAL);
r = safe_atou64("123x", &l);
assert_se(r == -EINVAL);
}
int block_bump_request_nr(const char *p) {
struct stat st;
uint64_t u;
char *ap = NULL, *line = NULL;
int r;
dev_t d;
assert(p);
if (stat(p, &st) < 0)
return -errno;
if (major(st.st_dev) == 0)
return 0;
d = st.st_dev;
block_get_whole_disk(d, &d);
if (asprintf(&ap, "/sys/dev/block/%u:%u/queue/nr_requests", major(d), minor(d)) < 0) {
r= -ENOMEM;
goto finish;
}
r = read_one_line_file(ap, &line);
if (r < 0) {
if (r == -ENOENT)
r = 0;
goto finish;
}
r = safe_atou64(line, &u);
if (r >= 0 && u >= BUMP_REQUEST_NR) {
r = 0;
goto finish;
}
free(line);
line = NULL;
if (asprintf(&line, "%lu", (unsigned long) BUMP_REQUEST_NR) < 0) {
r = -ENOMEM;
goto finish;
}
r = write_string_file(ap, line);
if (r < 0)
goto finish;
log_info("Bumped block_nr parameter of %u:%u to %lu. This is a temporary hack and should be removed one day.", major(d), minor(d), (unsigned long) BUMP_REQUEST_NR);
r = 1;
finish:
free(ap);
free(line);
return r;
}
int timestamp_deserialize(const char *value, usec_t *timestamp) {
int r;
assert(value);
r = safe_atou64(value, timestamp);
if (r < 0)
return log_debug_errno(r, "Failed to parse timestamp value \"%s\": %m", value);
return r;
}
static int output_timestamp_monotonic(FILE *f, sd_journal *j, const char *monotonic) {
sd_id128_t boot_id;
uint64_t t;
int r;
assert(f);
assert(j);
r = -ENXIO;
if (monotonic)
r = safe_atou64(monotonic, &t);
if (r < 0)
r = sd_journal_get_monotonic_usec(j, &t, &boot_id);
if (r < 0)
return log_error_errno(r, "Failed to get monotonic timestamp: %m");
fprintf(f, "[%5"PRI_USEC".%06"PRI_USEC"]", t / USEC_PER_SEC, t % USEC_PER_SEC);
return 1 + 5 + 1 + 6 + 1;
}
int block_get_readahead(const char *p, uint64_t *bytes) {
struct stat st;
char *ap = NULL, *line = NULL;
int r;
dev_t d;
uint64_t u;
assert(p);
assert(bytes);
if (stat(p, &st) < 0)
return -errno;
if (major(st.st_dev) == 0)
return 0;
d = st.st_dev;
block_get_whole_disk(d, &d);
if (asprintf(&ap, "/sys/dev/block/%u:%u/bdi/read_ahead_kb", major(d), minor(d)) < 0) {
r = -ENOMEM;
goto finish;
}
r = read_one_line_file(ap, &line);
if (r < 0)
goto finish;
r = safe_atou64(line, &u);
if (r < 0)
goto finish;
*bytes = u * 1024ULL;
finish:
free(ap);
free(line);
return r;
}
static int output_timestamp_realtime(FILE *f, sd_journal *j, OutputMode mode, OutputFlags flags, const char *realtime) {
char buf[MAX(FORMAT_TIMESTAMP_MAX, 64)];
struct tm *(*gettime_r)(const time_t *, struct tm *);
struct tm tm;
uint64_t x;
time_t t;
int r;
assert(f);
assert(j);
if (realtime)
r = safe_atou64(realtime, &x);
if (!realtime || r < 0 || !VALID_REALTIME(x))
r = sd_journal_get_realtime_usec(j, &x);
if (r < 0)
return log_error_errno(r, "Failed to get realtime timestamp: %m");
if (IN_SET(mode, OUTPUT_SHORT_FULL, OUTPUT_WITH_UNIT)) {
const char *k;
if (flags & OUTPUT_UTC)
k = format_timestamp_utc(buf, sizeof(buf), x);
else
k = format_timestamp(buf, sizeof(buf), x);
if (!k) {
log_error("Failed to format timestamp: %"PRIu64, x);
return -EINVAL;
}
} else {
char usec[7];
gettime_r = (flags & OUTPUT_UTC) ? gmtime_r : localtime_r;
t = (time_t) (x / USEC_PER_SEC);
switch (mode) {
case OUTPUT_SHORT_UNIX:
xsprintf(buf, "%10"PRI_TIME".%06"PRIu64, t, x % USEC_PER_SEC);
break;
case OUTPUT_SHORT_ISO:
if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S%z", gettime_r(&t, &tm)) <= 0) {
log_error("Failed to format ISO time");
return -EINVAL;
}
break;
case OUTPUT_SHORT_ISO_PRECISE:
/* No usec in strftime, so we leave space and copy over */
if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S.xxxxxx%z", gettime_r(&t, &tm)) <= 0) {
log_error("Failed to format ISO-precise time");
return -EINVAL;
}
xsprintf(usec, "%06"PRI_USEC, x % USEC_PER_SEC);
memcpy(buf + 20, usec, 6);
break;
case OUTPUT_SHORT:
case OUTPUT_SHORT_PRECISE:
if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", gettime_r(&t, &tm)) <= 0) {
log_error("Failed to format syslog time");
return -EINVAL;
}
if (mode == OUTPUT_SHORT_PRECISE) {
size_t k;
assert(sizeof(buf) > strlen(buf));
k = sizeof(buf) - strlen(buf);
r = snprintf(buf + strlen(buf), k, ".%06"PRIu64, x % USEC_PER_SEC);
if (r <= 0 || (size_t) r >= k) { /* too long? */
log_error("Failed to format precise time");
return -EINVAL;
}
}
break;
default:
assert_not_reached("Unknown time format");
}
}
fputs(buf, f);
return (int) strlen(buf);
}
static int process(
const char *controller,
const char *path,
Hashmap *a,
Hashmap *b,
unsigned iteration,
Group **ret) {
Group *g;
int r;
assert(controller);
assert(path);
assert(a);
g = hashmap_get(a, path);
if (!g) {
g = hashmap_get(b, path);
if (!g) {
g = new0(Group, 1);
if (!g)
return -ENOMEM;
g->path = strdup(path);
if (!g->path) {
group_free(g);
return -ENOMEM;
}
r = hashmap_put(a, g->path, g);
if (r < 0) {
group_free(g);
return r;
}
} else {
r = hashmap_move_one(a, b, path);
if (r < 0)
return r;
g->cpu_valid = g->memory_valid = g->io_valid = g->n_tasks_valid = false;
}
}
if (streq(controller, SYSTEMD_CGROUP_CONTROLLER) && IN_SET(arg_count, COUNT_ALL_PROCESSES, COUNT_USERSPACE_PROCESSES)) {
_cleanup_fclose_ FILE *f = NULL;
pid_t pid;
r = cg_enumerate_processes(controller, path, &f);
if (r == -ENOENT)
return 0;
if (r < 0)
return r;
g->n_tasks = 0;
while (cg_read_pid(f, &pid) > 0) {
if (arg_count == COUNT_USERSPACE_PROCESSES && is_kernel_thread(pid) > 0)
continue;
g->n_tasks++;
}
if (g->n_tasks > 0)
g->n_tasks_valid = true;
} else if (streq(controller, "pids") && arg_count == COUNT_PIDS) {
_cleanup_free_ char *p = NULL, *v = NULL;
r = cg_get_path(controller, path, "pids.current", &p);
if (r < 0)
return r;
r = read_one_line_file(p, &v);
if (r == -ENOENT)
return 0;
if (r < 0)
return r;
r = safe_atou64(v, &g->n_tasks);
if (r < 0)
return r;
if (g->n_tasks > 0)
g->n_tasks_valid = true;
} else if (streq(controller, "cpu") || streq(controller, "cpuacct")) {
_cleanup_free_ char *p = NULL, *v = NULL;
uint64_t new_usage;
nsec_t timestamp;
if (cg_all_unified() > 0) {
const char *keys[] = { "usage_usec", NULL };
_cleanup_free_ char *val = NULL;
if (!streq(controller, "cpu"))
return 0;
r = cg_get_keyed_attribute("cpu", path, "cpu.stat", keys, &val);
if (r == -ENOENT)
return 0;
if (r < 0)
return r;
r = safe_atou64(val, &new_usage);
if (r < 0)
return r;
new_usage *= NSEC_PER_USEC;
} else {
if (!streq(controller, "cpuacct"))
return 0;
r = cg_get_path(controller, path, "cpuacct.usage", &p);
if (r < 0)
return r;
r = read_one_line_file(p, &v);
if (r == -ENOENT)
return 0;
if (r < 0)
return r;
r = safe_atou64(v, &new_usage);
if (r < 0)
return r;
}
timestamp = now_nsec(CLOCK_MONOTONIC);
if (g->cpu_iteration == iteration - 1 &&
(nsec_t) new_usage > g->cpu_usage) {
nsec_t x, y;
x = timestamp - g->cpu_timestamp;
if (x < 1)
x = 1;
y = (nsec_t) new_usage - g->cpu_usage;
g->cpu_fraction = (double) y / (double) x;
g->cpu_valid = true;
}
g->cpu_usage = (nsec_t) new_usage;
g->cpu_timestamp = timestamp;
g->cpu_iteration = iteration;
} else if (streq(controller, "memory")) {
_cleanup_free_ char *p = NULL, *v = NULL;
if (cg_all_unified() <= 0)
r = cg_get_path(controller, path, "memory.usage_in_bytes", &p);
else
r = cg_get_path(controller, path, "memory.current", &p);
if (r < 0)
return r;
r = read_one_line_file(p, &v);
if (r == -ENOENT)
return 0;
if (r < 0)
return r;
r = safe_atou64(v, &g->memory);
if (r < 0)
return r;
if (g->memory > 0)
g->memory_valid = true;
} else if ((streq(controller, "io") && cg_all_unified() > 0) ||
(streq(controller, "blkio") && cg_all_unified() <= 0)) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_free_ char *p = NULL;
bool unified = cg_all_unified() > 0;
uint64_t wr = 0, rd = 0;
nsec_t timestamp;
r = cg_get_path(controller, path, unified ? "io.stat" : "blkio.io_service_bytes", &p);
if (r < 0)
return r;
f = fopen(p, "re");
if (!f) {
if (errno == ENOENT)
return 0;
return -errno;
}
for (;;) {
char line[LINE_MAX], *l;
uint64_t k, *q;
if (!fgets(line, sizeof(line), f))
break;
/* Trim and skip the device */
l = strstrip(line);
l += strcspn(l, WHITESPACE);
l += strspn(l, WHITESPACE);
if (unified) {
while (!isempty(l)) {
if (sscanf(l, "rbytes=%" SCNu64, &k))
rd += k;
else if (sscanf(l, "wbytes=%" SCNu64, &k))
wr += k;
l += strcspn(l, WHITESPACE);
l += strspn(l, WHITESPACE);
}
} else {
if (first_word(l, "Read")) {
l += 4;
q = &rd;
} else if (first_word(l, "Write")) {
l += 5;
q = ≀
} else
continue;
l += strspn(l, WHITESPACE);
r = safe_atou64(l, &k);
if (r < 0)
continue;
*q += k;
}
}
timestamp = now_nsec(CLOCK_MONOTONIC);
if (g->io_iteration == iteration - 1) {
uint64_t x, yr, yw;
x = (uint64_t) (timestamp - g->io_timestamp);
if (x < 1)
x = 1;
if (rd > g->io_input)
yr = rd - g->io_input;
else
yr = 0;
if (wr > g->io_output)
yw = wr - g->io_output;
else
yw = 0;
if (yr > 0 || yw > 0) {
g->io_input_bps = (yr * 1000000000ULL) / x;
g->io_output_bps = (yw * 1000000000ULL) / x;
g->io_valid = true;
}
}
g->io_input = rd;
g->io_output = wr;
g->io_timestamp = timestamp;
g->io_iteration = iteration;
}
if (ret)
*ret = g;
return 0;
}
int bus_append_unit_property_assignment(sd_bus_message *m, const char *assignment) {
const char *eq, *field;
int r;
assert(m);
assert(assignment);
eq = strchr(assignment, '=');
if (!eq) {
log_error("Not an assignment: %s", assignment);
return -EINVAL;
}
field = strndupa(assignment, eq - assignment);
eq ++;
if (streq(field, "CPUQuota")) {
if (isempty(eq)) {
r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "v", "t", USEC_INFINITY);
} else if (endswith(eq, "%")) {
double percent;
if (sscanf(eq, "%lf%%", &percent) != 1 || percent <= 0) {
log_error("CPU quota '%s' invalid.", eq);
return -EINVAL;
}
r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, "CPUQuotaPerSecUSec");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "v", "t", (usec_t) percent * USEC_PER_SEC / 100);
} else {
log_error("CPU quota needs to be in percent.");
return -EINVAL;
}
if (r < 0)
return bus_log_create_error(r);
return 0;
}
r = sd_bus_message_append_basic(m, SD_BUS_TYPE_STRING, field);
if (r < 0)
return bus_log_create_error(r);
if (STR_IN_SET(field,
"CPUAccounting", "MemoryAccounting", "BlockIOAccounting",
"SendSIGHUP", "SendSIGKILL")) {
r = parse_boolean(eq);
if (r < 0) {
log_error("Failed to parse boolean assignment %s.", assignment);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "b", r);
} else if (streq(field, "MemoryLimit")) {
off_t bytes;
r = parse_size(eq, 1024, &bytes);
if (r < 0) {
log_error("Failed to parse bytes specification %s", assignment);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "t", (uint64_t) bytes);
} else if (STR_IN_SET(field, "CPUShares", "BlockIOWeight")) {
uint64_t u;
r = safe_atou64(eq, &u);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "t", u);
} else if (STR_IN_SET(field, "User", "Group", "DevicePolicy", "KillMode"))
r = sd_bus_message_append(m, "v", "s", eq);
else if (streq(field, "DeviceAllow")) {
if (isempty(eq))
r = sd_bus_message_append(m, "v", "a(ss)", 0);
else {
const char *path, *rwm, *e;
e = strchr(eq, ' ');
if (e) {
path = strndupa(eq, e - eq);
rwm = e+1;
} else {
path = eq;
rwm = "";
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "a(ss)", 1, path, rwm);
}
} else if (STR_IN_SET(field, "BlockIOReadBandwidth", "BlockIOWriteBandwidth")) {
if (isempty(eq))
r = sd_bus_message_append(m, "v", "a(st)", 0);
else {
const char *path, *bandwidth, *e;
off_t bytes;
e = strchr(eq, ' ');
if (e) {
path = strndupa(eq, e - eq);
bandwidth = e+1;
} else {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
r = parse_size(bandwidth, 1000, &bytes);
if (r < 0) {
log_error("Failed to parse byte value %s.", bandwidth);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "a(st)", 1, path, (uint64_t) bytes);
}
} else if (streq(field, "BlockIODeviceWeight")) {
if (isempty(eq))
r = sd_bus_message_append(m, "v", "a(st)", 0);
else {
const char *path, *weight, *e;
uint64_t u;
e = strchr(eq, ' ');
if (e) {
path = strndupa(eq, e - eq);
weight = e+1;
} else {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
if (!path_startswith(path, "/dev")) {
log_error("%s is not a device file in /dev.", path);
return -EINVAL;
}
r = safe_atou64(weight, &u);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, weight);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "a(st)", path, u);
}
} else if (rlimit_from_string(field) >= 0) {
uint64_t rl;
if (streq(eq, "infinity"))
rl = (uint64_t) -1;
else {
r = safe_atou64(eq, &rl);
if (r < 0) {
log_error("Invalid resource limit: %s", eq);
return -EINVAL;
}
}
r = sd_bus_message_append(m, "v", "t", rl);
} else if (streq(field, "Nice")) {
int32_t i;
r = safe_atoi32(eq, &i);
if (r < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "i", i);
} else if (streq(field, "Environment")) {
r = sd_bus_message_append(m, "v", "as", 1, eq);
} else if (streq(field, "KillSignal")) {
int sig;
sig = signal_from_string_try_harder(eq);
if (sig < 0) {
log_error("Failed to parse %s value %s.", field, eq);
return -EINVAL;
}
r = sd_bus_message_append(m, "v", "i", sig);
} else {
log_error("Unknown assignment %s.", assignment);
return -EINVAL;
}
if (r < 0)
return bus_log_create_error(r);
return 0;
}
static int process(const char *controller, const char *path, Hashmap *a, Hashmap *b, unsigned iteration) {
Group *g;
int r;
FILE *f = NULL;
pid_t pid;
unsigned n;
assert(controller);
assert(path);
assert(a);
g = hashmap_get(a, path);
if (!g) {
g = hashmap_get(b, path);
if (!g) {
g = new0(Group, 1);
if (!g)
return -ENOMEM;
g->path = strdup(path);
if (!g->path) {
group_free(g);
return -ENOMEM;
}
r = hashmap_put(a, g->path, g);
if (r < 0) {
group_free(g);
return r;
}
} else {
assert_se(hashmap_move_one(a, b, path) == 0);
g->cpu_valid = g->memory_valid = g->io_valid = g->n_tasks_valid = false;
}
}
/* Regardless which controller, let's find the maximum number
* of processes in any of it */
r = cg_enumerate_processes(controller, path, &f);
if (r < 0)
return r;
n = 0;
while (cg_read_pid(f, &pid) > 0)
n++;
fclose(f);
if (n > 0) {
if (g->n_tasks_valid)
g->n_tasks = MAX(g->n_tasks, n);
else
g->n_tasks = n;
g->n_tasks_valid = true;
}
if (streq(controller, "cpuacct")) {
uint64_t new_usage;
char *p, *v;
struct timespec ts;
r = cg_get_path(controller, path, "cpuacct.usage", &p);
if (r < 0)
return r;
r = read_one_line_file(p, &v);
free(p);
if (r < 0)
return r;
r = safe_atou64(v, &new_usage);
free(v);
if (r < 0)
return r;
assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
if (g->cpu_iteration == iteration - 1) {
uint64_t x, y;
x = ((uint64_t) ts.tv_sec * 1000000000ULL + (uint64_t) ts.tv_nsec) -
((uint64_t) g->cpu_timestamp.tv_sec * 1000000000ULL + (uint64_t) g->cpu_timestamp.tv_nsec);
y = new_usage - g->cpu_usage;
if (y > 0) {
g->cpu_fraction = (double) y / (double) x;
g->cpu_valid = true;
}
}
g->cpu_usage = new_usage;
g->cpu_timestamp = ts;
g->cpu_iteration = iteration;
} else if (streq(controller, "memory")) {
char *p, *v;
r = cg_get_path(controller, path, "memory.usage_in_bytes", &p);
if (r < 0)
return r;
r = read_one_line_file(p, &v);
free(p);
if (r < 0)
return r;
r = safe_atou64(v, &g->memory);
free(v);
if (r < 0)
return r;
if (g->memory > 0)
g->memory_valid = true;
} else if (streq(controller, "blkio")) {
char *p;
uint64_t wr = 0, rd = 0;
struct timespec ts;
r = cg_get_path(controller, path, "blkio.io_service_bytes", &p);
if (r < 0)
return r;
f = fopen(p, "re");
free(p);
if (!f)
return -errno;
for (;;) {
char line[LINE_MAX], *l;
uint64_t k, *q;
if (!fgets(line, sizeof(line), f))
break;
l = strstrip(line);
l += strcspn(l, WHITESPACE);
l += strspn(l, WHITESPACE);
if (first_word(l, "Read")) {
l += 4;
q = &rd;
} else if (first_word(l, "Write")) {
l += 5;
q = ≀
} else
continue;
l += strspn(l, WHITESPACE);
r = safe_atou64(l, &k);
if (r < 0)
continue;
*q += k;
}
fclose(f);
assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0);
if (g->io_iteration == iteration - 1) {
uint64_t x, yr, yw;
x = ((uint64_t) ts.tv_sec * 1000000000ULL + (uint64_t) ts.tv_nsec) -
((uint64_t) g->io_timestamp.tv_sec * 1000000000ULL + (uint64_t) g->io_timestamp.tv_nsec);
yr = rd - g->io_input;
yw = wr - g->io_output;
if (yr > 0 || yw > 0) {
g->io_input_bps = (yr * 1000000000ULL) / x;
g->io_output_bps = (yw * 1000000000ULL) / x;
g->io_valid = true;
}
}
g->io_input = rd;
g->io_output = wr;
g->io_timestamp = ts;
g->io_iteration = iteration;
}
return 0;
}
static int save_external_coredump(
const char *context[_CONTEXT_MAX],
int input_fd,
char **ret_filename,
int *ret_node_fd,
int *ret_data_fd,
uint64_t *ret_size) {
_cleanup_free_ char *fn = NULL, *tmp = NULL;
_cleanup_close_ int fd = -1;
uint64_t rlimit, max_size;
struct stat st;
uid_t uid;
int r;
assert(context);
assert(ret_filename);
assert(ret_node_fd);
assert(ret_data_fd);
assert(ret_size);
r = parse_uid(context[CONTEXT_UID], &uid);
if (r < 0)
return log_error_errno(r, "Failed to parse UID: %m");
r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit);
if (r < 0)
return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]);
if (rlimit <= 0) {
/* Is coredumping disabled? Then don't bother saving/processing the coredump */
log_info("Core Dumping has been disabled for process %s (%s).", context[CONTEXT_PID], context[CONTEXT_COMM]);
return -EBADSLT;
}
/* Never store more than the process configured, or than we actually shall keep or process */
max_size = MIN(rlimit, MAX(arg_process_size_max, arg_external_size_max));
r = make_filename(context, &fn);
if (r < 0)
return log_error_errno(r, "Failed to determine coredump file name: %m");
mkdir_p_label("/var/lib/systemd/coredump", 0755);
fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp);
if (fd < 0)
return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn);
r = copy_bytes(input_fd, fd, max_size, false);
if (r == -EFBIG) {
log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", context[CONTEXT_PID], context[CONTEXT_COMM]);
goto fail;
} else if (IN_SET(r, -EDQUOT, -ENOSPC)) {
log_error("Not enough disk space for coredump of %s (%s), refusing.", context[CONTEXT_PID], context[CONTEXT_COMM]);
goto fail;
} else if (r < 0) {
log_error_errno(r, "Failed to dump coredump to file: %m");
goto fail;
}
if (fstat(fd, &st) < 0) {
log_error_errno(errno, "Failed to fstat coredump %s: %m", coredump_tmpfile_name(tmp));
goto fail;
}
if (lseek(fd, 0, SEEK_SET) == (off_t) -1) {
log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(tmp));
goto fail;
}
#if defined(HAVE_XZ) || defined(HAVE_LZ4)
/* If we will remove the coredump anyway, do not compress. */
if (maybe_remove_external_coredump(NULL, st.st_size) == 0
&& arg_compress) {
_cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL;
_cleanup_close_ int fd_compressed = -1;
fn_compressed = strappend(fn, COMPRESSED_EXT);
if (!fn_compressed) {
log_oom();
goto uncompressed;
}
fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed);
if (fd_compressed < 0) {
log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed);
goto uncompressed;
}
r = compress_stream(fd, fd_compressed, -1);
if (r < 0) {
log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed));
goto fail_compressed;
}
r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid);
if (r < 0)
goto fail_compressed;
/* OK, this worked, we can get rid of the uncompressed version now */
if (tmp)
unlink_noerrno(tmp);
*ret_filename = fn_compressed; /* compressed */
*ret_node_fd = fd_compressed; /* compressed */
*ret_data_fd = fd; /* uncompressed */
*ret_size = (uint64_t) st.st_size; /* uncompressed */
fn_compressed = NULL;
fd = fd_compressed = -1;
return 0;
fail_compressed:
if (tmp_compressed)
(void) unlink(tmp_compressed);
}
uncompressed:
#endif
r = fix_permissions(fd, tmp, fn, context, uid);
if (r < 0)
goto fail;
*ret_filename = fn;
*ret_data_fd = fd;
*ret_node_fd = -1;
*ret_size = (uint64_t) st.st_size;
fn = NULL;
fd = -1;
return 0;
fail:
if (tmp)
(void) unlink(tmp);
return r;
}
static int save_external_coredump(
const char *context[_CONTEXT_MAX],
int input_fd,
char **ret_filename,
int *ret_node_fd,
int *ret_data_fd,
uint64_t *ret_size) {
_cleanup_free_ char *fn = NULL, *tmp = NULL;
_cleanup_close_ int fd = -1;
uint64_t rlimit, max_size;
struct stat st;
uid_t uid;
int r;
assert(context);
assert(ret_filename);
assert(ret_node_fd);
assert(ret_data_fd);
assert(ret_size);
r = parse_uid(context[CONTEXT_UID], &uid);
if (r < 0)
return log_error_errno(r, "Failed to parse UID: %m");
r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit);
if (r < 0)
return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]);
if (rlimit < page_size()) {
/* Is coredumping disabled? Then don't bother saving/processing the coredump.
* Anything below PAGE_SIZE cannot give a readable coredump (the kernel uses
* ELF_EXEC_PAGESIZE which is not easily accessible, but is usually the same as PAGE_SIZE. */
log_info("Resource limits disable core dumping for process %s (%s).",
context[CONTEXT_PID], context[CONTEXT_COMM]);
return -EBADSLT;
}
/* Never store more than the process configured, or than we actually shall keep or process */
max_size = MIN(rlimit, MAX(arg_process_size_max, storage_size_max()));
r = make_filename(context, &fn);
if (r < 0)
return log_error_errno(r, "Failed to determine coredump file name: %m");
mkdir_p_label("/var/lib/systemd/coredump", 0755);
fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp);
if (fd < 0)
return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn);
r = copy_bytes(input_fd, fd, max_size, false);
if (r < 0) {
log_error_errno(r, "Cannot store coredump of %s (%s): %m", context[CONTEXT_PID], context[CONTEXT_COMM]);
goto fail;
} else if (r == 1)
log_struct(LOG_INFO,
LOG_MESSAGE("Core file was truncated to %zu bytes.", max_size),
"SIZE_LIMIT=%zu", max_size,
LOG_MESSAGE_ID(SD_MESSAGE_TRUNCATED_CORE),
NULL);
if (fstat(fd, &st) < 0) {
log_error_errno(errno, "Failed to fstat core file %s: %m", coredump_tmpfile_name(tmp));
goto fail;
}
if (lseek(fd, 0, SEEK_SET) == (off_t) -1) {
log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(tmp));
goto fail;
}
#if defined(HAVE_XZ) || defined(HAVE_LZ4)
/* If we will remove the coredump anyway, do not compress. */
if (arg_compress && !maybe_remove_external_coredump(NULL, st.st_size)) {
_cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL;
_cleanup_close_ int fd_compressed = -1;
fn_compressed = strappend(fn, COMPRESSED_EXT);
if (!fn_compressed) {
log_oom();
goto uncompressed;
}
fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed);
if (fd_compressed < 0) {
log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed);
goto uncompressed;
}
r = compress_stream(fd, fd_compressed, -1);
if (r < 0) {
log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed));
goto fail_compressed;
}
r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid);
if (r < 0)
goto fail_compressed;
/* OK, this worked, we can get rid of the uncompressed version now */
if (tmp)
unlink_noerrno(tmp);
*ret_filename = fn_compressed; /* compressed */
*ret_node_fd = fd_compressed; /* compressed */
*ret_data_fd = fd; /* uncompressed */
*ret_size = (uint64_t) st.st_size; /* uncompressed */
fn_compressed = NULL;
fd = fd_compressed = -1;
return 0;
fail_compressed:
if (tmp_compressed)
(void) unlink(tmp_compressed);
}
uncompressed:
#endif
r = fix_permissions(fd, tmp, fn, context, uid);
if (r < 0)
goto fail;
*ret_filename = fn;
*ret_data_fd = fd;
*ret_node_fd = -1;
*ret_size = (uint64_t) st.st_size;
fn = NULL;
fd = -1;
return 0;
fail:
if (tmp)
(void) unlink(tmp);
return r;
}
static void dev_kmsg_record(Server *s, const char *p, size_t l) {
_cleanup_free_ char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL, *identifier = NULL, *pid = NULL;
struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS + 2 + N_IOVEC_UDEV_FIELDS];
char *kernel_device = NULL;
unsigned long long usec;
size_t n = 0, z = 0, j;
int priority, r;
char *e, *f, *k;
uint64_t serial;
size_t pl;
assert(s);
assert(p);
if (l <= 0)
return;
e = memchr(p, ',', l);
if (!e)
return;
*e = 0;
r = safe_atoi(p, &priority);
if (r < 0 || priority < 0 || priority > 999)
return;
if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN)
return;
l -= (e - p) + 1;
p = e + 1;
e = memchr(p, ',', l);
if (!e)
return;
*e = 0;
r = safe_atou64(p, &serial);
if (r < 0)
return;
if (s->kernel_seqnum) {
/* We already read this one? */
if (serial < *s->kernel_seqnum)
return;
/* Did we lose any? */
if (serial > *s->kernel_seqnum)
server_driver_message(s, 0,
"MESSAGE_ID=" SD_MESSAGE_JOURNAL_MISSED_STR,
LOG_MESSAGE("Missed %"PRIu64" kernel messages",
serial - *s->kernel_seqnum),
NULL);
/* Make sure we never read this one again. Note that
* we always store the next message serial we expect
* here, simply because this makes handling the first
* message with serial 0 easy. */
*s->kernel_seqnum = serial + 1;
}
l -= (e - p) + 1;
p = e + 1;
f = memchr(p, ';', l);
if (!f)
return;
/* Kernel 3.6 has the flags field, kernel 3.5 lacks that */
e = memchr(p, ',', l);
if (!e || f < e)
e = f;
*e = 0;
r = safe_atollu(p, &usec);
if (r < 0)
return;
l -= (f - p) + 1;
p = f + 1;
e = memchr(p, '\n', l);
if (!e)
return;
*e = 0;
pl = e - p;
l -= (e - p) + 1;
k = e + 1;
for (j = 0; l > 0 && j < N_IOVEC_KERNEL_FIELDS; j++) {
char *m;
/* Metadata fields attached */
if (*k != ' ')
break;
k++, l--;
e = memchr(k, '\n', l);
if (!e)
return;
*e = 0;
if (cunescape_length_with_prefix(k, e - k, "_KERNEL_", UNESCAPE_RELAX, &m) < 0)
break;
if (startswith(m, "_KERNEL_DEVICE="))
kernel_device = m + 15;
iovec[n++] = IOVEC_MAKE_STRING(m);
z++;
l -= (e - k) + 1;
k = e + 1;
}
if (kernel_device) {
struct udev_device *ud;
ud = udev_device_new_from_device_id(s->udev, kernel_device);
if (ud) {
const char *g;
struct udev_list_entry *ll;
char *b;
g = udev_device_get_devnode(ud);
if (g) {
b = strappend("_UDEV_DEVNODE=", g);
if (b) {
iovec[n++] = IOVEC_MAKE_STRING(b);
z++;
}
}
g = udev_device_get_sysname(ud);
if (g) {
b = strappend("_UDEV_SYSNAME=", g);
if (b) {
iovec[n++] = IOVEC_MAKE_STRING(b);
z++;
}
}
j = 0;
ll = udev_device_get_devlinks_list_entry(ud);
udev_list_entry_foreach(ll, ll) {
if (j > N_IOVEC_UDEV_FIELDS)
break;
g = udev_list_entry_get_name(ll);
if (g) {
b = strappend("_UDEV_DEVLINK=", g);
if (b) {
iovec[n++] = IOVEC_MAKE_STRING(b);
z++;
}
}
j++;
}
udev_device_unref(ud);
}
}
if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu", usec) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(source_time);
iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=kernel");
if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(syslog_priority);
if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(syslog_facility);
if ((priority & LOG_FACMASK) == LOG_KERN)
iovec[n++] = IOVEC_MAKE_STRING("SYSLOG_IDENTIFIER=kernel");
else {
pl -= syslog_parse_identifier((const char**) &p, &identifier, &pid);
/* Avoid any messages we generated ourselves via
* log_info() and friends. */
if (pid && is_us(pid))
goto finish;
if (identifier) {
syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier);
if (syslog_identifier)
iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier);
}
if (pid) {
syslog_pid = strappend("SYSLOG_PID=", pid);
if (syslog_pid)
iovec[n++] = IOVEC_MAKE_STRING(syslog_pid);
}
}
if (cunescape_length_with_prefix(p, pl, "MESSAGE=", UNESCAPE_RELAX, &message) >= 0)
iovec[n++] = IOVEC_MAKE_STRING(message);
server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, priority, 0);
finish:
for (j = 0; j < z; j++)
free(iovec[j].iov_base);
}
static int condition_test_needs_update(Condition *c) {
const char *p;
struct stat usr, other;
assert(c);
assert(c->parameter);
assert(c->type == CONDITION_NEEDS_UPDATE);
/* If the file system is read-only we shouldn't suggest an update */
if (path_is_read_only_fs(c->parameter) > 0)
return false;
/* Any other failure means we should allow the condition to be true,
* so that we rather invoke too many update tools than too
* few. */
if (!path_is_absolute(c->parameter))
return true;
p = strjoina(c->parameter, "/.updated");
if (lstat(p, &other) < 0)
return true;
if (lstat("/usr/", &usr) < 0)
return true;
/*
* First, compare seconds as they are always accurate...
*/
if (usr.st_mtim.tv_sec != other.st_mtim.tv_sec)
return usr.st_mtim.tv_sec > other.st_mtim.tv_sec;
/*
* ...then compare nanoseconds.
*
* A false positive is only possible when /usr's nanoseconds > 0
* (otherwise /usr cannot be strictly newer than the target file)
* AND the target file's nanoseconds == 0
* (otherwise the filesystem supports nsec timestamps, see stat(2)).
*/
if (usr.st_mtim.tv_nsec > 0 && other.st_mtim.tv_nsec == 0) {
_cleanup_free_ char *timestamp_str = NULL;
uint64_t timestamp;
int r;
r = parse_env_file(p, NULL, "TIMESTAMP_NSEC", ×tamp_str, NULL);
if (r < 0) {
log_error_errno(r, "Failed to parse timestamp file '%s', using mtime: %m", p);
return true;
} else if (r == 0) {
log_debug("No data in timestamp file '%s', using mtime", p);
return true;
}
r = safe_atou64(timestamp_str, ×tamp);
if (r < 0) {
log_error_errno(r, "Failed to parse timestamp value '%s' in file '%s', using mtime: %m", timestamp_str, p);
return true;
}
timespec_store(&other.st_mtim, timestamp);
}
return usr.st_mtim.tv_nsec > other.st_mtim.tv_nsec;
}
static int device_amend(sd_device *device, const char *key, const char *value) {
int r;
assert(device);
assert(key);
assert(value);
if (streq(key, "DEVPATH")) {
char *path;
path = strjoina("/sys", value);
/* the caller must verify or trust this data (e.g., if it comes from the kernel) */
r = device_set_syspath(device, path, false);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set syspath to '%s': %m", path);
} else if (streq(key, "SUBSYSTEM")) {
r = device_set_subsystem(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set subsystem to '%s': %m", value);
} else if (streq(key, "DEVTYPE")) {
r = device_set_devtype(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set devtype to '%s': %m", value);
} else if (streq(key, "DEVNAME")) {
r = device_set_devname(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set devname to '%s': %m", value);
} else if (streq(key, "USEC_INITIALIZED")) {
usec_t t;
r = safe_atou64(value, &t);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to parse timestamp '%s': %m", value);
r = device_set_usec_initialized(device, t);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set usec-initialized to '%s': %m", value);
} else if (streq(key, "DRIVER")) {
r = device_set_driver(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set driver to '%s': %m", value);
} else if (streq(key, "IFINDEX")) {
r = device_set_ifindex(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set ifindex to '%s': %m", value);
} else if (streq(key, "DEVMODE")) {
r = device_set_devmode(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set devmode to '%s': %m", value);
} else if (streq(key, "DEVUID")) {
r = device_set_devuid(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set devuid to '%s': %m", value);
} else if (streq(key, "DEVGID")) {
r = device_set_devgid(device, value);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to set devgid to '%s': %m", value);
} else if (streq(key, "DEVLINKS")) {
const char *word, *state;
size_t l;
FOREACH_WORD(word, l, value, state) {
char devlink[l + 1];
strncpy(devlink, word, l);
devlink[l] = '\0';
r = device_add_devlink(device, devlink);
if (r < 0)
return log_device_debug_errno(device, r, "sd-device: Failed to add devlink '%s': %m", devlink);
}
} else if (streq(key, "TAGS")) {
