static int killall(int sign) {
DIR *dir;
struct dirent *d;
unsigned int n_processes = 0;
if ((dir = opendir("/proc")) == NULL)
return -errno;
while ((d = readdir(dir))) {
pid_t pid;
if (parse_pid(d->d_name, &pid) < 0)
continue;
if (is_kernel_thread(pid))
continue;
if (ignore_proc(pid))
continue;
if (kill(pid, sign) == 0)
n_processes++;
else
log_warning("Could not kill %d: %m", pid);
}
closedir(dir);
return n_processes;
}
static void test_get_process_comm(pid_t pid) {
struct stat st;
_cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL;
_cleanup_free_ char *env = NULL;
char path[strlen("/proc//comm") + DECIMAL_STR_MAX(pid_t)];
pid_t e;
uid_t u;
gid_t g;
dev_t h;
int r;
xsprintf(path, "/proc/"PID_FMT"/comm", pid);
if (stat(path, &st) == 0) {
assert_se(get_process_comm(pid, &a) >= 0);
log_info("PID"PID_FMT" comm: '%s'", pid, a);
} else
log_warning("%s not exist.", path);
assert_se(get_process_cmdline(pid, 0, true, &c) >= 0);
log_info("PID"PID_FMT" cmdline: '%s'", pid, c);
assert_se(get_process_cmdline(pid, 8, false, &d) >= 0);
log_info("PID"PID_FMT" cmdline truncated to 8: '%s'", pid, d);
free(d);
assert_se(get_process_cmdline(pid, 1, false, &d) >= 0);
log_info("PID"PID_FMT" cmdline truncated to 1: '%s'", pid, d);
assert_se(get_process_ppid(pid, &e) >= 0);
log_info("PID"PID_FMT" PPID: "PID_FMT, pid, e);
assert_se(pid == 1 ? e == 0 : e > 0);
assert_se(is_kernel_thread(pid) == 0 || pid != 1);
r = get_process_exe(pid, &f);
assert_se(r >= 0 || r == -EACCES);
log_info("PID"PID_FMT" exe: '%s'", pid, strna(f));
assert_se(get_process_uid(pid, &u) == 0);
log_info("PID"PID_FMT" UID: "UID_FMT, pid, u);
assert_se(u == 0 || pid != 1);
assert_se(get_process_gid(pid, &g) == 0);
log_info("PID"PID_FMT" GID: "GID_FMT, pid, g);
assert_se(g == 0 || pid != 1);
r = get_process_environ(pid, &env);
assert_se(r >= 0 || r == -EACCES);
log_info("PID"PID_FMT" strlen(environ): %zi", pid, env ? (ssize_t)strlen(env) : (ssize_t)-errno);
if (!detect_container())
assert_se(get_ctty_devnr(pid, &h) == -ENXIO || pid != 1);
getenv_for_pid(pid, "PATH", &i);
log_info("PID"PID_FMT" $PATH: '%s'", pid, strna(i));
}
static void test_proc(void) {
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
int r;
d = opendir("/proc");
assert_se(d);
FOREACH_DIRENT(de, d, break) {
_cleanup_free_ char *path = NULL, *path_shifted = NULL, *session = NULL, *unit = NULL, *user_unit = NULL, *machine = NULL, *slice = NULL;
pid_t pid;
uid_t uid = UID_INVALID;
if (de->d_type != DT_DIR &&
de->d_type != DT_UNKNOWN)
continue;
r = parse_pid(de->d_name, &pid);
if (r < 0)
continue;
if (is_kernel_thread(pid))
continue;
cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &path);
cg_pid_get_path_shifted(pid, NULL, &path_shifted);
cg_pid_get_owner_uid(pid, &uid);
cg_pid_get_session(pid, &session);
cg_pid_get_unit(pid, &unit);
cg_pid_get_user_unit(pid, &user_unit);
cg_pid_get_machine_name(pid, &machine);
cg_pid_get_slice(pid, &slice);
printf(PID_FMT"\t%s\t%s\t"UID_FMT"\t%s\t%s\t%s\t%s\t%s\n",
pid,
path,
path_shifted,
uid,
session,
unit,
user_unit,
machine,
slice);
}
}
static void panic_print_task_info(task_info *curr)
{
const char *str;
if (curr && curr != kernel_process && curr->tid != -1) {
if (!is_kernel_thread(curr)) {
printk("Current task [USER]: tid: %i, pid: %i\n",
curr->tid, curr->pi->pid);
} else {
str = find_sym_at_addr_safe((uptr)curr->what, NULL, NULL);
printk("Current task [KERNEL]: tid: %i [%s]\n",
curr->tid, str ? str : "???");
}
} else {
printk("Current task: NONE\n");
}
}
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;
}
static void test_get_process_comm(void) {
struct stat st;
_cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL, *cwd = NULL, *root = NULL;
_cleanup_free_ char *env = NULL;
pid_t e;
uid_t u;
gid_t g;
dev_t h;
int r;
pid_t me;
if (stat("/proc/1/comm", &st) == 0) {
assert_se(get_process_comm(1, &a) >= 0);
log_info("pid1 comm: '%s'", a);
} else
log_warning("/proc/1/comm does not exist.");
assert_se(get_process_cmdline(1, 0, true, &c) >= 0);
log_info("pid1 cmdline: '%s'", c);
assert_se(get_process_cmdline(1, 8, false, &d) >= 0);
log_info("pid1 cmdline truncated: '%s'", d);
assert_se(get_process_ppid(1, &e) >= 0);
log_info("pid1 ppid: "PID_FMT, e);
assert_se(e == 0);
assert_se(is_kernel_thread(1) == 0);
r = get_process_exe(1, &f);
assert_se(r >= 0 || r == -EACCES);
log_info("pid1 exe: '%s'", strna(f));
assert_se(get_process_uid(1, &u) == 0);
log_info("pid1 uid: "UID_FMT, u);
assert_se(u == 0);
assert_se(get_process_gid(1, &g) == 0);
log_info("pid1 gid: "GID_FMT, g);
assert_se(g == 0);
me = getpid();
r = get_process_cwd(me, &cwd);
assert_se(r >= 0 || r == -EACCES);
log_info("pid1 cwd: '%s'", cwd);
r = get_process_root(me, &root);
assert_se(r >= 0 || r == -EACCES);
log_info("pid1 root: '%s'", root);
r = get_process_environ(me, &env);
assert_se(r >= 0 || r == -EACCES);
log_info("self strlen(environ): '%zu'", strlen(env));
if (!detect_container())
assert_se(get_ctty_devnr(1, &h) == -ENXIO);
getenv_for_pid(1, "PATH", &i);
log_info("pid1 $PATH: '%s'", strna(i));
}
