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-rw-r--r--src/systemd-cgtop/cgtop.c1097
1 files changed, 1097 insertions, 0 deletions
diff --git a/src/systemd-cgtop/cgtop.c b/src/systemd-cgtop/cgtop.c
new file mode 100644
index 0000000000..5d021e5ef4
--- /dev/null
+++ b/src/systemd-cgtop/cgtop.c
@@ -0,0 +1,1097 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <alloca.h>
+#include <errno.h>
+#include <getopt.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <systemd/sd-bus.h>
+
+#include "alloc-util.h"
+#include "bus-error.h"
+#include "bus-util.h"
+#include "cgroup-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "hashmap.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "stdio-util.h"
+#include "terminal-util.h"
+#include "unit-name.h"
+#include "util.h"
+
+typedef struct Group {
+ char *path;
+
+ bool n_tasks_valid:1;
+ bool cpu_valid:1;
+ bool memory_valid:1;
+ bool io_valid:1;
+
+ uint64_t n_tasks;
+
+ unsigned cpu_iteration;
+ nsec_t cpu_usage;
+ nsec_t cpu_timestamp;
+ double cpu_fraction;
+
+ uint64_t memory;
+
+ unsigned io_iteration;
+ uint64_t io_input, io_output;
+ nsec_t io_timestamp;
+ uint64_t io_input_bps, io_output_bps;
+} Group;
+
+static unsigned arg_depth = 3;
+static unsigned arg_iterations = (unsigned) -1;
+static bool arg_batch = false;
+static bool arg_raw = false;
+static usec_t arg_delay = 1*USEC_PER_SEC;
+static char* arg_machine = NULL;
+
+enum {
+ COUNT_PIDS,
+ COUNT_USERSPACE_PROCESSES,
+ COUNT_ALL_PROCESSES,
+} arg_count = COUNT_PIDS;
+static bool arg_recursive = true;
+
+static enum {
+ ORDER_PATH,
+ ORDER_TASKS,
+ ORDER_CPU,
+ ORDER_MEMORY,
+ ORDER_IO,
+} arg_order = ORDER_CPU;
+
+static enum {
+ CPU_PERCENT,
+ CPU_TIME,
+} arg_cpu_type = CPU_PERCENT;
+
+static void group_free(Group *g) {
+ assert(g);
+
+ free(g->path);
+ free(g);
+}
+
+static void group_hashmap_clear(Hashmap *h) {
+ Group *g;
+
+ while ((g = hashmap_steal_first(h)))
+ group_free(g);
+}
+
+static void group_hashmap_free(Hashmap *h) {
+ group_hashmap_clear(h);
+ hashmap_free(h);
+}
+
+static const char *maybe_format_bytes(char *buf, size_t l, bool is_valid, uint64_t t) {
+ if (!is_valid)
+ return "-";
+ if (arg_raw) {
+ snprintf(buf, l, "%jd", t);
+ return buf;
+ }
+ return format_bytes(buf, l, t);
+}
+
+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, "cpuacct") && cg_unified() <= 0) {
+ _cleanup_free_ char *p = NULL, *v = NULL;
+ uint64_t new_usage;
+ nsec_t timestamp;
+
+ 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_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, "blkio") && cg_unified() <= 0) {
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char *p = NULL;
+ uint64_t wr = 0, rd = 0;
+ nsec_t timestamp;
+
+ r = cg_get_path(controller, path, "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;
+
+ 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 = &wr;
+ } 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 int refresh_one(
+ const char *controller,
+ const char *path,
+ Hashmap *a,
+ Hashmap *b,
+ unsigned iteration,
+ unsigned depth,
+ Group **ret) {
+
+ _cleanup_closedir_ DIR *d = NULL;
+ Group *ours;
+ int r;
+
+ assert(controller);
+ assert(path);
+ assert(a);
+
+ if (depth > arg_depth)
+ return 0;
+
+ r = process(controller, path, a, b, iteration, &ours);
+ if (r < 0)
+ return r;
+
+ r = cg_enumerate_subgroups(controller, path, &d);
+ if (r == -ENOENT)
+ return 0;
+ if (r < 0)
+ return r;
+
+ for (;;) {
+ _cleanup_free_ char *fn = NULL, *p = NULL;
+ Group *child = NULL;
+
+ r = cg_read_subgroup(d, &fn);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ p = strjoin(path, "/", fn, NULL);
+ if (!p)
+ return -ENOMEM;
+
+ path_kill_slashes(p);
+
+ r = refresh_one(controller, p, a, b, iteration, depth + 1, &child);
+ if (r < 0)
+ return r;
+
+ if (arg_recursive &&
+ IN_SET(arg_count, COUNT_ALL_PROCESSES, COUNT_USERSPACE_PROCESSES) &&
+ child &&
+ child->n_tasks_valid &&
+ streq(controller, SYSTEMD_CGROUP_CONTROLLER)) {
+
+ /* Recursively sum up processes */
+
+ if (ours->n_tasks_valid)
+ ours->n_tasks += child->n_tasks;
+ else {
+ ours->n_tasks = child->n_tasks;
+ ours->n_tasks_valid = true;
+ }
+ }
+ }
+
+ if (ret)
+ *ret = ours;
+
+ return 1;
+}
+
+static int refresh(const char *root, Hashmap *a, Hashmap *b, unsigned iteration) {
+ int r;
+
+ assert(a);
+
+ r = refresh_one(SYSTEMD_CGROUP_CONTROLLER, root, a, b, iteration, 0, NULL);
+ if (r < 0)
+ return r;
+ r = refresh_one("cpuacct", root, a, b, iteration, 0, NULL);
+ if (r < 0)
+ return r;
+ r = refresh_one("memory", root, a, b, iteration, 0, NULL);
+ if (r < 0)
+ return r;
+ r = refresh_one("blkio", root, a, b, iteration, 0, NULL);
+ if (r < 0)
+ return r;
+ r = refresh_one("pids", root, a, b, iteration, 0, NULL);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int group_compare(const void*a, const void *b) {
+ const Group *x = *(Group**)a, *y = *(Group**)b;
+
+ if (arg_order != ORDER_TASKS || arg_recursive) {
+ /* Let's make sure that the parent is always before
+ * the child. Except when ordering by tasks and
+ * recursive summing is off, since that is actually
+ * not accumulative for all children. */
+
+ if (path_startswith(y->path, x->path))
+ return -1;
+ if (path_startswith(x->path, y->path))
+ return 1;
+ }
+
+ switch (arg_order) {
+
+ case ORDER_PATH:
+ break;
+
+ case ORDER_CPU:
+ if (arg_cpu_type == CPU_PERCENT) {
+ if (x->cpu_valid && y->cpu_valid) {
+ if (x->cpu_fraction > y->cpu_fraction)
+ return -1;
+ else if (x->cpu_fraction < y->cpu_fraction)
+ return 1;
+ } else if (x->cpu_valid)
+ return -1;
+ else if (y->cpu_valid)
+ return 1;
+ } else {
+ if (x->cpu_usage > y->cpu_usage)
+ return -1;
+ else if (x->cpu_usage < y->cpu_usage)
+ return 1;
+ }
+
+ break;
+
+ case ORDER_TASKS:
+ if (x->n_tasks_valid && y->n_tasks_valid) {
+ if (x->n_tasks > y->n_tasks)
+ return -1;
+ else if (x->n_tasks < y->n_tasks)
+ return 1;
+ } else if (x->n_tasks_valid)
+ return -1;
+ else if (y->n_tasks_valid)
+ return 1;
+
+ break;
+
+ case ORDER_MEMORY:
+ if (x->memory_valid && y->memory_valid) {
+ if (x->memory > y->memory)
+ return -1;
+ else if (x->memory < y->memory)
+ return 1;
+ } else if (x->memory_valid)
+ return -1;
+ else if (y->memory_valid)
+ return 1;
+
+ break;
+
+ case ORDER_IO:
+ if (x->io_valid && y->io_valid) {
+ if (x->io_input_bps + x->io_output_bps > y->io_input_bps + y->io_output_bps)
+ return -1;
+ else if (x->io_input_bps + x->io_output_bps < y->io_input_bps + y->io_output_bps)
+ return 1;
+ } else if (x->io_valid)
+ return -1;
+ else if (y->io_valid)
+ return 1;
+ }
+
+ return path_compare(x->path, y->path);
+}
+
+static void display(Hashmap *a) {
+ Iterator i;
+ Group *g;
+ Group **array;
+ signed path_columns;
+ unsigned rows, n = 0, j, maxtcpu = 0, maxtpath = 3; /* 3 for ellipsize() to work properly */
+ char buffer[MAX3(21, FORMAT_BYTES_MAX, FORMAT_TIMESPAN_MAX)];
+
+ assert(a);
+
+ if (on_tty())
+ fputs(ANSI_HOME_CLEAR, stdout);
+
+ array = alloca(sizeof(Group*) * hashmap_size(a));
+
+ HASHMAP_FOREACH(g, a, i)
+ if (g->n_tasks_valid || g->cpu_valid || g->memory_valid || g->io_valid)
+ array[n++] = g;
+
+ qsort_safe(array, n, sizeof(Group*), group_compare);
+
+ /* Find the longest names in one run */
+ for (j = 0; j < n; j++) {
+ unsigned cputlen, pathtlen;
+
+ format_timespan(buffer, sizeof(buffer), (usec_t) (array[j]->cpu_usage / NSEC_PER_USEC), 0);
+ cputlen = strlen(buffer);
+ maxtcpu = MAX(maxtcpu, cputlen);
+
+ pathtlen = strlen(array[j]->path);
+ maxtpath = MAX(maxtpath, pathtlen);
+ }
+
+ if (arg_cpu_type == CPU_PERCENT)
+ xsprintf(buffer, "%6s", "%CPU");
+ else
+ xsprintf(buffer, "%*s", maxtcpu, "CPU Time");
+
+ rows = lines();
+ if (rows <= 10)
+ rows = 10;
+
+ if (on_tty()) {
+ const char *on, *off;
+
+ path_columns = columns() - 36 - strlen(buffer);
+ if (path_columns < 10)
+ path_columns = 10;
+
+ on = ansi_highlight_underline();
+ off = ansi_underline();
+
+ printf("%s%s%-*s%s %s%7s%s %s%s%s %s%8s%s %s%8s%s %s%8s%s%s\n",
+ ansi_underline(),
+ arg_order == ORDER_PATH ? on : "", path_columns, "Control Group",
+ arg_order == ORDER_PATH ? off : "",
+ arg_order == ORDER_TASKS ? on : "", arg_count == COUNT_PIDS ? "Tasks" : arg_count == COUNT_USERSPACE_PROCESSES ? "Procs" : "Proc+",
+ arg_order == ORDER_TASKS ? off : "",
+ arg_order == ORDER_CPU ? on : "", buffer,
+ arg_order == ORDER_CPU ? off : "",
+ arg_order == ORDER_MEMORY ? on : "", "Memory",
+ arg_order == ORDER_MEMORY ? off : "",
+ arg_order == ORDER_IO ? on : "", "Input/s",
+ arg_order == ORDER_IO ? off : "",
+ arg_order == ORDER_IO ? on : "", "Output/s",
+ arg_order == ORDER_IO ? off : "",
+ ansi_normal());
+ } else
+ path_columns = maxtpath;
+
+ for (j = 0; j < n; j++) {
+ _cleanup_free_ char *ellipsized = NULL;
+ const char *path;
+
+ if (on_tty() && j + 6 > rows)
+ break;
+
+ g = array[j];
+
+ path = isempty(g->path) ? "/" : g->path;
+ ellipsized = ellipsize(path, path_columns, 33);
+ printf("%-*s", path_columns, ellipsized ?: path);
+
+ if (g->n_tasks_valid)
+ printf(" %7" PRIu64, g->n_tasks);
+ else
+ fputs(" -", stdout);
+
+ if (arg_cpu_type == CPU_PERCENT) {
+ if (g->cpu_valid)
+ printf(" %6.1f", g->cpu_fraction*100);
+ else
+ fputs(" -", stdout);
+ } else
+ printf(" %*s", maxtcpu, format_timespan(buffer, sizeof(buffer), (usec_t) (g->cpu_usage / NSEC_PER_USEC), 0));
+
+ printf(" %8s", maybe_format_bytes(buffer, sizeof(buffer), g->memory_valid, g->memory));
+ printf(" %8s", maybe_format_bytes(buffer, sizeof(buffer), g->io_valid, g->io_input_bps));
+ printf(" %8s", maybe_format_bytes(buffer, sizeof(buffer), g->io_valid, g->io_output_bps));
+
+ putchar('\n');
+ }
+}
+
+static void help(void) {
+ printf("%s [OPTIONS...]\n\n"
+ "Show top control groups by their resource usage.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " -p --order=path Order by path\n"
+ " -t --order=tasks Order by number of tasks/processes\n"
+ " -c --order=cpu Order by CPU load (default)\n"
+ " -m --order=memory Order by memory load\n"
+ " -i --order=io Order by IO load\n"
+ " -r --raw Provide raw (not human-readable) numbers\n"
+ " --cpu=percentage Show CPU usage as percentage (default)\n"
+ " --cpu=time Show CPU usage as time\n"
+ " -P Count userspace processes instead of tasks (excl. kernel)\n"
+ " -k Count all processes instead of tasks (incl. kernel)\n"
+ " --recursive=BOOL Sum up process count recursively\n"
+ " -d --delay=DELAY Delay between updates\n"
+ " -n --iterations=N Run for N iterations before exiting\n"
+ " -b --batch Run in batch mode, accepting no input\n"
+ " --depth=DEPTH Maximum traversal depth (default: %u)\n"
+ " -M --machine= Show container\n"
+ , program_invocation_short_name, arg_depth);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_DEPTH,
+ ARG_CPU_TYPE,
+ ARG_ORDER,
+ ARG_RECURSIVE,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "delay", required_argument, NULL, 'd' },
+ { "iterations", required_argument, NULL, 'n' },
+ { "batch", no_argument, NULL, 'b' },
+ { "raw", no_argument, NULL, 'r' },
+ { "depth", required_argument, NULL, ARG_DEPTH },
+ { "cpu", optional_argument, NULL, ARG_CPU_TYPE },
+ { "order", required_argument, NULL, ARG_ORDER },
+ { "recursive", required_argument, NULL, ARG_RECURSIVE },
+ { "machine", required_argument, NULL, 'M' },
+ {}
+ };
+
+ bool recursive_unset = false;
+ int c, r;
+
+ assert(argc >= 1);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hptcmin:brd:kPM:", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ return version();
+
+ case ARG_CPU_TYPE:
+ if (optarg) {
+ if (streq(optarg, "time"))
+ arg_cpu_type = CPU_TIME;
+ else if (streq(optarg, "percentage"))
+ arg_cpu_type = CPU_PERCENT;
+ else {
+ log_error("Unknown argument to --cpu=: %s", optarg);
+ return -EINVAL;
+ }
+ } else
+ arg_cpu_type = CPU_TIME;
+
+ break;
+
+ case ARG_DEPTH:
+ r = safe_atou(optarg, &arg_depth);
+ if (r < 0) {
+ log_error("Failed to parse depth parameter.");
+ return -EINVAL;
+ }
+
+ break;
+
+ case 'd':
+ r = parse_sec(optarg, &arg_delay);
+ if (r < 0 || arg_delay <= 0) {
+ log_error("Failed to parse delay parameter.");
+ return -EINVAL;
+ }
+
+ break;
+
+ case 'n':
+ r = safe_atou(optarg, &arg_iterations);
+ if (r < 0) {
+ log_error("Failed to parse iterations parameter.");
+ return -EINVAL;
+ }
+
+ break;
+
+ case 'b':
+ arg_batch = true;
+ break;
+
+ case 'r':
+ arg_raw = true;
+ break;
+
+ case 'p':
+ arg_order = ORDER_PATH;
+ break;
+
+ case 't':
+ arg_order = ORDER_TASKS;
+ break;
+
+ case 'c':
+ arg_order = ORDER_CPU;
+ break;
+
+ case 'm':
+ arg_order = ORDER_MEMORY;
+ break;
+
+ case 'i':
+ arg_order = ORDER_IO;
+ break;
+
+ case ARG_ORDER:
+ if (streq(optarg, "path"))
+ arg_order = ORDER_PATH;
+ else if (streq(optarg, "tasks"))
+ arg_order = ORDER_TASKS;
+ else if (streq(optarg, "cpu"))
+ arg_order = ORDER_CPU;
+ else if (streq(optarg, "memory"))
+ arg_order = ORDER_MEMORY;
+ else if (streq(optarg, "io"))
+ arg_order = ORDER_IO;
+ else {
+ log_error("Invalid argument to --order=: %s", optarg);
+ return -EINVAL;
+ }
+ break;
+
+ case 'k':
+ arg_count = COUNT_ALL_PROCESSES;
+ break;
+
+ case 'P':
+ arg_count = COUNT_USERSPACE_PROCESSES;
+ break;
+
+ case ARG_RECURSIVE:
+ r = parse_boolean(optarg);
+ if (r < 0) {
+ log_error("Failed to parse --recursive= argument: %s", optarg);
+ return r;
+ }
+
+ arg_recursive = r;
+ recursive_unset = r == 0;
+ break;
+
+ case 'M':
+ arg_machine = optarg;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ if (optind < argc) {
+ log_error("Too many arguments.");
+ return -EINVAL;
+ }
+
+ if (recursive_unset && arg_count == COUNT_PIDS) {
+ log_error("Non-recursive counting is only supported when counting processes, not tasks. Use -P or -k.");
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+static const char* counting_what(void) {
+ if (arg_count == COUNT_PIDS)
+ return "tasks";
+ else if (arg_count == COUNT_ALL_PROCESSES)
+ return "all processes (incl. kernel)";
+ else
+ return "userspace processes (excl. kernel)";
+}
+
+static int get_cgroup_root(char **ret) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+ _cleanup_free_ char *unit = NULL, *path = NULL;
+ const char *m;
+ int r;
+
+ if (!arg_machine) {
+ r = cg_get_root_path(ret);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get root control group path: %m");
+
+ return 0;
+ }
+
+ m = strjoina("/run/systemd/machines/", arg_machine);
+ r = parse_env_file(m, NEWLINE, "SCOPE", &unit, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to load machine data: %m");
+
+ path = unit_dbus_path_from_name(unit);
+ if (!path)
+ return log_oom();
+
+ r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create bus connection: %m");
+
+ r = sd_bus_get_property_string(
+ bus,
+ "org.freedesktop.systemd1",
+ path,
+ unit_dbus_interface_from_name(unit),
+ "ControlGroup",
+ &error,
+ ret);
+ if (r < 0)
+ return log_error_errno(r, "Failed to query unit control group path: %s", bus_error_message(&error, r));
+
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ int r;
+ Hashmap *a = NULL, *b = NULL;
+ unsigned iteration = 0;
+ usec_t last_refresh = 0;
+ bool quit = false, immediate_refresh = false;
+ _cleanup_free_ char *root = NULL;
+ CGroupMask mask;
+
+ log_parse_environment();
+ log_open();
+
+ r = cg_mask_supported(&mask);
+ if (r < 0) {
+ log_error_errno(r, "Failed to determine supported controllers: %m");
+ goto finish;
+ }
+
+ arg_count = (mask & CGROUP_MASK_PIDS) ? COUNT_PIDS : COUNT_USERSPACE_PROCESSES;
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ r = get_cgroup_root(&root);
+ if (r < 0) {
+ log_error_errno(r, "Failed to get root control group path: %m");
+ goto finish;
+ }
+
+ a = hashmap_new(&string_hash_ops);
+ b = hashmap_new(&string_hash_ops);
+ if (!a || !b) {
+ r = log_oom();
+ goto finish;
+ }
+
+ signal(SIGWINCH, columns_lines_cache_reset);
+
+ if (arg_iterations == (unsigned) -1)
+ arg_iterations = on_tty() ? 0 : 1;
+
+ while (!quit) {
+ Hashmap *c;
+ usec_t t;
+ char key;
+ char h[FORMAT_TIMESPAN_MAX];
+
+ t = now(CLOCK_MONOTONIC);
+
+ if (t >= last_refresh + arg_delay || immediate_refresh) {
+
+ r = refresh(root, a, b, iteration++);
+ if (r < 0) {
+ log_error_errno(r, "Failed to refresh: %m");
+ goto finish;
+ }
+
+ group_hashmap_clear(b);
+
+ c = a;
+ a = b;
+ b = c;
+
+ last_refresh = t;
+ immediate_refresh = false;
+ }
+
+ display(b);
+
+ if (arg_iterations && iteration >= arg_iterations)
+ break;
+
+ if (!on_tty()) /* non-TTY: Empty newline as delimiter between polls */
+ fputs("\n", stdout);
+ fflush(stdout);
+
+ if (arg_batch)
+ (void) usleep(last_refresh + arg_delay - t);
+ else {
+ r = read_one_char(stdin, &key, last_refresh + arg_delay - t, NULL);
+ if (r == -ETIMEDOUT)
+ continue;
+ if (r < 0) {
+ log_error_errno(r, "Couldn't read key: %m");
+ goto finish;
+ }
+ }
+
+ if (on_tty()) { /* TTY: Clear any user keystroke */
+ fputs("\r \r", stdout);
+ fflush(stdout);
+ }
+
+ if (arg_batch)
+ continue;
+
+ switch (key) {
+
+ case ' ':
+ immediate_refresh = true;
+ break;
+
+ case 'q':
+ quit = true;
+ break;
+
+ case 'p':
+ arg_order = ORDER_PATH;
+ break;
+
+ case 't':
+ arg_order = ORDER_TASKS;
+ break;
+
+ case 'c':
+ arg_order = ORDER_CPU;
+ break;
+
+ case 'm':
+ arg_order = ORDER_MEMORY;
+ break;
+
+ case 'i':
+ arg_order = ORDER_IO;
+ break;
+
+ case '%':
+ arg_cpu_type = arg_cpu_type == CPU_TIME ? CPU_PERCENT : CPU_TIME;
+ break;
+
+ case 'k':
+ arg_count = arg_count != COUNT_ALL_PROCESSES ? COUNT_ALL_PROCESSES : COUNT_PIDS;
+ fprintf(stdout, "\nCounting: %s.", counting_what());
+ fflush(stdout);
+ sleep(1);
+ break;
+
+ case 'P':
+ arg_count = arg_count != COUNT_USERSPACE_PROCESSES ? COUNT_USERSPACE_PROCESSES : COUNT_PIDS;
+ fprintf(stdout, "\nCounting: %s.", counting_what());
+ fflush(stdout);
+ sleep(1);
+ break;
+
+ case 'r':
+ if (arg_count == COUNT_PIDS)
+ fprintf(stdout, "\n\aCannot toggle recursive counting, not available in task counting mode.");
+ else {
+ arg_recursive = !arg_recursive;
+ fprintf(stdout, "\nRecursive process counting: %s", yes_no(arg_recursive));
+ }
+ fflush(stdout);
+ sleep(1);
+ break;
+
+ case '+':
+ if (arg_delay < USEC_PER_SEC)
+ arg_delay += USEC_PER_MSEC*250;
+ else
+ arg_delay += USEC_PER_SEC;
+
+ fprintf(stdout, "\nIncreased delay to %s.", format_timespan(h, sizeof(h), arg_delay, 0));
+ fflush(stdout);
+ sleep(1);
+ break;
+
+ case '-':
+ if (arg_delay <= USEC_PER_MSEC*500)
+ arg_delay = USEC_PER_MSEC*250;
+ else if (arg_delay < USEC_PER_MSEC*1250)
+ arg_delay -= USEC_PER_MSEC*250;
+ else
+ arg_delay -= USEC_PER_SEC;
+
+ fprintf(stdout, "\nDecreased delay to %s.", format_timespan(h, sizeof(h), arg_delay, 0));
+ fflush(stdout);
+ sleep(1);
+ break;
+
+ case '?':
+ case 'h':
+
+#define ON ANSI_HIGHLIGHT
+#define OFF ANSI_NORMAL
+
+ fprintf(stdout,
+ "\t<" ON "p" OFF "> By path; <" ON "t" OFF "> By tasks/procs; <" ON "c" OFF "> By CPU; <" ON "m" OFF "> By memory; <" ON "i" OFF "> By I/O\n"
+ "\t<" ON "+" OFF "> Inc. delay; <" ON "-" OFF "> Dec. delay; <" ON "%%" OFF "> Toggle time; <" ON "SPACE" OFF "> Refresh\n"
+ "\t<" ON "P" OFF "> Toggle count userspace processes; <" ON "k" OFF "> Toggle count all processes\n"
+ "\t<" ON "r" OFF "> Count processes recursively; <" ON "q" OFF "> Quit");
+ fflush(stdout);
+ sleep(3);
+ break;
+
+ default:
+ if (key < ' ')
+ fprintf(stdout, "\nUnknown key '\\x%x'. Ignoring.", key);
+ else
+ fprintf(stdout, "\nUnknown key '%c'. Ignoring.", key);
+ fflush(stdout);
+ sleep(1);
+ break;
+ }
+ }
+
+ r = 0;
+
+finish:
+ group_hashmap_free(a);
+ group_hashmap_free(b);
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-10-30 14:15:41 +0000