0c69794138
These lines are generally out-of-date, incomplete and unnecessary. With SPDX and git repository much more accurate and fine grained information about licensing and authorship is available, hence let's drop the per-file copyright notice. Of course, removing copyright lines of others is problematic, hence this commit only removes my own lines and leaves all others untouched. It might be nicer if sooner or later those could go away too, making git the only and accurate source of authorship information.
375 lines
10 KiB
C
375 lines
10 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include <dirent.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "alloc-util.h"
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#include "bus-error.h"
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#include "bus-util.h"
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#include "cgroup-show.h"
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#include "cgroup-util.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "format-util.h"
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#include "locale-util.h"
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#include "macro.h"
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#include "output-mode.h"
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#include "path-util.h"
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#include "process-util.h"
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#include "string-util.h"
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#include "terminal-util.h"
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#include "unit-name.h"
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static void show_pid_array(
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pid_t pids[],
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unsigned n_pids,
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const char *prefix,
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unsigned n_columns,
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bool extra,
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bool more,
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OutputFlags flags) {
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unsigned i, j, pid_width;
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if (n_pids == 0)
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return;
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qsort(pids, n_pids, sizeof(pid_t), pid_compare_func);
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/* Filter duplicates */
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for (j = 0, i = 1; i < n_pids; i++) {
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if (pids[i] == pids[j])
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continue;
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pids[++j] = pids[i];
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}
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n_pids = j + 1;
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pid_width = DECIMAL_STR_WIDTH(pids[j]);
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if (flags & OUTPUT_FULL_WIDTH)
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n_columns = 0;
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else {
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if (n_columns > pid_width+2)
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n_columns -= pid_width+2;
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else
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n_columns = 20;
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}
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for (i = 0; i < n_pids; i++) {
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_cleanup_free_ char *t = NULL;
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(void) get_process_cmdline(pids[i], n_columns, true, &t);
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if (extra)
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printf("%s%s ", prefix, special_glyph(TRIANGULAR_BULLET));
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else
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printf("%s%s", prefix, special_glyph(((more || i < n_pids-1) ? TREE_BRANCH : TREE_RIGHT)));
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printf("%*"PID_PRI" %s\n", pid_width, pids[i], strna(t));
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}
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}
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static int show_cgroup_one_by_path(
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const char *path,
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const char *prefix,
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unsigned n_columns,
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bool more,
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OutputFlags flags) {
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char *fn;
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_cleanup_fclose_ FILE *f = NULL;
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size_t n = 0, n_allocated = 0;
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_cleanup_free_ pid_t *pids = NULL;
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_cleanup_free_ char *p = NULL;
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pid_t pid;
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int r;
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r = cg_mangle_path(path, &p);
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if (r < 0)
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return r;
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fn = strjoina(p, "/cgroup.procs");
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f = fopen(fn, "re");
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if (!f)
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return -errno;
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while ((r = cg_read_pid(f, &pid)) > 0) {
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if (!(flags & OUTPUT_KERNEL_THREADS) && is_kernel_thread(pid) > 0)
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continue;
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if (!GREEDY_REALLOC(pids, n_allocated, n + 1))
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return -ENOMEM;
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assert(n < n_allocated);
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pids[n++] = pid;
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}
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if (r < 0)
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return r;
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show_pid_array(pids, n, prefix, n_columns, false, more, flags);
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return 0;
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}
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int show_cgroup_by_path(
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const char *path,
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const char *prefix,
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unsigned n_columns,
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OutputFlags flags) {
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_cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL;
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_cleanup_closedir_ DIR *d = NULL;
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char *gn = NULL;
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bool shown_pids = false;
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int r;
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assert(path);
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if (n_columns <= 0)
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n_columns = columns();
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prefix = strempty(prefix);
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r = cg_mangle_path(path, &fn);
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if (r < 0)
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return r;
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d = opendir(fn);
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if (!d)
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return -errno;
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while ((r = cg_read_subgroup(d, &gn)) > 0) {
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_cleanup_free_ char *k = NULL;
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k = strjoin(fn, "/", gn);
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free(gn);
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if (!k)
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return -ENOMEM;
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if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k) > 0)
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continue;
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if (!shown_pids) {
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show_cgroup_one_by_path(path, prefix, n_columns, true, flags);
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shown_pids = true;
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}
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if (last) {
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printf("%s%s%s\n", prefix, special_glyph(TREE_BRANCH), cg_unescape(basename(last)));
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if (!p1) {
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p1 = strappend(prefix, special_glyph(TREE_VERTICAL));
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if (!p1)
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return -ENOMEM;
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}
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show_cgroup_by_path(last, p1, n_columns-2, flags);
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free(last);
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}
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last = TAKE_PTR(k);
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}
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if (r < 0)
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return r;
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if (!shown_pids)
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show_cgroup_one_by_path(path, prefix, n_columns, !!last, flags);
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if (last) {
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printf("%s%s%s\n", prefix, special_glyph(TREE_RIGHT), cg_unescape(basename(last)));
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if (!p2) {
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p2 = strappend(prefix, " ");
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if (!p2)
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return -ENOMEM;
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}
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show_cgroup_by_path(last, p2, n_columns-2, flags);
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}
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return 0;
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}
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int show_cgroup(const char *controller,
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const char *path,
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const char *prefix,
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unsigned n_columns,
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OutputFlags flags) {
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_cleanup_free_ char *p = NULL;
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int r;
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assert(path);
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r = cg_get_path(controller, path, NULL, &p);
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if (r < 0)
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return r;
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return show_cgroup_by_path(p, prefix, n_columns, flags);
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}
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static int show_extra_pids(
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const char *controller,
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const char *path,
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const char *prefix,
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unsigned n_columns,
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const pid_t pids[],
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unsigned n_pids,
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OutputFlags flags) {
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_cleanup_free_ pid_t *copy = NULL;
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unsigned i, j;
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int r;
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assert(path);
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if (n_pids <= 0)
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return 0;
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if (n_columns <= 0)
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n_columns = columns();
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prefix = strempty(prefix);
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copy = new(pid_t, n_pids);
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if (!copy)
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return -ENOMEM;
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for (i = 0, j = 0; i < n_pids; i++) {
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_cleanup_free_ char *k = NULL;
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r = cg_pid_get_path(controller, pids[i], &k);
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if (r < 0)
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return r;
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if (path_startswith(k, path))
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continue;
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copy[j++] = pids[i];
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}
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show_pid_array(copy, j, prefix, n_columns, true, false, flags);
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return 0;
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}
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int show_cgroup_and_extra(
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const char *controller,
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const char *path,
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const char *prefix,
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unsigned n_columns,
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const pid_t extra_pids[],
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unsigned n_extra_pids,
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OutputFlags flags) {
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int r;
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assert(path);
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r = show_cgroup(controller, path, prefix, n_columns, flags);
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if (r < 0)
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return r;
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return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
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}
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int show_cgroup_and_extra_by_spec(
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const char *spec,
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const char *prefix,
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unsigned n_columns,
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const pid_t extra_pids[],
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unsigned n_extra_pids,
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OutputFlags flags) {
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_cleanup_free_ char *controller = NULL, *path = NULL;
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int r;
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assert(spec);
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r = cg_split_spec(spec, &controller, &path);
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if (r < 0)
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return r;
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return show_cgroup_and_extra(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
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}
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int show_cgroup_get_unit_path_and_warn(
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sd_bus *bus,
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const char *unit,
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char **ret) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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_cleanup_free_ char *path = NULL;
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int r;
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path = unit_dbus_path_from_name(unit);
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if (!path)
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return log_oom();
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r = sd_bus_get_property_string(
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bus,
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"org.freedesktop.systemd1",
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path,
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unit_dbus_interface_from_name(unit),
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"ControlGroup",
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&error,
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ret);
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if (r < 0)
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return log_error_errno(r, "Failed to query unit control group path: %s",
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bus_error_message(&error, r));
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return 0;
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}
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int show_cgroup_get_path_and_warn(
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const char *machine,
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const char *prefix,
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char **ret) {
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int r;
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_cleanup_free_ char *root = NULL;
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if (machine) {
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_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
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_cleanup_free_ char *unit = NULL;
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const char *m;
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m = strjoina("/run/systemd/machines/", machine);
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r = parse_env_file(NULL, m, NEWLINE, "SCOPE", &unit, NULL);
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if (r < 0)
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return log_error_errno(r, "Failed to load machine data: %m");
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r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
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if (r < 0)
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return log_error_errno(r, "Failed to create bus connection: %m");
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r = show_cgroup_get_unit_path_and_warn(bus, unit, &root);
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if (r < 0)
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return r;
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} else {
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r = cg_get_root_path(&root);
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if (r == -ENOMEDIUM)
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return log_error_errno(r, "Failed to get root control group path.\n"
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"No cgroup filesystem mounted on /sys/fs/cgroup");
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else if (r < 0)
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return log_error_errno(r, "Failed to get root control group path: %m");
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}
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if (prefix) {
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char *t;
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t = strjoin(root, prefix);
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if (!t)
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return log_oom();
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*ret = t;
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} else
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*ret = TAKE_PTR(root);
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return 0;
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}
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