+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 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 <stdio.h>
-#include <string.h>
-#include <dirent.h>
-#include <errno.h>
-
-#include "util.h"
-#include "macro.h"
-#include "cgroup-util.h"
-#include "cgroup-show.h"
-
-static int compare(const void *a, const void *b) {
- const pid_t *p = a, *q = b;
-
- if (*p < *q)
- return -1;
- if (*p > *q)
- return 1;
- return 0;
-}
-
-static unsigned ilog10(unsigned long ul) {
- int n = 0;
-
- while (ul > 0) {
- n++;
- ul /= 10;
- }
-
- return n;
-}
-
-static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads) {
- char *fn;
- FILE *f;
- size_t n = 0, n_allocated = 0;
- pid_t *pids = NULL;
- char *p;
- pid_t pid, biggest = 0;
- int r;
-
- if (n_columns <= 0)
- n_columns = columns();
-
- if (!prefix)
- prefix = "";
-
- if ((r = cg_fix_path(path, &p)) < 0)
- return r;
-
- r = asprintf(&fn, "%s/cgroup.procs", p);
- free(p);
-
- if (r < 0)
- return -ENOMEM;
-
- f = fopen(fn, "re");
- free(fn);
-
- if (!f)
- return -errno;
-
- while ((r = cg_read_pid(f, &pid)) > 0) {
-
- if (!kernel_threads && is_kernel_thread(pid) > 0)
- continue;
-
- if (n >= n_allocated) {
- pid_t *npids;
-
- n_allocated = MAX(16U, n*2U);
-
- if (!(npids = realloc(pids, sizeof(pid_t) * n_allocated))) {
- r = -ENOMEM;
- goto finish;
- }
-
- pids = npids;
- }
-
- assert(n < n_allocated);
- pids[n++] = pid;
-
- if (pid > biggest)
- biggest = pid;
- }
-
- if (r < 0)
- goto finish;
-
- if (n > 0) {
- unsigned i, m;
-
- /* Filter duplicates */
- m = 0;
- for (i = 0; i < n; i++) {
- unsigned j;
-
- for (j = i+1; j < n; j++)
- if (pids[i] == pids[j])
- break;
-
- if (j >= n)
- pids[m++] = pids[i];
- }
- n = m;
-
- /* And sort */
- qsort(pids, n, sizeof(pid_t), compare);
-
- if (n_columns > 8)
- n_columns -= 8;
- else
- n_columns = 20;
-
- for (i = 0; i < n; i++) {
- char *t = NULL;
-
- get_process_cmdline(pids[i], n_columns, true, &t);
-
- printf("%s%s %*lu %s\n",
- prefix,
- (more || i < n-1) ? "\342\224\234" : "\342\224\224",
- (int) ilog10(biggest),
- (unsigned long) pids[i],
- strna(t));
-
- free(t);
- }
- }
-
- r = 0;
-
-finish:
- free(pids);
-
- if (f)
- fclose(f);
-
- return r;
-}
-
-int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads) {
- DIR *d;
- char *last = NULL;
- char *p1 = NULL, *p2 = NULL, *fn = NULL, *gn = NULL;
- bool shown_pids = false;
- int r;
-
- if (n_columns <= 0)
- n_columns = columns();
-
- if (!prefix)
- prefix = "";
-
- if ((r = cg_fix_path(path, &fn)) < 0)
- return r;
-
- if (!(d = opendir(fn))) {
- free(fn);
- return -errno;
- }
-
- while ((r = cg_read_subgroup(d, &gn)) > 0) {
-
- if (!shown_pids) {
- show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads);
- shown_pids = true;
- }
-
- if (last) {
- printf("%s\342\224\234 %s\n", prefix, file_name_from_path(last));
-
- if (!p1)
- if (!(p1 = strappend(prefix, "\342\224\202 "))) {
- r = -ENOMEM;
- goto finish;
- }
-
- show_cgroup_by_path(last, p1, n_columns-2, kernel_threads);
-
- free(last);
- last = NULL;
- }
-
- r = asprintf(&last, "%s/%s", fn, gn);
- free(gn);
-
- if (r < 0) {
- r = -ENOMEM;
- goto finish;
- }
- }
-
- if (r < 0)
- goto finish;
-
- if (!shown_pids)
- show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads);
-
- if (last) {
- printf("%s\342\224\224 %s\n", prefix, file_name_from_path(last));
-
- if (!p2)
- if (!(p2 = strappend(prefix, " "))) {
- r = -ENOMEM;
- goto finish;
- }
-
- show_cgroup_by_path(last, p2, n_columns-2, kernel_threads);
- }
-
- r = 0;
-
-finish:
- free(p1);
- free(p2);
- free(last);
- free(fn);
-
- closedir(d);
-
- return r;
-}
-
-int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads) {
- char *p;
- int r;
-
- assert(controller);
- assert(path);
-
- r = cg_get_path(controller, path, NULL, &p);
- if (r < 0)
- return r;
-
- r = show_cgroup_by_path(p, prefix, n_columns, kernel_threads);
- free(p);
-
- return r;
-}
~ianmdlvl / elogind.git / blobdiff