-/*-*- Mode: C; c-basic-offset: 8 -*-*/
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
#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) {
return 0;
}
-void show_cgroup(const char *name, const char *prefix, unsigned columns) {
+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) {
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 (!startswith(name, "name=systemd:"))
- return;
+ if (n_columns <= 0)
+ n_columns = columns();
- if (asprintf(&fn, "/cgroup/systemd/%s/cgroup.procs", name + 13) < 0) {
- log_error("Out of memory");
- return;
- }
+ if (!prefix)
+ prefix = "";
- f = fopen(fn, "r");
- free(fn);
+ if ((r = cg_fix_path(path, &p)) < 0)
+ return r;
- if (!f)
- return;
+ r = asprintf(&fn, "%s/cgroup.procs", p);
+ free(p);
+
+ if (r < 0)
+ return -ENOMEM;
- while (!feof(f)) {
- unsigned long ul;
+ f = fopen(fn, "re");
+ free(fn);
- if (fscanf(f, "%lu", &ul) != 1)
- break;
+ if (!f)
+ return -errno;
- if (ul <= 0)
- continue;
+ while ((r = cg_read_pid(f, &pid)) > 0) {
if (n >= n_allocated) {
pid_t *npids;
n_allocated = MAX(16U, n*2U);
if (!(npids = realloc(pids, sizeof(pid_t) * n_allocated))) {
- log_error("Out of memory");
+ r = -ENOMEM;
goto finish;
}
}
assert(n < n_allocated);
- pids[n++] = (pid_t) ul;
+ pids[n++] = pid;
+
+ if (pid > biggest)
+ biggest = pid;
}
+ if (r < 0)
+ goto finish;
+
if (n > 0) {
unsigned i, m;
/* And sort */
qsort(pids, n, sizeof(pid_t), compare);
- if (!prefix)
- prefix = "";
-
- if (columns > 8)
- columns -= 8;
+ if (n_columns > 8)
+ n_columns -= 8;
else
- columns = 20;
-
- printf("%s\342\224\202\n", prefix);
+ n_columns = 20;
for (i = 0; i < n; i++) {
char *t = NULL;
- get_process_cmdline(pids[i], columns, &t);
+ get_process_cmdline(pids[i], n_columns, true, &t);
- printf("%s%s %5lu %s\n",
+ printf("%s%s %*lu %s\n",
prefix,
- i < n-1 ? "\342\224\234" : "\342\224\224",
- (unsigned long) pids[i], strna(t));
+ (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) {
+ 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);
+ 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);
+
+ 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);
+
+ 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);
+ }
+
+ 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) {
+ char *p;
+ int r;
+
+ assert(controller);
+ assert(path);
+
+ if ((r = cg_get_path(controller, path, NULL, &p)) < 0)
+ return r;
+
+ r = show_cgroup_by_path(p, prefix, n_columns);
+ free(p);
+
+ return r;
}