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git.ipfire.org Git - thirdparty/systemd.git/blob - src/shared/cgroup-show.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include "alloc-util.h"
30 #include "cgroup-show.h"
31 #include "cgroup-util.h"
33 #include "formats-util.h"
34 #include "locale-util.h"
36 #include "output-mode.h"
37 #include "path-util.h"
38 #include "process-util.h"
39 #include "string-util.h"
40 #include "terminal-util.h"
42 static int compare(const void *a
, const void *b
) {
43 const pid_t
*p
= a
, *q
= b
;
52 static void show_pid_array(pid_t pids
[], unsigned n_pids
, const char *prefix
, unsigned n_columns
, bool extra
, bool more
, bool kernel_threads
, OutputFlags flags
) {
53 unsigned i
, j
, pid_width
;
58 qsort(pids
, n_pids
, sizeof(pid_t
), compare
);
60 /* Filter duplicates */
61 for (j
= 0, i
= 1; i
< n_pids
; i
++) {
62 if (pids
[i
] == pids
[j
])
67 pid_width
= DECIMAL_STR_WIDTH(pids
[j
]);
69 if (flags
& OUTPUT_FULL_WIDTH
)
72 if (n_columns
> pid_width
+2)
73 n_columns
-= pid_width
+2;
77 for (i
= 0; i
< n_pids
; i
++) {
78 _cleanup_free_
char *t
= NULL
;
80 get_process_cmdline(pids
[i
], n_columns
, true, &t
);
83 printf("%s%s ", prefix
, draw_special_char(DRAW_TRIANGULAR_BULLET
));
85 printf("%s%s", prefix
, draw_special_char(((more
|| i
< n_pids
-1) ? DRAW_TREE_BRANCH
: DRAW_TREE_RIGHT
)));
87 printf("%*"PID_PRI
" %s\n", pid_width
, pids
[i
], strna(t
));
92 static int show_cgroup_one_by_path(const char *path
, const char *prefix
, unsigned n_columns
, bool more
, bool kernel_threads
, OutputFlags flags
) {
94 _cleanup_fclose_
FILE *f
= NULL
;
95 size_t n
= 0, n_allocated
= 0;
96 _cleanup_free_ pid_t
*pids
= NULL
;
97 _cleanup_free_
char *p
= NULL
;
101 r
= cg_mangle_path(path
, &p
);
105 fn
= strjoina(p
, "/cgroup.procs");
110 while ((r
= cg_read_pid(f
, &pid
)) > 0) {
112 if (!kernel_threads
&& is_kernel_thread(pid
) > 0)
115 if (!GREEDY_REALLOC(pids
, n_allocated
, n
+ 1))
118 assert(n
< n_allocated
);
125 show_pid_array(pids
, n
, prefix
, n_columns
, false, more
, kernel_threads
, flags
);
130 int show_cgroup_by_path(const char *path
, const char *prefix
, unsigned n_columns
, bool kernel_threads
, OutputFlags flags
) {
131 _cleanup_free_
char *fn
= NULL
, *p1
= NULL
, *last
= NULL
, *p2
= NULL
;
132 _cleanup_closedir_
DIR *d
= NULL
;
134 bool shown_pids
= false;
140 n_columns
= columns();
145 r
= cg_mangle_path(path
, &fn
);
153 while ((r
= cg_read_subgroup(d
, &gn
)) > 0) {
154 _cleanup_free_
char *k
= NULL
;
156 k
= strjoin(fn
, "/", gn
, NULL
);
161 if (!(flags
& OUTPUT_SHOW_ALL
) && cg_is_empty_recursive(NULL
, k
) > 0)
165 show_cgroup_one_by_path(path
, prefix
, n_columns
, true, kernel_threads
, flags
);
170 printf("%s%s%s\n", prefix
, draw_special_char(DRAW_TREE_BRANCH
), cg_unescape(basename(last
)));
173 p1
= strappend(prefix
, draw_special_char(DRAW_TREE_VERTICAL
));
178 show_cgroup_by_path(last
, p1
, n_columns
-2, kernel_threads
, flags
);
190 show_cgroup_one_by_path(path
, prefix
, n_columns
, !!last
, kernel_threads
, flags
);
193 printf("%s%s%s\n", prefix
, draw_special_char(DRAW_TREE_RIGHT
), cg_unescape(basename(last
)));
196 p2
= strappend(prefix
, " ");
201 show_cgroup_by_path(last
, p2
, n_columns
-2, kernel_threads
, flags
);
207 int show_cgroup(const char *controller
, const char *path
, const char *prefix
, unsigned n_columns
, bool kernel_threads
, OutputFlags flags
) {
208 _cleanup_free_
char *p
= NULL
;
213 r
= cg_get_path(controller
, path
, NULL
, &p
);
217 return show_cgroup_by_path(p
, prefix
, n_columns
, kernel_threads
, flags
);
220 static int show_extra_pids(const char *controller
, const char *path
, const char *prefix
, unsigned n_columns
, const pid_t pids
[], unsigned n_pids
, OutputFlags flags
) {
221 _cleanup_free_ pid_t
*copy
= NULL
;
231 n_columns
= columns();
233 prefix
= strempty(prefix
);
235 copy
= new(pid_t
, n_pids
);
239 for (i
= 0, j
= 0; i
< n_pids
; i
++) {
240 _cleanup_free_
char *k
= NULL
;
242 r
= cg_pid_get_path(controller
, pids
[i
], &k
);
246 if (path_startswith(k
, path
))
252 show_pid_array(copy
, j
, prefix
, n_columns
, true, false, false, flags
);
257 int show_cgroup_and_extra(const char *controller
, const char *path
, const char *prefix
, unsigned n_columns
, bool kernel_threads
, const pid_t extra_pids
[], unsigned n_extra_pids
, OutputFlags flags
) {
262 r
= show_cgroup(controller
, path
, prefix
, n_columns
, kernel_threads
, flags
);
266 return show_extra_pids(controller
, path
, prefix
, n_columns
, extra_pids
, n_extra_pids
, flags
);
269 int show_cgroup_and_extra_by_spec(const char *spec
, const char *prefix
, unsigned n_columns
, bool kernel_threads
, const pid_t extra_pids
[], unsigned n_extra_pids
, OutputFlags flags
) {
270 _cleanup_free_
char *controller
= NULL
, *path
= NULL
;
275 r
= cg_split_spec(spec
, &controller
, &path
);
279 return show_cgroup_and_extra(controller
, path
, prefix
, n_columns
, kernel_threads
, extra_pids
, n_extra_pids
, flags
);