mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-14 02:25:56 +07:00
cgls: don't show empty cgroups by default
This commit is contained in:
parent
c7b5eb98e8
commit
c3175a7f40
2
TODO
2
TODO
@ -15,6 +15,8 @@ Bugfixes:
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Features:
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* suspend/hibernate/hybrid support, auto-suspend logic with idle hint
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* filter default cgroups in logind too
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* remove empty cgroups from cgls output
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@ -69,6 +69,9 @@
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of the control group the working directory refers
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to. Otherwise the full systemd control group hierarchy
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is shown.</para>
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<para>By default empty control cgroups are not
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shown.</para>
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</refsect1>
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<refsect1>
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@ -85,6 +88,13 @@
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text and exits.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--version</option></term>
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<listitem><para>Prints a short version
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string and exits.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--no-pager</option></term>
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@ -92,6 +102,14 @@
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pager.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--all</option></term>
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<listitem><para>Don't hide empty
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control groups in the
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outpout.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>-k</option></term>
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@ -31,16 +31,20 @@
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#include "log.h"
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#include "util.h"
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#include "pager.h"
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#include "build.h"
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static bool arg_no_pager = false;
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static bool arg_kernel_threads = false;
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static bool arg_all = false;
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static void help(void) {
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printf("%s [OPTIONS...] [CGROUP...]\n\n"
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"Recursively show control group contents.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --no-pager Do not pipe output into a pager\n"
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" -a --all Show all groups, including empty\n"
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" -k Include kernel threads in output\n",
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program_invocation_short_name);
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}
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@ -48,12 +52,15 @@ static void help(void) {
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_NO_PAGER = 0x100
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ARG_NO_PAGER = 0x100,
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ARG_VERSION
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
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{ "all", no_argument, NULL, 'a' },
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{ NULL, 0, NULL, 0 }
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};
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@ -62,7 +69,7 @@ static int parse_argv(int argc, char *argv[]) {
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assert(argc >= 1);
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assert(argv);
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while ((c = getopt_long(argc, argv, "hk", options, NULL)) >= 0) {
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while ((c = getopt_long(argc, argv, "hka", options, NULL)) >= 0) {
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switch (c) {
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@ -70,10 +77,20 @@ static int parse_argv(int argc, char *argv[]) {
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help();
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return 0;
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(DISTRIBUTION);
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puts(SYSTEMD_FEATURES);
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return 0;
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case ARG_NO_PAGER:
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arg_no_pager = true;
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break;
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case 'a':
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arg_all = true;
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break;
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case 'k':
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arg_kernel_threads = true;
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break;
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@ -114,7 +131,7 @@ int main(int argc, char *argv[]) {
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int q;
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printf("%s:\n", argv[i]);
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q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads);
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q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads, arg_all);
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if (q < 0)
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r = q;
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}
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@ -130,7 +147,7 @@ int main(int argc, char *argv[]) {
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if (path_startswith(p, "/sys/fs/cgroup")) {
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printf("Working Directory %s:\n", p);
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r = show_cgroup_by_path(p, NULL, 0, arg_kernel_threads);
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r = show_cgroup_by_path(p, NULL, 0, arg_kernel_threads, arg_all);
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} else {
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char *root = NULL;
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const char *t = NULL;
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@ -145,7 +162,7 @@ int main(int argc, char *argv[]) {
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t = root[0] ? root : "/";
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}
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r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, t, NULL, 0, arg_kernel_threads);
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r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, t, NULL, 0, arg_kernel_threads, arg_all);
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free(root);
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}
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@ -473,7 +473,7 @@ static void print_session_status_info(SessionStatusInfo *i) {
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else
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c = 0;
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show_cgroup_by_path(i->control_group, "\t\t ", c, false);
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show_cgroup_by_path(i->control_group, "\t\t ", c, false, arg_all);
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}
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}
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}
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@ -525,7 +525,7 @@ static void print_user_status_info(UserStatusInfo *i) {
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else
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c = 0;
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show_cgroup_by_path(i->control_group, "\t\t ", c, false);
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show_cgroup_by_path(i->control_group, "\t\t ", c, false, arg_all);
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}
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}
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}
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@ -160,7 +160,7 @@ finish:
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return r;
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}
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int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads) {
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int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, bool all) {
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DIR *d;
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char *last = NULL;
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char *p1 = NULL, *p2 = NULL, *fn = NULL, *gn = NULL;
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@ -173,15 +173,31 @@ int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns
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if (!prefix)
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prefix = "";
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if ((r = cg_fix_path(path, &fn)) < 0)
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r = cg_fix_path(path, &fn);
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if (r < 0)
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return r;
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if (!(d = opendir(fn))) {
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d = opendir(fn);
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if (!d) {
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free(fn);
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return -errno;
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}
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while ((r = cg_read_subgroup(d, &gn)) > 0) {
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char *k;
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r = asprintf(&k, "%s/%s", fn, gn);
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free(gn);
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if (r < 0) {
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r = -ENOMEM;
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goto finish;
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}
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if (!all && cg_is_empty_recursive(NULL, k, false) > 0) {
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free(k);
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continue;
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}
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if (!shown_pids) {
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show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads);
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@ -191,25 +207,20 @@ int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns
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if (last) {
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printf("%s\342\224\234 %s\n", prefix, file_name_from_path(last));
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if (!p1)
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if (!(p1 = strappend(prefix, "\342\224\202 "))) {
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if (!p1) {
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p1 = strappend(prefix, "\342\224\202 ");
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if (!p1) {
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free(k);
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r = -ENOMEM;
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goto finish;
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}
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}
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show_cgroup_by_path(last, p1, n_columns-2, kernel_threads);
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show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, all);
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free(last);
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last = NULL;
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}
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r = asprintf(&last, "%s/%s", fn, gn);
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free(gn);
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if (r < 0) {
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r = -ENOMEM;
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goto finish;
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}
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last = k;
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}
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if (r < 0)
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@ -221,13 +232,15 @@ int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns
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if (last) {
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printf("%s\342\224\224 %s\n", prefix, file_name_from_path(last));
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if (!p2)
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if (!(p2 = strappend(prefix, " "))) {
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if (!p2) {
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p2 = strappend(prefix, " ");
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if (!p2) {
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r = -ENOMEM;
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goto finish;
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}
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}
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show_cgroup_by_path(last, p2, n_columns-2, kernel_threads);
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show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, all);
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}
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r = 0;
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@ -243,7 +256,7 @@ finish:
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return r;
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}
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int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads) {
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int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, bool all) {
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char *p;
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int r;
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@ -254,7 +267,7 @@ int show_cgroup(const char *controller, const char *path, const char *prefix, un
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if (r < 0)
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return r;
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r = show_cgroup_by_path(p, prefix, n_columns, kernel_threads);
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r = show_cgroup_by_path(p, prefix, n_columns, kernel_threads, all);
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free(p);
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return r;
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@ -24,7 +24,7 @@
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#include <stdbool.h>
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int show_cgroup_by_path(const char *path, const char *prefix, unsigned columns, bool kernel_threads);
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int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned columns, bool kernel_threads);
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int show_cgroup_by_path(const char *path, const char *prefix, unsigned columns, bool kernel_threads, bool all);
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int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned columns, bool kernel_threads, bool all);
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#endif
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@ -40,11 +40,11 @@ int cg_enumerate_processes(const char *controller, const char *path, FILE **_f)
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int r;
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FILE *f;
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assert(controller);
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assert(path);
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assert(_f);
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if ((r = cg_get_path(controller, path, "cgroup.procs", &fs)) < 0)
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r = cg_get_path(controller, path, "cgroup.procs", &fs);
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if (r < 0)
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return r;
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f = fopen(fs, "re");
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@ -62,11 +62,11 @@ int cg_enumerate_tasks(const char *controller, const char *path, FILE **_f) {
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int r;
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FILE *f;
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assert(controller);
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assert(path);
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assert(_f);
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if ((r = cg_get_path(controller, path, "tasks", &fs)) < 0)
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r = cg_get_path(controller, path, "tasks", &fs);
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if (r < 0)
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return r;
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f = fopen(fs, "re");
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@ -106,13 +106,13 @@ int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d) {
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int r;
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DIR *d;
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assert(controller);
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assert(path);
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assert(_d);
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/* This is not recursive! */
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if ((r = cg_get_path(controller, path, NULL, &fs)) < 0)
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r = cg_get_path(controller, path, NULL, &fs);
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if (r < 0)
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return r;
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d = opendir(fs);
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@ -515,14 +515,24 @@ static const char *normalize_controller(const char *controller) {
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static int join_path(const char *controller, const char *path, const char *suffix, char **fs) {
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char *t;
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if (path && suffix)
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t = join("/sys/fs/cgroup/", controller, "/", path, "/", suffix, NULL);
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else if (path)
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t = join("/sys/fs/cgroup/", controller, "/", path, NULL);
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else if (suffix)
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t = join("/sys/fs/cgroup/", controller, "/", suffix, NULL);
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else
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t = join("/sys/fs/cgroup/", controller, NULL);
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if (!(controller || path))
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return -EINVAL;
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if (controller) {
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if (path && suffix)
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t = join("/sys/fs/cgroup/", controller, "/", path, "/", suffix, NULL);
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else if (path)
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t = join("/sys/fs/cgroup/", controller, "/", path, NULL);
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else if (suffix)
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t = join("/sys/fs/cgroup/", controller, "/", suffix, NULL);
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else
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t = join("/sys/fs/cgroup/", controller, NULL);
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} else {
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if (path && suffix)
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t = join(path, "/", suffix, NULL);
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else if (path)
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t = strdup(path);
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}
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if (!t)
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return -ENOMEM;
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@ -537,12 +547,8 @@ int cg_get_path(const char *controller, const char *path, const char *suffix, ch
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const char *p;
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static __thread bool good = false;
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assert(controller);
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assert(fs);
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if (isempty(controller))
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return -EINVAL;
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if (_unlikely_(!good)) {
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int r;
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@ -554,8 +560,7 @@ int cg_get_path(const char *controller, const char *path, const char *suffix, ch
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good = true;
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}
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p = normalize_controller(controller);
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p = controller ? normalize_controller(controller) : NULL;
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return join_path(p, path, suffix, fs);
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}
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@ -883,20 +888,22 @@ finish:
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}
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int cg_is_empty(const char *controller, const char *path, bool ignore_self) {
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pid_t pid = 0;
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pid_t pid = 0, self_pid;
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int r;
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FILE *f = NULL;
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bool found = false;
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assert(controller);
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assert(path);
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if ((r = cg_enumerate_tasks(controller, path, &f)) < 0)
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r = cg_enumerate_tasks(controller, path, &f);
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if (r < 0)
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return r == -ENOENT ? 1 : r;
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self_pid = getpid();
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while ((r = cg_read_pid(f, &pid)) > 0) {
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if (ignore_self && pid == getpid())
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if (ignore_self && pid == self_pid)
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continue;
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found = true;
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@ -916,13 +923,14 @@ int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_
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DIR *d = NULL;
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char *fn;
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assert(controller);
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assert(path);
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if ((r = cg_is_empty(controller, path, ignore_self)) <= 0)
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r = cg_is_empty(controller, path, ignore_self);
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if (r <= 0)
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return r;
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if ((r = cg_enumerate_subgroups(controller, path, &d)) < 0)
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r = cg_enumerate_subgroups(controller, path, &d);
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if (r < 0)
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return r == -ENOENT ? 1 : r;
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while ((r = cg_read_subgroup(d, &fn)) > 0) {
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@ -2383,7 +2383,7 @@ static void print_status_info(UnitStatusInfo *i) {
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else
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c = 0;
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show_cgroup_by_path(i->default_control_group, "\t\t ", c, false);
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show_cgroup_by_path(i->default_control_group, "\t\t ", c, false, arg_all);
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}
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}
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