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https://github.com/systemd/systemd
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journalctl: implement --list-namespaces
Apart from being useful on its own, this will be used in the following commit for shell completions.
This commit is contained in:
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35a7dd4834
commit
68f66a1713
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@ -45,7 +45,8 @@ _journalctl() {
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--version --list-catalog --update-catalog --list-boots
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--show-cursor --dmesg -k --pager-end -e -r --reverse
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--utc -x --catalog --no-full --force --dump-catalog
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--flush --rotate --sync --no-hostname -N --fields'
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--flush --rotate --sync --no-hostname -N --fields
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--list-namespaces'
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[ARG]='-b --boot -D --directory --file -F --field -t --identifier
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-T --exclude-identifier --facility -M --machine -o --output
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-u --unit --user-unit -p --priority --root --case-sensitive'
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@ -131,6 +131,7 @@ _arguments -s \
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'--header[Show journal header information]' \
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'--interval=[Time interval for changing the FSS sealing key]:time interval' \
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'--list-catalog[List messages in catalog]' \
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'--list-namespaces[List available journal namespaces]' \
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'--new-id128[Generate a new 128 Bit ID]' \
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'--rotate[Request immediate rotation of the journal files]' \
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'--setup-keys[Generate a new FSS key pair]' \
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@ -28,6 +28,7 @@
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#include "chattr-util.h"
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#include "constants.h"
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#include "devnum-util.h"
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#include "dirent-util.h"
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#include "dissect-image.h"
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#include "fd-util.h"
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#include "fileio.h"
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@ -175,6 +176,7 @@ static enum {
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ACTION_ROTATE_AND_VACUUM,
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ACTION_LIST_FIELDS,
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ACTION_LIST_FIELD_NAMES,
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ACTION_LIST_NAMESPACES,
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} arg_action = ACTION_SHOW;
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static int add_matches_for_device(sd_journal *j, const char *devpath) {
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@ -491,6 +493,7 @@ static int parse_argv(int argc, char *argv[]) {
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ARG_NO_HOSTNAME,
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ARG_OUTPUT_FIELDS,
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ARG_NAMESPACE,
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ARG_LIST_NAMESPACES,
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};
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static const struct option options[] = {
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@ -561,6 +564,7 @@ static int parse_argv(int argc, char *argv[]) {
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{ "no-hostname", no_argument, NULL, ARG_NO_HOSTNAME },
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{ "output-fields", required_argument, NULL, ARG_OUTPUT_FIELDS },
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{ "namespace", required_argument, NULL, ARG_NAMESPACE },
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{ "list-namespaces", no_argument, NULL, ARG_LIST_NAMESPACES },
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{}
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};
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@ -727,6 +731,10 @@ static int parse_argv(int argc, char *argv[]) {
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break;
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case ARG_LIST_NAMESPACES:
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arg_action = ACTION_LIST_NAMESPACES;
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break;
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case 'D':
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arg_directory = optarg;
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break;
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@ -1229,6 +1237,64 @@ static int add_matches(sd_journal *j, char **args) {
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return 0;
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}
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static int list_namespaces(const char *root) {
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_cleanup_(table_unrefp) Table *table = NULL;
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sd_id128_t machine;
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char machine_id[SD_ID128_STRING_MAX];
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int r;
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r = sd_id128_get_machine(&machine);
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if (r < 0)
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return log_error_errno(r, "Failed to get machine ID: %m");
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sd_id128_to_string(machine, machine_id);
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table = table_new("namespace");
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if (!table)
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return log_oom();
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(void) table_set_sort(table, (size_t) 0);
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FOREACH_STRING(dir, "/var/log/journal", "/run/log/journal") {
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_cleanup_free_ char *path = NULL;
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_cleanup_closedir_ DIR *dirp = NULL;
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path = path_join(root, dir);
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if (!path)
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return log_oom();
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dirp = opendir(path);
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if (!dirp) {
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log_debug_errno(errno, "Failed to open directory %s, ignoring: %m", path);
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continue;
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}
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FOREACH_DIRENT(de, dirp, return log_error_errno(errno, "Failed to iterate through %s: %m", path)) {
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char *dot;
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if (!startswith(de->d_name, machine_id))
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continue;
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dot = strchr(de->d_name, '.');
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if (!dot)
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continue;
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if (!log_namespace_name_valid(dot + 1))
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continue;
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r = table_add_cell(table, NULL, TABLE_STRING, dot + 1);
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if (r < 0)
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return table_log_add_error(r);
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}
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}
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r = table_print_with_pager(table, arg_json_format_flags, arg_pager_flags, !arg_quiet);
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if (r < 0)
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return table_log_print_error(r);
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return 0;
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}
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static int list_boots(sd_journal *j) {
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_cleanup_(table_unrefp) Table *table = NULL;
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_cleanup_free_ BootId *boots = NULL;
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@ -2288,6 +2354,9 @@ static int run(int argc, char *argv[]) {
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case ACTION_ROTATE:
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return rotate();
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case ACTION_LIST_NAMESPACES:
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return list_namespaces(arg_root);
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case ACTION_SHOW:
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case ACTION_PRINT_HEADER:
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case ACTION_VERIFY:
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@ -4,12 +4,20 @@ set -eux
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systemd-analyze log-level debug
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journalctl --list-namespaces -o json | jq .
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systemd-run --wait -p LogNamespace=foobar echo "hello world"
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systemd-run --wait -p LogNamespace=foobaz echo "hello world"
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journalctl --namespace=foobar --sync
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journalctl -o cat --namespace=foobar >/tmp/hello-world
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journalctl -o cat >/tmp/no-hello-world
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journalctl --list-namespaces | grep foobar
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journalctl --list-namespaces | grep foobaz
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journalctl --list-namespaces -o json | jq .
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[[ "$(journalctl --root=/tmp --list-namespaces --quiet)" == "" ]]
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grep "^hello world$" /tmp/hello-world
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(! grep "^hello world$" /tmp/no-hello-world)
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