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journalctl: add --image= switch

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This commit is contained in:
Lennart Poettering 2020-07-28 19:18:05 +02:00
parent 0c3ee12737
commit cc171228d4
1 changed files with 36 additions and 3 deletions
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39
src/journal/journalctl.c
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@ -31,6 +31,7 @@
#include "chattr-util.h"
#include "def.h"
#include "device-private.h"
#include "dissect-image.h"
#include "fd-util.h"
#include "fileio.h"
#include "format-util.h"
@ -51,6 +52,7 @@
#include "logs-show.h"
#include "memory-util.h"
#include "mkdir.h"
#include "mount-util.h"
#include "mountpoint-util.h"
#include "nulstr-util.h"
#include "pager.h"
@ -121,6 +123,7 @@ static bool arg_reverse = false;
static int arg_journal_type = 0;
static int arg_namespace_flags = 0;
static char *arg_root = NULL;
static char *arg_image = NULL;
static const char *arg_machine = NULL;
static const char *arg_namespace = NULL;
static uint64_t arg_vacuum_size = 0;
@ -375,6 +378,7 @@ static int help(void) {
" -D --directory=PATH Show journal files from directory\n"
" --file=PATH Show journal file\n"
" --root=ROOT Operate on files below a root directory\n"
" --image=IMAGE Operate on files in filesystem image\n"
" --namespace=NAMESPACE Show journal data from specified namespace\n"
" --interval=TIME Time interval for changing the FSS sealing key\n"
" --verify-key=KEY Specify FSS verification key\n"
@ -422,6 +426,7 @@ static int parse_argv(int argc, char *argv[]) {
ARG_USER,
ARG_SYSTEM,
ARG_ROOT,
ARG_IMAGE,
ARG_HEADER,
ARG_FACILITY,
ARG_SETUP_KEYS,
@ -478,6 +483,7 @@ static int parse_argv(int argc, char *argv[]) {
{ "directory", required_argument, NULL, 'D' },
{ "file", required_argument, NULL, ARG_FILE },
{ "root", required_argument, NULL, ARG_ROOT },
{ "image", required_argument, NULL, ARG_IMAGE },
{ "header", no_argument, NULL, ARG_HEADER },
{ "identifier", required_argument, NULL, 't' },
{ "priority", required_argument, NULL, 'p' },
@ -713,7 +719,13 @@ static int parse_argv(int argc, char *argv[]) {
break;
case ARG_ROOT:
r = parse_path_argument_and_warn(optarg, true, &arg_root);
r = parse_path_argument_and_warn(optarg, /* suppress_root= */ true, &arg_root);
if (r < 0)
return r;
break;
case ARG_IMAGE:
r = parse_path_argument_and_warn(optarg, /* suppress_root= */ false, &arg_image);
if (r < 0)
return r;
break;
@ -1043,8 +1055,8 @@ static int parse_argv(int argc, char *argv[]) {
if (arg_follow && !arg_no_tail && !arg_since && arg_lines == ARG_LINES_DEFAULT)
arg_lines = 10;
if (!!arg_directory + !!arg_file + !!arg_machine + !!arg_root > 1) {
log_error("Please specify at most one of -D/--directory=, --file=, -M/--machine=, --root.");
if (!!arg_directory + !!arg_file + !!arg_machine + !!arg_root + !!arg_image > 1) {
log_error("Please specify at most one of -D/--directory=, --file=, -M/--machine=, --root=, --image=.");
return -EINVAL;
}
@ -2084,6 +2096,9 @@ static int wait_for_change(sd_journal *j, int poll_fd) {
}
int main(int argc, char *argv[]) {
_cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL;
_cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL;
_cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL;
bool previous_boot_id_valid = false, first_line = true, ellipsized = false, need_seek = false;
bool use_cursor = false, after_cursor = false;
_cleanup_(sd_journal_closep) sd_journal *j = NULL;
@ -2101,6 +2116,24 @@ int main(int argc, char *argv[]) {
if (r <= 0)
goto finish;
if (arg_image) {
assert(!arg_root);
r = mount_image_privately_interactively(
arg_image,
DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_VALIDATE_OS|DISSECT_IMAGE_RELAX_VAR_CHECK|
(arg_action == ACTION_UPDATE_CATALOG ? DISSECT_IMAGE_FSCK : DISSECT_IMAGE_READ_ONLY),
&unlink_dir,
&loop_device,
&decrypted_image);
if (r < 0)
return r;
arg_root = strdup(unlink_dir);
if (!arg_root)
return log_oom();
}
signal(SIGWINCH, columns_lines_cache_reset);
sigbus_install();