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-rw-r--r--src/journal/journalctl.c544
1 files changed, 544 insertions, 0 deletions
diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
new file mode 100644
index 0000000000..701518244c
--- /dev/null
+++ b/src/journal/journalctl.c
@@ -0,0 +1,544 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2011 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <errno.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/poll.h>
+#include <time.h>
+#include <getopt.h>
+
+#include "sd-journal.h"
+#include "log.h"
+#include "util.h"
+#include "build.h"
+#include "pager.h"
+
+#define PRINT_THRESHOLD 128
+
+static enum {
+ OUTPUT_SHORT,
+ OUTPUT_VERBOSE,
+ OUTPUT_EXPORT,
+ OUTPUT_JSON,
+ _OUTPUT_MAX
+} arg_output = OUTPUT_SHORT;
+
+static bool arg_follow = false;
+static bool arg_show_all = false;
+static bool arg_no_pager = false;
+
+static bool contains_unprintable(const void *p, size_t l) {
+ const char *j;
+
+ for (j = p; j < (const char *) p + l; j++)
+ if (*j < ' ' || *j >= 127)
+ return true;
+
+ return false;
+}
+
+static int output_short(sd_journal *j, unsigned line) {
+ int r;
+ uint64_t realtime;
+ time_t t;
+ struct tm tm;
+ char buf[64];
+ const void *data;
+ size_t length;
+ size_t n = 0;
+
+ assert(j);
+
+ r = sd_journal_get_realtime_usec(j, &realtime);
+ if (r < 0) {
+ log_error("Failed to get realtime: %s", strerror(-r));
+ return r;
+ }
+
+ t = (time_t) (realtime / USEC_PER_SEC);
+ if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_r(&t, &tm)) <= 0) {
+ log_error("Failed to format time.");
+ return -EINVAL;
+ }
+
+ fputs(buf, stdout);
+ n += strlen(buf);
+
+ if (sd_journal_get_data(j, "_HOSTNAME", &data, &length) >= 0 &&
+ (arg_show_all || (!contains_unprintable(data, length) &&
+ length < PRINT_THRESHOLD))) {
+ printf(" %.*s", (int) length - 10, ((const char*) data) + 10);
+ n += length - 10 + 1;
+ }
+
+ if (sd_journal_get_data(j, "MESSAGE", &data, &length) >= 0) {
+ if (arg_show_all)
+ printf(" %.*s", (int) length - 8, ((const char*) data) + 8);
+ else if (contains_unprintable(data, length))
+ fputs(" [blob data]", stdout);
+ else if (length - 8 + n < columns())
+ printf(" %.*s", (int) length - 8, ((const char*) data) + 8);
+ else if (n < columns()) {
+ char *e;
+
+ e = ellipsize_mem((const char *) data + 8, length - 8, columns() - n - 2, 90);
+
+ if (!e)
+ printf(" %.*s", (int) length - 8, ((const char*) data) + 8);
+ else
+ printf(" %s", e);
+
+ free(e);
+ }
+ }
+
+ fputc('\n', stdout);
+
+ return 0;
+}
+
+static int output_verbose(sd_journal *j, unsigned line) {
+ const void *data;
+ size_t length;
+ char *cursor;
+ uint64_t realtime;
+ char ts[FORMAT_TIMESTAMP_MAX];
+ int r;
+
+ assert(j);
+
+ r = sd_journal_get_realtime_usec(j, &realtime);
+ if (r < 0) {
+ log_error("Failed to get realtime timestamp: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_journal_get_cursor(j, &cursor);
+ if (r < 0) {
+ log_error("Failed to get cursor: %s", strerror(-r));
+ return r;
+ }
+
+ printf("%s [%s]\n",
+ format_timestamp(ts, sizeof(ts), realtime),
+ cursor);
+
+ free(cursor);
+
+ SD_JOURNAL_FOREACH_DATA(j, data, length) {
+ if (!arg_show_all && (length > PRINT_THRESHOLD ||
+ contains_unprintable(data, length))) {
+ const char *c;
+
+ c = memchr(data, '=', length);
+ if (!c) {
+ log_error("Invalid field.");
+ return -EINVAL;
+ }
+
+ printf("\t%.*s=[blob data]\n",
+ (int) (c - (const char*) data),
+ (const char*) data);
+ } else
+ printf("\t%.*s\n", (int) length, (const char*) data);
+ }
+
+ return 0;
+}
+
+static int output_export(sd_journal *j, unsigned line) {
+ sd_id128_t boot_id;
+ char sid[33];
+ int r;
+ usec_t realtime, monotonic;
+ char *cursor;
+ const void *data;
+ size_t length;
+
+ assert(j);
+
+ r = sd_journal_get_realtime_usec(j, &realtime);
+ if (r < 0) {
+ log_error("Failed to get realtime timestamp: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
+ if (r < 0) {
+ log_error("Failed to get monotonic timestamp: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_journal_get_cursor(j, &cursor);
+ if (r < 0) {
+ log_error("Failed to get cursor: %s", strerror(-r));
+ return r;
+ }
+
+ printf(".cursor=%s\n"
+ ".realtime=%llu\n"
+ ".monotonic=%llu\n"
+ ".boot_id=%s\n",
+ cursor,
+ (unsigned long long) realtime,
+ (unsigned long long) monotonic,
+ sd_id128_to_string(boot_id, sid));
+
+ free(cursor);
+
+ SD_JOURNAL_FOREACH_DATA(j, data, length) {
+
+ if (contains_unprintable(data, length)) {
+ const char *c;
+ uint64_t le64;
+
+ c = memchr(data, '=', length);
+ if (!c) {
+ log_error("Invalid field.");
+ return -EINVAL;
+ }
+
+ fwrite(data, c - (const char*) data, 1, stdout);
+ fputc('\n', stdout);
+ le64 = htole64(length - (c - (const char*) data) - 1);
+ fwrite(&le64, sizeof(le64), 1, stdout);
+ fwrite(c + 1, length - (c - (const char*) data) - 1, 1, stdout);
+ } else
+ fwrite(data, length, 1, stdout);
+
+ fputc('\n', stdout);
+ }
+
+ fputc('\n', stdout);
+
+ return 0;
+}
+
+static void json_escape(const char* p, size_t l) {
+
+ if (contains_unprintable(p, l)) {
+ bool not_first = false;
+
+ fputs("[ ", stdout);
+
+ while (l > 0) {
+ if (not_first)
+ printf(", %u", (uint8_t) *p);
+ else {
+ not_first = true;
+ printf("%u", (uint8_t) *p);
+ }
+
+ p++;
+ l--;
+ }
+
+ fputs(" ]", stdout);
+ } else {
+ fputc('\"', stdout);
+
+ while (l > 0) {
+ if (*p == '"' || *p == '\\') {
+ fputc('\\', stdout);
+ fputc(*p, stdout);
+ } else
+ fputc(*p, stdout);
+
+ p++;
+ l--;
+ }
+
+ fputc('\"', stdout);
+ }
+}
+
+static int output_json(sd_journal *j, unsigned line) {
+ uint64_t realtime, monotonic;
+ char *cursor;
+ const void *data;
+ size_t length;
+ sd_id128_t boot_id;
+ char sid[33];
+ int r;
+
+ assert(j);
+
+ r = sd_journal_get_realtime_usec(j, &realtime);
+ if (r < 0) {
+ log_error("Failed to get realtime timestamp: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
+ if (r < 0) {
+ log_error("Failed to get monotonic timestamp: %s", strerror(-r));
+ return r;
+ }
+
+ r = sd_journal_get_cursor(j, &cursor);
+ if (r < 0) {
+ log_error("Failed to get cursor: %s", strerror(-r));
+ return r;
+ }
+
+ if (line == 1)
+ fputc('\n', stdout);
+ else
+ fputs(",\n", stdout);
+
+ printf("{\n"
+ "\t\".cursor\" : \"%s\",\n"
+ "\t\".realtime\" : %llu,\n"
+ "\t\".monotonic\" : %llu,\n"
+ "\t\".boot_id\" : \"%s\"",
+ cursor,
+ (unsigned long long) realtime,
+ (unsigned long long) monotonic,
+ sd_id128_to_string(boot_id, sid));
+
+ free(cursor);
+
+ SD_JOURNAL_FOREACH_DATA(j, data, length) {
+ const char *c;
+
+ c = memchr(data, '=', length);
+ if (!c) {
+ log_error("Invalid field.");
+ return -EINVAL;
+ }
+
+ fputs(",\n\t", stdout);
+ json_escape(data, c - (const char*) data);
+ fputs(" : ", stdout);
+ json_escape(c + 1, length - (c - (const char*) data) - 1);
+ }
+
+ fputs("\n}", stdout);
+ fflush(stdout);
+
+ return 0;
+}
+
+static int (*output_funcs[_OUTPUT_MAX])(sd_journal*j, unsigned line) = {
+ [OUTPUT_SHORT] = output_short,
+ [OUTPUT_VERBOSE] = output_verbose,
+ [OUTPUT_EXPORT] = output_export,
+ [OUTPUT_JSON] = output_json
+};
+
+static int help(void) {
+
+ printf("%s [OPTIONS...] {COMMAND} ...\n\n"
+ "Send control commands to or query the login manager.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " -a --all Show all properties, including long and unprintable\n"
+ " -f --follow Follow journal\n"
+ " -o --output=STRING Change output mode (short, verbose, export, json)\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_PAGER
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version" , no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "follow", no_argument, NULL, 'f' },
+ { "output", required_argument, NULL, 'o' },
+ { "all", no_argument, NULL, 'a' },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "hfo:a", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ puts(PACKAGE_STRING);
+ puts(DISTRIBUTION);
+ puts(SYSTEMD_FEATURES);
+ return 0;
+
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
+ case 'f':
+ arg_follow = true;
+ break;
+
+ case 'o':
+ if (streq(optarg, "short"))
+ arg_output = OUTPUT_SHORT;
+ else if (streq(optarg, "verbose"))
+ arg_output = OUTPUT_VERBOSE;
+ else if (streq(optarg, "export"))
+ arg_output = OUTPUT_EXPORT;
+ else if (streq(optarg, "json"))
+ arg_output = OUTPUT_JSON;
+ else {
+ log_error("Unknown output '%s'.", optarg);
+ return -EINVAL;
+ }
+ break;
+
+ case 'a':
+ arg_show_all = true;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[]) {
+ int r, i, fd;
+ sd_journal *j = NULL;
+ unsigned line = 0;
+
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ goto finish;
+
+ r = sd_journal_open(&j, 0);
+ if (r < 0) {
+ log_error("Failed to open journal: %s", strerror(-r));
+ goto finish;
+ }
+
+ for (i = optind; i < argc; i++) {
+ r = sd_journal_add_match(j, argv[i], strlen(argv[i]));
+ if (r < 0) {
+ log_error("Failed to add match: %s", strerror(-r));
+ goto finish;
+ }
+ }
+
+ fd = sd_journal_get_fd(j);
+ if (fd < 0) {
+ log_error("Failed to get wakeup fd: %s", strerror(-fd));
+ goto finish;
+ }
+
+ r = sd_journal_seek_head(j);
+ if (r < 0) {
+ log_error("Failed to seek to head: %s", strerror(-r));
+ goto finish;
+ }
+
+ if (!arg_no_pager && !arg_follow) {
+ columns();
+ pager_open();
+ }
+
+ if (arg_output == OUTPUT_JSON) {
+ fputc('[', stdout);
+ fflush(stdout);
+ }
+
+ for (;;) {
+ struct pollfd pollfd;
+
+ for (;;) {
+ r = sd_journal_next(j);
+
+ if (r < 0) {
+ log_error("Failed to iterate through journal: %s", strerror(-r));
+ goto finish;
+ }
+
+ if (r == 0)
+ break;
+
+ line ++;
+
+ r = output_funcs[arg_output](j, line);
+ if (r < 0)
+ goto finish;
+ }
+
+ if (!arg_follow)
+ break;
+
+ zero(pollfd);
+ pollfd.fd = fd;
+ pollfd.events = POLLIN;
+
+ if (poll(&pollfd, 1, -1) < 0) {
+ if (errno == EINTR)
+ break;
+
+ log_error("poll(): %m");
+ r = -errno;
+ goto finish;
+ }
+
+ r = sd_journal_process(j);
+ if (r < 0) {
+ log_error("Failed to process: %s", strerror(-r));
+ goto finish;
+ }
+ }
+
+ if (arg_output == OUTPUT_JSON)
+ fputs("\n]\n", stdout);
+
+finish:
+ if (j)
+ sd_journal_close(j);
+
+ pager_close();
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-24 19:30:39 +0000