+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2012 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <time.h>
-#include <assert.h>
-#include <errno.h>
-#include <sys/poll.h>
-#include <string.h>
-
-#include "logs-show.h"
-#include "log.h"
-#include "util.h"
-
-#define PRINT_THRESHOLD 128
-
-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 parse_field(const void *data, size_t length, const char *field, char **target, size_t *target_size) {
- size_t fl, nl;
- void *buf;
-
- assert(data);
- assert(field);
- assert(target);
- assert(target_size);
-
- fl = strlen(field);
- if (length < fl)
- return 0;
-
- if (memcmp(data, field, fl))
- return 0;
-
- nl = length - fl;
- buf = malloc(nl+1);
- memcpy(buf, (const char*) data + fl, nl);
- ((char*)buf)[nl] = 0;
- if (!buf) {
- log_error("Out of memory");
- return -ENOMEM;
- }
-
- free(*target);
- *target = buf;
- *target_size = nl;
-
- return 1;
-}
-
-static bool shall_print(bool show_all, char *p, size_t l) {
- if (show_all)
- return true;
-
- if (l > PRINT_THRESHOLD)
- return false;
-
- if (contains_unprintable(p, l))
- return false;
-
- return true;
-}
-
-static int output_short(sd_journal *j, unsigned line, unsigned n_columns, bool show_all, bool monotonic_mode) {
- int r;
- const void *data;
- size_t length;
- size_t n = 0;
- char *hostname = NULL, *identifier = NULL, *comm = NULL, *pid = NULL, *fake_pid = NULL, *message = NULL, *realtime = NULL, *monotonic = NULL;
- size_t hostname_len = 0, identifier_len = 0, comm_len = 0, pid_len = 0, fake_pid_len = 0, message_len = 0, realtime_len = 0, monotonic_len = 0;
-
- assert(j);
-
- SD_JOURNAL_FOREACH_DATA(j, data, length) {
-
- r = parse_field(data, length, "_HOSTNAME=", &hostname, &hostname_len);
- if (r < 0)
- goto finish;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "SYSLOG_IDENTIFIER=", &identifier, &identifier_len);
- if (r < 0)
- goto finish;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_COMM=", &comm, &comm_len);
- if (r < 0)
- goto finish;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_PID=", &pid, &pid_len);
- if (r < 0)
- goto finish;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "SYSLOG_PID=", &fake_pid, &fake_pid_len);
- if (r < 0)
- goto finish;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=", &realtime, &realtime_len);
- if (r < 0)
- goto finish;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_SOURCE_MONOTONIC_TIMESTAMP=", &monotonic, &monotonic_len);
- if (r < 0)
- goto finish;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "MESSAGE=", &message, &message_len);
- if (r < 0)
- goto finish;
- }
-
- if (!message) {
- r = 0;
- goto finish;
- }
-
- if (monotonic_mode) {
- uint64_t t;
- sd_id128_t boot_id;
-
- r = -ENOENT;
-
- if (monotonic)
- r = safe_atou64(monotonic, &t);
-
- if (r < 0)
- r = sd_journal_get_monotonic_usec(j, &t, &boot_id);
-
- if (r < 0) {
- log_error("Failed to get monotonic: %s", strerror(-r));
- goto finish;
- }
-
- printf("[%5llu.%06llu]",
- (unsigned long long) (t / USEC_PER_SEC),
- (unsigned long long) (t % USEC_PER_SEC));
-
- n += 1 + 5 + 1 + 6 + 1;
-
- } else {
- char buf[64];
- uint64_t x;
- time_t t;
- struct tm tm;
-
- r = -ENOENT;
-
- if (realtime)
- r = safe_atou64(realtime, &x);
-
- if (r < 0)
- r = sd_journal_get_realtime_usec(j, &x);
-
- if (r < 0) {
- log_error("Failed to get realtime: %s", strerror(-r));
- goto finish;
- }
-
- t = (time_t) (x / USEC_PER_SEC);
- if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_r(&t, &tm)) <= 0) {
- log_error("Failed to format time.");
- goto finish;
- }
-
- fputs(buf, stdout);
- n += strlen(buf);
- }
-
- if (hostname && shall_print(show_all, hostname, hostname_len)) {
- printf(" %.*s", (int) hostname_len, hostname);
- n += hostname_len + 1;
- }
-
- if (identifier && shall_print(show_all, identifier, identifier_len)) {
- printf(" %.*s", (int) identifier_len, identifier);
- n += identifier_len + 1;
- } else if (comm && shall_print(show_all, comm, comm_len)) {
- printf(" %.*s", (int) comm_len, comm);
- n += comm_len + 1;
- } else
- putchar(' ');
-
- if (pid && shall_print(show_all, pid, pid_len)) {
- printf("[%.*s]", (int) pid_len, pid);
- n += pid_len + 2;
- } else if (fake_pid && shall_print(show_all, fake_pid, fake_pid_len)) {
- printf("[%.*s]", (int) fake_pid_len, fake_pid);
- n += fake_pid_len + 2;
- }
-
- if (show_all)
- printf(": %.*s\n", (int) message_len, message);
- else if (contains_unprintable(message, message_len)) {
- char bytes[FORMAT_BYTES_MAX];
- printf(": [%s blob data]\n", format_bytes(bytes, sizeof(bytes), message_len));
- } else if (message_len + n < n_columns)
- printf(": %.*s\n", (int) message_len, message);
- else if (n < n_columns) {
- char *e;
-
- e = ellipsize_mem(message, message_len, n_columns - n - 2, 90);
-
- if (!e)
- printf(": %.*s\n", (int) message_len, message);
- else
- printf(": %s\n", e);
-
- free(e);
- } else
- fputs("\n", stdout);
-
- r = 0;
-
-finish:
- free(hostname);
- free(identifier);
- free(comm);
- free(pid);
- free(fake_pid);
- free(message);
- free(monotonic);
- free(realtime);
-
- return r;
-}
-
-static int output_short_realtime(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
- return output_short(j, line, n_columns, show_all, false);
-}
-
-static int output_short_monotonic(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
- return output_short(j, line, n_columns, show_all, true);
-}
-
-static int output_verbose(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
- 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 (!show_all && (length > PRINT_THRESHOLD ||
- contains_unprintable(data, length))) {
- const char *c;
- char bytes[FORMAT_BYTES_MAX];
-
- c = memchr(data, '=', length);
- if (!c) {
- log_error("Invalid field.");
- return -EINVAL;
- }
-
- printf("\t%.*s=[%s blob data]\n",
- (int) (c - (const char*) data),
- (const char*) data,
- format_bytes(bytes, sizeof(bytes), length - (c - (const char *) data) - 1));
- } else
- printf("\t%.*s\n", (int) length, (const char*) data);
- }
-
- return 0;
-}
-
-static int output_export(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
- 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_TIMESTAMP=%llu\n"
- "__MONOTONIC_TIMESTAMP=%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) {
-
- /* We already printed the boot id, from the data in
- * the header, hence let's suppress it here */
- if (length >= 9 &&
- memcmp(data, "_BOOT_ID=", 9) == 0)
- continue;
-
- 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, unsigned n_columns, bool show_all) {
- 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_TIMESTAMP\" : \"%llu\",\n"
- "\t\"__MONOTONIC_TIMESTAMP\" : \"%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;
-
- /* We already printed the boot id, from the data in
- * the header, hence let's suppress it here */
- if (length >= 9 &&
- memcmp(data, "_BOOT_ID=", 9) == 0)
- continue;
-
- 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_cat(sd_journal *j, unsigned line, unsigned n_columns, bool show_all) {
- const void *data;
- size_t l;
- int r;
-
- assert(j);
-
- r = sd_journal_get_data(j, "MESSAGE", &data, &l);
- if (r < 0) {
- log_error("Failed to get data: %s", strerror(-r));
- return r;
- }
-
- assert(l >= 8);
-
- fwrite((const char*) data + 8, 1, l - 8, stdout);
- putchar('\n');
-
- return 0;
-}
-
-static int (*output_funcs[_OUTPUT_MODE_MAX])(sd_journal*j, unsigned line, unsigned n_columns, bool show_all) = {
- [OUTPUT_SHORT] = output_short_realtime,
- [OUTPUT_SHORT_MONOTONIC] = output_short_monotonic,
- [OUTPUT_VERBOSE] = output_verbose,
- [OUTPUT_EXPORT] = output_export,
- [OUTPUT_JSON] = output_json,
- [OUTPUT_CAT] = output_cat
-};
-
-int output_journal(sd_journal *j, OutputMode mode, unsigned line, unsigned n_columns, bool show_all) {
- assert(mode >= 0);
- assert(mode < _OUTPUT_MODE_MAX);
-
- if (n_columns <= 0)
- n_columns = columns();
-
- return output_funcs[mode](j, line, n_columns, show_all);
-}
-
-int show_journal_by_unit(
- const char *unit,
- OutputMode mode,
- unsigned n_columns,
- usec_t not_before,
- unsigned how_many,
- bool show_all,
- bool follow) {
-
- char *m = NULL;
- sd_journal *j;
- int r;
- int fd;
- unsigned line = 0;
- bool need_seek = false;
-
- assert(mode >= 0);
- assert(mode < _OUTPUT_MODE_MAX);
- assert(unit);
-
- if (!endswith(unit, ".service") &&
- !endswith(unit, ".socket") &&
- !endswith(unit, ".mount") &&
- !endswith(unit, ".swap"))
- return 0;
-
- if (how_many <= 0)
- return 0;
-
- if (asprintf(&m, "_SYSTEMD_UNIT=%s", unit) < 0) {
- r = -ENOMEM;
- goto finish;
- }
-
- r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM_ONLY);
- if (r < 0)
- goto finish;
-
- fd = sd_journal_get_fd(j);
- if (fd < 0)
- goto finish;
-
- r = sd_journal_add_match(j, m, strlen(m));
- if (r < 0)
- goto finish;
-
- r = sd_journal_seek_tail(j);
- if (r < 0)
- goto finish;
-
- r = sd_journal_previous_skip(j, how_many);
- if (r < 0)
- goto finish;
-
- if (mode == OUTPUT_JSON) {
- fputc('[', stdout);
- fflush(stdout);
- }
-
- for (;;) {
- for (;;) {
- usec_t usec;
-
- if (need_seek) {
- r = sd_journal_next(j);
- if (r < 0)
- goto finish;
- }
-
- if (r == 0)
- break;
-
- need_seek = true;
-
- if (not_before > 0) {
- r = sd_journal_get_monotonic_usec(j, &usec, NULL);
-
- /* -ESTALE is returned if the
- timestamp is not from this boot */
- if (r == -ESTALE)
- continue;
- else if (r < 0)
- goto finish;
-
- if (usec < not_before)
- continue;
- }
-
- line ++;
-
- r = output_journal(j, mode, line, n_columns, show_all);
- if (r < 0)
- goto finish;
- }
-
- if (!follow)
- break;
-
- r = fd_wait_for_event(fd, POLLIN, (usec_t) -1);
- if (r < 0)
- goto finish;
-
- r = sd_journal_process(j);
- if (r < 0)
- goto finish;
-
- }
-
- if (mode == OUTPUT_JSON)
- fputs("\n]\n", stdout);
-
-finish:
- if (m)
- free(m);
-
- if (j)
- sd_journal_close(j);
-
- return r;
-}
-
-static const char *const output_mode_table[_OUTPUT_MODE_MAX] = {
- [OUTPUT_SHORT] = "short",
- [OUTPUT_SHORT_MONOTONIC] = "short-monotonic",
- [OUTPUT_VERBOSE] = "verbose",
- [OUTPUT_EXPORT] = "export",
- [OUTPUT_JSON] = "json",
- [OUTPUT_CAT] = "cat"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(output_mode, OutputMode);
~ianmdlvl / elogind.git / blobdiff