691 lines
21 KiB
C
691 lines
21 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <time.h>
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#include <assert.h>
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#include <errno.h>
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#include <sys/poll.h>
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#include <string.h>
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#include "logs-show.h"
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#include "log.h"
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#include "util.h"
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#include "utf8.h"
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#define PRINT_THRESHOLD 128
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static int parse_field(const void *data, size_t length, const char *field, char **target, size_t *target_size) {
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size_t fl, nl;
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void *buf;
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assert(data);
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assert(field);
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assert(target);
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assert(target_size);
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fl = strlen(field);
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if (length < fl)
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return 0;
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if (memcmp(data, field, fl))
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return 0;
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nl = length - fl;
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buf = malloc(nl+1);
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memcpy(buf, (const char*) data + fl, nl);
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((char*)buf)[nl] = 0;
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if (!buf)
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return log_oom();
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free(*target);
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*target = buf;
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*target_size = nl;
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return 1;
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}
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static bool shall_print(bool show_all, char *p, size_t l) {
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if (show_all)
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return true;
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if (l > PRINT_THRESHOLD)
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return false;
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if (!utf8_is_printable_n(p, l))
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return false;
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return true;
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}
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static int output_short(sd_journal *j, unsigned line, unsigned n_columns,
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OutputFlags flags) {
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int r;
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const void *data;
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size_t length;
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size_t n = 0;
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char *hostname = NULL, *identifier = NULL, *comm = NULL, *pid = NULL, *fake_pid = NULL, *message = NULL, *realtime = NULL, *monotonic = NULL;
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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;
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assert(j);
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SD_JOURNAL_FOREACH_DATA(j, data, length) {
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r = parse_field(data, length, "_HOSTNAME=", &hostname, &hostname_len);
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if (r < 0)
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goto finish;
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else if (r > 0)
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continue;
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r = parse_field(data, length, "SYSLOG_IDENTIFIER=", &identifier, &identifier_len);
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if (r < 0)
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goto finish;
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else if (r > 0)
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continue;
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r = parse_field(data, length, "_COMM=", &comm, &comm_len);
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if (r < 0)
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goto finish;
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else if (r > 0)
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continue;
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r = parse_field(data, length, "_PID=", &pid, &pid_len);
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if (r < 0)
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goto finish;
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else if (r > 0)
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continue;
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r = parse_field(data, length, "SYSLOG_PID=", &fake_pid, &fake_pid_len);
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if (r < 0)
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goto finish;
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else if (r > 0)
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continue;
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r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=", &realtime, &realtime_len);
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if (r < 0)
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goto finish;
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else if (r > 0)
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continue;
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r = parse_field(data, length, "_SOURCE_MONOTONIC_TIMESTAMP=", &monotonic, &monotonic_len);
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if (r < 0)
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goto finish;
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else if (r > 0)
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continue;
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r = parse_field(data, length, "MESSAGE=", &message, &message_len);
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if (r < 0)
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goto finish;
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}
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if (!message) {
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r = 0;
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goto finish;
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}
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if (flags & OUTPUT_MONOTONIC_MODE) {
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uint64_t t;
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sd_id128_t boot_id;
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r = -ENOENT;
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if (monotonic)
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r = safe_atou64(monotonic, &t);
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if (r < 0)
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r = sd_journal_get_monotonic_usec(j, &t, &boot_id);
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if (r < 0) {
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log_error("Failed to get monotonic: %s", strerror(-r));
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goto finish;
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}
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printf("[%5llu.%06llu]",
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(unsigned long long) (t / USEC_PER_SEC),
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(unsigned long long) (t % USEC_PER_SEC));
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n += 1 + 5 + 1 + 6 + 1;
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} else {
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char buf[64];
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uint64_t x;
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time_t t;
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struct tm tm;
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r = -ENOENT;
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if (realtime)
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r = safe_atou64(realtime, &x);
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if (r < 0)
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r = sd_journal_get_realtime_usec(j, &x);
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if (r < 0) {
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log_error("Failed to get realtime: %s", strerror(-r));
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goto finish;
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}
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t = (time_t) (x / USEC_PER_SEC);
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if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_r(&t, &tm)) <= 0) {
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log_error("Failed to format time.");
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goto finish;
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}
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fputs(buf, stdout);
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n += strlen(buf);
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}
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if (hostname && shall_print(flags & OUTPUT_SHOW_ALL,
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hostname, hostname_len)) {
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printf(" %.*s", (int) hostname_len, hostname);
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n += hostname_len + 1;
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}
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if (identifier && shall_print(flags & OUTPUT_SHOW_ALL,
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identifier, identifier_len)) {
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printf(" %.*s", (int) identifier_len, identifier);
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n += identifier_len + 1;
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} else if (comm && shall_print(flags & OUTPUT_SHOW_ALL,
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comm, comm_len)) {
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printf(" %.*s", (int) comm_len, comm);
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n += comm_len + 1;
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} else
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putchar(' ');
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if (pid && shall_print(flags & OUTPUT_SHOW_ALL, pid, pid_len)) {
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printf("[%.*s]", (int) pid_len, pid);
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n += pid_len + 2;
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} else if (fake_pid && shall_print(flags & OUTPUT_SHOW_ALL,
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fake_pid, fake_pid_len)) {
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printf("[%.*s]", (int) fake_pid_len, fake_pid);
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n += fake_pid_len + 2;
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}
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if (flags & OUTPUT_SHOW_ALL)
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printf(": %.*s\n", (int) message_len, message);
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else if (!utf8_is_printable_n(message, message_len)) {
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char bytes[FORMAT_BYTES_MAX];
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printf(": [%s blob data]\n", format_bytes(bytes, sizeof(bytes), message_len));
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} else if ((flags & OUTPUT_FULL_WIDTH) ||
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(message_len + n < n_columns))
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printf(": %.*s\n", (int) message_len, message);
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else if (n < n_columns && n_columns - n - 2 >= 3) {
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char *e;
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e = ellipsize_mem(message, message_len, n_columns - n - 2, 90);
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if (!e)
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printf(": %.*s\n", (int) message_len, message);
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else
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printf(": %s\n", e);
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free(e);
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} else
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fputs("\n", stdout);
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r = 0;
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finish:
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free(hostname);
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free(identifier);
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free(comm);
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free(pid);
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free(fake_pid);
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free(message);
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free(monotonic);
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free(realtime);
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return r;
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}
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static int output_short_realtime(sd_journal *j, unsigned line,
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unsigned n_columns, OutputFlags flags) {
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return output_short(j, line, n_columns, flags & ~OUTPUT_MONOTONIC_MODE);
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}
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static int output_short_monotonic(sd_journal *j, unsigned line,
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unsigned n_columns, OutputFlags flags) {
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return output_short(j, line, n_columns, flags | OUTPUT_MONOTONIC_MODE);
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}
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static int output_verbose(sd_journal *j, unsigned line,
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unsigned n_columns, OutputFlags flags) {
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const void *data;
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size_t length;
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char *cursor;
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uint64_t realtime;
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char ts[FORMAT_TIMESTAMP_MAX];
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int r;
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assert(j);
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r = sd_journal_get_realtime_usec(j, &realtime);
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if (r < 0) {
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log_error("Failed to get realtime timestamp: %s", strerror(-r));
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return r;
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}
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r = sd_journal_get_cursor(j, &cursor);
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if (r < 0) {
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log_error("Failed to get cursor: %s", strerror(-r));
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return r;
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}
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printf("%s [%s]\n",
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format_timestamp(ts, sizeof(ts), realtime),
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cursor);
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free(cursor);
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SD_JOURNAL_FOREACH_DATA(j, data, length) {
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if (!(flags & OUTPUT_SHOW_ALL) && (length > PRINT_THRESHOLD ||
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!utf8_is_printable_n(data, length))) {
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const char *c;
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char bytes[FORMAT_BYTES_MAX];
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c = memchr(data, '=', length);
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if (!c) {
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log_error("Invalid field.");
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return -EINVAL;
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}
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printf("\t%.*s=[%s blob data]\n",
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(int) (c - (const char*) data),
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(const char*) data,
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format_bytes(bytes, sizeof(bytes), length - (c - (const char *) data) - 1));
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} else
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printf("\t%.*s\n", (int) length, (const char*) data);
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}
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return 0;
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}
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static int output_export(sd_journal *j, unsigned line,
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unsigned n_columns, OutputFlags flags) {
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sd_id128_t boot_id;
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char sid[33];
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int r;
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usec_t realtime, monotonic;
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char *cursor;
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const void *data;
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size_t length;
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assert(j);
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r = sd_journal_get_realtime_usec(j, &realtime);
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if (r < 0) {
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log_error("Failed to get realtime timestamp: %s", strerror(-r));
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return r;
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}
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r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
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if (r < 0) {
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log_error("Failed to get monotonic timestamp: %s", strerror(-r));
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return r;
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}
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r = sd_journal_get_cursor(j, &cursor);
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if (r < 0) {
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log_error("Failed to get cursor: %s", strerror(-r));
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return r;
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}
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printf("__CURSOR=%s\n"
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"__REALTIME_TIMESTAMP=%llu\n"
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"__MONOTONIC_TIMESTAMP=%llu\n"
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"_BOOT_ID=%s\n",
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cursor,
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(unsigned long long) realtime,
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(unsigned long long) monotonic,
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sd_id128_to_string(boot_id, sid));
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free(cursor);
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SD_JOURNAL_FOREACH_DATA(j, data, length) {
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/* We already printed the boot id, from the data in
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* the header, hence let's suppress it here */
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if (length >= 9 &&
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memcmp(data, "_BOOT_ID=", 9) == 0)
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continue;
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if (!utf8_is_printable_n(data, length)) {
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const char *c;
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uint64_t le64;
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c = memchr(data, '=', length);
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if (!c) {
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log_error("Invalid field.");
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return -EINVAL;
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}
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fwrite(data, c - (const char*) data, 1, stdout);
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fputc('\n', stdout);
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le64 = htole64(length - (c - (const char*) data) - 1);
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fwrite(&le64, sizeof(le64), 1, stdout);
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fwrite(c + 1, length - (c - (const char*) data) - 1, 1, stdout);
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} else
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fwrite(data, length, 1, stdout);
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fputc('\n', stdout);
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}
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fputc('\n', stdout);
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return 0;
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}
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static void json_escape(const char* p, size_t l) {
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if (!utf8_is_printable_n(p, l)) {
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bool not_first = false;
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fputs("[ ", stdout);
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while (l > 0) {
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if (not_first)
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printf(", %u", (uint8_t) *p);
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else {
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not_first = true;
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printf("%u", (uint8_t) *p);
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}
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p++;
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l--;
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}
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fputs(" ]", stdout);
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} else {
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fputc('\"', stdout);
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while (l > 0) {
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if (*p == '"' || *p == '\\') {
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fputc('\\', stdout);
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fputc(*p, stdout);
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} else
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fputc(*p, stdout);
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p++;
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l--;
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}
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fputc('\"', stdout);
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}
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}
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static int output_json(sd_journal *j, unsigned line,
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unsigned n_columns, OutputFlags flags) {
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uint64_t realtime, monotonic;
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char *cursor;
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const void *data;
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size_t length;
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sd_id128_t boot_id;
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char sid[33];
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int r;
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assert(j);
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r = sd_journal_get_realtime_usec(j, &realtime);
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if (r < 0) {
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log_error("Failed to get realtime timestamp: %s", strerror(-r));
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return r;
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}
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r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
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if (r < 0) {
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log_error("Failed to get monotonic timestamp: %s", strerror(-r));
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return r;
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}
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r = sd_journal_get_cursor(j, &cursor);
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if (r < 0) {
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log_error("Failed to get cursor: %s", strerror(-r));
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return r;
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}
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if (line == 1)
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fputc('\n', stdout);
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else
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fputs(",\n", stdout);
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printf("{\n"
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"\t\"__CURSOR\" : \"%s\",\n"
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"\t\"__REALTIME_TIMESTAMP\" : \"%llu\",\n"
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"\t\"__MONOTONIC_TIMESTAMP\" : \"%llu\",\n"
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"\t\"_BOOT_ID\" : \"%s\"",
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cursor,
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(unsigned long long) realtime,
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(unsigned long long) monotonic,
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sd_id128_to_string(boot_id, sid));
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free(cursor);
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SD_JOURNAL_FOREACH_DATA(j, data, length) {
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const char *c;
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/* We already printed the boot id, from the data in
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* the header, hence let's suppress it here */
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if (length >= 9 &&
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memcmp(data, "_BOOT_ID=", 9) == 0)
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continue;
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c = memchr(data, '=', length);
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if (!c) {
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log_error("Invalid field.");
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return -EINVAL;
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}
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fputs(",\n\t", stdout);
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json_escape(data, c - (const char*) data);
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fputs(" : ", stdout);
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json_escape(c + 1, length - (c - (const char*) data) - 1);
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}
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fputs("\n}", stdout);
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fflush(stdout);
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return 0;
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}
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static int output_cat(sd_journal *j, unsigned line,
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unsigned n_columns, OutputFlags flags) {
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const void *data;
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size_t l;
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int r;
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assert(j);
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r = sd_journal_get_data(j, "MESSAGE", &data, &l);
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if (r < 0) {
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log_error("Failed to get data: %s", strerror(-r));
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return r;
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}
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assert(l >= 8);
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fwrite((const char*) data + 8, 1, l - 8, stdout);
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putchar('\n');
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return 0;
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}
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static int (*output_funcs[_OUTPUT_MODE_MAX])(sd_journal*j, unsigned line,
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unsigned n_columns, OutputFlags flags) = {
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[OUTPUT_SHORT] = output_short_realtime,
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[OUTPUT_SHORT_MONOTONIC] = output_short_monotonic,
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[OUTPUT_VERBOSE] = output_verbose,
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[OUTPUT_EXPORT] = output_export,
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[OUTPUT_JSON] = output_json,
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[OUTPUT_CAT] = output_cat
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};
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int output_journal(sd_journal *j, OutputMode mode, unsigned line,
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unsigned n_columns, OutputFlags flags) {
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assert(mode >= 0);
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assert(mode < _OUTPUT_MODE_MAX);
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if (n_columns <= 0)
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n_columns = columns();
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return output_funcs[mode](j, line, n_columns, flags);
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}
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|
int show_journal_by_unit(
|
|
const char *unit,
|
|
OutputMode mode,
|
|
unsigned n_columns,
|
|
usec_t not_before,
|
|
unsigned how_many,
|
|
OutputFlags flags) {
|
|
|
|
char *m = NULL;
|
|
sd_journal *j = NULL;
|
|
int r;
|
|
unsigned line = 0;
|
|
bool need_seek = false;
|
|
int warn_cutoff = flags & OUTPUT_WARN_CUTOFF;
|
|
|
|
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;
|
|
|
|
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, flags);
|
|
if (r < 0)
|
|
goto finish;
|
|
}
|
|
|
|
if (warn_cutoff && line < how_many && not_before > 0) {
|
|
sd_id128_t boot_id;
|
|
usec_t cutoff;
|
|
|
|
/* Check whether the cutoff line is too early */
|
|
|
|
r = sd_id128_get_boot(&boot_id);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
r = sd_journal_get_cutoff_monotonic_usec(j, boot_id, &cutoff, NULL);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (r > 0 && not_before < cutoff)
|
|
printf("Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.\n");
|
|
|
|
warn_cutoff = false;
|
|
}
|
|
|
|
if (!(flags & OUTPUT_FOLLOW))
|
|
break;
|
|
|
|
r = sd_journal_wait(j, (usec_t) -1);
|
|
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);
|