+++ /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 <errno.h>
-#include <sys/socket.h>
-#include <string.h>
-#include <fcntl.h>
-
-#include "logs-show.h"
-#include "log.h"
-#include "util.h"
-#include "utf8.h"
-#include "hashmap.h"
-#include "journal-internal.h"
-#include "formats-util.h"
-#include "process-util.h"
-#include "terminal-util.h"
-
-/* up to three lines (each up to 100 characters),
- or 300 characters, whichever is less */
-#define PRINT_LINE_THRESHOLD 3
-#define PRINT_CHAR_THRESHOLD 300
-
-#define JSON_THRESHOLD 4096
-
-static int print_catalog(FILE *f, sd_journal *j) {
- int r;
- _cleanup_free_ char *t = NULL, *z = NULL;
-
-
- r = sd_journal_get_catalog(j, &t);
- if (r < 0)
- return r;
-
- z = strreplace(strstrip(t), "\n", "\n-- ");
- if (!z)
- return log_oom();
-
- fputs("-- ", f);
- fputs(z, f);
- fputc('\n', f);
-
- return 0;
-}
-
-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);
- if (!buf)
- return log_oom();
-
- memcpy(buf, (const char*) data + fl, nl);
- ((char*)buf)[nl] = 0;
-
- free(*target);
- *target = buf;
- *target_size = nl;
-
- return 1;
-}
-
-static bool shall_print(const char *p, size_t l, OutputFlags flags) {
- assert(p);
-
- if (flags & OUTPUT_SHOW_ALL)
- return true;
-
- if (l >= PRINT_CHAR_THRESHOLD)
- return false;
-
- if (!utf8_is_printable(p, l))
- return false;
-
- return true;
-}
-
-static bool print_multiline(FILE *f, unsigned prefix, unsigned n_columns, OutputFlags flags, int priority, const char* message, size_t message_len) {
- const char *color_on = "", *color_off = "";
- const char *pos, *end;
- bool ellipsized = false;
- int line = 0;
-
- if (flags & OUTPUT_COLOR) {
- if (priority <= LOG_ERR) {
- color_on = ANSI_HIGHLIGHT_RED_ON;
- color_off = ANSI_HIGHLIGHT_OFF;
- } else if (priority <= LOG_NOTICE) {
- color_on = ANSI_HIGHLIGHT_ON;
- color_off = ANSI_HIGHLIGHT_OFF;
- }
- }
-
- /* A special case: make sure that we print a newline when
- the message is empty. */
- if (message_len == 0)
- fputs("\n", f);
-
- for (pos = message;
- pos < message + message_len;
- pos = end + 1, line++) {
- bool continuation = line > 0;
- bool tail_line;
- int len;
- for (end = pos; end < message + message_len && *end != '\n'; end++)
- ;
- len = end - pos;
- assert(len >= 0);
-
- /* We need to figure out when we are showing not-last line, *and*
- * will skip subsequent lines. In that case, we will put the dots
- * at the end of the line, instead of putting dots in the middle
- * or not at all.
- */
- tail_line =
- line + 1 == PRINT_LINE_THRESHOLD ||
- end + 1 >= message + PRINT_CHAR_THRESHOLD;
-
- if (flags & (OUTPUT_FULL_WIDTH | OUTPUT_SHOW_ALL) ||
- (prefix + len + 1 < n_columns && !tail_line)) {
- fprintf(f, "%*s%s%.*s%s\n",
- continuation * prefix, "",
- color_on, len, pos, color_off);
- continue;
- }
-
- /* Beyond this point, ellipsization will happen. */
- ellipsized = true;
-
- if (prefix < n_columns && n_columns - prefix >= 3) {
- if (n_columns - prefix > (unsigned) len + 3)
- fprintf(f, "%*s%s%.*s...%s\n",
- continuation * prefix, "",
- color_on, len, pos, color_off);
- else {
- _cleanup_free_ char *e;
-
- e = ellipsize_mem(pos, len, n_columns - prefix,
- tail_line ? 100 : 90);
- if (!e)
- fprintf(f, "%*s%s%.*s%s\n",
- continuation * prefix, "",
- color_on, len, pos, color_off);
- else
- fprintf(f, "%*s%s%s%s\n",
- continuation * prefix, "",
- color_on, e, color_off);
- }
- } else
- fputs("...\n", f);
-
- if (tail_line)
- break;
- }
-
- return ellipsized;
-}
-
-static int output_short(
- FILE *f,
- sd_journal *j,
- OutputMode mode,
- unsigned n_columns,
- OutputFlags flags) {
-
- int r;
- const void *data;
- size_t length;
- size_t n = 0;
- _cleanup_free_ char *hostname = NULL, *identifier = NULL, *comm = NULL, *pid = NULL, *fake_pid = NULL, *message = NULL, *realtime = NULL, *monotonic = NULL, *priority = 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, priority_len = 0;
- int p = LOG_INFO;
- bool ellipsized = false;
-
- assert(f);
- assert(j);
-
- /* Set the threshold to one bigger than the actual print
- * threshold, so that if the line is actually longer than what
- * we're willing to print, ellipsization will occur. This way
- * we won't output a misleading line without any indication of
- * truncation.
- */
- sd_journal_set_data_threshold(j, flags & (OUTPUT_SHOW_ALL|OUTPUT_FULL_WIDTH) ? 0 : PRINT_CHAR_THRESHOLD + 1);
-
- JOURNAL_FOREACH_DATA_RETVAL(j, data, length, r) {
-
- r = parse_field(data, length, "PRIORITY=", &priority, &priority_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_HOSTNAME=", &hostname, &hostname_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "SYSLOG_IDENTIFIER=", &identifier, &identifier_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_COMM=", &comm, &comm_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_PID=", &pid, &pid_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "SYSLOG_PID=", &fake_pid, &fake_pid_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=", &realtime, &realtime_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "_SOURCE_MONOTONIC_TIMESTAMP=", &monotonic, &monotonic_len);
- if (r < 0)
- return r;
- else if (r > 0)
- continue;
-
- r = parse_field(data, length, "MESSAGE=", &message, &message_len);
- if (r < 0)
- return r;
- }
-
- if (r < 0)
- return log_error_errno(r, "Failed to get journal fields: %m");
-
- if (!message) {
- log_debug("Skipping message without MESSAGE= field.");
- return 0;
- }
-
- if (!(flags & OUTPUT_SHOW_ALL))
- strip_tab_ansi(&message, &message_len);
-
- if (priority_len == 1 && *priority >= '0' && *priority <= '7')
- p = *priority - '0';
-
- if (mode == OUTPUT_SHORT_MONOTONIC) {
- 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)
- return log_error_errno(r, "Failed to get monotonic timestamp: %m");
-
- fprintf(f, "[%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;
- struct tm *(*gettime_r)(const time_t *, struct tm *);
-
- r = -ENOENT;
- gettime_r = (flags & OUTPUT_UTC) ? gmtime_r : localtime_r;
-
- if (realtime)
- r = safe_atou64(realtime, &x);
-
- if (r < 0)
- r = sd_journal_get_realtime_usec(j, &x);
-
- if (r < 0)
- return log_error_errno(r, "Failed to get realtime timestamp: %m");
-
- t = (time_t) (x / USEC_PER_SEC);
-
- switch(mode) {
- case OUTPUT_SHORT_ISO:
- r = strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S%z", gettime_r(&t, &tm));
- break;
- case OUTPUT_SHORT_PRECISE:
- r = strftime(buf, sizeof(buf), "%b %d %H:%M:%S", gettime_r(&t, &tm));
- if (r > 0) {
- snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
- ".%06llu", (unsigned long long) (x % USEC_PER_SEC));
- }
- break;
- default:
- r = strftime(buf, sizeof(buf), "%b %d %H:%M:%S", gettime_r(&t, &tm));
- }
-
- if (r <= 0) {
- log_error("Failed to format time.");
- return -EINVAL;
- }
-
- fputs(buf, f);
- n += strlen(buf);
- }
-
- if (hostname && shall_print(hostname, hostname_len, flags)) {
- fprintf(f, " %.*s", (int) hostname_len, hostname);
- n += hostname_len + 1;
- }
-
- if (identifier && shall_print(identifier, identifier_len, flags)) {
- fprintf(f, " %.*s", (int) identifier_len, identifier);
- n += identifier_len + 1;
- } else if (comm && shall_print(comm, comm_len, flags)) {
- fprintf(f, " %.*s", (int) comm_len, comm);
- n += comm_len + 1;
- } else
- fputs(" unknown", f);
-
- if (pid && shall_print(pid, pid_len, flags)) {
- fprintf(f, "[%.*s]", (int) pid_len, pid);
- n += pid_len + 2;
- } else if (fake_pid && shall_print(fake_pid, fake_pid_len, flags)) {
- fprintf(f, "[%.*s]", (int) fake_pid_len, fake_pid);
- n += fake_pid_len + 2;
- }
-
- if (!(flags & OUTPUT_SHOW_ALL) && !utf8_is_printable(message, message_len)) {
- char bytes[FORMAT_BYTES_MAX];
- fprintf(f, ": [%s blob data]\n", format_bytes(bytes, sizeof(bytes), message_len));
- } else {
- fputs(": ", f);
- ellipsized |=
- print_multiline(f, n + 2, n_columns, flags, p, message, message_len);
- }
-
- if (flags & OUTPUT_CATALOG)
- print_catalog(f, j);
-
- return ellipsized;
-}
-
-static int output_verbose(
- FILE *f,
- sd_journal *j,
- OutputMode mode,
- unsigned n_columns,
- OutputFlags flags) {
-
- const void *data;
- size_t length;
- _cleanup_free_ char *cursor = NULL;
- uint64_t realtime;
- char ts[FORMAT_TIMESTAMP_MAX + 7];
- int r;
-
- assert(f);
- assert(j);
-
- sd_journal_set_data_threshold(j, 0);
-
- r = sd_journal_get_data(j, "_SOURCE_REALTIME_TIMESTAMP", &data, &length);
- if (r == -ENOENT)
- log_debug("Source realtime timestamp not found");
- else if (r < 0)
- return log_full_errno(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_ERR, r, "Failed to get source realtime timestamp: %m");
- else {
- _cleanup_free_ char *value = NULL;
- size_t size;
-
- r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=", &value, &size);
- if (r < 0)
- log_debug_errno(r, "_SOURCE_REALTIME_TIMESTAMP invalid: %m");
- else {
- r = safe_atou64(value, &realtime);
- if (r < 0)
- log_debug_errno(r, "Failed to parse realtime timestamp: %m");
- }
- }
-
- if (r < 0) {
- r = sd_journal_get_realtime_usec(j, &realtime);
- if (r < 0)
- return log_full_errno(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_ERR, r, "Failed to get realtime timestamp: %m");
- }
-
- r = sd_journal_get_cursor(j, &cursor);
- if (r < 0)
- return log_error_errno(r, "Failed to get cursor: %m");
-
- fprintf(f, "%s [%s]\n",
- flags & OUTPUT_UTC ?
- format_timestamp_us_utc(ts, sizeof(ts), realtime) :
- format_timestamp_us(ts, sizeof(ts), realtime),
- cursor);
-
- JOURNAL_FOREACH_DATA_RETVAL(j, data, length, r) {
- const char *c;
- int fieldlen;
- const char *on = "", *off = "";
-
- c = memchr(data, '=', length);
- if (!c) {
- log_error("Invalid field.");
- return -EINVAL;
- }
- fieldlen = c - (const char*) data;
-
- if (flags & OUTPUT_COLOR && startswith(data, "MESSAGE=")) {
- on = ANSI_HIGHLIGHT_ON;
- off = ANSI_HIGHLIGHT_OFF;
- }
-
- if (flags & OUTPUT_SHOW_ALL ||
- (((length < PRINT_CHAR_THRESHOLD) || flags & OUTPUT_FULL_WIDTH)
- && utf8_is_printable(data, length))) {
- fprintf(f, " %s%.*s=", on, fieldlen, (const char*)data);
- print_multiline(f, 4 + fieldlen + 1, 0, OUTPUT_FULL_WIDTH, 0, c + 1, length - fieldlen - 1);
- fputs(off, f);
- } else {
- char bytes[FORMAT_BYTES_MAX];
-
- fprintf(f, " %s%.*s=[%s blob data]%s\n",
- on,
- (int) (c - (const char*) data),
- (const char*) data,
- format_bytes(bytes, sizeof(bytes), length - (c - (const char *) data) - 1),
- off);
- }
- }
-
- if (r < 0)
- return r;
-
- if (flags & OUTPUT_CATALOG)
- print_catalog(f, j);
-
- return 0;
-}
-
-static int output_export(
- FILE *f,
- sd_journal *j,
- OutputMode mode,
- unsigned n_columns,
- OutputFlags flags) {
-
- sd_id128_t boot_id;
- char sid[33];
- int r;
- usec_t realtime, monotonic;
- _cleanup_free_ char *cursor = NULL;
- const void *data;
- size_t length;
-
- assert(j);
-
- sd_journal_set_data_threshold(j, 0);
-
- r = sd_journal_get_realtime_usec(j, &realtime);
- if (r < 0)
- return log_error_errno(r, "Failed to get realtime timestamp: %m");
-
- r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
- if (r < 0)
- return log_error_errno(r, "Failed to get monotonic timestamp: %m");
-
- r = sd_journal_get_cursor(j, &cursor);
- if (r < 0)
- return log_error_errno(r, "Failed to get cursor: %m");
-
- fprintf(f,
- "__CURSOR=%s\n"
- "__REALTIME_TIMESTAMP="USEC_FMT"\n"
- "__MONOTONIC_TIMESTAMP="USEC_FMT"\n"
- "_BOOT_ID=%s\n",
- cursor,
- realtime,
- monotonic,
- sd_id128_to_string(boot_id, sid));
-
- JOURNAL_FOREACH_DATA_RETVAL(j, data, length, r) {
-
- /* We already printed the boot id, from the data in
- * the header, hence let's suppress it here */
- if (length >= 9 &&
- startswith(data, "_BOOT_ID="))
- continue;
-
- if (utf8_is_printable_newline(data, length, false))
- fwrite(data, length, 1, f);
- else {
- 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, f);
- fputc('\n', f);
- le64 = htole64(length - (c - (const char*) data) - 1);
- fwrite(&le64, sizeof(le64), 1, f);
- fwrite(c + 1, length - (c - (const char*) data) - 1, 1, f);
- }
-
- fputc('\n', f);
- }
-
- if (r < 0)
- return r;
-
- fputc('\n', f);
-
- return 0;
-}
-
-void json_escape(
- FILE *f,
- const char* p,
- size_t l,
- OutputFlags flags) {
-
- assert(f);
- assert(p);
-
- if (!(flags & OUTPUT_SHOW_ALL) && l >= JSON_THRESHOLD)
-
- fputs("null", f);
-
- else if (!utf8_is_printable(p, l)) {
- bool not_first = false;
-
- fputs("[ ", f);
-
- while (l > 0) {
- if (not_first)
- fprintf(f, ", %u", (uint8_t) *p);
- else {
- not_first = true;
- fprintf(f, "%u", (uint8_t) *p);
- }
-
- p++;
- l--;
- }
-
- fputs(" ]", f);
- } else {
- fputc('\"', f);
-
- while (l > 0) {
- if (*p == '"' || *p == '\\') {
- fputc('\\', f);
- fputc(*p, f);
- } else if (*p == '\n')
- fputs("\\n", f);
- else if (*p < ' ')
- fprintf(f, "\\u%04x", *p);
- else
- fputc(*p, f);
-
- p++;
- l--;
- }
-
- fputc('\"', f);
- }
-}
-
-static int output_json(
- FILE *f,
- sd_journal *j,
- OutputMode mode,
- unsigned n_columns,
- OutputFlags flags) {
-
- uint64_t realtime, monotonic;
- _cleanup_free_ char *cursor = NULL;
- const void *data;
- size_t length;
- sd_id128_t boot_id;
- char sid[33], *k;
- int r;
- Hashmap *h = NULL;
- bool done, separator;
-
- assert(j);
-
- sd_journal_set_data_threshold(j, flags & OUTPUT_SHOW_ALL ? 0 : JSON_THRESHOLD);
-
- r = sd_journal_get_realtime_usec(j, &realtime);
- if (r < 0)
- return log_error_errno(r, "Failed to get realtime timestamp: %m");
-
- r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
- if (r < 0)
- return log_error_errno(r, "Failed to get monotonic timestamp: %m");
-
- r = sd_journal_get_cursor(j, &cursor);
- if (r < 0)
- return log_error_errno(r, "Failed to get cursor: %m");
-
- if (mode == OUTPUT_JSON_PRETTY)
- fprintf(f,
- "{\n"
- "\t\"__CURSOR\" : \"%s\",\n"
- "\t\"__REALTIME_TIMESTAMP\" : \""USEC_FMT"\",\n"
- "\t\"__MONOTONIC_TIMESTAMP\" : \""USEC_FMT"\",\n"
- "\t\"_BOOT_ID\" : \"%s\"",
- cursor,
- realtime,
- monotonic,
- sd_id128_to_string(boot_id, sid));
- else {
- if (mode == OUTPUT_JSON_SSE)
- fputs("data: ", f);
-
- fprintf(f,
- "{ \"__CURSOR\" : \"%s\", "
- "\"__REALTIME_TIMESTAMP\" : \""USEC_FMT"\", "
- "\"__MONOTONIC_TIMESTAMP\" : \""USEC_FMT"\", "
- "\"_BOOT_ID\" : \"%s\"",
- cursor,
- realtime,
- monotonic,
- sd_id128_to_string(boot_id, sid));
- }
-
- h = hashmap_new(&string_hash_ops);
- if (!h)
- return log_oom();
-
- /* First round, iterate through the entry and count how often each field appears */
- JOURNAL_FOREACH_DATA_RETVAL(j, data, length, r) {
- const char *eq;
- char *n;
- unsigned u;
-
- if (length >= 9 &&
- memcmp(data, "_BOOT_ID=", 9) == 0)
- continue;
-
- eq = memchr(data, '=', length);
- if (!eq)
- continue;
-
- n = strndup(data, eq - (const char*) data);
- if (!n) {
- r = log_oom();
- goto finish;
- }
-
- u = PTR_TO_UINT(hashmap_get(h, n));
- if (u == 0) {
- r = hashmap_put(h, n, UINT_TO_PTR(1));
- if (r < 0) {
- free(n);
- log_oom();
- goto finish;
- }
- } else {
- r = hashmap_update(h, n, UINT_TO_PTR(u + 1));
- free(n);
- if (r < 0) {
- log_oom();
- goto finish;
- }
- }
- }
-
- if (r < 0)
- return r;
-
- separator = true;
- do {
- done = true;
-
- SD_JOURNAL_FOREACH_DATA(j, data, length) {
- const char *eq;
- char *kk, *n;
- size_t m;
- unsigned u;
-
- /* 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;
-
- eq = memchr(data, '=', length);
- if (!eq)
- continue;
-
- if (separator) {
- if (mode == OUTPUT_JSON_PRETTY)
- fputs(",\n\t", f);
- else
- fputs(", ", f);
- }
-
- m = eq - (const char*) data;
-
- n = strndup(data, m);
- if (!n) {
- r = log_oom();
- goto finish;
- }
-
- u = PTR_TO_UINT(hashmap_get2(h, n, (void**) &kk));
- if (u == 0) {
- /* We already printed this, let's jump to the next */
- free(n);
- separator = false;
-
- continue;
- } else if (u == 1) {
- /* Field only appears once, output it directly */
-
- json_escape(f, data, m, flags);
- fputs(" : ", f);
-
- json_escape(f, eq + 1, length - m - 1, flags);
-
- hashmap_remove(h, n);
- free(kk);
- free(n);
-
- separator = true;
-
- continue;
-
- } else {
- /* Field appears multiple times, output it as array */
- json_escape(f, data, m, flags);
- fputs(" : [ ", f);
- json_escape(f, eq + 1, length - m - 1, flags);
-
- /* Iterate through the end of the list */
-
- while (sd_journal_enumerate_data(j, &data, &length) > 0) {
- if (length < m + 1)
- continue;
-
- if (memcmp(data, n, m) != 0)
- continue;
-
- if (((const char*) data)[m] != '=')
- continue;
-
- fputs(", ", f);
- json_escape(f, (const char*) data + m + 1, length - m - 1, flags);
- }
-
- fputs(" ]", f);
-
- hashmap_remove(h, n);
- free(kk);
- free(n);
-
- /* Iterate data fields form the beginning */
- done = false;
- separator = true;
-
- break;
- }
- }
-
- } while (!done);
-
- if (mode == OUTPUT_JSON_PRETTY)
- fputs("\n}\n", f);
- else if (mode == OUTPUT_JSON_SSE)
- fputs("}\n\n", f);
- else
- fputs(" }\n", f);
-
- r = 0;
-
-finish:
- while ((k = hashmap_steal_first_key(h)))
- free(k);
-
- hashmap_free(h);
-
- return r;
-}
-
-static int output_cat(
- FILE *f,
- sd_journal *j,
- OutputMode mode,
- unsigned n_columns,
- OutputFlags flags) {
-
- const void *data;
- size_t l;
- int r;
-
- assert(j);
- assert(f);
-
- sd_journal_set_data_threshold(j, 0);
-
- r = sd_journal_get_data(j, "MESSAGE", &data, &l);
- if (r < 0) {
- /* An entry without MESSAGE=? */
- if (r == -ENOENT)
- return 0;
-
- return log_error_errno(r, "Failed to get data: %m");
- }
-
- assert(l >= 8);
-
- fwrite((const char*) data + 8, 1, l - 8, f);
- fputc('\n', f);
-
- return 0;
-}
-
-static int (*output_funcs[_OUTPUT_MODE_MAX])(
- FILE *f,
- sd_journal*j,
- OutputMode mode,
- unsigned n_columns,
- OutputFlags flags) = {
-
- [OUTPUT_SHORT] = output_short,
- [OUTPUT_SHORT_ISO] = output_short,
- [OUTPUT_SHORT_PRECISE] = output_short,
- [OUTPUT_SHORT_MONOTONIC] = output_short,
- [OUTPUT_VERBOSE] = output_verbose,
- [OUTPUT_EXPORT] = output_export,
- [OUTPUT_JSON] = output_json,
- [OUTPUT_JSON_PRETTY] = output_json,
- [OUTPUT_JSON_SSE] = output_json,
- [OUTPUT_CAT] = output_cat
-};
-
-int output_journal(
- FILE *f,
- sd_journal *j,
- OutputMode mode,
- unsigned n_columns,
- OutputFlags flags,
- bool *ellipsized) {
-
- int ret;
- assert(mode >= 0);
- assert(mode < _OUTPUT_MODE_MAX);
-
- if (n_columns <= 0)
- n_columns = columns();
-
- ret = output_funcs[mode](f, j, mode, n_columns, flags);
- fflush(stdout);
-
- if (ellipsized && ret > 0)
- *ellipsized = true;
-
- return ret;
-}
-
-static int maybe_print_begin_newline(FILE *f, OutputFlags *flags) {
- assert(f);
- assert(flags);
-
- if (!(*flags & OUTPUT_BEGIN_NEWLINE))
- return 0;
-
- /* Print a beginning new line if that's request, but only once
- * on the first line we print. */
-
- fputc('\n', f);
- *flags &= ~OUTPUT_BEGIN_NEWLINE;
- return 0;
-}
-
-static int show_journal(FILE *f,
- sd_journal *j,
- OutputMode mode,
- unsigned n_columns,
- usec_t not_before,
- unsigned how_many,
- OutputFlags flags,
- bool *ellipsized) {
-
- int r;
- unsigned line = 0;
- bool need_seek = false;
- int warn_cutoff = flags & OUTPUT_WARN_CUTOFF;
-
- assert(j);
- assert(mode >= 0);
- assert(mode < _OUTPUT_MODE_MAX);
-
- /* Seek to end */
- r = sd_journal_seek_tail(j);
- if (r < 0)
- return log_error_errno(r, "Failed to seek to tail: %m");
-
- r = sd_journal_previous_skip(j, how_many);
- if (r < 0)
- return log_error_errno(r, "Failed to skip previous: %m");
-
- for (;;) {
- for (;;) {
- usec_t usec;
-
- if (need_seek) {
- r = sd_journal_next(j);
- if (r < 0)
- return log_error_errno(r, "Failed to iterate through journal: %m");
- }
-
- 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)
- return log_error_errno(r, "Failed to get journal time: %m");
-
- if (usec < not_before)
- continue;
- }
-
- line ++;
- maybe_print_begin_newline(f, &flags);
-
- r = output_journal(f, j, mode, n_columns, flags, ellipsized);
- if (r < 0)
- return r;
- }
-
- if (warn_cutoff && line < how_many && not_before > 0) {
- sd_id128_t boot_id;
- usec_t cutoff = 0;
-
- /* Check whether the cutoff line is too early */
-
- r = sd_id128_get_boot(&boot_id);
- if (r < 0)
- return log_error_errno(r, "Failed to get boot id: %m");
-
- r = sd_journal_get_cutoff_monotonic_usec(j, boot_id, &cutoff, NULL);
- if (r < 0)
- return log_error_errno(r, "Failed to get journal cutoff time: %m");
-
- if (r > 0 && not_before < cutoff) {
- maybe_print_begin_newline(f, &flags);
- fprintf(f, "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_INFINITY);
- if (r < 0)
- return log_error_errno(r, "Failed to wait for journal: %m");
-
- }
-
- return 0;
-}
-
-int add_matches_for_unit(sd_journal *j, const char *unit) {
- int r;
- char *m1, *m2, *m3, *m4;
-
- assert(j);
- assert(unit);
-
- m1 = strjoina("_SYSTEMD_UNIT=", unit);
- m2 = strjoina("COREDUMP_UNIT=", unit);
- m3 = strjoina("UNIT=", unit);
- m4 = strjoina("OBJECT_SYSTEMD_UNIT=", unit);
-
- (void)(
- /* Look for messages from the service itself */
- (r = sd_journal_add_match(j, m1, 0)) ||
-
- /* Look for coredumps of the service */
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1", 0)) ||
- (r = sd_journal_add_match(j, "_UID=0", 0)) ||
- (r = sd_journal_add_match(j, m2, 0)) ||
-
- /* Look for messages from PID 1 about this service */
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, "_PID=1", 0)) ||
- (r = sd_journal_add_match(j, m3, 0)) ||
-
- /* Look for messages from authorized daemons about this service */
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, "_UID=0", 0)) ||
- (r = sd_journal_add_match(j, m4, 0))
- );
-
- if (r == 0 && endswith(unit, ".slice")) {
- char *m5 = strappend("_SYSTEMD_SLICE=", unit);
-
- /* Show all messages belonging to a slice */
- (void)(
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, m5, 0))
- );
- }
-
- return r;
-}
-
-int add_matches_for_user_unit(sd_journal *j, const char *unit, uid_t uid) {
- int r;
- char *m1, *m2, *m3, *m4;
- char muid[sizeof("_UID=") + DECIMAL_STR_MAX(uid_t)];
-
- assert(j);
- assert(unit);
-
- m1 = strjoina("_SYSTEMD_USER_UNIT=", unit);
- m2 = strjoina("USER_UNIT=", unit);
- m3 = strjoina("COREDUMP_USER_UNIT=", unit);
- m4 = strjoina("OBJECT_SYSTEMD_USER_UNIT=", unit);
- sprintf(muid, "_UID="UID_FMT, uid);
-
- (void) (
- /* Look for messages from the user service itself */
- (r = sd_journal_add_match(j, m1, 0)) ||
- (r = sd_journal_add_match(j, muid, 0)) ||
-
- /* Look for messages from systemd about this service */
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, m2, 0)) ||
- (r = sd_journal_add_match(j, muid, 0)) ||
-
- /* Look for coredumps of the service */
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, m3, 0)) ||
- (r = sd_journal_add_match(j, muid, 0)) ||
- (r = sd_journal_add_match(j, "_UID=0", 0)) ||
-
- /* Look for messages from authorized daemons about this service */
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, m4, 0)) ||
- (r = sd_journal_add_match(j, muid, 0)) ||
- (r = sd_journal_add_match(j, "_UID=0", 0))
- );
-
- if (r == 0 && endswith(unit, ".slice")) {
- char *m5 = strappend("_SYSTEMD_SLICE=", unit);
-
- /* Show all messages belonging to a slice */
- (void)(
- (r = sd_journal_add_disjunction(j)) ||
- (r = sd_journal_add_match(j, m5, 0)) ||
- (r = sd_journal_add_match(j, muid, 0))
- );
- }
-
- return r;
-}
-
-static int get_boot_id_for_machine(const char *machine, sd_id128_t *boot_id) {
- _cleanup_close_pair_ int pair[2] = { -1, -1 };
- _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, rootfd = -1;
- pid_t pid, child;
- siginfo_t si;
- char buf[37];
- ssize_t k;
- int r;
-
- assert(machine);
- assert(boot_id);
-
- if (!machine_name_is_valid(machine))
- return -EINVAL;
-
- r = container_get_leader(machine, &pid);
- if (r < 0)
- return r;
-
- r = namespace_open(pid, &pidnsfd, &mntnsfd, NULL, &rootfd);
- if (r < 0)
- return r;
-
- if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0)
- return -errno;
-
- child = fork();
- if (child < 0)
- return -errno;
-
- if (child == 0) {
- int fd;
-
- pair[0] = safe_close(pair[0]);
-
- r = namespace_enter(pidnsfd, mntnsfd, -1, rootfd);
- if (r < 0)
- _exit(EXIT_FAILURE);
-
- fd = open("/proc/sys/kernel/random/boot_id", O_RDONLY|O_CLOEXEC|O_NOCTTY);
- if (fd < 0)
- _exit(EXIT_FAILURE);
-
- r = loop_read_exact(fd, buf, 36, false);
- safe_close(fd);
- if (r < 0)
- _exit(EXIT_FAILURE);
-
- k = send(pair[1], buf, 36, MSG_NOSIGNAL);
- if (k != 36)
- _exit(EXIT_FAILURE);
-
- _exit(EXIT_SUCCESS);
- }
-
- pair[1] = safe_close(pair[1]);
-
- r = wait_for_terminate(child, &si);
- if (r < 0 || si.si_code != CLD_EXITED || si.si_status != EXIT_SUCCESS)
- return r < 0 ? r : -EIO;
-
- k = recv(pair[0], buf, 36, 0);
- if (k != 36)
- return -EIO;
-
- buf[36] = 0;
- r = sd_id128_from_string(buf, boot_id);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-int add_match_this_boot(sd_journal *j, const char *machine) {
- char match[9+32+1] = "_BOOT_ID=";
- sd_id128_t boot_id;
- int r;
-
- assert(j);
-
- if (machine) {
- r = get_boot_id_for_machine(machine, &boot_id);
- if (r < 0)
- return log_error_errno(r, "Failed to get boot id of container %s: %m", machine);
- } else {
- r = sd_id128_get_boot(&boot_id);
- if (r < 0)
- return log_error_errno(r, "Failed to get boot id: %m");
- }
-
- sd_id128_to_string(boot_id, match + 9);
- r = sd_journal_add_match(j, match, strlen(match));
- if (r < 0)
- return log_error_errno(r, "Failed to add match: %m");
-
- r = sd_journal_add_conjunction(j);
- if (r < 0)
- return log_error_errno(r, "Failed to add conjunction: %m");
-
- return 0;
-}
-
-int show_journal_by_unit(
- FILE *f,
- const char *unit,
- OutputMode mode,
- unsigned n_columns,
- usec_t not_before,
- unsigned how_many,
- uid_t uid,
- OutputFlags flags,
- int journal_open_flags,
- bool system_unit,
- bool *ellipsized) {
-
- _cleanup_journal_close_ sd_journal*j = NULL;
- int r;
-
- assert(mode >= 0);
- assert(mode < _OUTPUT_MODE_MAX);
- assert(unit);
-
- if (how_many <= 0)
- return 0;
-
- r = sd_journal_open(&j, journal_open_flags);
- if (r < 0)
- return log_error_errno(r, "Failed to open journal: %m");
-
- r = add_match_this_boot(j, NULL);
- if (r < 0)
- return r;
-
- if (system_unit)
- r = add_matches_for_unit(j, unit);
- else
- r = add_matches_for_user_unit(j, unit, uid);
- if (r < 0)
- return log_error_errno(r, "Failed to add unit matches: %m");
-
- if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) {
- _cleanup_free_ char *filter;
-
- filter = journal_make_match_string(j);
- if (!filter)
- return log_oom();
-
- log_debug("Journal filter: %s", filter);
- }
-
- return show_journal(f, j, mode, n_columns, not_before, how_many, flags, ellipsized);
-}
-
-static const char *const output_mode_table[_OUTPUT_MODE_MAX] = {
- [OUTPUT_SHORT] = "short",
- [OUTPUT_SHORT_ISO] = "short-iso",
- [OUTPUT_SHORT_PRECISE] = "short-precise",
- [OUTPUT_SHORT_MONOTONIC] = "short-monotonic",
- [OUTPUT_VERBOSE] = "verbose",
- [OUTPUT_EXPORT] = "export",
- [OUTPUT_JSON] = "json",
- [OUTPUT_JSON_PRETTY] = "json-pretty",
- [OUTPUT_JSON_SSE] = "json-sse",
- [OUTPUT_CAT] = "cat"
-};
-
-DEFINE_STRING_TABLE_LOOKUP(output_mode, OutputMode);
~ianmdlvl / elogind.git / blobdiff