summaryrefslogtreecommitdiffstats
path: root/src/shared/logs-show.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/shared/logs-show.c')
-rw-r--r--src/shared/logs-show.c1462
1 files changed, 1462 insertions, 0 deletions
diff --git a/src/shared/logs-show.c b/src/shared/logs-show.c
new file mode 100644
index 0000000..15ef0f1
--- /dev/null
+++ b/src/shared/logs-show.c
@@ -0,0 +1,1462 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <syslog.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "sd-id128.h"
+#include "sd-journal.h"
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "format-util.h"
+#include "hashmap.h"
+#include "hostname-util.h"
+#include "io-util.h"
+#include "journal-internal.h"
+#include "json.h"
+#include "log.h"
+#include "logs-show.h"
+#include "macro.h"
+#include "output-mode.h"
+#include "parse-util.h"
+#include "process-util.h"
+#include "sparse-endian.h"
+#include "stdio-util.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "terminal-util.h"
+#include "time-util.h"
+#include "utf8.h"
+#include "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 4096U
+
+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, size_t field_len, char **target, size_t *target_len) {
+ size_t nl;
+ char *buf;
+
+ assert(data);
+ assert(field);
+ assert(target);
+
+ if (length < field_len)
+ return 0;
+
+ if (memcmp(data, field, field_len))
+ return 0;
+
+ nl = length - field_len;
+
+ buf = newdup_suffix0(char, (const char*) data + field_len, nl);
+ if (!buf)
+ return log_oom();
+
+ free(*target);
+ *target = buf;
+
+ if (target_len)
+ *target_len = nl;
+
+ return 1;
+}
+
+typedef struct ParseFieldVec {
+ const char *field;
+ size_t field_len;
+ char **target;
+ size_t *target_len;
+} ParseFieldVec;
+
+#define PARSE_FIELD_VEC_ENTRY(_field, _target, _target_len) \
+ { .field = _field, .field_len = strlen(_field), .target = _target, .target_len = _target_len }
+
+static int parse_fieldv(const void *data, size_t length, const ParseFieldVec *fields, unsigned n_fields) {
+ unsigned i;
+
+ for (i = 0; i < n_fields; i++) {
+ const ParseFieldVec *f = &fields[i];
+ int r;
+
+ r = parse_field(data, length, f->field, f->field_len, f->target, f->target_len);
+ if (r < 0)
+ return r;
+ else if (r > 0)
+ break;
+ }
+
+ return 0;
+}
+
+static int field_set_test(Set *fields, const char *name, size_t n) {
+ char *s = NULL;
+
+ if (!fields)
+ return 1;
+
+ s = strndupa(name, n);
+ if (!s)
+ return log_oom();
+
+ return set_get(fields, s) ? 1 : 0;
+}
+
+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,
+ size_t highlight[2]) {
+
+ const char *color_on = "", *color_off = "", *highlight_on = "";
+ const char *pos, *end;
+ bool ellipsized = false;
+ int line = 0;
+
+ if (flags & OUTPUT_COLOR) {
+ if (priority <= LOG_ERR) {
+ color_on = ANSI_HIGHLIGHT_RED;
+ color_off = ANSI_NORMAL;
+ highlight_on = ANSI_HIGHLIGHT;
+ } else if (priority <= LOG_NOTICE) {
+ color_on = ANSI_HIGHLIGHT;
+ color_off = ANSI_NORMAL;
+ highlight_on = ANSI_HIGHLIGHT_RED;
+ } else if (priority >= LOG_DEBUG) {
+ color_on = ANSI_GREY;
+ color_off = ANSI_NORMAL;
+ highlight_on = ANSI_HIGHLIGHT_RED;
+ }
+ }
+
+ /* 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)) {
+ if (highlight &&
+ (size_t) (pos - message) <= highlight[0] &&
+ highlight[0] < (size_t) len) {
+
+ fprintf(f, "%*s%s%.*s",
+ continuation * prefix, "",
+ color_on, (int) highlight[0], pos);
+ fprintf(f, "%s%.*s",
+ highlight_on,
+ (int) (MIN((size_t) len, highlight[1]) - highlight[0]),
+ pos + highlight[0]);
+ if ((size_t) len > highlight[1])
+ fprintf(f, "%s%.*s",
+ color_on,
+ (int) (len - highlight[1]),
+ pos + highlight[1]);
+ fprintf(f, "%s\n", color_off);
+
+ } else
+ 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_timestamp_monotonic(FILE *f, sd_journal *j, const char *monotonic) {
+ sd_id128_t boot_id;
+ uint64_t t;
+ int r;
+
+ assert(f);
+ assert(j);
+
+ r = -ENXIO;
+ 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, "[%5"PRI_USEC".%06"PRI_USEC"]", t / USEC_PER_SEC, t % USEC_PER_SEC);
+ return 1 + 5 + 1 + 6 + 1;
+}
+
+static int output_timestamp_realtime(FILE *f, sd_journal *j, OutputMode mode, OutputFlags flags, const char *realtime) {
+ char buf[MAX(FORMAT_TIMESTAMP_MAX, 64)];
+ struct tm *(*gettime_r)(const time_t *, struct tm *);
+ struct tm tm;
+ uint64_t x;
+ time_t t;
+ int r;
+
+ assert(f);
+ assert(j);
+
+ if (realtime)
+ r = safe_atou64(realtime, &x);
+ if (!realtime || r < 0 || !VALID_REALTIME(x))
+ r = sd_journal_get_realtime_usec(j, &x);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get realtime timestamp: %m");
+
+ if (IN_SET(mode, OUTPUT_SHORT_FULL, OUTPUT_WITH_UNIT)) {
+ const char *k;
+
+ if (flags & OUTPUT_UTC)
+ k = format_timestamp_utc(buf, sizeof(buf), x);
+ else
+ k = format_timestamp(buf, sizeof(buf), x);
+ if (!k)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to format timestamp: %" PRIu64, x);
+
+ } else {
+ char usec[7];
+
+ gettime_r = (flags & OUTPUT_UTC) ? gmtime_r : localtime_r;
+ t = (time_t) (x / USEC_PER_SEC);
+
+ switch (mode) {
+
+ case OUTPUT_SHORT_UNIX:
+ xsprintf(buf, "%10"PRI_TIME".%06"PRIu64, t, x % USEC_PER_SEC);
+ break;
+
+ case OUTPUT_SHORT_ISO:
+ if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S%z", gettime_r(&t, &tm)) <= 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to format ISO time");
+ break;
+
+ case OUTPUT_SHORT_ISO_PRECISE:
+ /* No usec in strftime, so we leave space and copy over */
+ if (strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S.xxxxxx%z", gettime_r(&t, &tm)) <= 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to format ISO-precise time");
+ xsprintf(usec, "%06"PRI_USEC, x % USEC_PER_SEC);
+ memcpy(buf + 20, usec, 6);
+ break;
+
+ case OUTPUT_SHORT:
+ case OUTPUT_SHORT_PRECISE:
+
+ if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", gettime_r(&t, &tm)) <= 0)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to format syslog time");
+
+ if (mode == OUTPUT_SHORT_PRECISE) {
+ size_t k;
+
+ assert(sizeof(buf) > strlen(buf));
+ k = sizeof(buf) - strlen(buf);
+
+ r = snprintf(buf + strlen(buf), k, ".%06"PRIu64, x % USEC_PER_SEC);
+ if (r <= 0 || (size_t) r >= k) /* too long? */
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Failed to format precise time");
+ }
+ break;
+
+ default:
+ assert_not_reached("Unknown time format");
+ }
+ }
+
+ fputs(buf, f);
+ return (int) strlen(buf);
+}
+
+static int output_short(
+ FILE *f,
+ sd_journal *j,
+ OutputMode mode,
+ unsigned n_columns,
+ OutputFlags flags,
+ Set *output_fields,
+ const size_t highlight[2]) {
+
+ 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, *unit = NULL, *user_unit = 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, unit_len = 0, user_unit_len = 0;
+ int p = LOG_INFO;
+ bool ellipsized = false;
+ const ParseFieldVec fields[] = {
+ PARSE_FIELD_VEC_ENTRY("_PID=", &pid, &pid_len),
+ PARSE_FIELD_VEC_ENTRY("_COMM=", &comm, &comm_len),
+ PARSE_FIELD_VEC_ENTRY("MESSAGE=", &message, &message_len),
+ PARSE_FIELD_VEC_ENTRY("PRIORITY=", &priority, &priority_len),
+ PARSE_FIELD_VEC_ENTRY("_HOSTNAME=", &hostname, &hostname_len),
+ PARSE_FIELD_VEC_ENTRY("SYSLOG_PID=", &fake_pid, &fake_pid_len),
+ PARSE_FIELD_VEC_ENTRY("SYSLOG_IDENTIFIER=", &identifier, &identifier_len),
+ PARSE_FIELD_VEC_ENTRY("_SOURCE_REALTIME_TIMESTAMP=", &realtime, &realtime_len),
+ PARSE_FIELD_VEC_ENTRY("_SOURCE_MONOTONIC_TIMESTAMP=", &monotonic, &monotonic_len),
+ PARSE_FIELD_VEC_ENTRY("_SYSTEMD_UNIT=", &unit, &unit_len),
+ PARSE_FIELD_VEC_ENTRY("_SYSTEMD_USER_UNIT=", &user_unit, &user_unit_len),
+ };
+ size_t highlight_shifted[] = {highlight ? highlight[0] : 0, highlight ? highlight[1] : 0};
+
+ 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_fieldv(data, length, fields, ELEMENTSOF(fields));
+ if (r < 0)
+ return r;
+ }
+ if (r == -EBADMSG) {
+ log_debug_errno(r, "Skipping message we can't read: %m");
+ return 0;
+ }
+ 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, highlight_shifted);
+
+ if (priority_len == 1 && *priority >= '0' && *priority <= '7')
+ p = *priority - '0';
+
+ if (mode == OUTPUT_SHORT_MONOTONIC)
+ r = output_timestamp_monotonic(f, j, monotonic);
+ else
+ r = output_timestamp_realtime(f, j, mode, flags, realtime);
+ if (r < 0)
+ return r;
+ n += r;
+
+ if (flags & OUTPUT_NO_HOSTNAME) {
+ /* Suppress display of the hostname if this is requested. */
+ hostname = mfree(hostname);
+ hostname_len = 0;
+ }
+
+ if (hostname && shall_print(hostname, hostname_len, flags)) {
+ fprintf(f, " %.*s", (int) hostname_len, hostname);
+ n += hostname_len + 1;
+ }
+
+ if (mode == OUTPUT_WITH_UNIT && ((unit && shall_print(unit, unit_len, flags)) || (user_unit && shall_print(user_unit, user_unit_len, flags)))) {
+ if (unit) {
+ fprintf(f, " %.*s", (int) unit_len, unit);
+ n += unit_len + 1;
+ }
+ if (user_unit) {
+ if (unit)
+ fprintf(f, "/%.*s", (int) user_unit_len, user_unit);
+ else
+ fprintf(f, " %.*s", (int) user_unit_len, user_unit);
+ n += unit_len + 1;
+ }
+ } else 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,
+ highlight_shifted);
+ }
+
+ 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,
+ Set *output_fields,
+ const size_t highlight[2]) {
+
+ const void *data;
+ size_t length;
+ _cleanup_free_ char *cursor = NULL;
+ uint64_t realtime = 0;
+ char ts[FORMAT_TIMESTAMP_MAX + 7];
+ const char *timestamp;
+ 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;
+
+ r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=",
+ STRLEN("_SOURCE_REALTIME_TIMESTAMP="), &value,
+ NULL);
+ if (r < 0)
+ return r;
+ assert(r > 0);
+
+ 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");
+
+ timestamp = flags & OUTPUT_UTC ? format_timestamp_us_utc(ts, sizeof ts, realtime)
+ : format_timestamp_us(ts, sizeof ts, realtime);
+ fprintf(f, "%s [%s]\n",
+ timestamp ?: "(no timestamp)",
+ cursor);
+
+ JOURNAL_FOREACH_DATA_RETVAL(j, data, length, r) {
+ const char *c;
+ int fieldlen;
+ const char *on = "", *off = "";
+
+ c = memchr(data, '=', length);
+ if (!c)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Invalid field.");
+ fieldlen = c - (const char*) data;
+
+ r = field_set_test(output_fields, data, fieldlen);
+ if (r < 0)
+ return r;
+ if (!r)
+ continue;
+
+ if (flags & OUTPUT_COLOR && startswith(data, "MESSAGE=")) {
+ on = ANSI_HIGHLIGHT;
+ off = ANSI_NORMAL;
+ }
+
+ 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, NULL);
+ 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,
+ Set *output_fields,
+ const size_t highlight[2]) {
+
+ 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) {
+ const char *c;
+
+ /* We already printed the boot id from the data in the header, hence let's suppress it here */
+ if (memory_startswith(data, length, "_BOOT_ID="))
+ continue;
+
+ c = memchr(data, '=', length);
+ if (!c)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Invalid field.");
+
+ r = field_set_test(output_fields, data, c - (const char *) data);
+ if (r < 0)
+ return r;
+ if (!r)
+ continue;
+
+ if (utf8_is_printable_newline(data, length, false))
+ fwrite(data, length, 1, f);
+ else {
+ uint64_t le64;
+
+ 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 == -EBADMSG) {
+ log_debug_errno(r, "Skipping message we can't read: %m");
+ return 0;
+ }
+
+ 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 (!(flags & OUTPUT_SHOW_ALL) && !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 (IN_SET(*p, '"', '\\')) {
+ fputc('\\', f);
+ fputc(*p, f);
+ } else if (*p == '\n')
+ fputs("\\n", f);
+ else if ((uint8_t) *p < ' ')
+ fprintf(f, "\\u%04x", (uint8_t) *p);
+ else
+ fputc(*p, f);
+
+ p++;
+ l--;
+ }
+
+ fputc('"', f);
+ }
+}
+
+struct json_data {
+ JsonVariant* name;
+ size_t n_values;
+ JsonVariant* values[];
+};
+
+static int update_json_data(
+ Hashmap *h,
+ OutputFlags flags,
+ const char *name,
+ const void *value,
+ size_t size) {
+
+ _cleanup_(json_variant_unrefp) JsonVariant *v = NULL;
+ struct json_data *d;
+ int r;
+
+ if (!(flags & OUTPUT_SHOW_ALL) && strlen(name) + 1 + size >= JSON_THRESHOLD)
+ r = json_variant_new_null(&v);
+ else if (utf8_is_printable(value, size))
+ r = json_variant_new_stringn(&v, value, size);
+ else
+ r = json_variant_new_array_bytes(&v, value, size);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate JSON data: %m");
+
+ d = hashmap_get(h, name);
+ if (d) {
+ struct json_data *w;
+
+ w = realloc(d, offsetof(struct json_data, values) + sizeof(JsonVariant*) * (d->n_values + 1));
+ if (!w)
+ return log_oom();
+
+ d = w;
+ assert_se(hashmap_update(h, json_variant_string(d->name), d) >= 0);
+ } else {
+ _cleanup_(json_variant_unrefp) JsonVariant *n = NULL;
+
+ r = json_variant_new_string(&n, name);
+ if (r < 0)
+ return log_error_errno(r, "Failed to allocate JSON name variant: %m");
+
+ d = malloc0(offsetof(struct json_data, values) + sizeof(JsonVariant*));
+ if (!d)
+ return log_oom();
+
+ r = hashmap_put(h, json_variant_string(n), d);
+ if (r < 0) {
+ free(d);
+ return log_error_errno(r, "Failed to insert JSON name into hashmap: %m");
+ }
+
+ d->name = TAKE_PTR(n);
+ }
+
+ d->values[d->n_values++] = TAKE_PTR(v);
+ return 0;
+}
+
+static int update_json_data_split(
+ Hashmap *h,
+ OutputFlags flags,
+ Set *output_fields,
+ const void *data,
+ size_t size) {
+
+ const char *eq;
+ char *name;
+
+ assert(h);
+ assert(data || size == 0);
+
+ if (memory_startswith(data, size, "_BOOT_ID="))
+ return 0;
+
+ eq = memchr(data, '=', MIN(size, JSON_THRESHOLD));
+ if (!eq)
+ return 0;
+
+ if (eq == data)
+ return 0;
+
+ name = strndupa(data, eq - (const char*) data);
+ if (output_fields && !set_get(output_fields, name))
+ return 0;
+
+ return update_json_data(h, flags, name, eq + 1, size - (eq - (const char*) data) - 1);
+}
+
+static int output_json(
+ FILE *f,
+ sd_journal *j,
+ OutputMode mode,
+ unsigned n_columns,
+ OutputFlags flags,
+ Set *output_fields,
+ const size_t highlight[2]) {
+
+ char sid[SD_ID128_STRING_MAX], usecbuf[DECIMAL_STR_MAX(usec_t)];
+ _cleanup_(json_variant_unrefp) JsonVariant *object = NULL;
+ _cleanup_free_ char *cursor = NULL;
+ uint64_t realtime, monotonic;
+ JsonVariant **array = NULL;
+ struct json_data *d;
+ sd_id128_t boot_id;
+ Hashmap *h = NULL;
+ size_t n = 0;
+ Iterator i;
+ int r;
+
+ assert(j);
+
+ (void) 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");
+
+ h = hashmap_new(&string_hash_ops);
+ if (!h)
+ return log_oom();
+
+ r = update_json_data(h, flags, "__CURSOR", cursor, strlen(cursor));
+ if (r < 0)
+ goto finish;
+
+ xsprintf(usecbuf, USEC_FMT, realtime);
+ r = update_json_data(h, flags, "__REALTIME_TIMESTAMP", usecbuf, strlen(usecbuf));
+ if (r < 0)
+ goto finish;
+
+ xsprintf(usecbuf, USEC_FMT, monotonic);
+ r = update_json_data(h, flags, "__MONOTONIC_TIMESTAMP", usecbuf, strlen(usecbuf));
+ if (r < 0)
+ goto finish;
+
+ sd_id128_to_string(boot_id, sid);
+ r = update_json_data(h, flags, "_BOOT_ID", sid, strlen(sid));
+ if (r < 0)
+ goto finish;
+
+ for (;;) {
+ const void *data;
+ size_t size;
+
+ r = sd_journal_enumerate_data(j, &data, &size);
+ if (r == -EBADMSG) {
+ log_debug_errno(r, "Skipping message we can't read: %m");
+ r = 0;
+ goto finish;
+ }
+ if (r < 0) {
+ log_error_errno(r, "Failed to read journal: %m");
+ goto finish;
+ }
+ if (r == 0)
+ break;
+
+ r = update_json_data_split(h, flags, output_fields, data, size);
+ if (r < 0)
+ goto finish;
+ }
+
+ array = new(JsonVariant*, hashmap_size(h)*2);
+ if (!array) {
+ r = log_oom();
+ goto finish;
+ }
+
+ HASHMAP_FOREACH(d, h, i) {
+ assert(d->n_values > 0);
+
+ array[n++] = json_variant_ref(d->name);
+
+ if (d->n_values == 1)
+ array[n++] = json_variant_ref(d->values[0]);
+ else {
+ _cleanup_(json_variant_unrefp) JsonVariant *q = NULL;
+
+ r = json_variant_new_array(&q, d->values, d->n_values);
+ if (r < 0) {
+ log_error_errno(r, "Failed to create JSON array: %m");
+ goto finish;
+ }
+
+ array[n++] = TAKE_PTR(q);
+ }
+ }
+
+ r = json_variant_new_object(&object, array, n);
+ if (r < 0) {
+ log_error_errno(r, "Failed to allocate JSON object: %m");
+ goto finish;
+ }
+
+ json_variant_dump(object,
+ output_mode_to_json_format_flags(mode) |
+ (FLAGS_SET(flags, OUTPUT_COLOR) ? JSON_FORMAT_COLOR : 0),
+ f, NULL);
+
+ r = 0;
+
+finish:
+ while ((d = hashmap_steal_first(h))) {
+ size_t k;
+
+ json_variant_unref(d->name);
+ for (k = 0; k < d->n_values; k++)
+ json_variant_unref(d->values[k]);
+
+ free(d);
+ }
+
+ hashmap_free(h);
+
+ json_variant_unref_many(array, n);
+ free(array);
+
+ return r;
+}
+
+static int output_cat(
+ FILE *f,
+ sd_journal *j,
+ OutputMode mode,
+ unsigned n_columns,
+ OutputFlags flags,
+ Set *output_fields,
+ const size_t highlight[2]) {
+
+ const void *data;
+ size_t l;
+ int r;
+ const char *highlight_on = "", *highlight_off = "";
+
+ assert(j);
+ assert(f);
+
+ if (flags & OUTPUT_COLOR) {
+ highlight_on = ANSI_HIGHLIGHT_RED;
+ highlight_off = ANSI_NORMAL;
+ }
+
+ sd_journal_set_data_threshold(j, 0);
+
+ r = sd_journal_get_data(j, "MESSAGE", &data, &l);
+ if (r == -EBADMSG) {
+ log_debug_errno(r, "Skipping message we can't read: %m");
+ return 0;
+ }
+ 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);
+
+ if (highlight && (flags & OUTPUT_COLOR)) {
+ assert(highlight[0] <= highlight[1]);
+ assert(highlight[1] <= l - 8);
+
+ fwrite((const char*) data + 8, 1, highlight[0], f);
+ fwrite(highlight_on, 1, strlen(highlight_on), f);
+ fwrite((const char*) data + 8 + highlight[0], 1, highlight[1] - highlight[0], f);
+ fwrite(highlight_off, 1, strlen(highlight_off), f);
+ fwrite((const char*) data + 8 + highlight[1], 1, l - 8 - highlight[1], f);
+ } else
+ 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,
+ Set *output_fields,
+ const size_t highlight[2]) = {
+
+ [OUTPUT_SHORT] = output_short,
+ [OUTPUT_SHORT_ISO] = output_short,
+ [OUTPUT_SHORT_ISO_PRECISE] = output_short,
+ [OUTPUT_SHORT_PRECISE] = output_short,
+ [OUTPUT_SHORT_MONOTONIC] = output_short,
+ [OUTPUT_SHORT_UNIX] = output_short,
+ [OUTPUT_SHORT_FULL] = 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_JSON_SEQ] = output_json,
+ [OUTPUT_CAT] = output_cat,
+ [OUTPUT_WITH_UNIT] = output_short,
+};
+
+int show_journal_entry(
+ FILE *f,
+ sd_journal *j,
+ OutputMode mode,
+ unsigned n_columns,
+ OutputFlags flags,
+ char **output_fields,
+ const size_t highlight[2],
+ bool *ellipsized) {
+
+ int ret;
+ _cleanup_set_free_free_ Set *fields = NULL;
+ assert(mode >= 0);
+ assert(mode < _OUTPUT_MODE_MAX);
+
+ if (n_columns <= 0)
+ n_columns = columns();
+
+ if (output_fields) {
+ fields = set_new(&string_hash_ops);
+ if (!fields)
+ return log_oom();
+
+ ret = set_put_strdupv(fields, output_fields);
+ if (ret < 0)
+ return ret;
+ }
+
+ ret = output_funcs[mode](f, j, mode, n_columns, flags, fields, highlight);
+
+ 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;
+}
+
+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);
+
+ if (how_many == (unsigned) -1)
+ need_seek = true;
+ else {
+ /* 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 = show_journal_entry(f, j, mode, n_columns, flags, NULL, NULL, 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) {
+ const char *m1, *m2, *m3, *m4;
+ int r;
+
+ 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")) {
+ const char *m5;
+
+ m5 = strjoina("_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")) {
+ const char *m5;
+
+ m5 = strjoina("_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;
+ 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, NULL, &rootfd);
+ if (r < 0)
+ return r;
+
+ if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pair) < 0)
+ return -errno;
+
+ r = namespace_fork("(sd-bootidns)", "(sd-bootid)", NULL, 0, FORK_RESET_SIGNALS|FORK_DEATHSIG,
+ pidnsfd, mntnsfd, -1, -1, rootfd, &child);
+ if (r < 0)
+ return r;
+ if (r == 0) {
+ int fd;
+
+ pair[0] = safe_close(pair[0]);
+
+ 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_and_check("(sd-bootidns)", child, 0);
+ if (r < 0)
+ return r;
+ if (r != EXIT_SUCCESS)
+ return -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_(sd_journal_closep) 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 (DEBUG_LOGGING) {
+ _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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-16 23:24:55 +0000