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61ad59b131
systemd/src/shared/logs-show.c
Tomasz Torcz 44bc6e1fe0 journalctl: add ”short-iso” output format with verbose ISO8601 timestamps 
Example:
2013-07-18T10:10:01+0200 sandworm CROND[20957]: (root) CMD (/usr/lib64/sa/sa1 1 1)
2013-07-18 15:58:49 +02:00

1095 lines
34 KiB
C
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <time.h>
#include <assert.h>
#include <errno.h>
#include <sys/poll.h>
#include <string.h>
#include "logs-show.h"
#include "log.h"
#include "util.h"
#include "utf8.h"
#include "hashmap.h"
#include "journal-internal.h"
#define PRINT_THRESHOLD 128
#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_THRESHOLD)
return false;
if (!utf8_is_printable(p, l))
return false;
return true;
}
static void print_multiline(FILE *f, unsigned prefix, unsigned n_columns, OutputMode flags, int priority, const char* message, size_t message_len) {
const char *color_on = "", *color_off = "";
const char *pos, *end;
bool continuation = false;
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;
}
}
for (pos = message; pos < message + message_len; pos = end + 1) {
int len;
for (end = pos; end < message + message_len && *end != '\n'; end++)
;
len = end - pos;
assert(len >= 0);
if (flags & (OUTPUT_FULL_WIDTH | OUTPUT_SHOW_ALL) || prefix + len + 1 < n_columns)
fprintf(f, "%*s%s%.*s%s\n",
continuation * prefix, "",
color_on, len, pos, color_off);
else if (prefix < n_columns && n_columns - prefix >= 3) {
_cleanup_free_ char *e;
e = ellipsize_mem(pos, len, n_columns - prefix, 90);
if (!e)
fprintf(f, "%s%.*s%s\n", color_on, len, pos, color_off);
else
fprintf(f, "%s%s%s\n", color_on, e, color_off);
} else
fputs("...\n", f);
continuation = true;
}
}
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;
assert(f);
assert(j);
sd_journal_set_data_threshold(j, flags & OUTPUT_SHOW_ALL ? 0 : PRINT_THRESHOLD);
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 r;
if (!message)
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) {
log_error("Failed to get monotonic timestamp: %s", strerror(-r));
return r;
}
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;
r = -ENOENT;
if (realtime)
r = safe_atou64(realtime, &x);
if (r < 0)
r = sd_journal_get_realtime_usec(j, &x);
if (r < 0) {
log_error("Failed to get realtime timestamp: %s", strerror(-r));
return r;
}
t = (time_t) (x / USEC_PER_SEC);
if (mode == OUTPUT_SHORT_ISO)
r = strftime(buf, sizeof(buf), "%Y-%m-%dT%H:%M:%S%z", localtime_r(&t, &tm));
else
r = strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_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
fputc(' ', 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);
print_multiline(f, n + 2, n_columns, flags, p, message, message_len);
}
if (flags & OUTPUT_CATALOG)
print_catalog(f, j);
return 0;
}
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];
int r;
assert(f);
assert(j);
sd_journal_set_data_threshold(j, 0);
r = sd_journal_get_realtime_usec(j, &realtime);
if (r < 0) {
log_full(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_ERR,
"Failed to get realtime timestamp: %s", strerror(-r));
return r;
}
r = sd_journal_get_cursor(j, &cursor);
if (r < 0) {
log_error("Failed to get cursor: %s", strerror(-r));
return r;
}
fprintf(f, "%s [%s]\n",
format_timestamp(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_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) {
log_error("Failed to get realtime timestamp: %s", strerror(-r));
return r;
}
r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
if (r < 0) {
log_error("Failed to get monotonic timestamp: %s", strerror(-r));
return r;
}
r = sd_journal_get_cursor(j, &cursor);
if (r < 0) {
log_error("Failed to get cursor: %s", strerror(-r));
return r;
}
fprintf(f,
"__CURSOR=%s\n"
"__REALTIME_TIMESTAMP=%llu\n"
"__MONOTONIC_TIMESTAMP=%llu\n"
"_BOOT_ID=%s\n",
cursor,
(unsigned long long) realtime,
(unsigned long long) monotonic,
sd_id128_to_string(boot_id, sid));
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 &&
hasprefix(data, "_BOOT_ID="))
continue;
if (!utf8_is_printable(data, length)) {
const char *c;
uint64_t le64;
c = memchr(data, '=', length);
if (!c) {
log_error("Invalid field.");
return -EINVAL;
}
fwrite(data, c - (const char*) data, 1, 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);
} else
fwrite(data, length, 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) {
log_error("Failed to get realtime timestamp: %s", strerror(-r));
return r;
}
r = sd_journal_get_monotonic_usec(j, &monotonic, &boot_id);
if (r < 0) {
log_error("Failed to get monotonic timestamp: %s", strerror(-r));
return r;
}
r = sd_journal_get_cursor(j, &cursor);
if (r < 0) {
log_error("Failed to get cursor: %s", strerror(-r));
return r;
}
if (mode == OUTPUT_JSON_PRETTY)
fprintf(f,
"{\n"
"\t\"__CURSOR\" : \"%s\",\n"
"\t\"__REALTIME_TIMESTAMP\" : \"%llu\",\n"
"\t\"__MONOTONIC_TIMESTAMP\" : \"%llu\",\n"
"\t\"_BOOT_ID\" : \"%s\"",
cursor,
(unsigned long long) realtime,
(unsigned long long) monotonic,
sd_id128_to_string(boot_id, sid));
else {
if (mode == OUTPUT_JSON_SSE)
fputs("data: ", f);
fprintf(f,
"{ \"__CURSOR\" : \"%s\", "
"\"__REALTIME_TIMESTAMP\" : \"%llu\", "
"\"__MONOTONIC_TIMESTAMP\" : \"%llu\", "
"\"_BOOT_ID\" : \"%s\"",
cursor,
(unsigned long long) realtime,
(unsigned long long) monotonic,
sd_id128_to_string(boot_id, sid));
}
h = hashmap_new(string_hash_func, string_compare_func);
if (!h)
return -ENOMEM;
/* 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 = -ENOMEM;
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);
goto finish;
}
} else {
r = hashmap_update(h, n, UINT_TO_PTR(u + 1));
free(n);
if (r < 0)
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 = -ENOMEM;
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;
log_error("Failed to get data: %s", strerror(-r));
return r;
}
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_MONOTONIC] = output_short,
[OUTPUT_SHORT_ISO] = 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) {
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);
return ret;
}
static int show_journal(FILE *f,
sd_journal *j,
OutputMode mode,
unsigned n_columns,
usec_t not_before,
unsigned how_many,
OutputFlags flags) {
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)
goto finish;
r = sd_journal_previous_skip(j, how_many);
if (r < 0)
goto finish;
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(f, j, mode, 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)
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_t) -1);
if (r < 0)
goto finish;
}
finish:
return r;
}
int add_matches_for_unit(sd_journal *j, const char *unit) {
int r;
char *m1, *m2, *m3, *m4;
assert(j);
assert(unit);
m1 = strappenda("_SYSTEMD_UNIT=", unit);
m2 = strappenda("COREDUMP_UNIT=", unit);
m3 = strappenda("UNIT=", unit);
m4 = strappenda("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))
);
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 = strappenda("_SYSTEMD_USER_UNIT=", unit);
m2 = strappenda("USER_UNIT=", unit);
m3 = strappenda("COREDUMP_USER_UNIT=", unit);
m4 = strappenda("OBJECT_SYSTEMD_USER_UNIT=", unit);
sprintf(muid, "_UID=%lu", (unsigned long) 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))
);
return r;
}
int add_match_this_boot(sd_journal *j) {
char match[9+32+1] = "_BOOT_ID=";
sd_id128_t boot_id;
int r;
assert(j);
r = sd_id128_get_boot(&boot_id);
if (r < 0) {
log_error("Failed to get boot id: %s", strerror(-r));
return r;
}
sd_id128_to_string(boot_id, match + 9);
r = sd_journal_add_match(j, match, strlen(match));
if (r < 0) {
log_error("Failed to add match: %s", strerror(-r));
return r;
}
r = sd_journal_add_conjunction(j);
if (r < 0)
return r;
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,
bool system) {
_cleanup_journal_close_ sd_journal*j = NULL;
int r;
int jflags = SD_JOURNAL_LOCAL_ONLY | system * SD_JOURNAL_SYSTEM;
assert(mode >= 0);
assert(mode < _OUTPUT_MODE_MAX);
assert(unit);
if (how_many <= 0)
return 0;
r = sd_journal_open(&j, jflags);
if (r < 0)
return r;
r = add_match_this_boot(j);
if (r < 0)
return r;
if (system)
r = add_matches_for_unit(j, unit);
else
r = add_matches_for_user_unit(j, unit, uid);
if (r < 0)
return r;
if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) {
_cleanup_free_ char *filter;
filter = journal_make_match_string(j);
log_debug("Journal filter: %s", filter);
}
r = show_journal(f, j, mode, n_columns, not_before, how_many, flags);
if (r < 0)
return r;
return 0;
}
static const char *const output_mode_table[_OUTPUT_MODE_MAX] = {
[OUTPUT_SHORT] = "short",
[OUTPUT_SHORT_MONOTONIC] = "short-monotonic",
[OUTPUT_SHORT_ISO] = "short-iso",
[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);
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