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-rw-r--r--src/shared/logs-show.c203
1 files changed, 122 insertions, 81 deletions
diff --git a/src/shared/logs-show.c b/src/shared/logs-show.c
index 0626d80b19..afc3dcd219 100644
--- a/src/shared/logs-show.c
+++ b/src/shared/logs-show.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
@@ -48,6 +49,7 @@
#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"
@@ -79,37 +81,76 @@ static int print_catalog(FILE *f, sd_journal *j) {
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;
+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);
- fl = strlen(field);
- if (length < fl)
+ if (length < field_len)
return 0;
- if (memcmp(data, field, fl))
+ if (memcmp(data, field, field_len))
return 0;
- nl = length - fl;
+ nl = length - field_len;
- buf = newdup_suffix0(char, (const char*) data + fl, nl);
+ buf = newdup_suffix0(char, (const char*) data + field_len, nl);
if (!buf)
return log_oom();
free(*target);
*target = buf;
- if (target_size)
- *target_size = nl;
+ 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);
@@ -327,7 +368,8 @@ static int output_short(
sd_journal *j,
OutputMode mode,
unsigned n_columns,
- OutputFlags flags) {
+ OutputFlags flags,
+ Set *output_fields) {
int r;
const void *data;
@@ -337,6 +379,17 @@ static int output_short(
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;
+ 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),
+ };
assert(f);
assert(j);
@@ -351,55 +404,7 @@ static int output_short(
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);
+ r = parse_fieldv(data, length, fields, ELEMENTSOF(fields));
if (r < 0)
return r;
}
@@ -477,7 +482,8 @@ static int output_verbose(
sd_journal *j,
OutputMode mode,
unsigned n_columns,
- OutputFlags flags) {
+ OutputFlags flags,
+ Set *output_fields) {
const void *data;
size_t length;
@@ -500,7 +506,9 @@ static int output_verbose(
else {
_cleanup_free_ char *value = NULL;
- r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=", &value, NULL);
+ r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=",
+ STRLEN("_SOURCE_REALTIME_TIMESTAMP="), &value,
+ NULL);
if (r < 0)
return r;
assert(r > 0);
@@ -538,6 +546,12 @@ static int output_verbose(
}
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;
@@ -575,7 +589,8 @@ static int output_export(
sd_journal *j,
OutputMode mode,
unsigned n_columns,
- OutputFlags flags) {
+ OutputFlags flags,
+ Set *output_fields) {
sd_id128_t boot_id;
char sid[33];
@@ -612,6 +627,7 @@ static int output_export(
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 */
@@ -619,18 +635,23 @@ static int output_export(
startswith(data, "_BOOT_ID="))
continue;
+ c = memchr(data, '=', length);
+ if (!c) {
+ log_error("Invalid field.");
+ return -EINVAL;
+ }
+
+ 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 {
- 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);
@@ -706,7 +727,8 @@ static int output_json(
sd_journal *j,
OutputMode mode,
unsigned n_columns,
- OutputFlags flags) {
+ OutputFlags flags,
+ Set *output_fields) {
uint64_t realtime, monotonic;
_cleanup_free_ char *cursor = NULL;
@@ -825,13 +847,6 @@ static int output_json(
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);
@@ -840,6 +855,18 @@ static int output_json(
goto finish;
}
+ if (output_fields && !set_get(output_fields, n)) {
+ free(n);
+ continue;
+ }
+
+ if (separator) {
+ if (mode == OUTPUT_JSON_PRETTY)
+ fputs(",\n\t", f);
+ else
+ fputs(", ", f);
+ }
+
u = PTR_TO_UINT(hashmap_get2(h, n, (void**) &kk));
if (u == 0) {
/* We already printed this, let's jump to the next */
@@ -924,7 +951,8 @@ static int output_cat(
sd_journal *j,
OutputMode mode,
unsigned n_columns,
- OutputFlags flags) {
+ OutputFlags flags,
+ Set *output_fields) {
const void *data;
size_t l;
@@ -957,7 +985,8 @@ static int (*output_funcs[_OUTPUT_MODE_MAX])(
sd_journal*j,
OutputMode mode,
unsigned n_columns,
- OutputFlags flags) = {
+ OutputFlags flags,
+ Set *output_fields) = {
[OUTPUT_SHORT] = output_short,
[OUTPUT_SHORT_ISO] = output_short,
@@ -980,16 +1009,28 @@ int output_journal(
OutputMode mode,
unsigned n_columns,
OutputFlags flags,
+ char **output_fields,
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();
- ret = output_funcs[mode](f, j, mode, n_columns, flags);
+ 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);
if (ellipsized && ret > 0)
*ellipsized = true;
@@ -1071,7 +1112,7 @@ static int show_journal(FILE *f,
line++;
maybe_print_begin_newline(f, &flags);
- r = output_journal(f, j, mode, n_columns, flags, ellipsized);
+ r = output_journal(f, j, mode, n_columns, flags, NULL, ellipsized);
if (r < 0)
return r;
}
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