#include "util.h"
#include "build.h"
#include "pager.h"
+#include "logs-show.h"
-#define PRINT_THRESHOLD 128
-
-static enum {
- OUTPUT_SHORT,
- OUTPUT_VERBOSE,
- OUTPUT_EXPORT,
- OUTPUT_JSON,
- _OUTPUT_MAX
-} arg_output = OUTPUT_SHORT;
+static output_mode arg_output = OUTPUT_SHORT;
static bool arg_follow = false;
static bool arg_show_all = false;
static bool arg_no_pager = false;
-
-static bool contains_unprintable(const void *p, size_t l) {
- const char *j;
-
- for (j = p; j < (const char *) p + l; j++)
- if (*j < ' ' || *j >= 127)
- return true;
-
- return false;
-}
-
-static int output_short(sd_journal *j, unsigned line) {
- int r;
- uint64_t realtime;
- time_t t;
- struct tm tm;
- char buf[64];
- const void *data;
- size_t length;
- size_t n = 0;
-
- assert(j);
-
- r = sd_journal_get_realtime_usec(j, &realtime);
- if (r < 0) {
- log_error("Failed to get realtime: %s", strerror(-r));
- return r;
- }
-
- t = (time_t) (realtime / USEC_PER_SEC);
- if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_r(&t, &tm)) <= 0) {
- log_error("Failed to format time.");
- return -EINVAL;
- }
-
- fputs(buf, stdout);
- n += strlen(buf);
-
- if (sd_journal_get_data(j, "_HOSTNAME", &data, &length) >= 0 &&
- (arg_show_all || (!contains_unprintable(data, length) &&
- length < PRINT_THRESHOLD))) {
- printf(" %.*s", (int) length - 10, ((const char*) data) + 10);
- n += length - 10 + 1;
- }
-
- if (sd_journal_get_data(j, "MESSAGE", &data, &length) >= 0) {
- if (arg_show_all)
- printf(" %.*s", (int) length - 8, ((const char*) data) + 8);
- else if (contains_unprintable(data, length))
- fputs(" [blob data]", stdout);
- else if (length - 8 + n < columns())
- printf(" %.*s", (int) length - 8, ((const char*) data) + 8);
- else if (n < columns()) {
- char *e;
-
- e = ellipsize_mem((const char *) data + 8, length - 8, columns() - n - 2, 90);
-
- if (!e)
- printf(" %.*s", (int) length - 8, ((const char*) data) + 8);
- else
- printf(" %s", e);
-
- free(e);
- }
- }
-
- fputc('\n', stdout);
-
- return 0;
-}
-
-static int output_verbose(sd_journal *j, unsigned line) {
- const void *data;
- size_t length;
- char *cursor;
- uint64_t realtime;
- char ts[FORMAT_TIMESTAMP_MAX];
- int r;
-
- assert(j);
-
- 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_cursor(j, &cursor);
- if (r < 0) {
- log_error("Failed to get cursor: %s", strerror(-r));
- return r;
- }
-
- printf("%s [%s]\n",
- format_timestamp(ts, sizeof(ts), realtime),
- cursor);
-
- free(cursor);
-
- SD_JOURNAL_FOREACH_DATA(j, data, length) {
- if (!arg_show_all && (length > PRINT_THRESHOLD ||
- contains_unprintable(data, length))) {
- const char *c;
-
- c = memchr(data, '=', length);
- if (!c) {
- log_error("Invalid field.");
- return -EINVAL;
- }
-
- printf("\t%.*s=[blob data]\n",
- (int) (c - (const char*) data),
- (const char*) data);
- } else
- printf("\t%.*s\n", (int) length, (const char*) data);
- }
-
- return 0;
-}
-
-static int output_export(sd_journal *j, unsigned line) {
- sd_id128_t boot_id;
- char sid[33];
- int r;
- usec_t realtime, monotonic;
- char *cursor;
- const void *data;
- size_t length;
-
- assert(j);
-
- 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;
- }
-
- printf(".cursor=%s\n"
- ".realtime=%llu\n"
- ".monotonic=%llu\n"
- ".boot_id=%s\n",
- cursor,
- (unsigned long long) realtime,
- (unsigned long long) monotonic,
- sd_id128_to_string(boot_id, sid));
-
- free(cursor);
-
- SD_JOURNAL_FOREACH_DATA(j, data, length) {
-
- if (contains_unprintable(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, stdout);
- fputc('\n', stdout);
- le64 = htole64(length - (c - (const char*) data) - 1);
- fwrite(&le64, sizeof(le64), 1, stdout);
- fwrite(c + 1, length - (c - (const char*) data) - 1, 1, stdout);
- } else
- fwrite(data, length, 1, stdout);
-
- fputc('\n', stdout);
- }
-
- fputc('\n', stdout);
-
- return 0;
-}
-
-static void json_escape(const char* p, size_t l) {
-
- if (contains_unprintable(p, l)) {
- bool not_first = false;
-
- fputs("[ ", stdout);
-
- while (l > 0) {
- if (not_first)
- printf(", %u", (uint8_t) *p);
- else {
- not_first = true;
- printf("%u", (uint8_t) *p);
- }
-
- p++;
- l--;
- }
-
- fputs(" ]", stdout);
- } else {
- fputc('\"', stdout);
-
- while (l > 0) {
- if (*p == '"' || *p == '\\') {
- fputc('\\', stdout);
- fputc(*p, stdout);
- } else
- fputc(*p, stdout);
-
- p++;
- l--;
- }
-
- fputc('\"', stdout);
- }
-}
-
-static int output_json(sd_journal *j, unsigned line) {
- uint64_t realtime, monotonic;
- char *cursor;
- const void *data;
- size_t length;
- sd_id128_t boot_id;
- char sid[33];
- int r;
-
- assert(j);
-
- 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 (line == 1)
- fputc('\n', stdout);
- else
- fputs(",\n", stdout);
-
- printf("{\n"
- "\t\".cursor\" : \"%s\",\n"
- "\t\".realtime\" : %llu,\n"
- "\t\".monotonic\" : %llu,\n"
- "\t\".boot_id\" : \"%s\"",
- cursor,
- (unsigned long long) realtime,
- (unsigned long long) monotonic,
- sd_id128_to_string(boot_id, sid));
-
- free(cursor);
-
- SD_JOURNAL_FOREACH_DATA(j, data, length) {
- const char *c;
-
- c = memchr(data, '=', length);
- if (!c) {
- log_error("Invalid field.");
- return -EINVAL;
- }
-
- fputs(",\n\t", stdout);
- json_escape(data, c - (const char*) data);
- fputs(" : ", stdout);
- json_escape(c + 1, length - (c - (const char*) data) - 1);
- }
-
- fputs("\n}", stdout);
- fflush(stdout);
-
- return 0;
-}
-
-static int (*output_funcs[_OUTPUT_MAX])(sd_journal*j, unsigned line) = {
- [OUTPUT_SHORT] = output_short,
- [OUTPUT_VERBOSE] = output_verbose,
- [OUTPUT_EXPORT] = output_export,
- [OUTPUT_JSON] = output_json
-};
+static int arg_lines = -1;
static int help(void) {
" --no-pager Do not pipe output into a pager\n"
" -a --all Show all properties, including long and unprintable\n"
" -f --follow Follow journal\n"
+ " -n --lines=INTEGER Lines to show\n"
" -o --output=STRING Change output mode (short, verbose, export, json)\n",
program_invocation_short_name);
{ "follow", no_argument, NULL, 'f' },
{ "output", required_argument, NULL, 'o' },
{ "all", no_argument, NULL, 'a' },
+ { "lines", required_argument, NULL, 'n' },
{ NULL, 0, NULL, 0 }
};
- int c;
+ int c, r;
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "hfo:a", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "hfo:an:", options, NULL)) >= 0) {
switch (c) {
arg_show_all = true;
break;
+ case 'n':
+ r = safe_atoi(optarg, &arg_lines);
+ if (r < 0) {
+ log_error("Failed to parse lines '%s'", optarg);
+ return -EINVAL;
+ }
+ break;
+
case '?':
return -EINVAL;
goto finish;
}
- r = sd_journal_seek_head(j);
- if (r < 0) {
- log_error("Failed to seek to head: %s", strerror(-r));
- goto finish;
+ if (arg_lines >= 0) {
+ r = sd_journal_seek_tail(j);
+ if (r < 0) {
+ log_error("Failed to seek to tail: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = sd_journal_previous_skip(j, arg_lines);
+ if (r < 0) {
+ log_error("Failed to iterate through journal: %s", strerror(-r));
+ goto finish;
+ }
+ } else {
+ r = sd_journal_seek_head(j);
+ if (r < 0) {
+ log_error("Failed to seek to head: %s", strerror(-r));
+ goto finish;
+ }
}
if (!arg_no_pager && !arg_follow) {
line ++;
- r = output_funcs[arg_output](j, line);
+ r = output_journal(j, arg_output, line, arg_show_all);
if (r < 0)
goto finish;
}
~ianmdlvl / elogind.git / blobdiff