| /*-*- 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" |
| |
| #define PRINT_THRESHOLD 128 |
| |
| 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(bool show_all, char *p, size_t l) { |
| if (show_all) |
| return true; |
| |
| if (l > PRINT_THRESHOLD) |
| return false; |
| |
| if (!utf8_is_printable_n(p, l)) |
| return false; |
| |
| return true; |
| } |
| |
| static int output_short(sd_journal *j, unsigned line, unsigned n_columns, |
| OutputFlags flags) { |
| int r; |
| const void *data; |
| size_t length; |
| size_t n = 0; |
| 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; |
| const char *color_on = "", *color_off = ""; |
| |
| assert(j); |
| |
| SD_JOURNAL_FOREACH_DATA(j, data, length) { |
| |
| r = parse_field(data, length, "PRIORITY=", &priority, &priority_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "_HOSTNAME=", &hostname, &hostname_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "SYSLOG_IDENTIFIER=", &identifier, &identifier_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "_COMM=", &comm, &comm_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "_PID=", &pid, &pid_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "SYSLOG_PID=", &fake_pid, &fake_pid_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "_SOURCE_REALTIME_TIMESTAMP=", &realtime, &realtime_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "_SOURCE_MONOTONIC_TIMESTAMP=", &monotonic, &monotonic_len); |
| if (r < 0) |
| goto finish; |
| else if (r > 0) |
| continue; |
| |
| r = parse_field(data, length, "MESSAGE=", &message, &message_len); |
| if (r < 0) |
| goto finish; |
| } |
| |
| if (!message) { |
| r = 0; |
| goto finish; |
| } |
| |
| if (priority_len == 1 && *priority >= '0' && *priority <= '7') |
| p = *priority - '0'; |
| |
| if (flags & OUTPUT_MONOTONIC_MODE) { |
| 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: %s", strerror(-r)); |
| goto finish; |
| } |
| |
| printf("[%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: %s", strerror(-r)); |
| goto finish; |
| } |
| |
| t = (time_t) (x / USEC_PER_SEC); |
| if (strftime(buf, sizeof(buf), "%b %d %H:%M:%S", localtime_r(&t, &tm)) <= 0) { |
| log_error("Failed to format time."); |
| goto finish; |
| } |
| |
| fputs(buf, stdout); |
| n += strlen(buf); |
| } |
| |
| if (hostname && shall_print(flags & OUTPUT_SHOW_ALL, |
| hostname, hostname_len)) { |
| printf(" %.*s", (int) hostname_len, hostname); |
| n += hostname_len + 1; |
| } |
| |
| if (identifier && shall_print(flags & OUTPUT_SHOW_ALL, |
| identifier, identifier_len)) { |
| printf(" %.*s", (int) identifier_len, identifier); |
| n += identifier_len + 1; |
| } else if (comm && shall_print(flags & OUTPUT_SHOW_ALL, |
| comm, comm_len)) { |
| printf(" %.*s", (int) comm_len, comm); |
| n += comm_len + 1; |
| } else |
| putchar(' '); |
| |
| if (pid && shall_print(flags & OUTPUT_SHOW_ALL, pid, pid_len)) { |
| printf("[%.*s]", (int) pid_len, pid); |
| n += pid_len + 2; |
| } else if (fake_pid && shall_print(flags & OUTPUT_SHOW_ALL, |
| fake_pid, fake_pid_len)) { |
| printf("[%.*s]", (int) fake_pid_len, fake_pid); |
| n += fake_pid_len + 2; |
| } |
| |
| if (flags & OUTPUT_COLOR) { |
| if (p <= LOG_ERR) { |
| color_on = ANSI_HIGHLIGHT_RED_ON; |
| color_off = ANSI_HIGHLIGHT_OFF; |
| } else if (p <= LOG_NOTICE) { |
| color_on = ANSI_HIGHLIGHT_ON; |
| color_off = ANSI_HIGHLIGHT_OFF; |
| } |
| } |
| |
| if (flags & OUTPUT_SHOW_ALL) |
| printf(": %s%.*s%s\n", color_on, (int) message_len, message, color_off); |
| else if (!utf8_is_printable_n(message, message_len)) { |
| char bytes[FORMAT_BYTES_MAX]; |
| printf(": [%s blob data]\n", format_bytes(bytes, sizeof(bytes), message_len)); |
| } else if ((flags & OUTPUT_FULL_WIDTH) || |
| (message_len + n + 1 < n_columns)) |
| printf(": %s%.*s%s\n", color_on, (int) message_len, message, color_off); |
| else if (n < n_columns && n_columns - n - 2 >= 3) { |
| char *e; |
| |
| e = ellipsize_mem(message, message_len, n_columns - n - 2, 90); |
| |
| if (!e) |
| printf(": %s%.*s%s\n", color_on, (int) message_len, message, color_off); |
| else |
| printf(": %s%s%s\n", color_on, e, color_off); |
| |
| free(e); |
| } else |
| fputs("\n", stdout); |
| |
| r = 0; |
| |
| finish: |
| free(hostname); |
| free(identifier); |
| free(comm); |
| free(pid); |
| free(fake_pid); |
| free(message); |
| free(monotonic); |
| free(realtime); |
| |
| return r; |
| } |
| |
| static int output_short_realtime(sd_journal *j, unsigned line, |
| unsigned n_columns, OutputFlags flags) { |
| return output_short(j, line, n_columns, flags & ~OUTPUT_MONOTONIC_MODE); |
| } |
| |
| static int output_short_monotonic(sd_journal *j, unsigned line, |
| unsigned n_columns, OutputFlags flags) { |
| return output_short(j, line, n_columns, flags | OUTPUT_MONOTONIC_MODE); |
| } |
| |
| static int output_verbose(sd_journal *j, unsigned line, |
| unsigned n_columns, OutputFlags flags) { |
| 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 (!(flags & OUTPUT_SHOW_ALL) && (length > PRINT_THRESHOLD || |
| !utf8_is_printable_n(data, length))) { |
| const char *c; |
| char bytes[FORMAT_BYTES_MAX]; |
| |
| c = memchr(data, '=', length); |
| if (!c) { |
| log_error("Invalid field."); |
| return -EINVAL; |
| } |
| |
| printf("\t%.*s=[%s blob data]\n", |
| (int) (c - (const char*) data), |
| (const char*) data, |
| format_bytes(bytes, sizeof(bytes), length - (c - (const char *) data) - 1)); |
| } else |
| printf("\t%.*s\n", (int) length, (const char*) data); |
| } |
| |
| return 0; |
| } |
| |
| static int output_export(sd_journal *j, unsigned line, |
| unsigned n_columns, OutputFlags flags) { |
| 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_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)); |
| |
| free(cursor); |
| |
| SD_JOURNAL_FOREACH_DATA(j, data, length) { |
| |
| /* 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; |
| |
| if (!utf8_is_printable_n(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 (!utf8_is_printable_n(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, |
| unsigned n_columns, OutputFlags flags) { |
| 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_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)); |
| |
| free(cursor); |
| |
| SD_JOURNAL_FOREACH_DATA(j, data, length) { |
| const char *c; |
| |
| /* 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; |
| |
| 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_cat(sd_journal *j, unsigned line, |
| unsigned n_columns, OutputFlags flags) { |
| const void *data; |
| size_t l; |
| int r; |
| |
| assert(j); |
| |
| r = sd_journal_get_data(j, "MESSAGE", &data, &l); |
| if (r < 0) { |
| log_error("Failed to get data: %s", strerror(-r)); |
| return r; |
| } |
| |
| assert(l >= 8); |
| |
| fwrite((const char*) data + 8, 1, l - 8, stdout); |
| putchar('\n'); |
| |
| return 0; |
| } |
| |
| static int (*output_funcs[_OUTPUT_MODE_MAX])(sd_journal*j, unsigned line, |
| unsigned n_columns, OutputFlags flags) = { |
| [OUTPUT_SHORT] = output_short_realtime, |
| [OUTPUT_SHORT_MONOTONIC] = output_short_monotonic, |
| [OUTPUT_VERBOSE] = output_verbose, |
| [OUTPUT_EXPORT] = output_export, |
| [OUTPUT_JSON] = output_json, |
| [OUTPUT_CAT] = output_cat |
| }; |
| |
| int output_journal(sd_journal *j, OutputMode mode, unsigned line, |
| unsigned n_columns, OutputFlags flags) { |
| assert(mode >= 0); |
| assert(mode < _OUTPUT_MODE_MAX); |
| |
| if (n_columns <= 0) |
| n_columns = columns(); |
| |
| return output_funcs[mode](j, line, n_columns, flags); |
| } |
| |
| int show_journal_by_unit( |
| const char *unit, |
| OutputMode mode, |
| unsigned n_columns, |
| usec_t not_before, |
| unsigned how_many, |
| OutputFlags flags) { |
| |
| char *m = NULL; |
| sd_journal *j = NULL; |
| int r; |
| unsigned line = 0; |
| bool need_seek = false; |
| int warn_cutoff = flags & OUTPUT_WARN_CUTOFF; |
| |
| assert(mode >= 0); |
| assert(mode < _OUTPUT_MODE_MAX); |
| assert(unit); |
| |
| if (!endswith(unit, ".service") && |
| !endswith(unit, ".socket") && |
| !endswith(unit, ".mount") && |
| !endswith(unit, ".swap")) |
| return 0; |
| |
| if (how_many <= 0) |
| return 0; |
| |
| if (asprintf(&m, "_SYSTEMD_UNIT=%s", unit) < 0) { |
| r = -ENOMEM; |
| goto finish; |
| } |
| |
| r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM_ONLY); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_journal_add_match(j, m, strlen(m)); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_journal_seek_tail(j); |
| if (r < 0) |
| goto finish; |
| |
| r = sd_journal_previous_skip(j, how_many); |
| if (r < 0) |
| goto finish; |
| |
| if (mode == OUTPUT_JSON) { |
| fputc('[', stdout); |
| fflush(stdout); |
| } |
| |
| 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(j, mode, line, 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) |
| printf("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; |
| |
| } |
| |
| if (mode == OUTPUT_JSON) |
| fputs("\n]\n", stdout); |
| |
| finish: |
| if (m) |
| free(m); |
| |
| if (j) |
| sd_journal_close(j); |
| |
| return r; |
| } |
| |
| static const char *const output_mode_table[_OUTPUT_MODE_MAX] = { |
| [OUTPUT_SHORT] = "short", |
| [OUTPUT_SHORT_MONOTONIC] = "short-monotonic", |
| [OUTPUT_VERBOSE] = "verbose", |
| [OUTPUT_EXPORT] = "export", |
| [OUTPUT_JSON] = "json", |
| [OUTPUT_CAT] = "cat" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(output_mode, OutputMode); |