chiark / gitweb /
journalctl: reset cached column count on SIGWINCH
[elogind.git] / src / journal / journalctl.c
index b0d8258dd213dda9428009baa3ccacf259a5301a..e491c2766230a326f183639a86c2ee0ba5a4fc17 100644 (file)
 #include <sys/poll.h>
 #include <time.h>
 #include <getopt.h>
+#include <signal.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 #include <linux/fs.h>
+#include <locale.h>
+#include <langinfo.h>
 
 #include <systemd/sd-journal.h>
 
@@ -58,7 +61,7 @@ static bool arg_no_pager = false;
 static int arg_lines = -1;
 static bool arg_no_tail = false;
 static bool arg_quiet = false;
-static bool arg_local = false;
+static bool arg_merge = false;
 static bool arg_this_boot = false;
 static const char *arg_directory = NULL;
 static int arg_priorities = 0xFF;
@@ -72,7 +75,8 @@ static enum {
         ACTION_NEW_ID128,
         ACTION_PRINT_HEADER,
         ACTION_SETUP_KEYS,
-        ACTION_VERIFY
+        ACTION_VERIFY,
+        ACTION_DISK_USAGE,
 } arg_action = ACTION_SHOW;
 
 static int help(void) {
@@ -84,18 +88,19 @@ static int help(void) {
                "     --no-pager          Do not pipe output into a pager\n"
                "  -a --all               Show all fields, including long and unprintable\n"
                "  -f --follow            Follow journal\n"
-               "  -n --lines=INTEGER     Journal entries to show\n"
+               "  -n --lines[=INTEGER]   Number of journal entries to show\n"
                "     --no-tail           Show all lines, even in follow mode\n"
                "  -o --output=STRING     Change journal output mode (short, short-monotonic,\n"
-               "                         verbose, export, json, cat)\n"
+               "                         verbose, export, json, json-pretty, cat)\n"
                "  -q --quiet             Don't show privilege warning\n"
-               "  -l --local             Only local entries\n"
+               "  -m --merge             Show entries from all available journals\n"
                "  -b --this-boot         Show data only from current boot\n"
                "  -D --directory=PATH    Show journal files from directory\n"
                "  -p --priority=RANGE    Show only messages within the specified priority range\n\n"
                "Commands:\n"
                "     --new-id128         Generate a new 128 Bit ID\n"
                "     --header            Show journal header information\n"
+               "     --disk-usage        Show total disk usage\n"
 #ifdef HAVE_GCRYPT
                "     --setup-keys        Generate new FSS key pair\n"
                "       --interval=TIME   Time interval for changing the FSS sealing key\n"
@@ -118,7 +123,8 @@ static int parse_argv(int argc, char *argv[]) {
                 ARG_SETUP_KEYS,
                 ARG_INTERVAL,
                 ARG_VERIFY,
-                ARG_VERIFY_KEY
+                ARG_VERIFY_KEY,
+                ARG_DISK_USAGE
         };
 
         static const struct option options[] = {
@@ -128,11 +134,11 @@ static int parse_argv(int argc, char *argv[]) {
                 { "follow",       no_argument,       NULL, 'f'              },
                 { "output",       required_argument, NULL, 'o'              },
                 { "all",          no_argument,       NULL, 'a'              },
-                { "lines",        required_argument, NULL, 'n'              },
+                { "lines",        optional_argument, NULL, 'n'              },
                 { "no-tail",      no_argument,       NULL, ARG_NO_TAIL      },
                 { "new-id128",    no_argument,       NULL, ARG_NEW_ID128    },
                 { "quiet",        no_argument,       NULL, 'q'              },
-                { "local",        no_argument,       NULL, 'l'              },
+                { "merge",        no_argument,       NULL, 'm'              },
                 { "this-boot",    no_argument,       NULL, 'b'              },
                 { "directory",    required_argument, NULL, 'D'              },
                 { "header",       no_argument,       NULL, ARG_HEADER       },
@@ -141,6 +147,7 @@ static int parse_argv(int argc, char *argv[]) {
                 { "interval",     required_argument, NULL, ARG_INTERVAL     },
                 { "verify",       no_argument,       NULL, ARG_VERIFY       },
                 { "verify-key",   required_argument, NULL, ARG_VERIFY_KEY   },
+                { "disk-usage",   no_argument,       NULL, ARG_DISK_USAGE   },
                 { NULL,           0,                 NULL, 0                }
         };
 
@@ -149,7 +156,7 @@ static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 0);
         assert(argv);
 
-        while ((c = getopt_long(argc, argv, "hfo:an:qlbD:p:", options, NULL)) >= 0) {
+        while ((c = getopt_long(argc, argv, "hfo:an::qmbD:p:", options, NULL)) >= 0) {
 
                 switch (c) {
 
@@ -169,10 +176,11 @@ static int parse_argv(int argc, char *argv[]) {
 
                 case 'f':
                         arg_follow = true;
+                        signal(SIGWINCH, columns_cache_reset);
                         break;
 
                 case 'o':
-                        arg_output =  output_mode_from_string(optarg);
+                        arg_output = output_mode_from_string(optarg);
                         if (arg_output < 0) {
                                 log_error("Unknown output '%s'.", optarg);
                                 return -EINVAL;
@@ -185,11 +193,15 @@ static int parse_argv(int argc, char *argv[]) {
                         break;
 
                 case 'n':
-                        r = safe_atoi(optarg, &arg_lines);
-                        if (r < 0 || arg_lines < 0) {
-                                log_error("Failed to parse lines '%s'", optarg);
-                                return -EINVAL;
-                        }
+                        if (optarg) {
+                                r = safe_atoi(optarg, &arg_lines);
+                                if (r < 0 || arg_lines < 0) {
+                                        log_error("Failed to parse lines '%s'", optarg);
+                                        return -EINVAL;
+                                }
+                        } else
+                                arg_lines = 10;
+
                         break;
 
                 case ARG_NO_TAIL:
@@ -204,8 +216,8 @@ static int parse_argv(int argc, char *argv[]) {
                         arg_quiet = true;
                         break;
 
-                case 'l':
-                        arg_local = true;
+                case 'm':
+                        arg_merge = true;
                         break;
 
                 case 'b':
@@ -224,6 +236,10 @@ static int parse_argv(int argc, char *argv[]) {
                         arg_action = ACTION_VERIFY;
                         break;
 
+                case ARG_DISK_USAGE:
+                        arg_action = ACTION_DISK_USAGE;
+                        break;
+
 #ifdef HAVE_GCRYPT
                 case ARG_SETUP_KEYS:
                         arg_action = ACTION_SETUP_KEYS;
@@ -233,6 +249,7 @@ static int parse_argv(int argc, char *argv[]) {
                 case ARG_VERIFY_KEY:
                         arg_action = ACTION_VERIFY;
                         arg_verify_key = optarg;
+                        arg_merge = false;
                         break;
 
                 case ARG_INTERVAL:
@@ -590,7 +607,8 @@ static int setup_keys(void) {
                 fprintf(stderr,
                         "\n"
                         "The new key pair has been generated. The " ANSI_HIGHLIGHT_ON "secret sealing key" ANSI_HIGHLIGHT_OFF " has been written to\n"
-                        "the following local file. It should not be used on multiple hosts.\n"
+                        "the following local file. This key file is automatically updated when the\n"
+                        "sealing key is advanced. It should not be used on multiple hosts.\n"
                         "\n"
                         "\t%s\n"
                         "\n"
@@ -619,13 +637,18 @@ static int setup_keys(void) {
 
                 if (hn) {
                         hostname_cleanup(hn);
-                        fprintf(stderr, "The keys have been generated for host %s (" SD_ID128_FORMAT_STR ").\n", hn, SD_ID128_FORMAT_VAL(machine));
+                        fprintf(stderr, "\nThe keys have been generated for host %s/" SD_ID128_FORMAT_STR ".\n", hn, SD_ID128_FORMAT_VAL(machine));
                 } else
-                        fprintf(stderr, "The keys have been generated for host " SD_ID128_FORMAT_STR ".\n", SD_ID128_FORMAT_VAL(machine));
+                        fprintf(stderr, "\nThe keys have been generated for host " SD_ID128_FORMAT_STR ".\n", SD_ID128_FORMAT_VAL(machine));
 
 #ifdef HAVE_QRENCODE
-                fputc('\n', stderr);
-                print_qr_code(stderr, seed, seed_size, n, arg_interval, hn, machine);
+                /* If this is not an UTF-8 system don't print any QR codes */
+                setlocale(LC_CTYPE, "");
+
+                if (streq_ptr(nl_langinfo(CODESET), "UTF-8")) {
+                        fputs("\nTo transfer the verification key to your phone please scan the QR code below:\n\n", stderr);
+                        print_qr_code(stderr, seed, seed_size, n, arg_interval, hn, machine);
+                }
 #endif
                 free(hn);
         }
@@ -657,13 +680,15 @@ static int verify(sd_journal *j) {
 
         assert(j);
 
+        log_show_color(true);
+
         HASHMAP_FOREACH(f, j->files, i) {
                 int k;
                 usec_t from, to, total;
 
 #ifdef HAVE_GCRYPT
                 if (!arg_verify_key && JOURNAL_HEADER_SEALED(f->header))
-                        log_warning("Journal file %s has sealing enabled but verification key has not been passed using --verify-key=.", f->path);
+                        log_notice("Journal file %s has sealing enabled but verification key has not been passed using --verify-key=.", f->path);
 #endif
 
                 k = journal_file_verify(f, arg_verify_key, &from, &to, &total, true);
@@ -677,11 +702,18 @@ static int verify(sd_journal *j) {
                         char a[FORMAT_TIMESTAMP_MAX], b[FORMAT_TIMESTAMP_MAX], c[FORMAT_TIMESPAN_MAX];
                         log_info("PASS: %s", f->path);
 
-                        if (arg_verify_key && JOURNAL_HEADER_SEALED(f->header))
-                                log_info("=> Validated from %s to %s, %s missing",
-                                         format_timestamp(a, sizeof(a), from),
-                                         format_timestamp(b, sizeof(b), to),
-                                         format_timespan(c, sizeof(c), total > to ? total - to : 0));
+                        if (arg_verify_key && JOURNAL_HEADER_SEALED(f->header)) {
+                                if (from > 0) {
+                                        log_info("=> Validated from %s to %s, final %s entries not sealed.",
+                                                 format_timestamp(a, sizeof(a), from),
+                                                 format_timestamp(b, sizeof(b), to),
+                                                 format_timespan(c, sizeof(c), total > to ? total - to : 0));
+                                } else if (total > 0)
+                                        log_info("=> No sealing yet, %s of entries not sealed.",
+                                                 format_timespan(c, sizeof(c), total));
+                                else
+                                        log_info("=> No sealing yet, no entries in file.");
+                        }
                 }
         }
 
@@ -717,7 +749,7 @@ int main(int argc, char *argv[]) {
         if (arg_directory)
                 r = sd_journal_open_directory(&j, arg_directory, 0);
         else
-                r = sd_journal_open(&j, arg_local ? SD_JOURNAL_LOCAL_ONLY : 0);
+                r = sd_journal_open(&j, arg_merge ? 0 : SD_JOURNAL_LOCAL_ONLY);
 
         if (r < 0) {
                 log_error("Failed to open journal: %s", strerror(-r));
@@ -735,9 +767,34 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
+        if (arg_action == ACTION_DISK_USAGE) {
+                uint64_t bytes;
+                char sbytes[FORMAT_BYTES_MAX];
+
+                r = sd_journal_get_usage(j, &bytes);
+                if (r < 0)
+                        goto finish;
+
+                printf("Journals take up %s on disk.\n", format_bytes(sbytes, sizeof(sbytes), bytes));
+                r = 0;
+                goto finish;
+        }
+
 #ifdef HAVE_ACL
+        if (access("/var/log/journal", F_OK) < 0 && geteuid() != 0 && in_group("adm") <= 0) {
+                log_error("Unprivileged users can't see messages unless persistent log storage is enabled. Users in the group 'adm' can always see messages.");
+                r = -EACCES;
+                goto finish;
+        }
+
         if (!arg_quiet && geteuid() != 0 && in_group("adm") <= 0)
-                log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this message off.");
+                log_warning("Showing user generated messages only. Users in the group 'adm' can see all messages. Pass -q to turn this notice off.");
+#else
+        if (geteuid() != 0 && in_group("adm") <= 0) {
+                log_error("No access to messages. Only users in the group 'adm' can see messages.");
+                r = -EACCES;
+                goto finish;
+        }
 #endif
 
         r = add_this_boot(j);
@@ -798,14 +855,8 @@ int main(int argc, char *argv[]) {
         on_tty();
         have_pager = !arg_no_pager && !arg_follow && pager_open();
 
-        if (arg_output == OUTPUT_JSON) {
-                fputc('[', stdout);
-                fflush(stdout);
-        }
-
         for (;;) {
                 for (;;) {
-                        sd_id128_t boot_id;
                         int flags =
                                 arg_show_all * OUTPUT_SHOW_ALL |
                                 have_pager * OUTPUT_FULL_WIDTH |
@@ -822,14 +873,18 @@ int main(int argc, char *argv[]) {
                         if (r == 0)
                                 break;
 
-                        r = sd_journal_get_monotonic_usec(j, NULL, &boot_id);
-                        if (r >= 0) {
-                                if (previous_boot_id_valid &&
-                                    !sd_id128_equal(boot_id, previous_boot_id))
-                                        printf(ANSI_HIGHLIGHT_ON "----- Reboot -----" ANSI_HIGHLIGHT_OFF "\n");
+                        if (!arg_merge) {
+                                sd_id128_t boot_id;
 
-                                previous_boot_id = boot_id;
-                                previous_boot_id_valid = true;
+                                r = sd_journal_get_monotonic_usec(j, NULL, &boot_id);
+                                if (r >= 0) {
+                                        if (previous_boot_id_valid &&
+                                            !sd_id128_equal(boot_id, previous_boot_id))
+                                                printf(ANSI_HIGHLIGHT_ON "----- Reboot -----" ANSI_HIGHLIGHT_OFF "\n");
+
+                                        previous_boot_id = boot_id;
+                                        previous_boot_id_valid = true;
+                                }
                         }
 
                         line ++;
@@ -851,9 +906,6 @@ int main(int argc, char *argv[]) {
                 }
         }
 
-        if (arg_output == OUTPUT_JSON)
-                fputs("\n]\n", stdout);
-
 finish:
         if (j)
                 sd_journal_close(j);