journalctl: hightlight log lines by priority

[elogind.git] / src / journal / journalctl.c

diff --git a/src/journal/journalctl.c b/src/journal/journalctl.c
index 4c975d3e7c49c3b6c1bcea5df70918f1e86b23c5..abcfabe75d4e56d02b7f2d1b1a72c85081195638 100644 (file)
--- a/src/journal/journalctl.c
+++ b/src/journal/journalctl.c
@@ -40,6 +40,7 @@
 #include "pager.h"
 #include "logs-show.h"
 #include "strv.h"
+#include "journal-internal.h"
 
 static OutputMode arg_output = OUTPUT_SHORT;
 static bool arg_follow = false;
@@ -48,6 +49,7 @@ static bool arg_no_pager = false;
 static int arg_lines = -1;
 static bool arg_no_tail = false;
 static bool arg_new_id128 = false;
+static bool arg_print_header = false;
 static bool arg_quiet = false;
 static bool arg_local = false;
 static bool arg_this_boot = false;
@@ -70,6 +72,7 @@ static int help(void) {
                "  -l --local          Only local entries\n"
                "  -b --this-boot      Show data only from current boot\n"
                "  -D --directory=PATH Show journal files from directory\n"
+               "     --header         Show journal header information\n"
                "     --new-id128      Generate a new 128 Bit id\n",
                program_invocation_short_name);
 
@@ -82,7 +85,8 @@ static int parse_argv(int argc, char *argv[]) {
                 ARG_VERSION = 0x100,
                 ARG_NO_PAGER,
                 ARG_NO_TAIL,
-                ARG_NEW_ID128
+                ARG_NEW_ID128,
+                ARG_HEADER
         };
 
         static const struct option options[] = {
@@ -99,6 +103,7 @@ static int parse_argv(int argc, char *argv[]) {
                 { "local",     no_argument,       NULL, 'l'           },
                 { "this-boot", no_argument,       NULL, 'b'           },
                 { "directory", required_argument, NULL, 'D'           },
+                { "header",    no_argument,       NULL, ARG_HEADER    },
                 { NULL,        0,                 NULL, 0             }
         };
 
@@ -174,6 +179,10 @@ static int parse_argv(int argc, char *argv[]) {
                         arg_directory = optarg;
                         break;
 
+                case ARG_HEADER:
+                        arg_print_header = true;
+                        break;
+
                 case '?':
                         return -EINVAL;
 
@@ -189,6 +198,21 @@ static int parse_argv(int argc, char *argv[]) {
         return 1;
 }
 
+static bool on_tty(void) {
+        static int t = -1;
+
+        /* Note that this is invoked relatively early, before we start
+         * the pager. That means the value we return reflects whether
+         * we originally were started on a tty, not if we currently
+         * are. But this is intended, since we want colour and so on
+         * when run in our own pager. */
+
+        if (_unlikely_(t < 0))
+                t = isatty(STDOUT_FILENO) > 0;
+
+        return t;
+}
+
 static int generate_new_id128(void) {
         sd_id128_t id;
         int r;
@@ -225,7 +249,9 @@ static int add_matches(sd_journal *j, char **args) {
 
         STRV_FOREACH(i, args) {
 
-                if (path_is_absolute(*i)) {
+                if (streq(*i, "+"))
+                        r = sd_journal_add_disjunction(j);
+                else if (path_is_absolute(*i)) {
                         char *p;
                         const char *path;
                         struct stat st;
@@ -245,11 +271,10 @@ static int add_matches(sd_journal *j, char **args) {
                                 t = strappend("_EXE=", path);
                                 if (!t) {
                                         free(p);
-                                        log_error("Out of memory");
-                                        return -ENOMEM;
+                                        return log_oom();
                                 }
 
-                                r = sd_journal_add_match(j, t, strlen(t));
+                                r = sd_journal_add_match(j, t, 0);
                                 free(t);
                         } else {
                                 free(p);
@@ -259,10 +284,10 @@ static int add_matches(sd_journal *j, char **args) {
 
                         free(p);
                 } else
-                        r = sd_journal_add_match(j, *i, strlen(*i));
+                        r = sd_journal_add_match(j, *i, 0);
 
                 if (r < 0) {
-                        log_error("Failed to add match: %s", strerror(-r));
+                        log_error("Failed to add match '%s': %s", *i, strerror(-r));
                         return r;
                 }
         }
@@ -299,6 +324,9 @@ int main(int argc, char *argv[]) {
         sd_journal *j = NULL;
         unsigned line = 0;
         bool need_seek = false;
+        sd_id128_t previous_boot_id;
+        bool previous_boot_id_valid = false;
+        bool have_pager;
 
         log_parse_environment();
         log_open();
@@ -327,6 +355,12 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
+        if (arg_print_header) {
+                journal_print_header(j);
+                r = 0;
+                goto finish;
+        }
+
         r = add_this_boot(j);
         if (r < 0)
                 goto finish;
@@ -378,10 +412,8 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
-        if (!arg_no_pager && !arg_follow) {
-                columns();
-                pager_open();
-        }
+        on_tty();
+        have_pager = !arg_no_pager && !arg_follow && pager_open();
 
         if (arg_output == OUTPUT_JSON) {
                 fputc('[', stdout);
@@ -390,6 +422,12 @@ int main(int argc, char *argv[]) {
 
         for (;;) {
                 for (;;) {
+                        sd_id128_t boot_id;
+                        int flags =
+                                arg_show_all * OUTPUT_SHOW_ALL |
+                                have_pager * OUTPUT_FULL_WIDTH |
+                                on_tty() * OUTPUT_COLOR;
+
                         if (need_seek) {
                                 r = sd_journal_next(j);
                                 if (r < 0) {
@@ -401,9 +439,19 @@ 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");
+
+                                previous_boot_id = boot_id;
+                                previous_boot_id_valid = true;
+                        }
+
                         line ++;
 
-                        r = output_journal(j, arg_output, line, 0, arg_show_all);
+                        r = output_journal(j, arg_output, line, 0, flags);
                         if (r < 0)
                                 goto finish;