Merge pull request #3987 from keszybz/console-color-setup

Rework console color setup

src/basic/terminal-util.c

@@ -39,6 +39,7 @@
 #include <unistd.h>
 
 #include "alloc-util.h"
+#include "env-util.h"
 #include "fd-util.h"
 #include "fileio.h"
 #include "fs-util.h"
@@ -1191,12 +1192,9 @@ int open_terminal_in_namespace(pid_t pid, const char *name, int mode) {
         return receive_one_fd(pair[0], 0);
 }
 
-bool terminal_is_dumb(void) {
+static bool getenv_terminal_is_dumb(void) {
         const char *e;
 
-        if (!on_tty())
-                return true;
-
         e = getenv("TERM");
         if (!e)
                 return true;
@@ -1204,15 +1202,25 @@ bool terminal_is_dumb(void) {
         return streq(e, "dumb");
 }
 
+bool terminal_is_dumb(void) {
+        if (!on_tty())
+                return true;
+
+        return getenv_terminal_is_dumb();
+}
+
 bool colors_enabled(void) {
         static int enabled = -1;
 
         if (_unlikely_(enabled < 0)) {
-                const char *colors;
+                int val;
 
-                colors = getenv("SYSTEMD_COLORS");
-                if (colors)
-                        enabled = parse_boolean(colors) != 0;
+                val = getenv_bool("SYSTEMD_COLORS");
+                if (val >= 0)
+                        enabled = val;
+                else if (getpid() == 1)
+                        /* PID1 outputs to the console without holding it open all the time */
+                        enabled = !getenv_terminal_is_dumb();
                 else
                         enabled = !terminal_is_dumb();
         }

src/core/main.c

@@ -1505,7 +1505,8 @@ int main(int argc, char *argv[]) {
         if (getpid() == 1) {
                 /* Don't limit the core dump size, so that coredump handlers such as systemd-coredump (which honour the limit)
                  * will process core dumps for system services by default. */
-                (void) setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY));
+                if (setrlimit(RLIMIT_CORE, &RLIMIT_MAKE_CONST(RLIM_INFINITY)) < 0)
+                        log_warning_errno(errno, "Failed to set RLIMIT_CORE: %m");
 
                 /* But at the same time, turn off the core_pattern logic by default, so that no coredumps are stored
                  * until the systemd-coredump tool is enabled via sysctl. */
@@ -2013,9 +2014,6 @@ finish:
                                 log_error_errno(r, "Failed to switch root, trying to continue: %m");
                 }
 
-                /* Reopen the console */
-                (void) make_console_stdio();
-
                 args_size = MAX(6, argc+1);
                 args = newa(const char*, args_size);
 
@@ -2063,6 +2061,9 @@ finish:
                 arg_serialization = safe_fclose(arg_serialization);
                 fds = fdset_free(fds);
 
+                /* Reopen the console */
+                (void) make_console_stdio();
+
                 for (j = 1, i = 1; j < (unsigned) argc; j++)
                         args[i++] = argv[j];
                 args[i++] = NULL;