From b4f10a5e8956d26f0bc6b9aef12846b57caee08b Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 8 Jul 2010 21:34:51 +0200
Subject: install: various improvements

Rename --start to --realize, to make things less confusing when doing
"systemctl stop --realize foo.service".

Introduce --realize=reload.

Don't talk to systemd when run within a chroot, or when systemd isn't
running.
---
 src/util.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src/util.c')

diff --git a/src/util.c b/src/util.c
index 2e5827f32d..7f5fa05dca 100644
--- a/src/util.c
+++ b/src/util.c
@@ -2825,6 +2825,25 @@ int columns(void) {
         return parsed_columns;
 }
 
+int running_in_chroot(void) {
+        struct stat a, b;
+
+        zero(a);
+        zero(b);
+
+        /* Only works as root */
+
+        if (stat("/proc/1/root", &a) < 0)
+                return -errno;
+
+        if (stat("/", &b) < 0)
+                return -errno;
+
+        return
+                a.st_dev != b.st_dev ||
+                a.st_ino != b.st_ino;
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",
-- 
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