dev-setup: allow a path prefix for use in chroots

With this adjustment, we can reuse this code elsewhere, such as in
nspawn.

2 files changed, 15 insertions, 8 deletions

diff --git a/src/shared/dev-setup.c b/src/shared/dev-setup.c
index 0b3d648acb..759ecd799f 100644
--- a/src/shared/dev-setup.c
+++ b/src/shared/dev-setup.c
@@ -50,7 +50,7 @@ static int symlink_and_label(const char *old_path, const char *new_path) {
         return r;
 }
 
-void dev_setup(void) {
+void dev_setup(const char *pathprefix) {
         const char *j, *k;
 
         static const char symlinks[] =
@@ -60,6 +60,16 @@ void dev_setup(void) {
                 "/proc/self/fd/1\0"  "/dev/stdout\0"
                 "/proc/self/fd/2\0"  "/dev/stderr\0";
 
-        NULSTR_FOREACH_PAIR(j, k, symlinks)
-                symlink_and_label(j, k);
+        NULSTR_FOREACH_PAIR(j, k, symlinks) {
+                char *linkname;
+
+                if (asprintf(&linkname, "%s/%s", pathprefix, k) < 0) {
+                        log_oom();
+                        break;
+                }
+
+                symlink_and_label(j, linkname);
+
+                free(linkname);
+        }
 }
diff --git a/src/shared/dev-setup.h b/src/shared/dev-setup.h
index 58507587d4..320c0b30ba 100644
--- a/src/shared/dev-setup.h
+++ b/src/shared/dev-setup.h
@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foodevsetuphfoo
-#define foodevsetuphfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -22,6 +21,4 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-void dev_setup(void);
-
-#endif
+void dev_setup(const char *pathprefix);