jail: replace /etc/resolv.conf with symlink in extroot+overlay

[oweals/procd.git] / sysupgrade.c

diff --git a/sysupgrade.c b/sysupgrade.c
index ce30798e5478877ae82ea0a4b225e31c2ef40134..fc588b0248353137d4b81fce130d2d35d8dfa710 100644 (file)
--- a/sysupgrade.c
+++ b/sysupgrade.c
@@ -25,7 +25,8 @@
 
 #include <libubox/blobmsg.h>
 
-void sysupgrade_exec_upgraded(const char *prefix, char *path, char *command,
+void sysupgrade_exec_upgraded(const char *prefix, char *path,
+                             const char *backup, char *command,
                              struct blob_attr *options)
 {
        char *wdt_fd = watchdog_fd();
@@ -48,6 +49,9 @@ void sysupgrade_exec_upgraded(const char *prefix, char *path, char *command,
                setenv("WDTFD", wdt_fd, 1);
        }
 
+       if (backup)
+               setenv("UPGRADE_BACKUP", backup, 1);
+
        blobmsg_for_each_attr(option, options, rem) {
                const char *prefix = "UPGRADE_OPT_";
                char value[11];