readahead: disable collect/replay during system updates

[elogind.git] / src / system-update-generator / system-update-generator.c

diff --git a/src/system-update-generator/system-update-generator.c b/src/system-update-generator/system-update-generator.c
index 30fdbc3ee8cda3bfb1283493398016b94992a3cd..d148550e7c93c14a3a61eb86eb54ceb627bc7610 100644 (file)
--- a/src/system-update-generator/system-update-generator.c
+++ b/src/system-update-generator/system-update-generator.c
@@ -60,21 +60,34 @@ static int generate_symlink(void) {
 
         free(p);
 
+        /* Also try to disable readahead, but don't try too hard */
+        p = strappend(arg_dest, "/systemd-readahead-collect.service");
+        if (p) {
+                symlink("/dev/null", p);
+                free(p);
+        }
+
+        p = strappend(arg_dest, "/systemd-readahead-replay.service");
+        if (p) {
+                symlink("/dev/null", p);
+                free(p);
+        }
+
         return 0;
 }
 
 int main(int argc, char *argv[]) {
         int r;
 
-        if (argc > 2) {
-                log_error("This program takes one or no arguments.");
+        if (argc > 1 && argc != 4) {
+                log_error("This program takes three or no arguments.");
                 return EXIT_FAILURE;
         }
 
         if (argc > 1)
-                arg_dest = argv[1];
+                arg_dest = argv[2];
 
-        log_set_target(LOG_TARGET_AUTO);
+        log_set_target(LOG_TARGET_SAFE);
         log_parse_environment();
         log_open();