diff options
Diffstat (limited to 'util-linux/switch_root.c')
| -rw-r--r-- | util-linux/switch_root.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/util-linux/switch_root.c b/util-linux/switch_root.c index 0c86eec..bcc4443 100644 --- a/util-linux/switch_root.c +++ b/util-linux/switch_root.c @@ -47,20 +47,20 @@ static void delete_contents(char *directory) // Skip . and .. if(*newdir=='.' && (!newdir[1] || (newdir[1]=='.' && !newdir[2]))) continue; - + // Recurse to delete contents newdir = alloca(strlen(directory) + strlen(d->d_name) + 2); sprintf(newdir, "%s/%s", directory, d->d_name); delete_contents(newdir); } closedir(dir); - + // Directory should now be empty. Zap it. rmdir(directory); } - + // It wasn't a directory. Zap it. - + } else unlink(directory); } @@ -74,18 +74,18 @@ int switch_root_main(int argc, char *argv[]) bb_opt_complementally="-2"; bb_getopt_ulflags(argc,argv,"c:",&console); - + // Change to new root directory and verify it's a different fs. newroot=argv[optind++]; - + if (chdir(newroot) || stat(".", &st1) || stat("/", &st2) || st1.st_dev == st2.st_dev) { bb_error_msg_and_die("bad newroot %s",newroot); } rootdev=st2.st_dev; - + // Additional sanity checks: we're about to rm -rf /, so be REALLY SURE // we mean it. (I could make this a CONFIG option, but I would get email // from all the people who WILL eat their filesystemss.) @@ -100,13 +100,13 @@ int switch_root_main(int argc, char *argv[]) // Zap everything out of rootdev delete_contents("/"); - + // Overmount / with newdir and chroot into it. The chdir is needed to // recalculate "." and ".." links. if (mount(".", "/", NULL, MS_MOVE, NULL) || chroot(".") || chdir("/")) bb_error_msg_and_die("moving root"); - + // If a new console specified, redirect stdin/stdout/stderr to that. if (console) { |