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author | Lennart Poettering <lennart@poettering.net> | 2023-05-15 21:31:38 +0200 |
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committer | Yu Watanabe <watanabe.yu+github@gmail.com> | 2023-05-17 01:42:01 +0900 |
commit | 84b4c7857098cebce91fc98c61696b19e79ab53f (patch) | |
tree | a33a18542986cf59cebcd5e33084fcb6a7f3a4d7 | |
parent | 871a41f0ef60cc33528dc249cb1358d0f3c1a3bc (diff) | |
download | systemd-84b4c7857098cebce91fc98c61696b19e79ab53f.tar.gz |
switch-root: add a comment regarding the safety limits of rm_rf_children()
-rw-r--r-- | src/shared/switch-root.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/shared/switch-root.c b/src/shared/switch-root.c index fa438b3c06..1ee06c8ee4 100644 --- a/src/shared/switch-root.c +++ b/src/shared/switch-root.c @@ -130,6 +130,8 @@ int switch_root(const char *new_root, if (fstat(old_root_fd, &rb) < 0) return log_error_errno(errno, "Failed to stat old root directory: %m"); + /* Note: the below won't operate on non-memory file systems (i.e. only on tmpfs, ramfs), and + * it will stop at mount boundaries */ (void) rm_rf_children(TAKE_FD(old_root_fd), 0, &rb); /* takes possession of the dir fd, even on failure */ } |