diff options
Diffstat (limited to 'src/journal/journal-vacuum.c')
| -rw-r--r-- | src/journal/journal-vacuum.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/src/journal/journal-vacuum.c b/src/journal/journal-vacuum.c index dbf5d2261b..d141fe0ffb 100644 --- a/src/journal/journal-vacuum.c +++ b/src/journal/journal-vacuum.c @@ -121,22 +121,30 @@ static void patch_realtime( } static int journal_file_empty(int dir_fd, const char *name) { - int r; - le64_t n_entries; _cleanup_close_ int fd; + struct stat st; + le64_t n_entries; + ssize_t n; fd = openat(dir_fd, name, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK); if (fd < 0) return -errno; - if (lseek(fd, offsetof(Header, n_entries), SEEK_SET) < 0) + if (fstat(fd, &st) < 0) return -errno; - r = read(fd, &n_entries, sizeof(n_entries)); - if (r != sizeof(n_entries)) - return r == 0 ? -EINVAL : -errno; + /* If an offline file doesn't even have a header we consider it empty */ + if (st.st_size < (off_t) sizeof(Header)) + return 1; + + /* If the number of entries is empty, we consider it empty, too */ + n = pread(fd, &n_entries, sizeof(n_entries), offsetof(Header, n_entries)); + if (n < 0) + return -errno; + if (n != sizeof(n_entries)) + return -EIO; - return le64toh(n_entries) == 0; + return le64toh(n_entries) <= 0; } int journal_directory_vacuum( |