diff options
Diffstat (limited to 'source3/lib/system.c')
| -rw-r--r-- | source3/lib/system.c | 72 |
1 files changed, 58 insertions, 14 deletions
diff --git a/source3/lib/system.c b/source3/lib/system.c index 47bb5259cc..b808a36d17 100644 --- a/source3/lib/system.c +++ b/source3/lib/system.c @@ -404,7 +404,7 @@ static struct timespec get_ctimespec(const struct stat *pst) structure. ****************************************************************************/ -static struct timespec calc_create_time(const struct stat *st) +static struct timespec calc_create_time_stat(const struct stat *st) { struct timespec ret, ret1; struct timespec c_time = get_ctimespec(st); @@ -426,41 +426,85 @@ static struct timespec calc_create_time(const struct stat *st) } /**************************************************************************** + Return the best approximation to a 'create time' under UNIX from a stat_ex + structure. +****************************************************************************/ + +static struct timespec calc_create_time_stat_ex(const struct stat_ex *st) +{ + struct timespec ret, ret1; + struct timespec c_time = st->st_ex_ctime; + struct timespec m_time = st->st_ex_mtime; + struct timespec a_time = st->st_ex_atime; + + ret = timespec_compare(&c_time, &m_time) < 0 ? c_time : m_time; + ret1 = timespec_compare(&ret, &a_time) < 0 ? ret : a_time; + + if(!null_timespec(ret1)) { + return ret1; + } + + /* + * One of ctime, mtime or atime was zero (probably atime). + * Just return MIN(ctime, mtime). + */ + return ret; +} + +/**************************************************************************** Return the 'create time' from a stat struct if it exists (birthtime) or else use the best approximation. ****************************************************************************/ -static struct timespec get_create_timespec(const struct stat *pst) +static void get_create_timespec(const struct stat *pst, struct stat_ex *dst) { struct timespec ret; if (S_ISDIR(pst->st_mode) && lp_fake_dir_create_times()) { - ret.tv_sec = 315493200L; /* 1/1/1980 */ - ret.tv_nsec = 0; - return ret; + dst->st_ex_btime.tv_sec = 315493200L; /* 1/1/1980 */ + dst->st_ex_btime.tv_nsec = 0; } + dst->st_ex_calculated_birthtime = false; + #if defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC) - ret = pst->st_birthtimespec; + dst->st_ex_btime = pst->st_birthtimespec; #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC) - ret.tv_sec = pst->st_birthtime; - ret.tv_nsec = pst->st_birthtimenspec; + dst->st_ex_btime.tv_sec = pst->st_birthtime; + dst->st_ex_btime.tv_nsec = pst->st_birthtimenspec; #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIME) - ret.tv_sec = pst->st_birthtime; - ret.tv_nsec = 0; + dst->st_ex_btime.tv_sec = pst->st_birthtime; + dst->st_ex_btime.tv_nsec = 0; #else - ret = calc_create_time(pst); + dst->st_ex_btime = calc_create_time_stat(pst); + dst->st_ex_calculated_birthtime = true; #endif /* Deal with systems that don't initialize birthtime correctly. * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>. */ if (null_timespec(ret)) { - ret = calc_create_time(pst); + dst->st_ex_btime = calc_create_time_stat(pst); + dst->st_ex_calculated_birthtime = true; } - return ret; } +/**************************************************************************** + If we update a timestamp in a stat_ex struct we may have to recalculate + the birthtime. For now only implement this for write time, but we may + also need to do it for mtime and ctime. JRA. +****************************************************************************/ + +void update_stat_ex_writetime(struct stat_ex *dst, + struct timespec write_ts) +{ + dst->st_ex_mtime = write_ts; + + /* We may have to recalculate btime. */ + if (dst->st_ex_calculated_birthtime) { + dst->st_ex_btime = calc_create_time_stat_ex(dst); + } +} static void init_stat_ex_from_stat (struct stat_ex *dst, const struct stat *src) @@ -476,7 +520,7 @@ static void init_stat_ex_from_stat (struct stat_ex *dst, dst->st_ex_atime = get_atimespec(src); dst->st_ex_mtime = get_mtimespec(src); dst->st_ex_ctime = get_ctimespec(src); - dst->st_ex_btime = get_create_timespec(src); + get_create_timespec(src, dst); dst->st_ex_blksize = src->st_blksize; dst->st_ex_blocks = src->st_blocks; |