diff options
Diffstat (limited to 'source3/lib/system.c')
| -rw-r--r-- | source3/lib/system.c | 225 |
1 files changed, 216 insertions, 9 deletions
diff --git a/source3/lib/system.c b/source3/lib/system.c index 517e347c0f..5158750f98 100644 --- a/source3/lib/system.c +++ b/source3/lib/system.c @@ -290,6 +290,195 @@ int sys_fcntl_long(int fd, int cmd, long arg) return ret; } +/**************************************************************************** + Return the best approximation to a 'create time' under UNIX from a stat + structure. +****************************************************************************/ + +static time_t calc_create_time(const struct stat *st) +{ + time_t ret, ret1; + + ret = MIN(st->st_ctime, st->st_mtime); + ret1 = MIN(ret, st->st_atime); + + if(ret1 != (time_t)0) { + 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) +{ + 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; + } + +#if defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC) + ret = pst->st_birthtimespec; +#elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC) + ret.tv_sec = pst->st_birthtime; + ret.tv_nsec = pst->st_birthtimenspec; +#elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIME) + ret.tv_sec = pst->st_birthtime; + ret.tv_nsec = 0; +#else + ret.tv_sec = calc_create_time(pst); + ret.tv_nsec = 0; +#endif + + /* Deal with systems that don't initialize birthtime correctly. + * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>. + */ + if (null_timespec(ret)) { + ret.tv_sec = calc_create_time(pst); + ret.tv_nsec = 0; + } + return ret; +} + +/**************************************************************************** + Get/Set all the possible time fields from a stat struct as a timespec. +****************************************************************************/ + +static struct timespec get_atimespec(const struct stat *pst) +{ +#if !defined(HAVE_STAT_HIRES_TIMESTAMPS) + struct timespec ret; + + /* Old system - no ns timestamp. */ + ret.tv_sec = pst->st_atime; + ret.tv_nsec = 0; + return ret; +#else +#if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC) + return pst->st_atim; +#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC) + struct timespec ret; + ret.tv_sec = pst->st_atime; + ret.tv_nsec = pst->st_atimensec; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N) + struct timespec ret; + ret.tv_sec = pst->st_atime; + ret.tv_nsec = pst->st_atime_n; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_UMTIME) + struct timespec ret; + ret.tv_sec = pst->st_atime; + ret.tv_nsec = pst->st_uatime * 1000; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC) + return pst->st_atimespec; +#else +#error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT +#endif +#endif +} + +static struct timespec get_mtimespec(const struct stat *pst) +{ +#if !defined(HAVE_STAT_HIRES_TIMESTAMPS) + struct timespec ret; + + /* Old system - no ns timestamp. */ + ret.tv_sec = pst->st_mtime; + ret.tv_nsec = 0; + return ret; +#else +#if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC) + return pst->st_mtim; +#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC) + struct timespec ret; + ret.tv_sec = pst->st_mtime; + ret.tv_nsec = pst->st_mtimensec; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N) + struct timespec ret; + ret.tv_sec = pst->st_mtime; + ret.tv_nsec = pst->st_mtime_n; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_UMTIME) + struct timespec ret; + ret.tv_sec = pst->st_mtime; + ret.tv_nsec = pst->st_umtime * 1000; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC) + return pst->st_mtimespec; +#else +#error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT +#endif +#endif +} + +static struct timespec get_ctimespec(const struct stat *pst) +{ +#if !defined(HAVE_STAT_HIRES_TIMESTAMPS) + struct timespec ret; + + /* Old system - no ns timestamp. */ + ret.tv_sec = pst->st_ctime; + ret.tv_nsec = 0; + return ret; +#else +#if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC) + return pst->st_ctim; +#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC) + struct timespec ret; + ret.tv_sec = pst->st_ctime; + ret.tv_nsec = pst->st_ctimensec; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N) + struct timespec ret; + ret.tv_sec = pst->st_ctime; + ret.tv_nsec = pst->st_ctime_n; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_UMTIME) + struct timespec ret; + ret.tv_sec = pst->st_ctime; + ret.tv_nsec = pst->st_uctime * 1000; + return ret; +#elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC) + return pst->st_ctimespec; +#else +#error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT +#endif +#endif +} + +static void init_stat_ex_from_stat (struct stat_ex *dst, + const struct stat *src) +{ + dst->st_ex_dev = src->st_dev; + dst->st_ex_ino = src->st_ino; + dst->st_ex_mode = src->st_mode; + dst->st_ex_nlink = src->st_nlink; + dst->st_ex_uid = src->st_uid; + dst->st_ex_gid = src->st_gid; + dst->st_ex_rdev = src->st_rdev; + dst->st_ex_size = src->st_size; + 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); + dst->st_ex_blksize = src->st_blksize; + dst->st_ex_blocks = src->st_blocks; +} + /******************************************************************* A stat() wrapper that will deal with 64 bit filesizes. ********************************************************************/ @@ -300,10 +489,16 @@ int sys_stat(const char *fname,SMB_STRUCT_STAT *sbuf) #if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_STAT64) ret = stat64(fname, sbuf); #else - ret = stat(fname, sbuf); + struct stat statbuf; + ret = stat(fname, &statbuf); #endif - /* we always want directories to appear zero size */ - if (ret == 0 && S_ISDIR(sbuf->st_mode)) sbuf->st_size = 0; + if (ret == 0) { + /* we always want directories to appear zero size */ + if (S_ISDIR(statbuf.st_mode)) { + statbuf.st_size = 0; + } + init_stat_ex_from_stat(sbuf, &statbuf); + } return ret; } @@ -317,10 +512,16 @@ int sys_fstat(int fd,SMB_STRUCT_STAT *sbuf) #if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_FSTAT64) ret = fstat64(fd, sbuf); #else - ret = fstat(fd, sbuf); + struct stat statbuf; + ret = fstat(fd, &statbuf); #endif - /* we always want directories to appear zero size */ - if (ret == 0 && S_ISDIR(sbuf->st_mode)) sbuf->st_size = 0; + if (ret == 0) { + /* we always want directories to appear zero size */ + if (S_ISDIR(statbuf.st_mode)) { + statbuf.st_size = 0; + } + init_stat_ex_from_stat(sbuf, &statbuf); + } return ret; } @@ -334,10 +535,16 @@ int sys_lstat(const char *fname,SMB_STRUCT_STAT *sbuf) #if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_OFF64_T) && defined(HAVE_LSTAT64) ret = lstat64(fname, sbuf); #else - ret = lstat(fname, sbuf); + struct stat statbuf; + ret = lstat(fname, &statbuf); #endif - /* we always want directories to appear zero size */ - if (ret == 0 && S_ISDIR(sbuf->st_mode)) sbuf->st_size = 0; + if (ret == 0) { + /* we always want directories to appear zero size */ + if (S_ISDIR(statbuf.st_mode)) { + statbuf.st_size = 0; + } + init_stat_ex_from_stat(sbuf, &statbuf); + } return ret; } |