This commit addresses #2491.
Note that a downside of this solution is that it is global: `umask()` affects
all file creation calls in the process. I believe this is safe since
`fileio.c` functions should only ever be used in the zstd binary, and these
are (almost) the only files ever created by zstd, and AIUI they're only
created in a single thread. So we can get away with messing with global state.
Note that this doesn't change the permissions of files created by `dibio.c`.
I'm not sure what those should be...
Rather than special-casing a check for `/dev/null`, this uses `stat()` to
avoid `chmod()`-ing any non-regular file. I believe this is the desirable
behavior. `UTIL_chmod()` is never called on directories at the moment, only
output files.
Instead of calling `stat()`, these functions accept the result of a previous
`stat()` call on the file in question, which will allow us to make multiple
decisions around a file without redundant `stat()` calls.
I want to introduce versions of many of these functions that take pre-
populated `stat_t` objects and use those rather than doing their own redundant
`stat()` internally. These functions will have `...Stat()` suffixes. So this
commit renames these existing functions into the active voice, to avoid
confusion.
Since version 1.4.5 and commit
5af8cb7aea, if st_mtime is not defined,
programs/util.c uses utime without including utime.h which will raise
the following build failure on some of the buildroot autobuilders:
util.c: In function 'UTIL_setFileStat':
util.c:161:24: error: storage size of 'timebuf' isn't known
struct utimbuf timebuf;
^~~~~~~
Fixes:
- http://autobuild.buildroot.org/results/be902c5d110f37bce622a2215191f155b7d3e7e0
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
* All copyright lines now have -2020 instead of -present
* All copyright lines include "Facebook, Inc"
* All licenses are now standardized
The copyright in `threading.{h,c}` is not changed because it comes from
zstdmt.
The copyright and license of `divsufsort.{h,c}` is not changed.
Cygwin currently uses the fallback implementation which just returns 1 every time,
which leads to bad performance when zstd is called with -T0 for example.
Instead use the POSIX implementation used for the BSDs which works just fine under Cygwin.
Tested under Cygwin and MSYS2.
