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| author | zzak <zzak@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-02-09 05:33:35 +0000 |
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| committer | zzak <zzak@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2016-02-09 05:33:35 +0000 |
| commit | f63f401e7081b97966b350fb098e2340d37b5d0d (patch) | |
| tree | 5061c3ac71cc4a1fd1ba9a31d42901384bec0f2d /ext/zlib | |
| parent | 8004d4f257a32ff3e2f34f2f9f14d7c39828816b (diff) | |
| download | ruby-f63f401e7081b97966b350fb098e2340d37b5d0d.tar.gz | |
* ext/zlib/zlib.c: Document mtime header behavior with patch by @schneems
Fixes [GH-1129]: https://github.com/ruby/ruby/pull/1129
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53785 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/zlib')
| -rw-r--r-- | ext/zlib/zlib.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c index 25b3e7afab..66e68916a8 100644 --- a/ext/zlib/zlib.c +++ b/ext/zlib/zlib.c @@ -3221,7 +3221,20 @@ rb_gzfile_set_lineno(VALUE obj, VALUE lineno) * Document-method: Zlib::GzipWriter#mtime= * * Specify the modification time (+mtime+) in the gzip header. - * Using a Fixnum or Integer + * Using a Fixnum or Integer. + * + * Setting the mtime in the gzip header does not effect the + * mtime of the file generated. Different utilities that + * expand the gzipped files may use the mtime + * header. For example the gunzip utility can use the `-N` + * flag which will set the resultant file's mtime to the + * value in the header. By default many tools will set + * the mtime of the expanded file to the mtime of the + * gzipped file, not the mtime in the header. + * + * If you do not set an mtime, the default value will be the time + * when compression started. Setting a value of 0 indicates + * no time stamp is available. */ static VALUE rb_gzfile_set_mtime(VALUE obj, VALUE mtime) |