如何使file命令使用update-mime-database命令生成的magic文件
我使用的是 Ubuntu 服务器 11.10。
我的问题是 file 命令检测到应将 video/mp2t mime 类型设置为 application/octet-stream 的文件，
所以这里是我做了什么：
我确保
/usr/share/mime/packages/freedesktop.org.xml包含正确的mp2t描述。我运行了
update-mime-database命令，该命令除其他外还创建了一个新的 magic 文件：/usr/share/mime/magic。我发现在运行
file -v时，它说它正在使用/etc/magic:/usr/share/misc/magic作为魔法文件。< /p>所以，我告诉
file命令使用我的新魔法文件：file -m /usr/share/mime/magic MY_VIDEOFILE
这就是问题开始的地方。当使用新的 magic 文件运行 file 命令时，我得到以下输出：
/usr/share/mime/magic, 1: Warning: offset `MIME-Magic' invalid
/usr/share/mime/magic, 1: Warning: type `MIME-Magic' invalid
/usr/share/mime/magic, 2: Warning: offset `[90:application/docbook+xml]' invalid
/usr/share/mime/magic, 2: Warning: type `[90:application/docbook+xml]' invalid
.
. (921 lines removed from the output)
.
/usr/share/mime/magic, 1173: Warning: offset `[10:text/x-tex]' invalid
/usr/share/mime/magic, 1173: Warning: type `[10:text/x-tex]' invalid
file: No current entry for continuation
看起来 file 命令需要的 magic 文件格式与 magic 文件的格式不同update-mime-database 输出的文件。
我在这里错过了什么？
如何使 file 命令接受新的 mime 类型？
I am using Ubuntu Server 11.10.
My problem is that the file command detects files that should have had the video/mp2t mime-type as application/octet-stream
So here is what I did:
I made sure that
/usr/share/mime/packages/freedesktop.org.xmlcontained the correct mp2t description.I ran the
update-mime-databasecommand that, among other things, created a new magic file:/usr/share/mime/magic.I discovered that when running
file -v, it says that it is using/etc/magic:/usr/share/misc/magicas magic files.So, I told the
filecommand to use my new magic file:file -m /usr/share/mime/magic MY_VIDEOFILE
Here is where the problem starts. When running the file command with my new magic file, I get the following output:
/usr/share/mime/magic, 1: Warning: offset `MIME-Magic' invalid
/usr/share/mime/magic, 1: Warning: type `MIME-Magic' invalid
/usr/share/mime/magic, 2: Warning: offset `[90:application/docbook+xml]' invalid
/usr/share/mime/magic, 2: Warning: type `[90:application/docbook+xml]' invalid
.
. (921 lines removed from the output)
.
/usr/share/mime/magic, 1173: Warning: offset `[10:text/x-tex]' invalid
/usr/share/mime/magic, 1173: Warning: type `[10:text/x-tex]' invalid
file: No current entry for continuation
It looks like the file command expects magic files in a different format than the format of the magic files that update-mime-database outputs.
What have I missed here?
How can I make the file command accept new mime types?
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使用共享 MIME 类型数据库似乎是错误的方法。事实上，看起来共享 MIME 数据库和
file命令使用单独的数据库（具有不同的格式）。由于
file命令版本太旧，未报告 MIME 类型video/mp2t。Ubuntu 11.10。附带版本 5.04 的
file命令。这无法报告video/mp2t类型。这就是我解决问题的方法：
我下载了较新版本的 libmagic1 deb 包。这个版本是 5.09-2。
我安装了：
问题解决了！
Using the shared MIME type database seemed to be the wrong approach. In fact, it looks like the shared MIME database and the
filecommand use seperate databases (with different formats).The MIME type
video/mp2twas not reported because of a too old version of thefilecommand.Ubuntu 11.10. comes with version 5.04 of the
filecommand. This is unable to report thevideo/mp2ttype.This is what I did to solve the problem:
I downloaded a newer version of the libmagic1 deb package. This one has version 5.09-2.
I installed it:
Problem solved!