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uuencode    
加码方法之一,能将二进位资料转换成ASCII的档案

加码方法之一,能将二进位资料转换成ASCII的档案

(Unix-to-Unix encode) A {Unix} program for
encoding {binary} data as {ASCII}. Uuencode was originally
used with {uucp} to transfer binary files over {serial lines}
which did not preserve the top bit of characters, but is now
used for sending binary files by {e-mail} and posting to
{Usenet} newsgroups etc. The program uudecode reverses the
effect of uuencode, recreating the original binary file
exactly.

Uuencoded data starts with a line of the form

begin

where is the files read/write/execute permissions as
three {octal} digits and is the name to be used when
recreating the binary data.

Uuencode repeatedly takes in a group of three bytes, adding
trailing zeros if there are less than three bytes left. These
24 bits are split into four groups of six which are treated as
numbers between 0 and 63. Decimal 32 is added to each number
and they are output as ASCII characters from 32 (space) to
3263 = 95 (underscore). Each group of sixty output
characters (corresponding to 45 input bytes) is output as a
separate line preceded by an 'M' (ASCII code 77 = 3245). At
the end of the input, if there are N output characters left
after the last group of sixty and N>0 then they will be
preceded by the character whose code is 32N. Finally, a line
containing just a single space is output, followed by one
containing just "end".

Sometimes each data line has an extra dummy character added to
avoid problems which mailers that strip trailing spaces.
These characters are ignored by uudecode.

Despite using this limited range of characters, there are
still some problems encountered when uuencoded data passes
through certain old computers. The worst offenders are
computers using non-ASCII character sets such as EBCDIC.

{Base 64} encoding is probably now more commonly used than
uuencode.

(2004-07-17)


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  • How do I get UUENCODE to work? - Unix Linux Stack Exchange
    How to get uuencode on Fedora 17 Linux Find out what provides for uuencode using yum: yum provides uuencode Read what yum tells you: sharutils-4 11 1-3 fc17 x86_64 : The GNU shar utilities for packaging and unpackaging shell archives Repo : @updates Matched from: Filename : usr bin uuencode
  • Uuencode is displaying the file contents in email body instead of . . .
    Thanks for your response! I tried the below: bash-4 1$ uuencode vin dat vin_attchment dat > vfile dat bash-4 1$ mailx -a vfile dat -s "testing2" [email protected] < dev null The result was that- (i) the attachment has a file and its contents are encoded :( (ii) the body is empty - which is fine I suspect the issue is with the uudecode utility
  • Email attachment created in bash script with uuencode and ssmtp is . . .
    uuencode is a kind of tinkering If you need something that just works, I recommend the use of s-nail program It have a switch -a especially to send files
  • Mail command to send attachements - Unix Linux Stack Exchange
    which clearly tell that uuencode utility is not found I there any other way to send attachments with mail through command line At the same time I don't have admin access for the same to install the utility ( I use AIX 5 version Server )
  • Uuencode displaying attachment content in email body
    I am using uuencode with mailx to attach a zip file In following code, the if block works perfectly and I get Deletions zip as an attachment in the email But, whenever the else block is executed I don't get the attachment but the binary code in the email body instead Code (Perl code invoking linux commands):
  • shell script - sending multiple attachment using uuencode - Unix . . .
    If the OP hadn't specified uuencode, I would preferred to use a tool like mime-construct or makemime or write a trivial script using one of the perl or python MIME mail generating modules BTW, looking at my answer again, if I could have assumed bash rather than sh, I would have used an array for FILES rather than a string
  • uuencode Command not found but man working fine
    uuencode used to be part of the "standard selection" of commands, but many of these are no-longer installed by default (eg like compact, vi and ed) - mostly because new and better commands have taken their place There are however "standard selections" of man-pages too (which is installed when you install man), so it's very likely that such a
  • Linux mail, attachement with uuencode works until I add headers
    I have a command I have been using to send emails with an attachment and a message body (cat msg_file txt; uuencode file csv file csv) | mail -s "subject" user@mail com as soon as I add the -a opt
  • linux - What are some better options for encoding email attachments . . .
    I used the command within a bash script to attach a file to an email, and have it in a couple other scripts as well However, a few of our machines do not even support uuencode, so what are some better options for attaching files to emails than uuencode?
  • Is there a way to attach file in sendmail command without using uuencode
    Notice that, as stated in the respective man pages: Uuencode and uudecode are used to transmit binary files over transmission mediums that do not support other than simple ASCII data Is cpu_usage log a binary file? If not it does not make sense calling uuencode –





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