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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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uuencode查看　uuencode　在百度字典中的解释百度英翻中〔查看〕
uuencode查看　uuencode　在Google字典中的解释Google英翻中〔查看〕
uuencode查看　uuencode　在Yahoo字典中的解释Yahoo英翻中〔查看〕

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英文字典中文字典相关资料:


  • uuencoding - Wikipedia
    uuencoding is a form of binary-to-text encoding that originated in the Unix programs uuencode and uudecode written by Mary Ann Horton at the University of California, Berkeley in 1980, [1] for encoding binary data for transmission in email systems
  • UUencode - UU Encoding - Online Decoder, Encoder, Converter
    Tool to encrypt decrypt with UUEncode UUEncode (for Unix to Unix Encoding) is a symmetric encryption based on conversion of binary data (split into 6-bit blocks) into ASCII characters
  • UUEncode UUDecode Online
    UUEncoding (Unix-to-Unix encoding) is a binary-to-text encoding method that was historically used to transmit binary data through text-based communication systems, particularly email and UUCP (Unix-to-Unix Copy Program)
  • UUEncode Decoder Online Tool | ToolWard
    UUEncode Decoder is a free online Cipher Encoding tool on ToolWard that helps you Encode and decode UUEncoded text — legacy Unix file transfer format It works directly in your browser with no installation required
  • Uuencoder Uudecoder — Free Online Tool
    Encode text with Unix-to-Unix encoding and decode Uuencoded data Free to use with no sign-up — the tool operates entirely in your browser, nothing sent anywhere uuencode is a browser-side encoding utility built for speed and simplicity Paste your input and the result appears within milliseconds
  • How to use the command uuencode (with examples) - CommandMasters
    The uuencode command remains a powerful utility for encoding binary files into ASCII text, particularly when navigating older transport mechanisms or systems Through its variations, users can tailor encoding processes to cater to immediate viewing, file saving, or adopting modern standards like Base64 for optimal contemporary compatibility
  • UUencode Decoder | Unix-to-Unix Encoding Tool
    Free online UUencode encoder and decoder Classic Unix encoding for binary data transmission Convert files and text using traditional uuencoding format
  • What is the Uuencode (Uuencode Uudecode) command and how does it work?
    Learn how the Uuencode command encodes a binary file or email attachment into ASCII format to prevent corruption Explore its origins and importance
  • An In-Depth Guide to the Uuencode Command on Linux
    Uuencode, short for Unix-to-Unix encode, is a data encoding standard that converts binary data into ASCII characters so that the data can be stored and transmitted over mediums that support only ASCII text
  • uuencode Command - IBM
    Description The uuencode command converts a binary file to ASCII data This is useful before using BNU (or uucp) mail to send the file to a remote system The uudecode command converts ASCII data created by the uuencode command back into its original binary form





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