unix - I am having trouble understanding what ${@} means in KSH -

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No Long Questions, What Does It Mean? 

  log message "file: $ {@}"

log-mail () is a method that logs a message with a timestamp.

But what does heck do 

  $ {@}

mean? I should also mention that there are $ 1 and $ 2 in the script too Google does not produce any results

< P> Verbatim: 

  f () {printf '% s' N' "file: $ @"; } "First argument" "second argument" will expand in "third argument"

and run the command: 

  printf '% s \ n' "file : The first argument "second argument" "third argument"

This means that your logic list ( $ 1 , $ 2 , $ 3 , etc.) arguments (not throwing any information provided by the user through the quote)

It is different from: 

  printf '% s \ n' file: $ @

or 

  printf '% s \ N' file: $ *

both of which are the same: 

  printf '% s \ N "" file: "" first "" logic "" second "" argument "" third "" argument "

... expand both the string segmentation and glob- logic list, So if the user has passed, then say, "*" (inside the quotation marks to make it literally), without using it here, the character can be used as a globe Will change with the expansion to the results, however, viz. In addition to the list of files in the current directory, besides the other side effects of string-splitting, such as nullions or tabs are to be replaced.

This also differs from: 

  printf '% s \ n' 'file: $ * "

Which is similar: 

  printf '% s \ n' "file: first argument second logic third argument"

..., as you above


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