On Jan 10, 2008 10:11 AM, Ozzi <[EMAIL PROTECTED]> wrote:
> I am using the following code, which just takes a single string:
> (define (system->string cmd)
> (string-chomp (with-input-from-pipe cmd read-all)))
First, the string-chomp is pointless unless you're reading only one
line. Why chomp just the last newline of a multi-line string?
Assuming you did want to read one line of output, your code becomes
(with-input-from-pipe cmd read-line)
since read-line does a chomp internally. Not really worthy of a
utility function.
If you are reading multi-line output, and you want to slurp everything
into one string, you don't need the chomp so you'll get:
(with-input-from-pipe cmd read-all)
Anyway, slurping everything is pretty rare. Most of the time you
parse the output line-by-line without allocating a large buffer, which
system->string can't handle.
Finally, if you really do want to slurp all lines at once, you might
as well use read-lines to slurp them into a list of strings (without
trailing newlines):
#;3> (with-input-from-pipe "ls" read-lines)
("Applications" "Desktop" "Documents" ...)
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