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Adds note about system* output. UNTESTED

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Michael W 2012-05-07 10:52:33 -06:00 committed by Eli Barzilay
parent 06728e1dd2
commit 267a009e03
1 changed files with 9 additions and 0 deletions
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collects/scribblings/reference/subprocess.scrbl
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@ -328,6 +328,15 @@ See also @racket[current-subprocess-custodian-mode] and
@racket[subprocess-group-enabled], which affect the subprocess used to @racket[subprocess-group-enabled], which affect the subprocess used to
implement @racket[system].} implement @racket[system].}
The resulting process writes to @racket[(current-output-port)], reads from
@racket[(current-input-port)], and logs errors to @racket[(current-error-port)].
This means that processes show output to the screen and read from the keyboard by default.
If you just want to gather the process's output to a string, for example, use:
@racketblock[
(with-output-to-string (lambda () (system "date")))
]
@defproc*[([(system* [command path-string?] [arg (or/c path? string? bytes?)] ...) boolean?] @defproc*[([(system* [command path-string?] [arg (or/c path? string? bytes?)] ...) boolean?]
[(system* [command path-string?] [exact 'exact] [arg string?]) boolean?])]{ [(system* [command path-string?] [exact 'exact] [arg string?]) boolean?])]{