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posix-utils
- posix-utils
- Documentation
- string-trim-eol
- software-eol-string
- environment-string
- environment-variables->environment-list
- qs*
- qs-quote
- qs-string
- qs-argument
- get-commandline-result
- get-command-result
- get-echo-result
- environment-variable-bound?
- environment-variable-true?
- register-environment-variable-feature!
- get-shell-variable
- shell-variable-bound?
- shell-variable-true?
- register-shell-variable-feature!
- Usage
- Author
- Version history
- License
Documentation
Miscellaneous Posix related routines.
string-trim-eol
[procedure] (string-trim-eol STR) -> stringRemoves last instance of the platform dependent EOL character sequence from the string STR.
software-eol-string
[constant] software-eol-stringPlatform dependent EOL character sequence string.
environment-string
[procedure] (environment-string CELL) -> stringReturns "VAR=VAL", where VAR is (car CELL) & VAL is (cdr CELL).
environment-variables->environment-list
[procedure] (environment-variables->environment-list EVS) -> (list-of string)Returns a list of "VAR=VAL" from the environment variables association-list EVS.
qs*
[procedure] (qs* STR [DELIM #\"]) -> stringResult like (conc DELIM STR DELIM).
qs-quote
[procedure] (qs-quote OBJ) -> stringReturns "'OBJ'".
qs-string
[procedure] (qs-string OBJ) -> stringReturns ""OBJ"".
qs-argument
[procedure] (qs-argument OBJ [LITERAL? [DELIM #\"]]) -> stringReturns a quoted, quasiquoted, or evaluated shell argument string.
An OBJ is
- '* (quote . *)
- quoted * unless LITERAL?
- `* (quasiquote . *)
- quasiquoted * unless LITERAL?
- *
- evaluated
A shell quote is
- quoted
- ' string '
- quasiquoted
- ` ,* (unquote *) | ,@* (unquote-splicing *) | * (quote) `
- evaluated
- " string "
A quasiquoted OBJ is
- ,* (unquote *)
- evaluated *
- ,@* (unquote-splicing *)
- evaluated * #\space ...
- * (quote)
- quoted *
get-commandline-result
[procedure] (get-commandline-result CMND LINE) -> stringReturns the result of ''shell'' CMND LINE.
CMND is a string.
LINE is a string.
get-command-result
[procedure] (get-command-result CMND ARG ...) -> stringReturns the result of ''shell'' CMND ARG ....
CMND is a string.
ARG ... are string ... & processed by qs-argument.
get-echo-result
[procedure] (get-echo-result EXP) -> stringReturns the result of echo "EXP", w/o the echo eol.
EXP is a string.
environment-variable-bound?
[procedure] (environment-variable-bound? NAME) -> (or boolean string)Does the environment variable NAME exist with a non-null value?
NAME is a string.
FOO=1 BAR= csi -q -R posix-utils #;1> (environment-variable-bound? "FOO") #t #;2> (environment-variable-bound? "BAR") #f
environment-variable-true?
[procedure] (environment-variable-true? NAME [TRUTHS ("y" "yes" "1")]) -> booleanIs the environment variable NAME lowercase value in TRUTHS?
NAME is a string. TRUTHS is a (list-of string) recognized as true values.
FOO=1 BAR= csi -q -R posix-utils #;1> (environment-variable-true? "FOO") #t #;2> (environment-variable-true? "BAR") #f
register-environment-variable-feature!
[procedure] (register-environment-variable-feature! NAME) -> (or boolean symbol)Registers an existing NAME value as a feature. Returns #f or the registered feature symbol.
NAME is a string.
get-shell-variable
[procedure] (get-shell-variable NAME) -> stringReturns the shell variable NAME value.
NAME is a string.
shell-variable-bound?
[procedure] (shell-variable-bound? NAME) -> (or boolean string)Does the shell variable NAME have a non-null value?
NAME is a string.
shell-variable-true?
[procedure] (shell-variable-true? NAME [TRUTHS ("y" "yes" "1")]) -> booleanIs the shell variable NAME lowercase value in TRUTHS?
NAME is a string. TRUTHS is a (list-of string) recognized as true values.
register-shell-variable-feature!
[procedure] (register-shell-variable-feature! NAME) -> (or boolean symbol)Registers an existing NAME value as a feature. Returns #f or the registered feature symbol.
NAME is a string.
#;1> (register-shell-variable-feature! "OSTYPE") darwin7 ;ymmv
Usage
(require-extension posix-utils)
Author
Version history
- 1.1.0
- Added string-trim-eol , software-eol-string, environment-variables->environment-list, register-environment-variable-feature!, get-shell-variable, shell-variable-bound?, shell-variable-true?, register-shell-variable-feature!
- 1.0.0
- Created.
License
Copyright (C) 2010-2018 Kon Lovett. All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the Software), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ASIS, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.