94 lines
1.9 KiB
Plaintext
94 lines
1.9 KiB
Plaintext
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‹ShellTerm› :=
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| Lit : "«String»" | "«Path»~«Sep Char '/'»~«Seq Char»~«TerminatedArray AsciiChar~Byte 0»"
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| Var : $«ProcessArgument~ℕ~«PositionalInt 10 BigEndian»»
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| Sub : $(«Process»)
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$PATH:›Sequence Path‹
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:›SeparatedSequence Char '/' ‹
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:›Sequence ›Sequence Char‹‹
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:›‹
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:‹SeparatedSequence Char ':'‹
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:‹Sequence Char›
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&‹OsString~›
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~‹List Char~Vec Byte›
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Seq
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Vec
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Sep
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read :: Sep -> Seq
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read (Sep xs) d ->
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deco :: Style -> Seq ->
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ShellTerm::eval t:‹ShellTerm› -> ‹String› {
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match t {
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ShellTerm::Lit "s:«String»" -> {
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}
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ShellTerm::Var var:$
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}
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}
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$PATH : ‹Sequence Path› ~ ‹SeparatedSequence Char ':'›
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ShellTerm::eval := «» -> «»
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«Path» :> «»
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‹Path› := [ PathSegment ] ~ ‹List ›
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[Char]
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:separator '/'
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:
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‹ a: Int x b: Int ›
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( a b )
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// Process is a Structure Type
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‹Process› := {
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env : ‹ Symbol -> ShellTerm ›
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exe : ‹ Path ›
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args : ‹ [ShellTerm] ›
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stdin : ‹ Pipe ›
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}
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// OsString is an Abstraction Type
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[OsString] := [Sequence AsciiChar] ~ [Sequence Byte] ~ [TerminatedSequence Byte 0] ~ [Pointer Byte] ~ [MachineWord]
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execve := {
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‹ Process
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~ { env : Symbol, exe: Path~, } ›
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->
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}
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precedence of operators: '~' < ':' < '[ ]' < '{ }'
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<Ls> := [ < ]
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‹Process exe=/bin/ls› : ‹Process› := {
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args : ‹ [ProcessArgument] ~ []
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}
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:> «PosixShellScript ~ String» { ... }
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:> «TerminalView» { ... }
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»ProcessId«~»MachineInt«~»MachineWord«~»Register«
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«ProcessId»~«MachineInt»~«MachineWord»~«Register»
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Pipe::read = {
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fd: const ( FileDescriptor ~ MachineInt ~ Register ~ EAX )
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buf: ( Array Byte ~ )
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} ->
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stdout := «ProcessId» -> «FileDescriptor»~«MachineInt»~«Register»~«EAX»
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poorly-written shell scripts often do not handle filenames with spaces.
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