ref: 43de7b8419fa3582af6df803473ef1bde2ce5c23
dir: /man/1/alphabet-main/
.TH ALPHABET-MAIN 1 .SH NAME main \- operators on the basic Alphabet types .SH SYNOPSIS .EX load alphabet type /string type /fd type /wfd type /status type /cmd .br .SH DESCRIPTION .I Main refers to operators defined .IR Alphabet 's (see .IR sh-alphabet (1)) root typeset .RB ( / ). .PP In the following description of the modules provided, an entry such as: .TP 10 .B echo \fIstring\fP \fR->\fP fd .PP describes a verb .BR echo , which takes one argument of type .IR string , and the result of which is of type .BR fd . If the type is not one of those described above, it should be taken to be of type .IR string . .PP All types and modules names are taken to be relative to the typeset root, .BR / . .PP Modules defined within .I main include: .TP 10 \f5auth\fP [\f5-v\fP] [\f5-k\fP \fIkeyfile\fP] [\f5-C\fP \fIalg\fP] \fIwfd\fP -> \fIwfd\fP .B Auth authenticates to a server connected to its argument .IR wfd , and optionally adds encryption to the stream. If .I keyfile is given, it gives the filename of a key file (by default .BI /usr/ user /keyring/default is used). If .I alg is given, it specifies the encryption/hash algorithm to push (e.g. .BR rc4_256/md5 ). If the .B -v flag is given, .B auth will print the name of the authenticated user to its diagnostic stream. .TP \f5cat\fP [\fIfd\fP...] -> \fIfd\fP .B Cat reads all the data from each .I fd in sequence and writes it to its resulting .IR fd . .TP \f5create\fP \fIfd\fP \fIf\fP -> \fIstatus\fP .B Create creates a file named .I f and writes to it all the data from .IR fd . .I Status will be empty if the writing has completed successfully. .TP \f5dial\fP \fIaddr\fP -> \fIwfd\fP .B Dial makes a connection to network address .IR addr (see .IR dial (2) for the address format), and returns the resulting connection. .TP \f5echo\fP [-\fIn\fP] \fIstring\fP -> \fIfd\fP .B Echo writes its argument .I string to its resulting .IR fd . If the .B -n option is given, no newline will be appended. .TP \f5export\fP \fIdir\fP -> \fIwfd\fP .B Export exports the namespace rooted at .I dir and serves it as a styx service on .IR wfd . .TP \f5fd\fP \fIn\fP -> \fIwfd\fP .B Fd takes file descriptor .IR n , and makes it available for reading and/or writing as .IR wfd . .TP \f5filter\fP \fIfd\fP \fIcmd\fP \fIarg\fP... -> \fIfd\fP .B Filter starts the shell command .IR cmd , and pipes through this all the data from its argument .I fd to its resulting .IR fd . The provided .IR arg uments are accessible in the shell command as .BR $* . .TP \f5mount\fP [\f5-abc\fP] [\f5-x\fP \fIaname\fP] \fIwfd\fP \fIdir\fP -> \fIstatus\fP .B Mount mounts a connection to a styx server (\fIwfd\fP) onto .IR dir . The meaning of the .BR -a , .BR -b , and .B -c flags is the same as for .IR mount (1). .IR Aname , if given, gives the attach name that will be passed with the mount request. '\".TP '\"\f5par\fP \fIstatus\fP... -> \fIstatus\fP '\".B Par '\"allows all its arguments to run in parallel. '\"Its exit status is that of the last argument that '\"returned a non-clean status. .TP \f5parse\fP \fIstring\fP -> \fIcmd\fP .B Parse parses .I string as a shell command or alphabet expression, and returns the result. .TP \f5print\fP \fIfd\fP \fIn\fP -> \fIstatus\fP .B Print writes all the data from .I fd to file descriptor .IR n . .TP \f5pretty\fP \fIcmd\fP -> \fIstring\fP .B Pretty returns a string representation of the alphabet expression .IR cmd which is intended to be easier to read. .TP \f5read\fP \fIf\fP -> \fIfd\fP .B Read reads the data from file .I f and writes it to its resulting .IR fd . .TP \f5rewrite\fP [\f5-d\fP \fIdsttype\fP] \fIcmd\fP \fIcmd\fP -> \fIcmd\fP .B Rewrite rewrites an alphabet expression to its canonical form, applying all auto-conversions, expanding all definitions, expanding pipe notation and checking that all types are compatible. The first .I cmd argument gives the .I alphabet expression to be rewritten; the second .I cmd should contain shell commands acceptable to .IR sh-alphabet (1), declaring all the modules used in the expression. If .I dsttype is given, it specifies the return type of the final expression; auto-conversions will be applied to attain this type, if possible. '\".TP '\"\f5seq\fP [\f5-ao\fP] \fIstatus\fP... -> \fIstatus\fP '\".B Seq '\"allows each of its arguments to run in sequence. '\"If the '\".B -a '\"flag is given, the first non-clean status it encounters '\"will cause it to terminate all subsequent arguments. '\"If the '\".B -o '\"flag is given, the first '\".I clean '\"status does the same. '\"Note that some commands (e.g. '\".BR create ) '\"do some work regardless of sequence. '\"The resulting status is that of the last command '\"that was not terminated. .TP \f5unparse\fP \fIcmd\fP -> \fIstring\fP .B Unparse is the inverse operation to .BR parse : it converts .I cmd to a string, and returns the result. .TP \f52fd\fP \fIwfd\fP -> \fIfd\fP .B 2fd converts the read-write file .I wfd to the read-only .IR fd . .SH SOURCE .BR /appl/alphabet/alphabet.b .br .B /appl/alphabet/main/*.b .SH SEE ALSO .IR sh-alphabet (1), .IR alphabet-main (2), .IR sh (1)