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Annotation of 43BSDReno/share/doc/usd/03.shell/t4, revision 1.1

1.1     ! root        1: .\"    @(#)t4  6.1 (Berkeley) 5/22/86
        !             2: .\"
        !             3: .bp
        !             4: .SH
        !             5: Appendix\ A\ -\ Grammar
        !             6: .LP
        !             7: .DS
        !             8: \fIitem:               word
        !             9:                input-output
        !            10:                name = value
        !            11: .sp 0.8
        !            12: simple-command: item
        !            13:                simple-command item
        !            14: .sp 0.8
        !            15: command:       simple-command
        !            16:                \fB( \fIcommand-list \fB)
        !            17:                \fB{ \fIcommand-list \fB}
        !            18:                \fBfor \fIname \fBdo \fIcommand-list \fBdone
        !            19:                \fBfor \fIname \fBin \fIword \*(ZZ \fBdo \fIcommand-list \fBdone
        !            20:                \fBwhile \fIcommand-list \fBdo \fIcommand-list \fBdone
        !            21:                \fBuntil \fIcommand-list \fBdo \fIcommand-list \fBdone
        !            22:                \fBcase \fIword \fBin \fIcase-part \*(ZZ \fBesac
        !            23:                \fBif \fIcommand-list \fBthen \fIcommand-list \fIelse-part \fBfi
        !            24: .sp 0.8
        !            25: \fIpipeline:           command
        !            26:                pipeline \fB\*(VT\fI command
        !            27: .sp 0.8
        !            28: andor:         pipeline
        !            29:                andor \fB&&\fI pipeline
        !            30:                andor \fB\*(VT\*(VT\fI pipeline
        !            31: .sp 0.8
        !            32: command-list:  andor
        !            33:                command-list \fB;\fI
        !            34:                command-list \fB&\fI
        !            35:                command-list \fB;\fI andor
        !            36:                command-list \fB&\fI andor
        !            37: .sp 0.8
        !            38: input-output:  \fB> \fIfile
        !            39:                \fB< \fIfile
        !            40:                \fB\*(AP \fIword
        !            41:                \fB\*(HE \fIword
        !            42: .sp 0.8
        !            43: file:          word
        !            44:                \fB&\fI digit
        !            45:                \fB&\fI \(mi
        !            46: .sp 0.8
        !            47: case-part:     pattern\fB ) \fIcommand-list\fB ;;
        !            48: .sp 0.8
        !            49: \fIpattern:            word
        !            50:                pattern \fB\*(VT\fI word
        !            51: .sp 0.8
        !            52: \fIelse-part:  \fBelif \fIcommand-list\fB then\fI command-list else-part\fP
        !            53:                \fBelse \fIcommand-list\fI
        !            54:                empty
        !            55: .sp 0.8
        !            56: empty:
        !            57: .sp 0.8
        !            58: word:          \fRa sequence of non-blank characters\fI
        !            59: .sp 0.8
        !            60: name:          \fRa sequence of letters, digits or underscores starting with a letter\fI
        !            61: .sp 0.8
        !            62: digit:         \fB0 1 2 3 4 5 6 7 8 9\fP
        !            63: .DE
        !            64: .LP
        !            65: .bp
        !            66: .SH
        !            67: Appendix\ B\ -\ Meta-characters\ and\ Reserved\ Words
        !            68: .LP
        !            69: a) syntactic
        !            70: .RS
        !            71: .IP \fB\*(VT\fR 6
        !            72: pipe symbol
        !            73: .IP \fB&&\fR 6
        !            74: `andf' symbol
        !            75: .IP \fB\*(VT\*(VT\fR 6
        !            76: `orf' symbol
        !            77: .IP \fB;\fP 6
        !            78: command separator
        !            79: .IP \fB;;\fP 6
        !            80: case delimiter
        !            81: .IP \fB&\fP 6
        !            82: background commands
        !            83: .IP \fB(\ )\fP 6
        !            84: command grouping
        !            85: .IP \fB<\fP 6
        !            86: input redirection
        !            87: .IP \fB\*(HE\fP 6
        !            88: input from a here document
        !            89: .IP \fB>\fP 6
        !            90: output creation
        !            91: .IP \fB\*(AP\fP 6
        !            92: output append
        !            93: .sp 2
        !            94: .RE
        !            95: .LP
        !            96: b) patterns
        !            97: .RS
        !            98: .IP \fB\*(ST\fP 6
        !            99: match any character(s) including none
        !           100: .IP \fB?\fP 6
        !           101: match any single character
        !           102: .IP \fB[...]\fP 6
        !           103: match any of the enclosed characters
        !           104: .sp 2
        !           105: .RE
        !           106: .LP
        !           107: c) substitution
        !           108: .RS
        !           109: .IP \fB${...}\fP 6
        !           110: substitute shell variable
        !           111: .IP \fB\`...\`\fP 6
        !           112: substitute command output
        !           113: .sp 2
        !           114: .RE
        !           115: .LP
        !           116: d) quoting
        !           117: .RS
        !           118: .IP \fB\e\fP 6
        !           119: quote the next character
        !           120: .IP \fB\'...\'\fP 6
        !           121: quote the enclosed characters except for \'
        !           122: .IP \fB"\&..."\fR 6
        !           123: quote the enclosed characters except
        !           124: for \fB$ \` \e "\fP
        !           125: .sp 2
        !           126: .RE
        !           127: .LP
        !           128: e) reserved words
        !           129: .DS
        !           130: .ft B
        !           131: if then else elif fi
        !           132: case in esac
        !           133: for while until do done
        !           134: {  }
        !           135: .ft
        !           136: .DE

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