1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1982-2013 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Eclipse Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.eclipse.org/org/documents/epl-v10.html * 11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * David Korn <dgkorn@gmail.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 #ifndef NOTSYM 22 /* 23 * UNIX shell 24 * Written by David Korn 25 * These are the definitions for the lexical analyzer 26 */ 27 28 #include <cdt.h> 29 #include "FEATURE/options" 30 #include "shnodes.h" 31 #include "shtable.h" 32 #include "lexstates.h" 33 34 35 typedef struct _shlex_ 36 { 37 Shell_t *sh; /* pointer to the interpreter */ 38 struct argnod *arg; /* current word */ 39 struct ionod *heredoc; /* pending here document list */ 40 int token; /* current token number */ 41 int lastline; /* last line number */ 42 int lasttok; /* previous token number */ 43 int digits; /* numerical value with word token */ 44 int nonstandard; /* nonstandard construct in profile */ 45 char aliasok; /* on when alias is legal */ 46 char assignok; /* on when name=value is legal */ 47 char inexec; /* on when processing exec */ 48 char intypeset; /* on when processing typeset */ 49 char comp_assign; /* in compound assignment */ 50 char comsub; /* parsing command substitution */ 51 char noreserv; /* reserved works not legal */ 52 char typed; /* possible type definition on PATH */ 53 int inlineno; /* saved value of sh.inlineno */ 54 int firstline; /* saved value of sh.st.firstline */ 55 int assignlevel; /* nesting level for assignment */ 56 short fundepth; /* nesting level for functions */ 57 #if SHOPT_KIA 58 Sfio_t *kiafile; /* kia output file */ 59 Sfio_t *kiatmp; /* kia reference file */ 60 unsigned long script; /* script entity number */ 61 unsigned long fscript; /* script file entity number */ 62 unsigned long current; /* current entity number */ 63 unsigned long unknown; /* <unknown> entity number */ 64 off_t kiabegin; /* offset of first entry */ 65 char *scriptname; /* name of script file */ 66 Dt_t *entity_tree; /* for entity ids */ 67 #endif /* SHOPT_KIA */ 68 #ifdef _SHLEX_PRIVATE 69 _SHLEX_PRIVATE 70 #endif 71 } Lex_t; 72 73 /* symbols for parsing */ 74 #define NL '\n' 75 #define NOTSYM '!' 76 #define SYMRES 0400 /* reserved word symbols */ 77 #define DOSYM (SYMRES|01) 78 #define FISYM (SYMRES|02) 79 #define ELIFSYM (SYMRES|03) 80 #define ELSESYM (SYMRES|04) 81 #define INSYM (SYMRES|05) 82 #define THENSYM (SYMRES|06) 83 #define DONESYM (SYMRES|07) 84 #define ESACSYM (SYMRES|010) 85 #define IFSYM (SYMRES|011) 86 #define FORSYM (SYMRES|012) 87 #define WHILESYM (SYMRES|013) 88 #define UNTILSYM (SYMRES|014) 89 #define CASESYM (SYMRES|015) 90 #define FUNCTSYM (SYMRES|016) 91 #define SELECTSYM (SYMRES|017) 92 #define TIMESYM (SYMRES|020) 93 #define NSPACESYM (SYMRES|021) 94 95 #define SYMREP 01000 /* symbols for doubled characters */ 96 #define BREAKCASESYM (SYMREP|';') 97 #define ANDFSYM (SYMREP|'&') 98 #define ORFSYM (SYMREP|'|') 99 #define IOAPPSYM (SYMREP|'>') 100 #define IODOCSYM (SYMREP|'<') 101 #define EXPRSYM (SYMREP|'(') 102 #define BTESTSYM (SYMREP|'[') 103 #define ETESTSYM (SYMREP|']') 104 105 #define SYMMASK 0170000 106 #define SYMPIPE 010000 /* trailing '|' */ 107 #define SYMLPAR 020000 /* trailing LPAREN */ 108 #define SYMAMP 040000 /* trailing '&' */ 109 #define SYMGT 0100000 /* trailing '>' */ 110 #define SYMSEMI 0110000 /* trailing ';' */ 111 #define SYMSHARP 0120000 /* trailing '#' */ 112 #define IOSEEKSYM (SYMSHARP|'<') 113 #define IOMOV0SYM (SYMAMP|'<') 114 #define IOMOV1SYM (SYMAMP|'>') 115 #define FALLTHRUSYM (SYMAMP|';') 116 #define COOPSYM (SYMAMP|'|') 117 #define IORDWRSYM (SYMGT|'<') 118 #define IORDWRSYMT (SYMSEMI|'<') 119 #define IOCLOBSYM (SYMPIPE|'>') 120 #define PIPESYM2 (SYMPIPE|'&') 121 #define IPROCSYM (SYMLPAR|'<') 122 #define OPROCSYM (SYMLPAR|'>') 123 #define EOFSYM 04000 /* end-of-file */ 124 #define TESTUNOP 04001 125 #define TESTBINOP 04002 126 #define LABLSYM 04003 127 #define IOVNAME 04004 128 129 /* additional parser flag, others in <shell.h> */ 130 #define SH_EMPTY 04 131 #define SH_NOIO 010 132 #define SH_ASSIGN 020 133 #define SH_FUNDEF 040 134 #define SH_ARRAY 0100 135 #define SH_SEMI 0200 /* semi-colon after NL ok */ 136 137 #define SH_COMPASSIGN 010 /* allow compound assignments only */ 138 139 extern const char e_unexpected[]; 140 extern const char e_unmatched[]; 141 extern const char e_endoffile[]; 142 extern const char e_newline[]; 143 144 /* odd chars */ 145 #define LBRACE '{' 146 #define RBRACE '}' 147 #define LPAREN '(' 148 #define RPAREN ')' 149 #define LBRACT '[' 150 #define RBRACT ']' 151 152 extern int sh_lex(Lex_t*); 153 extern Shnode_t *sh_dolparen(Lex_t*); 154 extern Lex_t *sh_lexopen(Lex_t*, Shell_t*, int); 155 extern void sh_lexskip(Lex_t*,int,int,int); 156 extern void sh_syntax(Lex_t*); 157 #if SHOPT_KIA 158 extern int kiaclose(Lex_t *); 159 extern unsigned long kiaentity(Lex_t*, const char*,int,int,int,int,unsigned long,int,int,const char*); 160 #endif /* SHOPT_KIA */ 161 162 163 #endif /* !NOTSYM */ 164