1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1982-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * David Korn <dgk@research.att.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 struct shlex_t 35 { 36 Shell_t *sh; /* pointer to the interpreter */ 37 struct argnod *arg; /* current word */ 38 struct ionod *heredoc; /* pending here document list */ 39 int token; /* current token number */ 40 int lastline; /* last line number */ 41 int lasttok; /* previous token number */ 42 int digits; /* numerical value with word token */ 43 char aliasok; /* on when alias is legal */ 44 char assignok; /* on when name=value is legal */ 45 int inlineno; /* saved value of sh.inlineno */ 46 int firstline; /* saved value of sh.st.firstline */ 47 int comsub; /* parsing command substitution */ 48 #if SHOPT_KIA 49 Sfio_t *kiafile; /* kia output file */ 50 Sfio_t *kiatmp; /* kia reference file */ 51 unsigned long script; /* script entity number */ 52 unsigned long fscript; /* script file entity number */ 53 unsigned long current; /* current entity number */ 54 unsigned long unknown; /* <unknown> entity number */ 55 off_t kiabegin; /* offset of first entry */ 56 char *scriptname; /* name of script file */ 57 Dt_t *entity_tree; /* for entity ids */ 58 #endif /* SHOPT_KIA */ 59 }; 60 61 /* symbols for parsing */ 62 #define NL '\n' 63 #define NOTSYM '!' 64 #define SYMRES 0400 /* reserved word symbols */ 65 #define DOSYM (SYMRES|01) 66 #define FISYM (SYMRES|02) 67 #define ELIFSYM (SYMRES|03) 68 #define ELSESYM (SYMRES|04) 69 #define INSYM (SYMRES|05) 70 #define THENSYM (SYMRES|06) 71 #define DONESYM (SYMRES|07) 72 #define ESACSYM (SYMRES|010) 73 #define IFSYM (SYMRES|011) 74 #define FORSYM (SYMRES|012) 75 #define WHILESYM (SYMRES|013) 76 #define UNTILSYM (SYMRES|014) 77 #define CASESYM (SYMRES|015) 78 #define FUNCTSYM (SYMRES|016) 79 #define SELECTSYM (SYMRES|017) 80 #define TIMESYM (SYMRES|020) 81 #define NSPACESYM (SYMRES|021) 82 83 #define SYMREP 01000 /* symbols for doubled characters */ 84 #define BREAKCASESYM (SYMREP|';') 85 #define ANDFSYM (SYMREP|'&') 86 #define ORFSYM (SYMREP|'|') 87 #define IOAPPSYM (SYMREP|'>') 88 #define IODOCSYM (SYMREP|'<') 89 #define EXPRSYM (SYMREP|'(') 90 #define BTESTSYM (SYMREP|'[') 91 #define ETESTSYM (SYMREP|']') 92 93 #define SYMMASK 0170000 94 #define SYMPIPE 010000 /* trailing '|' */ 95 #define SYMLPAR 020000 /* trailing LPAREN */ 96 #define SYMAMP 040000 /* trailing '&' */ 97 #define SYMGT 0100000 /* trailing '>' */ 98 #define SYMSEMI 0110000 /* trailing ';' */ 99 #define SYMSHARP 0120000 /* trailing '#' */ 100 #define IOSEEKSYM (SYMSHARP|'<') 101 #define IOMOV0SYM (SYMAMP|'<') 102 #define IOMOV1SYM (SYMAMP|'>') 103 #define FALLTHRUSYM (SYMAMP|';') 104 #define COOPSYM (SYMAMP|'|') 105 #define IORDWRSYM (SYMGT|'<') 106 #define IOCLOBSYM (SYMPIPE|'>') 107 #define IPROCSYM (SYMLPAR|'<') 108 #define OPROCSYM (SYMLPAR|'>') 109 #define EOFSYM 04000 /* end-of-file */ 110 #define TESTUNOP 04001 111 #define TESTBINOP 04002 112 #define LABLSYM 04003 113 #define IOVNAME 04004 114 115 /* additional parser flag, others in <shell.h> */ 116 #define SH_EMPTY 04 117 #define SH_NOIO 010 118 #define SH_ASSIGN 020 119 #define SH_FUNDEF 040 120 #define SH_ARRAY 0100 121 #define SH_SEMI 0200 /* semi-colon after NL ok */ 122 123 #define SH_COMPASSIGN 010 /* allow compound assignments only */ 124 125 typedef struct _shlex_ 126 { 127 struct shlex_t _shlex; 128 #ifdef _SHLEX_PRIVATE 129 _SHLEX_PRIVATE 130 #endif 131 } Lex_t; 132 133 #define shlex (((Lex_t*)(sh.lex_context))->_shlex) 134 extern const char e_unexpected[]; 135 extern const char e_unmatched[]; 136 extern const char e_endoffile[]; 137 extern const char e_newline[]; 138 139 /* odd chars */ 140 #define LBRACE '{' 141 #define RBRACE '}' 142 #define LPAREN '(' 143 #define RPAREN ')' 144 #define LBRACT '[' 145 #define RBRACT ']' 146 147 extern int sh_lex(); 148 extern Lex_t *sh_lexopen(Lex_t*, Shell_t*, int); 149 extern void sh_lexskip(int,int,int); 150 extern void sh_syntax(void); 151 152 #endif /* !NOTSYM */ 153