1 /**************************************************************** 2 Copyright (C) Lucent Technologies 1997 3 All Rights Reserved 4 5 Permission to use, copy, modify, and distribute this software and 6 its documentation for any purpose and without fee is hereby 7 granted, provided that the above copyright notice appear in all 8 copies and that both that the copyright notice and this 9 permission notice and warranty disclaimer appear in supporting 10 documentation, and that the name Lucent Technologies or any of 11 its entities not be used in advertising or publicity pertaining 12 to distribution of the software without specific, written prior 13 permission. 14 15 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 16 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 17 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 18 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 20 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 21 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 22 THIS SOFTWARE. 23 ****************************************************************/ 24 25 const char *version = "version 20050424"; 26 27 #define DEBUG 28 #include <stdio.h> 29 #include <ctype.h> 30 #include <locale.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <signal.h> 34 #include "awk.h" 35 #include "ytab.h" 36 37 extern char **environ; 38 extern int nfields; 39 40 int dbg = 0; 41 char *cmdname; /* gets argv[0] for error messages */ 42 extern FILE *yyin; /* lex input file */ 43 char *lexprog; /* points to program argument if it exists */ 44 extern int errorflag; /* non-zero if any syntax errors; set by yyerror */ 45 int compile_time = 2; /* for error printing: */ 46 /* 2 = cmdline, 1 = compile, 0 = running */ 47 48 #define MAX_PFILE 20 /* max number of -f's */ 49 50 char *pfile[MAX_PFILE]; /* program filenames from -f's */ 51 int npfile = 0; /* number of filenames */ 52 int curpfile = 0; /* current filename */ 53 54 int safe = 0; /* 1 => "safe" mode */ 55 56 int main(int argc, char *argv[]) 57 { 58 const char *fs = NULL; 59 60 setlocale(LC_CTYPE, ""); 61 setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */ 62 cmdname = argv[0]; 63 if (argc == 1) { 64 fprintf(stderr, "Usage: %s [-f programfile | 'program'] [-Ffieldsep] [-v var=value] [files]\n", cmdname); 65 exit(1); 66 } 67 signal(SIGFPE, fpecatch); 68 yyin = NULL; 69 symtab = makesymtab(NSYMTAB); 70 while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') { 71 if (strcmp(argv[1], "--") == 0) { /* explicit end of args */ 72 argc--; 73 argv++; 74 break; 75 } 76 switch (argv[1][1]) { 77 case 's': 78 if (strcmp(argv[1], "-safe") == 0) 79 safe = 1; 80 break; 81 case 'f': /* next argument is program filename */ 82 argc--; 83 argv++; 84 if (argc <= 1) 85 FATAL("no program filename"); 86 if (npfile >= MAX_PFILE - 1) 87 FATAL("too many -f options"); 88 pfile[npfile++] = argv[1]; 89 break; 90 case 'F': /* set field separator */ 91 if (argv[1][2] != 0) { /* arg is -Fsomething */ 92 if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */ 93 fs = "\t"; 94 else if (argv[1][2] != 0) 95 fs = &argv[1][2]; 96 } else { /* arg is -F something */ 97 argc--; argv++; 98 if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */ 99 fs = "\t"; 100 else if (argc > 1 && argv[1][0] != 0) 101 fs = &argv[1][0]; 102 } 103 if (fs == NULL || *fs == '\0') 104 WARNING("field separator FS is empty"); 105 break; 106 case 'v': /* -v a=1 to be done NOW. one -v for each */ 107 if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1])) 108 setclvar(argv[1]); 109 break; 110 case 'm': /* more memory: -mr=record, -mf=fields */ 111 /* no longer supported */ 112 WARNING("obsolete option %s ignored", argv[1]); 113 break; 114 case 'd': 115 dbg = atoi(&argv[1][2]); 116 if (dbg == 0) 117 dbg = 1; 118 printf("awk %s\n", version); 119 break; 120 case 'V': /* added for exptools "standard" */ 121 printf("awk %s\n", version); 122 exit(0); 123 break; 124 default: 125 WARNING("unknown option %s ignored", argv[1]); 126 break; 127 } 128 argc--; 129 argv++; 130 } 131 /* argv[1] is now the first argument */ 132 if (npfile == 0) { /* no -f; first argument is program */ 133 if (argc <= 1) { 134 if (dbg) 135 exit(0); 136 FATAL("no program given"); 137 } 138 dprintf( ("program = |%s|\n", argv[1]) ); 139 lexprog = argv[1]; 140 argc--; 141 argv++; 142 } 143 recinit(recsize); 144 syminit(); 145 compile_time = 1; 146 argv[0] = cmdname; /* put prog name at front of arglist */ 147 dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) ); 148 arginit(argc, argv); 149 if (!safe) 150 envinit(environ); 151 yyparse(); 152 setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */ 153 if (fs) 154 *FS = qstring(fs, '\0'); 155 dprintf( ("errorflag=%d\n", errorflag) ); 156 if (errorflag == 0) { 157 compile_time = 0; 158 run(winner); 159 } else 160 bracecheck(); 161 return(errorflag); 162 } 163 164 int pgetc(void) /* get 1 character from awk program */ 165 { 166 int c; 167 168 for (;;) { 169 if (yyin == NULL) { 170 if (curpfile >= npfile) 171 return EOF; 172 if (strcmp(pfile[curpfile], "-") == 0) 173 yyin = stdin; 174 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) 175 FATAL("can't open file %s", pfile[curpfile]); 176 lineno = 1; 177 } 178 if ((c = getc(yyin)) != EOF) 179 return c; 180 if (yyin != stdin) 181 fclose(yyin); 182 yyin = NULL; 183 curpfile++; 184 } 185 } 186 187 char *cursource(void) /* current source file name */ 188 { 189 if (npfile > 0) 190 return pfile[curpfile]; 191 else 192 return NULL; 193 } 194