1 /* $OpenBSD: main.c,v 1.16 2010/06/13 17:58:19 millert Exp $ */ 2 /**************************************************************** 3 Copyright (C) Lucent Technologies 1997 4 All Rights Reserved 5 6 Permission to use, copy, modify, and distribute this software and 7 its documentation for any purpose and without fee is hereby 8 granted, provided that the above copyright notice appear in all 9 copies and that both that the copyright notice and this 10 permission notice and warranty disclaimer appear in supporting 11 documentation, and that the name Lucent Technologies or any of 12 its entities not be used in advertising or publicity pertaining 13 to distribution of the software without specific, written prior 14 permission. 15 16 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 17 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 18 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 19 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 21 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 22 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 23 THIS SOFTWARE. 24 ****************************************************************/ 25 26 const char *version = "version 20100523"; 27 28 #define DEBUG 29 #include <stdio.h> 30 #include <ctype.h> 31 #include <locale.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <signal.h> 35 #include "awk.h" 36 #include "ytab.h" 37 38 extern char **environ; 39 extern int nfields; 40 extern char *__progname; 41 42 int dbg = 0; 43 char *cmdname; /* gets argv[0] for error messages */ 44 extern FILE *yyin; /* lex input file */ 45 char *lexprog; /* points to program argument if it exists */ 46 extern int errorflag; /* non-zero if any syntax errors; set by yyerror */ 47 int compile_time = 2; /* for error printing: */ 48 /* 2 = cmdline, 1 = compile, 0 = running */ 49 50 #define MAX_PFILE 20 /* max number of -f's */ 51 52 char *pfile[MAX_PFILE]; /* program filenames from -f's */ 53 int npfile = 0; /* number of filenames */ 54 int curpfile = 0; /* current filename */ 55 56 int safe = 0; /* 1 => "safe" mode */ 57 58 int main(int argc, char *argv[]) 59 { 60 const char *fs = NULL; 61 62 setlocale(LC_ALL, ""); 63 setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */ 64 cmdname = __progname; 65 if (argc == 1) { 66 fprintf(stderr, "usage: %s [-safe] [-V] [-d[n]] [-F fs] " 67 "[-v var=value] [prog | -f progfile]\n\tfile ...\n", 68 cmdname); 69 exit(1); 70 } 71 signal(SIGFPE, fpecatch); 72 yyin = NULL; 73 symtab = makesymtab(NSYMTAB); 74 while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') { 75 if (strcmp(argv[1], "--") == 0) { /* explicit end of args */ 76 argc--; 77 argv++; 78 break; 79 } 80 switch (argv[1][1]) { 81 case 's': 82 if (strcmp(argv[1], "-safe") == 0) 83 safe = 1; 84 break; 85 case 'f': /* next argument is program filename */ 86 argc--; 87 argv++; 88 if (npfile >= MAX_PFILE - 1) 89 FATAL("too many -f options"); 90 if (argc <= 1) 91 FATAL("no program filename"); 92 if (npfile >= MAX_PFILE - 1) 93 FATAL("too many -f options"); 94 pfile[npfile++] = argv[1]; 95 break; 96 case 'F': /* set field separator */ 97 if (argv[1][2] != 0) { /* arg is -Fsomething */ 98 if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */ 99 fs = "\t"; 100 else if (argv[1][2] != 0) 101 fs = &argv[1][2]; 102 } else { /* arg is -F something */ 103 argc--; argv++; 104 if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */ 105 fs = "\t"; 106 else if (argc > 1 && argv[1][0] != 0) 107 fs = &argv[1][0]; 108 } 109 if (fs == NULL || *fs == '\0') 110 WARNING("field separator FS is empty"); 111 break; 112 case 'v': /* -v a=1 to be done NOW. one -v for each */ 113 if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1])) 114 setclvar(argv[1]); 115 else if (argv[1][2] != '\0') 116 setclvar(&argv[1][2]); 117 break; 118 case 'd': 119 dbg = atoi(&argv[1][2]); 120 if (dbg == 0) 121 dbg = 1; 122 printf("awk %s\n", version); 123 break; 124 case 'V': /* added for exptools "standard" */ 125 printf("awk %s\n", version); 126 exit(0); 127 break; 128 default: 129 WARNING("unknown option %s ignored", argv[1]); 130 break; 131 } 132 argc--; 133 argv++; 134 } 135 /* argv[1] is now the first argument */ 136 if (npfile == 0) { /* no -f; first argument is program */ 137 if (argc <= 1) { 138 if (dbg) 139 exit(0); 140 FATAL("no program given"); 141 } 142 dprintf( ("program = |%s|\n", argv[1]) ); 143 lexprog = argv[1]; 144 argc--; 145 argv++; 146 } 147 recinit(recsize); 148 syminit(); 149 compile_time = 1; 150 argv[0] = cmdname; /* put prog name at front of arglist */ 151 dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) ); 152 arginit(argc, argv); 153 if (!safe) 154 envinit(environ); 155 yyparse(); 156 setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */ 157 if (fs) 158 *FS = qstring(fs, '\0'); 159 dprintf( ("errorflag=%d\n", errorflag) ); 160 if (errorflag == 0) { 161 compile_time = 0; 162 run(winner); 163 } else 164 bracecheck(); 165 return(errorflag); 166 } 167 168 int pgetc(void) /* get 1 character from awk program */ 169 { 170 int c; 171 172 for (;;) { 173 if (yyin == NULL) { 174 if (curpfile >= npfile) 175 return EOF; 176 if (strcmp(pfile[curpfile], "-") == 0) 177 yyin = stdin; 178 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) 179 FATAL("can't open file %s", pfile[curpfile]); 180 lineno = 1; 181 } 182 if ((c = getc(yyin)) != EOF) 183 return c; 184 if (yyin != stdin) 185 fclose(yyin); 186 yyin = NULL; 187 curpfile++; 188 } 189 } 190 191 char *cursource(void) /* current source file name */ 192 { 193 if (npfile > 0) 194 return pfile[curpfile]; 195 else 196 return NULL; 197 } 198