1 /* $OpenBSD: main.c,v 1.15 2008/10/06 20:38:33 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 20071023"; 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 break; 116 case 'd': 117 dbg = atoi(&argv[1][2]); 118 if (dbg == 0) 119 dbg = 1; 120 printf("awk %s\n", version); 121 break; 122 case 'V': /* added for exptools "standard" */ 123 printf("awk %s\n", version); 124 exit(0); 125 break; 126 default: 127 WARNING("unknown option %s ignored", argv[1]); 128 break; 129 } 130 argc--; 131 argv++; 132 } 133 /* argv[1] is now the first argument */ 134 if (npfile == 0) { /* no -f; first argument is program */ 135 if (argc <= 1) { 136 if (dbg) 137 exit(0); 138 FATAL("no program given"); 139 } 140 dprintf( ("program = |%s|\n", argv[1]) ); 141 lexprog = argv[1]; 142 argc--; 143 argv++; 144 } 145 recinit(recsize); 146 syminit(); 147 compile_time = 1; 148 argv[0] = cmdname; /* put prog name at front of arglist */ 149 dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) ); 150 arginit(argc, argv); 151 if (!safe) 152 envinit(environ); 153 yyparse(); 154 setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */ 155 if (fs) 156 *FS = qstring(fs, '\0'); 157 dprintf( ("errorflag=%d\n", errorflag) ); 158 if (errorflag == 0) { 159 compile_time = 0; 160 run(winner); 161 } else 162 bracecheck(); 163 return(errorflag); 164 } 165 166 int pgetc(void) /* get 1 character from awk program */ 167 { 168 int c; 169 170 for (;;) { 171 if (yyin == NULL) { 172 if (curpfile >= npfile) 173 return EOF; 174 if (strcmp(pfile[curpfile], "-") == 0) 175 yyin = stdin; 176 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) 177 FATAL("can't open file %s", pfile[curpfile]); 178 lineno = 1; 179 } 180 if ((c = getc(yyin)) != EOF) 181 return c; 182 if (yyin != stdin) 183 fclose(yyin); 184 yyin = NULL; 185 curpfile++; 186 } 187 } 188 189 char *cursource(void) /* current source file name */ 190 { 191 if (npfile > 0) 192 return pfile[curpfile]; 193 else 194 return NULL; 195 } 196