1 /* $OpenBSD: main.c,v 1.12 2002/12/19 21:24:28 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 20021213"; 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 #define MAX_PFILE 20 39 40 extern char **environ; 41 extern int nfields; 42 extern char *__progname; 43 44 int dbg = 0; 45 char *cmdname; /* gets argv[0] for error messages */ 46 extern FILE *yyin; /* lex input file */ 47 char *lexprog; /* points to program argument if it exists */ 48 extern int errorflag; /* non-zero if any syntax errors; set by yyerror */ 49 int compile_time = 2; /* for error printing: */ 50 /* 2 = cmdline, 1 = compile, 0 = running */ 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 64 cmdname = __progname; 65 if (argc == 1) { 66 fprintf(stderr, "usage: %s [-F fs] [-v var=value] [-safe] " 67 "[-mr n] [-mf n] [prog | -f progfile] file ...\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 pfile[npfile++] = argv[1]; 93 break; 94 case 'F': /* set field separator */ 95 if (argv[1][2] != 0) { /* arg is -Fsomething */ 96 if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */ 97 fs = "\t"; 98 else if (argv[1][2] != 0) 99 fs = &argv[1][2]; 100 } else { /* arg is -F something */ 101 argc--; argv++; 102 if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */ 103 fs = "\t"; 104 else if (argc > 1 && argv[1][0] != 0) 105 fs = &argv[1][0]; 106 } 107 if (fs == NULL || *fs == '\0') 108 WARNING("field separator FS is empty"); 109 break; 110 case 'v': /* -v a=1 to be done NOW. one -v for each */ 111 if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1])) 112 setclvar(argv[1]); 113 break; 114 case 'm': /* more memory: -mr=record, -mf=fields */ 115 /* no longer supported */ 116 WARNING("obsolete option %s ignored", argv[1]); 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 if (fs) 157 *FS = qstring(fs, '\0'); 158 dprintf( ("errorflag=%d\n", errorflag) ); 159 if (errorflag == 0) { 160 compile_time = 0; 161 run(winner); 162 } else 163 bracecheck(); 164 return(errorflag); 165 } 166 167 int pgetc(void) /* get 1 character from awk program */ 168 { 169 int c; 170 171 for (;;) { 172 if (yyin == NULL) { 173 if (curpfile >= npfile) 174 return EOF; 175 if (strcmp(pfile[curpfile], "-") == 0) 176 yyin = stdin; 177 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) 178 FATAL("can't open file %s", pfile[curpfile]); 179 lineno = 1; 180 } 181 if ((c = getc(yyin)) != EOF) 182 return c; 183 if (yyin != stdin) 184 fclose(yyin); 185 yyin = NULL; 186 curpfile++; 187 } 188 } 189 190 char *cursource(void) /* current source file name */ 191 { 192 if (npfile > 0) 193 return pfile[curpfile]; 194 else 195 return NULL; 196 } 197