main.c (5842B)
1 /* $OpenBSD: main.c,v 1.17 2011/09/28 19:27:18 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 20110810"; 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 Awkfloat srand_seed = 1; 44 char *cmdname; /* gets argv[0] for error messages */ 45 extern FILE *yyin; /* lex input file */ 46 char *lexprog; /* points to program argument if it exists */ 47 extern int errorflag; /* non-zero if any syntax errors; set by yyerror */ 48 int compile_time = 2; /* for error printing: */ 49 /* 2 = cmdline, 1 = compile, 0 = running */ 50 51 #define MAX_PFILE 20 /* max number of -f's */ 52 53 char *pfile[MAX_PFILE]; /* program filenames from -f's */ 54 int npfile = 0; /* number of filenames */ 55 int curpfile = 0; /* current filename */ 56 57 int safe = 0; /* 1 => "safe" mode */ 58 59 int main(int argc, char *argv[]) 60 { 61 const char *fs = NULL; 62 63 setlocale(LC_ALL, ""); 64 setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */ 65 cmdname = __progname; 66 if (argc == 1) { 67 fprintf(stderr, "usage: %s [-safe] [-V] [-d[n]] [-F fs] " 68 "[-v var=value] [prog | -f progfile]\n\tfile ...\n", 69 cmdname); 70 exit(1); 71 } 72 signal(SIGFPE, fpecatch); 73 74 yyin = NULL; 75 symtab = makesymtab(NSYMTAB); 76 while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') { 77 if (strcmp(argv[1], "--") == 0) { /* explicit end of args */ 78 argc--; 79 argv++; 80 break; 81 } 82 switch (argv[1][1]) { 83 case 's': 84 if (strcmp(argv[1], "-safe") == 0) 85 safe = 1; 86 break; 87 case 'f': /* next argument is program filename */ 88 if (argv[1][2] != 0) { /* arg is -fsomething */ 89 if (npfile >= MAX_PFILE - 1) 90 FATAL("too many -f options"); 91 pfile[npfile++] = &argv[1][2]; 92 } else { /* arg is -f something */ 93 argc--; argv++; 94 if (argc <= 1) 95 FATAL("no program filename"); 96 if (npfile >= MAX_PFILE - 1) 97 FATAL("too many -f options"); 98 pfile[npfile++] = argv[1]; 99 } 100 break; 101 case 'F': /* set field separator */ 102 if (argv[1][2] != 0) { /* arg is -Fsomething */ 103 if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */ 104 fs = "\t"; 105 else if (argv[1][2] != 0) 106 fs = &argv[1][2]; 107 } else { /* arg is -F something */ 108 argc--; argv++; 109 if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */ 110 fs = "\t"; 111 else if (argc > 1 && argv[1][0] != 0) 112 fs = &argv[1][0]; 113 } 114 if (fs == NULL || *fs == '\0') 115 WARNING("field separator FS is empty"); 116 break; 117 case 'v': /* -v a=1 to be done NOW. one -v for each */ 118 if (argv[1][2] != 0) { /* arg is -vsomething */ 119 if (isclvar(&argv[1][2])) 120 setclvar(&argv[1][2]); 121 else 122 FATAL("invalid -v option argument: %s", &argv[1][2]); 123 } else { /* arg is -v something */ 124 argc--; argv++; 125 if (argc <= 1) 126 FATAL("no variable name"); 127 if (isclvar(argv[1])) 128 setclvar(argv[1]); 129 else 130 FATAL("invalid -v option argument: %s", argv[1]); 131 } 132 break; 133 case 'd': 134 dbg = atoi(&argv[1][2]); 135 if (dbg == 0) 136 dbg = 1; 137 printf("awk %s\n", version); 138 break; 139 case 'V': /* added for exptools "standard" */ 140 printf("awk %s\n", version); 141 exit(0); 142 break; 143 default: 144 WARNING("unknown option %s ignored", argv[1]); 145 break; 146 } 147 argc--; 148 argv++; 149 } 150 /* argv[1] is now the first argument */ 151 if (npfile == 0) { /* no -f; first argument is program */ 152 if (argc <= 1) { 153 if (dbg) 154 exit(0); 155 FATAL("no program given"); 156 } 157 dprintf( ("program = |%s|\n", argv[1]) ); 158 lexprog = argv[1]; 159 argc--; 160 argv++; 161 } 162 recinit(recsize); 163 syminit(); 164 compile_time = 1; 165 argv[0] = cmdname; /* put prog name at front of arglist */ 166 dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) ); 167 arginit(argc, argv); 168 if (!safe) 169 envinit(environ); 170 yyparse(); 171 setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */ 172 if (fs) 173 *FS = qstring(fs, '\0'); 174 dprintf( ("errorflag=%d\n", errorflag) ); 175 if (errorflag == 0) { 176 compile_time = 0; 177 run(winner); 178 } else 179 bracecheck(); 180 return(errorflag); 181 } 182 183 int pgetc(void) /* get 1 character from awk program */ 184 { 185 int c; 186 187 for (;;) { 188 if (yyin == NULL) { 189 if (curpfile >= npfile) 190 return EOF; 191 if (strcmp(pfile[curpfile], "-") == 0) 192 yyin = stdin; 193 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) 194 FATAL("can't open file %s", pfile[curpfile]); 195 lineno = 1; 196 } 197 if ((c = getc(yyin)) != EOF) 198 return c; 199 if (yyin != stdin) 200 fclose(yyin); 201 yyin = NULL; 202 curpfile++; 203 } 204 } 205 206 char *cursource(void) /* current source file name */ 207 { 208 if (npfile > 0) 209 return pfile[curpfile]; 210 else 211 return NULL; 212 }