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 #include <sys/cdefs.h> 26 __FBSDID("$FreeBSD$"); 27 const char *version = "version 20190529 (FreeBSD)"; 28 29 #define DEBUG 30 #include <stdio.h> 31 #include <ctype.h> 32 #include <locale.h> 33 #include <stdlib.h> 34 #include <string.h> 35 #include <signal.h> 36 #include "awk.h" 37 #include "ytab.h" 38 39 extern char **environ; 40 extern int nfields; 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 /* Can this work with recursive calls? I don't think so. 60 void segvcatch(int n) 61 { 62 FATAL("segfault. Do you have an unbounded recursive call?", n); 63 } 64 */ 65 66 int main(int argc, char *argv[]) 67 { 68 const char *fs = NULL; 69 70 setlocale(LC_CTYPE, ""); 71 setlocale(LC_COLLATE, ""); 72 setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */ 73 cmdname = argv[0]; 74 if (argc == 1) { 75 fprintf(stderr, 76 "usage: %s [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]\n", 77 cmdname); 78 exit(1); 79 } 80 signal(SIGFPE, fpecatch); 81 /*signal(SIGSEGV, segvcatch); experiment */ 82 83 srand_seed = 1; 84 srandom((unsigned long) srand_seed); 85 86 yyin = NULL; 87 symtab = makesymtab(NSYMTAB/NSYMTAB); 88 while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') { 89 if (strcmp(argv[1],"-version") == 0 || strcmp(argv[1],"--version") == 0) { 90 printf("awk %s\n", version); 91 exit(0); 92 break; 93 } 94 if (strcmp(argv[1], "--") == 0) { /* explicit end of args */ 95 argc--; 96 argv++; 97 break; 98 } 99 switch (argv[1][1]) { 100 case 's': 101 if (strcmp(argv[1], "-safe") == 0) 102 safe = 1; 103 break; 104 case 'f': /* next argument is program filename */ 105 if (argv[1][2] != 0) { /* arg is -fsomething */ 106 if (npfile >= MAX_PFILE - 1) 107 FATAL("too many -f options"); 108 pfile[npfile++] = &argv[1][2]; 109 } else { /* arg is -f something */ 110 argc--; argv++; 111 if (argc <= 1) 112 FATAL("no program filename"); 113 if (npfile >= MAX_PFILE - 1) 114 FATAL("too many -f options"); 115 pfile[npfile++] = argv[1]; 116 } 117 break; 118 case 'F': /* set field separator */ 119 if (argv[1][2] != 0) { /* arg is -Fsomething */ 120 if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */ 121 fs = "\t"; 122 else if (argv[1][2] != 0) 123 fs = &argv[1][2]; 124 } else { /* arg is -F something */ 125 argc--; argv++; 126 if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */ 127 fs = "\t"; 128 else if (argc > 1 && argv[1][0] != 0) 129 fs = &argv[1][0]; 130 } 131 if (fs == NULL || *fs == '\0') 132 WARNING("field separator FS is empty"); 133 break; 134 case 'v': /* -v a=1 to be done NOW. one -v for each */ 135 if (argv[1][2] != 0) { /* arg is -vsomething */ 136 if (isclvar(&argv[1][2])) 137 setclvar(&argv[1][2]); 138 else 139 FATAL("invalid -v option argument: %s", &argv[1][2]); 140 } else { /* arg is -v something */ 141 argc--; argv++; 142 if (argc <= 1) 143 FATAL("no variable name"); 144 if (isclvar(argv[1])) 145 setclvar(argv[1]); 146 else 147 FATAL("invalid -v option argument: %s", argv[1]); 148 } 149 break; 150 case 'd': 151 dbg = atoi(&argv[1][2]); 152 if (dbg == 0) 153 dbg = 1; 154 printf("awk %s\n", version); 155 break; 156 default: 157 WARNING("unknown option %s ignored", argv[1]); 158 break; 159 } 160 argc--; 161 argv++; 162 } 163 /* argv[1] is now the first argument */ 164 if (npfile == 0) { /* no -f; first argument is program */ 165 if (argc <= 1) { 166 if (dbg) 167 exit(0); 168 FATAL("no program given"); 169 } 170 dprintf( ("program = |%s|\n", argv[1]) ); 171 lexprog = argv[1]; 172 argc--; 173 argv++; 174 } 175 recinit(recsize); 176 syminit(); 177 compile_time = 1; 178 argv[0] = cmdname; /* put prog name at front of arglist */ 179 dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) ); 180 arginit(argc, argv); 181 if (!safe) 182 envinit(environ); 183 yyparse(); 184 setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */ 185 if (fs) 186 *FS = qstring(fs, '\0'); 187 dprintf( ("errorflag=%d\n", errorflag) ); 188 if (errorflag == 0) { 189 compile_time = 0; 190 run(winner); 191 } else 192 bracecheck(); 193 return(errorflag); 194 } 195 196 int pgetc(void) /* get 1 character from awk program */ 197 { 198 int c; 199 200 for (;;) { 201 if (yyin == NULL) { 202 if (curpfile >= npfile) 203 return EOF; 204 if (strcmp(pfile[curpfile], "-") == 0) 205 yyin = stdin; 206 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) 207 FATAL("can't open file %s", pfile[curpfile]); 208 lineno = 1; 209 } 210 if ((c = getc(yyin)) != EOF) 211 return c; 212 if (yyin != stdin) 213 fclose(yyin); 214 yyin = NULL; 215 curpfile++; 216 } 217 } 218 219 char *cursource(void) /* current source file name */ 220 { 221 if (npfile > 0) 222 return pfile[curpfile]; 223 else 224 return NULL; 225 } 226