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 const char *version = "version 20070501"; 26 27 #define DEBUG 28 #include <stdio.h> 29 #include <ctype.h> 30 #include <locale.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <signal.h> 34 #include "awk.h" 35 #include "ytab.h" 36 37 extern char **environ; 38 extern int nfields; 39 40 int dbg = 0; 41 char *cmdname; /* gets argv[0] for error messages */ 42 extern FILE *yyin; /* lex input file */ 43 char *lexprog; /* points to program argument if it exists */ 44 extern int errorflag; /* non-zero if any syntax errors; set by yyerror */ 45 int compile_time = 2; /* for error printing: */ 46 /* 2 = cmdline, 1 = compile, 0 = running */ 47 48 #define MAX_PFILE 20 /* max number of -f's */ 49 50 char *pfile[MAX_PFILE]; /* program filenames from -f's */ 51 int npfile = 0; /* number of filenames */ 52 int curpfile = 0; /* current filename */ 53 54 int safe = 0; /* 1 => "safe" mode */ 55 56 int main(int argc, char *argv[]) 57 { 58 const char *fs = NULL; 59 60 setlocale(LC_CTYPE, ""); 61 setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */ 62 cmdname = argv[0]; 63 if (argc == 1) { 64 fprintf(stderr, 65 "usage: %s [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]\n", 66 cmdname); 67 exit(1); 68 } 69 signal(SIGFPE, fpecatch); 70 yyin = NULL; 71 symtab = makesymtab(NSYMTAB/NSYMTAB); 72 while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') { 73 if (strcmp(argv[1],"-version") == 0 || strcmp(argv[1],"--version") == 0) { 74 printf("awk %s\n", version); 75 exit(0); 76 break; 77 } 78 if (strncmp(argv[1], "--", 2) == 0) { /* explicit end of args */ 79 argc--; 80 argv++; 81 break; 82 } 83 switch (argv[1][1]) { 84 case 's': 85 if (strcmp(argv[1], "-safe") == 0) 86 safe = 1; 87 break; 88 case 'f': /* next argument is program filename */ 89 argc--; 90 argv++; 91 if (argc <= 1) 92 FATAL("no program filename"); 93 if (npfile >= MAX_PFILE - 1) 94 FATAL("too many -f options"); 95 pfile[npfile++] = argv[1]; 96 break; 97 case 'F': /* set field separator */ 98 if (argv[1][2] != 0) { /* arg is -Fsomething */ 99 if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */ 100 fs = "\t"; 101 else if (argv[1][2] != 0) 102 fs = &argv[1][2]; 103 } else { /* arg is -F something */ 104 argc--; argv++; 105 if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */ 106 fs = "\t"; 107 else if (argc > 1 && argv[1][0] != 0) 108 fs = &argv[1][0]; 109 } 110 if (fs == NULL || *fs == '\0') 111 WARNING("field separator FS is empty"); 112 break; 113 case 'v': /* -v a=1 to be done NOW. one -v for each */ 114 if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1])) 115 setclvar(argv[1]); 116 break; 117 case 'd': 118 dbg = atoi(&argv[1][2]); 119 if (dbg == 0) 120 dbg = 1; 121 printf("awk %s\n", version); 122 break; 123 default: 124 WARNING("unknown option %s ignored", argv[1]); 125 break; 126 } 127 argc--; 128 argv++; 129 } 130 /* argv[1] is now the first argument */ 131 if (npfile == 0) { /* no -f; first argument is program */ 132 if (argc <= 1) { 133 if (dbg) 134 exit(0); 135 FATAL("no program given"); 136 } 137 dprintf( ("program = |%s|\n", argv[1]) ); 138 lexprog = argv[1]; 139 argc--; 140 argv++; 141 } 142 recinit(recsize); 143 syminit(); 144 compile_time = 1; 145 argv[0] = cmdname; /* put prog name at front of arglist */ 146 dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) ); 147 arginit(argc, argv); 148 if (!safe) 149 envinit(environ); 150 yyparse(); 151 setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */ 152 if (fs) 153 *FS = qstring(fs, '\0'); 154 dprintf( ("errorflag=%d\n", errorflag) ); 155 if (errorflag == 0) { 156 compile_time = 0; 157 run(winner); 158 } else 159 bracecheck(); 160 return(errorflag); 161 } 162 163 int pgetc(void) /* get 1 character from awk program */ 164 { 165 int c; 166 167 for (;;) { 168 if (yyin == NULL) { 169 if (curpfile >= npfile) 170 return EOF; 171 if (strcmp(pfile[curpfile], "-") == 0) 172 yyin = stdin; 173 else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) 174 FATAL("can't open file %s", pfile[curpfile]); 175 lineno = 1; 176 } 177 if ((c = getc(yyin)) != EOF) 178 return c; 179 if (yyin != stdin) 180 fclose(yyin); 181 yyin = NULL; 182 curpfile++; 183 } 184 } 185 186 char *cursource(void) /* current source file name */ 187 { 188 if (npfile > 0) 189 return pfile[curpfile]; 190 else 191 return NULL; 192 } 193
