Elliott Hughes | 5e21e41 | 2017-11-16 14:48:27 -0800 | [diff] [blame] | 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 20121220"; |
| 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 | Awkfloat srand_seed = 1; |
| 42 | char *cmdname; /* gets argv[0] for error messages */ |
| 43 | extern FILE *yyin; /* lex input file */ |
| 44 | char *lexprog; /* points to program argument if it exists */ |
| 45 | extern int errorflag; /* non-zero if any syntax errors; set by yyerror */ |
| 46 | int compile_time = 2; /* for error printing: */ |
| 47 | /* 2 = cmdline, 1 = compile, 0 = running */ |
| 48 | |
| 49 | #define MAX_PFILE 20 /* max number of -f's */ |
| 50 | |
| 51 | char *pfile[MAX_PFILE]; /* program filenames from -f's */ |
| 52 | int npfile = 0; /* number of filenames */ |
| 53 | int curpfile = 0; /* current filename */ |
| 54 | |
| 55 | int safe = 0; /* 1 => "safe" mode */ |
| 56 | |
| 57 | int main(int argc, char *argv[]) |
| 58 | { |
| 59 | const char *fs = NULL; |
| 60 | |
| 61 | setlocale(LC_CTYPE, ""); |
| 62 | setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */ |
| 63 | cmdname = argv[0]; |
| 64 | if (argc == 1) { |
| 65 | fprintf(stderr, |
| 66 | "usage: %s [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]\n", |
| 67 | cmdname); |
| 68 | exit(1); |
| 69 | } |
| 70 | signal(SIGFPE, fpecatch); |
| 71 | |
| 72 | srand_seed = 1; |
| 73 | srand(srand_seed); |
| 74 | |
| 75 | yyin = NULL; |
| 76 | symtab = makesymtab(NSYMTAB/NSYMTAB); |
| 77 | while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') { |
| 78 | if (strcmp(argv[1],"-version") == 0 || strcmp(argv[1],"--version") == 0) { |
| 79 | printf("awk %s\n", version); |
| 80 | exit(0); |
| 81 | break; |
| 82 | } |
| 83 | if (strncmp(argv[1], "--", 2) == 0) { /* explicit end of args */ |
| 84 | argc--; |
| 85 | argv++; |
| 86 | break; |
| 87 | } |
| 88 | switch (argv[1][1]) { |
| 89 | case 's': |
| 90 | if (strcmp(argv[1], "-safe") == 0) |
| 91 | safe = 1; |
| 92 | break; |
| 93 | case 'f': /* next argument is program filename */ |
| 94 | if (argv[1][2] != 0) { /* arg is -fsomething */ |
| 95 | if (npfile >= MAX_PFILE - 1) |
| 96 | FATAL("too many -f options"); |
| 97 | pfile[npfile++] = &argv[1][2]; |
| 98 | } else { /* arg is -f something */ |
| 99 | argc--; argv++; |
| 100 | if (argc <= 1) |
| 101 | FATAL("no program filename"); |
| 102 | if (npfile >= MAX_PFILE - 1) |
| 103 | FATAL("too many -f options"); |
| 104 | pfile[npfile++] = argv[1]; |
| 105 | } |
| 106 | break; |
| 107 | case 'F': /* set field separator */ |
| 108 | if (argv[1][2] != 0) { /* arg is -Fsomething */ |
| 109 | if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */ |
| 110 | fs = "\t"; |
| 111 | else if (argv[1][2] != 0) |
| 112 | fs = &argv[1][2]; |
| 113 | } else { /* arg is -F something */ |
| 114 | argc--; argv++; |
| 115 | if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */ |
| 116 | fs = "\t"; |
| 117 | else if (argc > 1 && argv[1][0] != 0) |
| 118 | fs = &argv[1][0]; |
| 119 | } |
| 120 | if (fs == NULL || *fs == '\0') |
| 121 | WARNING("field separator FS is empty"); |
| 122 | break; |
| 123 | case 'v': /* -v a=1 to be done NOW. one -v for each */ |
| 124 | if (argv[1][2] != 0) { /* arg is -vsomething */ |
| 125 | if (isclvar(&argv[1][2])) |
| 126 | setclvar(&argv[1][2]); |
| 127 | else |
| 128 | FATAL("invalid -v option argument: %s", &argv[1][2]); |
| 129 | } else { /* arg is -v something */ |
| 130 | argc--; argv++; |
| 131 | if (argc <= 1) |
| 132 | FATAL("no variable name"); |
| 133 | if (isclvar(argv[1])) |
| 134 | setclvar(argv[1]); |
| 135 | else |
| 136 | FATAL("invalid -v option argument: %s", argv[1]); |
| 137 | } |
| 138 | break; |
| 139 | case 'd': |
| 140 | dbg = atoi(&argv[1][2]); |
| 141 | if (dbg == 0) |
| 142 | dbg = 1; |
| 143 | printf("awk %s\n", version); |
| 144 | break; |
| 145 | default: |
| 146 | WARNING("unknown option %s ignored", argv[1]); |
| 147 | break; |
| 148 | } |
| 149 | argc--; |
| 150 | argv++; |
| 151 | } |
| 152 | /* argv[1] is now the first argument */ |
| 153 | if (npfile == 0) { /* no -f; first argument is program */ |
| 154 | if (argc <= 1) { |
| 155 | if (dbg) |
| 156 | exit(0); |
| 157 | FATAL("no program given"); |
| 158 | } |
| 159 | dprintf( ("program = |%s|\n", argv[1]) ); |
| 160 | lexprog = argv[1]; |
| 161 | argc--; |
| 162 | argv++; |
| 163 | } |
| 164 | recinit(recsize); |
| 165 | syminit(); |
| 166 | compile_time = 1; |
| 167 | argv[0] = cmdname; /* put prog name at front of arglist */ |
| 168 | dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) ); |
| 169 | arginit(argc, argv); |
| 170 | if (!safe) |
| 171 | envinit(environ); |
| 172 | yyparse(); |
| 173 | setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */ |
| 174 | if (fs) |
| 175 | *FS = qstring(fs, '\0'); |
| 176 | dprintf( ("errorflag=%d\n", errorflag) ); |
| 177 | if (errorflag == 0) { |
| 178 | compile_time = 0; |
| 179 | run(winner); |
| 180 | } else |
| 181 | bracecheck(); |
| 182 | return(errorflag); |
| 183 | } |
| 184 | |
| 185 | int pgetc(void) /* get 1 character from awk program */ |
| 186 | { |
| 187 | int c; |
| 188 | |
| 189 | for (;;) { |
| 190 | if (yyin == NULL) { |
| 191 | if (curpfile >= npfile) |
| 192 | return EOF; |
| 193 | if (strcmp(pfile[curpfile], "-") == 0) |
| 194 | yyin = stdin; |
| 195 | else if ((yyin = fopen(pfile[curpfile], "r")) == NULL) |
| 196 | FATAL("can't open file %s", pfile[curpfile]); |
| 197 | lineno = 1; |
| 198 | } |
| 199 | if ((c = getc(yyin)) != EOF) |
| 200 | return c; |
| 201 | if (yyin != stdin) |
| 202 | fclose(yyin); |
| 203 | yyin = NULL; |
| 204 | curpfile++; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | char *cursource(void) /* current source file name */ |
| 209 | { |
| 210 | if (npfile > 0) |
| 211 | return pfile[curpfile]; |
| 212 | else |
| 213 | return NULL; |
| 214 | } |