Annotation of src/usr.bin/awk/main.c, Revision 1.10
1.10 ! aaron 1: /* $OpenBSD: main.c,v 1.9 1999/12/08 23:09:45 millert Exp $ */
1.1 tholo 2: /****************************************************************
1.4 kstailey 3: Copyright (C) Lucent Technologies 1997
1.1 tholo 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
1.4 kstailey 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.
1.1 tholo 24: ****************************************************************/
25:
1.9 millert 26: char *version = "version 19990620";
1.1 tholo 27:
28: #define DEBUG
29: #include <stdio.h>
30: #include <ctype.h>
1.3 millert 31: #include <locale.h>
1.1 tholo 32: #include <stdlib.h>
33: #include <string.h>
34: #include <signal.h>
35: #include "awk.h"
1.4 kstailey 36: #include "ytab.h"
1.1 tholo 37:
1.8 millert 38: #define MAX_PFILE 20
39:
1.1 tholo 40: extern char **environ;
41: extern int nfields;
1.6 millert 42: extern char *__progname;
1.1 tholo 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:
1.8 millert 52: char *pfile[MAX_PFILE]; /* program filenames from -f's */
1.1 tholo 53: int npfile = 0; /* number of filenames */
54: int curpfile = 0; /* current filename */
55:
1.4 kstailey 56: int safe = 0; /* 1 => "safe" mode */
57:
1.1 tholo 58: int main(int argc, char *argv[])
59: {
60: char *fs = NULL, *marg;
61: int temp;
1.2 tholo 62:
63: setlocale(LC_ALL, "");
1.1 tholo 64:
1.6 millert 65: cmdname = __progname;
1.1 tholo 66: if (argc == 1) {
1.10 ! aaron 67: fprintf(stderr, "usage: %s [-F fs] [-v var=value] [-safe] "
! 68: "[-mr n] [-mf n] [prog | -f progfile] file ...\n",
! 69: cmdname);
1.1 tholo 70: exit(1);
71: }
72: signal(SIGFPE, fpecatch);
73: yyin = NULL;
74: symtab = makesymtab(NSYMTAB);
75: while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
1.4 kstailey 76: if (strcmp(argv[1], "--") == 0) { /* explicit end of args */
1.1 tholo 77: argc--;
78: argv++;
79: break;
80: }
81: switch (argv[1][1]) {
1.4 kstailey 82: case 's':
83: if (strcmp(argv[1], "-safe") == 0)
84: safe = 1;
85: break;
1.1 tholo 86: case 'f': /* next argument is program filename */
87: argc--;
88: argv++;
1.8 millert 89: if (npfile >= MAX_PFILE - 1)
1.9 millert 90: FATAL("too many -f options");
1.1 tholo 91: if (argc <= 1)
1.9 millert 92: FATAL("no program filename");
1.1 tholo 93: pfile[npfile++] = argv[1];
94: break;
95: case 'F': /* set field separator */
96: if (argv[1][2] != 0) { /* arg is -Fsomething */
97: if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */
1.4 kstailey 98: fs = "\t";
1.1 tholo 99: else if (argv[1][2] != 0)
100: fs = &argv[1][2];
101: } else { /* arg is -F something */
102: argc--; argv++;
103: if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */
1.4 kstailey 104: fs = "\t";
1.1 tholo 105: else if (argc > 1 && argv[1][0] != 0)
106: fs = &argv[1][0];
107: }
108: if (fs == NULL || *fs == '\0')
1.9 millert 109: WARNING("field separator FS is empty");
1.1 tholo 110: break;
111: case 'v': /* -v a=1 to be done NOW. one -v for each */
112: if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1]))
113: setclvar(argv[1]);
114: break;
115: case 'm': /* more memory: -mr=record, -mf=fields */
1.4 kstailey 116: /* no longer needed */
1.1 tholo 117: marg = argv[1];
118: if (argv[1][3])
119: temp = atoi(&argv[1][3]);
120: else {
121: argv++; argc--;
122: temp = atoi(&argv[1][0]);
123: }
124: switch (marg[2]) {
125: case 'r': recsize = temp; break;
126: case 'f': nfields = temp; break;
1.9 millert 127: default: FATAL("unknown option %s\n", marg);
1.1 tholo 128: }
129: break;
130: case 'd':
131: dbg = atoi(&argv[1][2]);
132: if (dbg == 0)
133: dbg = 1;
134: printf("awk %s\n", version);
1.6 millert 135: break;
136: case 'V': /* added for exptools "standard" */
137: printf("awk %s\n", version);
138: exit(0);
1.1 tholo 139: break;
140: default:
1.9 millert 141: WARNING("unknown option %s ignored", argv[1]);
1.1 tholo 142: break;
143: }
144: argc--;
145: argv++;
146: }
147: /* argv[1] is now the first argument */
148: if (npfile == 0) { /* no -f; first argument is program */
149: if (argc <= 1) {
150: if (dbg)
151: exit(0);
1.9 millert 152: FATAL("no program given");
1.1 tholo 153: }
1.4 kstailey 154: dprintf( ("program = |%s|\n", argv[1]) );
1.1 tholo 155: lexprog = argv[1];
156: argc--;
157: argv++;
158: }
159: recinit(recsize);
160: syminit();
161: compile_time = 1;
162: argv[0] = cmdname; /* put prog name at front of arglist */
1.4 kstailey 163: dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) );
1.1 tholo 164: arginit(argc, argv);
1.4 kstailey 165: if (!safe)
166: envinit(environ);
1.1 tholo 167: yyparse();
168: if (fs)
1.4 kstailey 169: *FS = qstring(fs, '\0');
170: dprintf( ("errorflag=%d\n", errorflag) );
1.1 tholo 171: if (errorflag == 0) {
172: compile_time = 0;
173: run(winner);
174: } else
175: bracecheck();
176: return(errorflag);
177: }
178:
179: int pgetc(void) /* get 1 character from awk program */
180: {
181: int c;
182:
183: for (;;) {
184: if (yyin == NULL) {
185: if (curpfile >= npfile)
186: return EOF;
1.4 kstailey 187: if (strcmp(pfile[curpfile], "-") == 0)
1.1 tholo 188: yyin = stdin;
1.4 kstailey 189: else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
1.9 millert 190: FATAL("can't open file %s", pfile[curpfile]);
1.7 millert 191: lineno = 1;
1.1 tholo 192: }
193: if ((c = getc(yyin)) != EOF)
194: return c;
195: if (yyin != stdin)
196: fclose(yyin);
197: yyin = NULL;
198: curpfile++;
199: }
1.7 millert 200: }
201:
202: char *cursource(void) /* current source file name */
203: {
204: if (npfile > 0)
205: return pfile[curpfile];
206: else
207: return NULL;
1.1 tholo 208: }
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