151 lines
3.8 KiB
C
Executable File
151 lines
3.8 KiB
C
Executable File
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)main.c 1.9 93/07/19 SMI" /* SVr4.0 2.12 */
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#define DEBUG
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#include <stdio.h>
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#include <ctype.h>
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#include <signal.h>
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#include <locale.h>
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#include <libintl.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <values.h>
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#include "awk.h"
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#include "y.tab.h"
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char *version = "version Oct 11, 1989";
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int dbg = 0;
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uchar *cmdname; /* gets argv[0] for error messages */
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extern FILE *yyin; /* lex input file */
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uchar *lexprog; /* points to program argument if it exists */
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extern int errorflag; /* non-zero if any syntax errors; set by yyerror */
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int compile_time = 2; /* for error printing: */
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/* 2 = cmdline, 1 = compile, 0 = running */
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uchar *pfile[20]; /* program filenames from -f's */
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int npfile = 0; /* number of filenames */
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int curpfile = 0; /* current filename */
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main(argc, argv, envp)
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int argc;
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uchar *argv[], *envp[];
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{
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uchar *fs = NULL;
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extern void fpecatch();
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(void) setlocale(LC_ALL,"");
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#if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
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#define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
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#endif
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(void) textdomain(TEXT_DOMAIN);
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cmdname = argv[0];
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if (argc == 1) {
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fprintf(stderr,
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gettext("Usage: %s [-f programfile | 'program'] [-Ffieldsep] [-v var=value] [files]\n"), cmdname);
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exit(1);
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}
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signal(SIGFPE, fpecatch);
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yyin = NULL;
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syminit();
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while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
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if (strcmp(argv[1], "--") == 0) { /* explicit end of args */
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argc--;
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argv++;
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break;
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}
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switch (argv[1][1]) {
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case 'f': /* next argument is program filename */
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argc--;
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argv++;
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if (argc <= 1)
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ERROR "no program filename" FATAL;
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pfile[npfile++] = argv[1];
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break;
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case 'F': /* set field separator */
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if (argv[1][2] != 0) { /* arg is -Fsomething */
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if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */
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fs = (uchar *) "\t";
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else if (argv[1][2] != 0)
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fs = &argv[1][2];
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} else { /* arg is -F something */
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argc--; argv++;
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if (argc > 1) {
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if (argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */
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fs = (uchar *) "\t";
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else if (argv[1][0] != 0)
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fs = &argv[1][0];
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}
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}
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if (fs == NULL || *fs == '\0')
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ERROR "field separator FS is empty" WARNING;
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break;
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case 'v': /* -v a=1 to be done NOW. one -v for each */
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if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1]))
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setclvar(argv[1]);
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break;
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case 'd':
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dbg = atoi(&argv[1][2]);
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if (dbg == 0)
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dbg = 1;
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printf("awk %s\n", version);
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break;
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default:
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ERROR "unknown option %s ignored", argv[1] WARNING;
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break;
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}
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argc--;
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argv++;
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}
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/* argv[1] is now the first argument */
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if (npfile == 0) { /* no -f; first argument is program */
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if (argc <= 1)
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ERROR "no program given" FATAL;
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dprintf( ("program = |%s|\n", argv[1]) );
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lexprog = argv[1];
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argc--;
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argv++;
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}
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compile_time = 1;
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argv[0] = cmdname; /* put prog name at front of arglist */
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dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) );
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arginit(argc, argv);
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envinit(envp);
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yyparse();
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if (fs)
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*FS = tostring(qstring(fs, '\0'));
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dprintf( ("errorflag=%d\n", errorflag) );
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if (errorflag == 0) {
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compile_time = 0;
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run(winner);
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} else
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bracecheck();
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exit(errorflag);
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}
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pgetc() /* get program character */
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{
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int c;
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for (;;) {
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if (yyin == NULL) {
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if (curpfile >= npfile)
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return EOF;
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yyin = (strcmp((char *) pfile[curpfile], "-") == 0) ? stdin : fopen((char *) pfile[curpfile], "r");
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if (yyin == NULL)
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ERROR "can't open file %s", pfile[curpfile] FATAL;
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}
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if ((c = getc(yyin)) != EOF)
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return c;
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yyin = NULL;
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curpfile++;
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}
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}
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