0e43d315b9
Note: this backs out a number of changes we've made to awk because they aren't upstream, but are on the vendor branch. Those will be reapplied. svn makes it needlessly difficult to know which ones, but at least r315426, r301289, and maybe r301691, though there may be others too. None of these are critical, so bisecting through this point is safe for all but awk regression tests :).
226 lines
6.0 KiB
C
226 lines
6.0 KiB
C
/****************************************************************
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Copyright (C) Lucent Technologies 1997
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name Lucent Technologies or any of
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its entities not be used in advertising or publicity pertaining
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to distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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const char *version = "version 20190529 (FreeBSD)";
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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 <locale.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include "awk.h"
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#include "ytab.h"
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extern char **environ;
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extern int nfields;
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int dbg = 0;
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Awkfloat srand_seed = 1;
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char *cmdname; /* gets argv[0] for error messages */
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extern FILE *yyin; /* lex input file */
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char *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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#define MAX_PFILE 20 /* max number of -f's */
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char *pfile[MAX_PFILE]; /* 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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int safe = 0; /* 1 => "safe" mode */
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/* Can this work with recursive calls? I don't think so.
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void segvcatch(int n)
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{
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FATAL("segfault. Do you have an unbounded recursive call?", n);
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}
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*/
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int main(int argc, char *argv[])
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{
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const char *fs = NULL;
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setlocale(LC_CTYPE, "");
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setlocale(LC_COLLATE, "");
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setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */
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cmdname = argv[0];
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if (argc == 1) {
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fprintf(stderr,
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"usage: %s [-F fs] [-v var=value] [-f progfile | 'prog'] [file ...]\n",
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cmdname);
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exit(1);
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}
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signal(SIGFPE, fpecatch);
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/*signal(SIGSEGV, segvcatch); experiment */
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srand_seed = 1;
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srandom((unsigned long) srand_seed);
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yyin = NULL;
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symtab = makesymtab(NSYMTAB/NSYMTAB);
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while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
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if (strcmp(argv[1],"-version") == 0 || strcmp(argv[1],"--version") == 0) {
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printf("awk %s\n", version);
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exit(0);
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break;
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}
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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 's':
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if (strcmp(argv[1], "-safe") == 0)
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safe = 1;
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break;
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case 'f': /* next argument is program filename */
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if (argv[1][2] != 0) { /* arg is -fsomething */
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if (npfile >= MAX_PFILE - 1)
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FATAL("too many -f options");
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pfile[npfile++] = &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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FATAL("no program filename");
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if (npfile >= MAX_PFILE - 1)
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FATAL("too many -f options");
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pfile[npfile++] = argv[1];
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}
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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 = "\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 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */
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fs = "\t";
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else if (argc > 1 && argv[1][0] != 0)
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fs = &argv[1][0];
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}
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if (fs == NULL || *fs == '\0')
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WARNING("field separator FS is empty");
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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) { /* arg is -vsomething */
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if (isclvar(&argv[1][2]))
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setclvar(&argv[1][2]);
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else
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FATAL("invalid -v option argument: %s", &argv[1][2]);
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} else { /* arg is -v something */
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argc--; argv++;
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if (argc <= 1)
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FATAL("no variable name");
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if (isclvar(argv[1]))
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setclvar(argv[1]);
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else
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FATAL("invalid -v option argument: %s", argv[1]);
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}
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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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WARNING("unknown option %s ignored", argv[1]);
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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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if (dbg)
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exit(0);
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FATAL("no program given");
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}
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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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recinit(recsize);
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syminit();
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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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if (!safe)
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envinit(environ);
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yyparse();
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setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */
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if (fs)
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*FS = 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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return(errorflag);
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}
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int pgetc(void) /* get 1 character from awk program */
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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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if (strcmp(pfile[curpfile], "-") == 0)
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yyin = stdin;
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else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
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FATAL("can't open file %s", pfile[curpfile]);
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lineno = 1;
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}
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if ((c = getc(yyin)) != EOF)
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return c;
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if (yyin != stdin)
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fclose(yyin);
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yyin = NULL;
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curpfile++;
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}
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}
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char *cursource(void) /* current source file name */
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{
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if (npfile > 0)
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return pfile[curpfile];
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else
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return NULL;
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}
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