154 lines
2.6 KiB
C
154 lines
2.6 KiB
C
/*
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* a small awk clone
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*
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* (C) 1989 Saeko Hirabauashi & Kouichi Hirabayashi
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*
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* Absolutely no warranty. Use this software with your own risk.
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*
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* Permission to use, copy, modify and distribute this software for any
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* purpose and without fee is hereby granted, provided that the above
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* copyright and disclaimer notice.
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*
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* This program was written to fit into 64K+64K memory of the Minix 1.2.
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <signal.h>
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#include "awk.h"
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extern char **FS, **FILENAME;
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extern char record[];
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extern FILE *ifp;
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NODE *parse();
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CELL *execute();
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FILE *efopen(), *fopen();
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char *strsave();
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int xargc;
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char **xargv;
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char *srcprg;
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FILE *pfp;
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char *cmd;
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#if 0
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int iflg; /* interactive mode */
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#endif
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main(argc, argv, envp) char **argv, *envp;
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{
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char *s, *strpbrk(), *strchr();
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void onint();
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#ifdef DOS
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_sharg(&argc, &argv);
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#endif
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signal(SIGINT, onint);
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signal(SIGFPE, onint);
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cmd = argv[0];
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init();
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while (--argc > 0 && (*++argv)[0] == '-')
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for (s = argv[0]+1; *s; s++)
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if (strcmp(argv[0], "-") == 0)
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break;
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else
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switch (*s) {
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#if 0
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case 'i':
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iflg++;
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pfp = stdin;
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interactive();
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/* no return */
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#endif
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case 'F':
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*FS = ++s;
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break;
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case 'f':
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if (*(s+1))
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s++;
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else {
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argc--; s = *++argv;
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}
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if (s == NULL) usage();
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pfp = efopen(s, "r");
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s += strlen(s) - 1;
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break;
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}
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xargc = argc; xargv = argv;
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if (pfp == NULL && xargc > 0) {
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srcprg = *xargv++; xargc--;
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}
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/*
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if (pfp == NULL && xargc > 0) {
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if (strpbrk(xargv[0], " !$^()={}[];<>,/~") != NULL) {
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sprintf(record, "%s\n", xargv[0]);
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srcprg = strsave(record);
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}
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else {
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sprintf(record, "%s.awk", xargv[0]);
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if ((pfp = fopen(record, "r")) == NULL)
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error("can't open %s", record);
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}
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xargc--; xargv++;
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}
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*/
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if (pfp == NULL && srcprg == NULL) usage();
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while (*xargv != NULL && strchr(*xargv, '=') != NULL) {
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setvar(*xargv++);
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xargc--;
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}
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initarg(cmd, xargc, xargv, envp);
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if (xargc == 0) {
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ifp = stdin; *FILENAME = "-";
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}
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parse();
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closeall();
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exit(0);
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}
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FILE *
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efopen(file, mode) char *file, *mode;
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{
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FILE *fp, *fopen();
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if ((fp = fopen(file, mode)) == NULL)
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error("cannot open %s", file);
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return fp;
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}
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error(s, t) char *s, *t;
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{
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extern double *NR;
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fprintf(stderr, "awk: ");
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fprintf(stderr, s, t);
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fprintf(stderr, "\n");
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if (NR != NULL) {
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fprintf(stderr, "record number %g\n", *NR);
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}
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#ifdef DOS
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closeall();
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#endif
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exit(1);
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}
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void
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onint(i)
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{
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closeall();
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exit(0x80 | i);
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}
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void
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usage()
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{
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fprintf(stderr,
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"usage: %s [options] [-f <rulefile> | <rules>] [inputfiles]\n", cmd);
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closeall();
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exit(1);
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}
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