148 lines
3.1 KiB
C
148 lines
3.1 KiB
C
/*
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* Mini tee implementation for busybox
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*
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*
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* Copyright (C) 1999 by Lineo, inc.
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* Written by John Beppu <beppu@line.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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/* FileList _______________________________________________________________ */
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#define FL_MAX 1024
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static FILE *FileList[FL_MAX];
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static int FL_end;
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typedef void (FL_Function)(FILE *file, char c);
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/* initialize FileList */
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static void
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FL_init()
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{
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FL_end = 0;
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FileList[0] = stdout;
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}
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/* add a file to FileList */
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static int
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FL_add(const char *filename, char *opt_open)
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{
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FILE *file;
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file = fopen(filename, opt_open);
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if (!file) { return 0; };
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if (FL_end < FL_MAX) {
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FileList[++FL_end] = file;
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}
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return 1;
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}
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/* apply a function to everything in FileList */
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static void
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FL_apply(FL_Function *f, char c)
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{
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int i;
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for (i = 0; i <= FL_end; i++) {
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f(FileList[i], c);
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}
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}
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/* ________________________________________________________________________ */
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/* FL_Function for writing to files*/
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static void
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tee_fwrite(FILE *file, char c)
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{
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fputc(c, file);
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}
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/* FL_Function for closing files */
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static void
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tee_fclose(FILE *file, char c)
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{
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fclose(file);
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}
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/* help message */
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static void
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tee_usage()
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{
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fprintf (
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stdout,
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"%s\n%s\n%s\n%s\n%s\n",
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"Usage: tee [OPTION]... [FILE]...",
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"Copy standard input to each FILE, and also to standard output.\n",
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" -a, append to the given FILEs, do not overwrite",
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" -i, ignore interrupt signals",
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" -h, this help message"
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);
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exit(1);
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}
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/* BusyBoxed tee(1) */
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int
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tee_main(int argc, char **argv)
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{
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int i;
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char c;
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char opt;
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char opt_fopen[2] = "w";
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/* parse argv[] */
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for (i = 1; i < argc; i++) {
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if (argv[i][0] == '-') {
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opt = argv[i][1];
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switch (opt) {
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case 'a':
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opt_fopen[0] = 'a';
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break;
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case 'i':
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fprintf(stderr, "ingore interrupt not implemented\n");
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break;
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case 'h':
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tee_usage();
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break;
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default:
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fprintf(stderr, "tee: invalid option -- %c\n", opt);
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tee_usage();
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}
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} else {
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break;
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}
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}
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/* init FILE pointers */
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FL_init();
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for ( ; i < argc; i++) {
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FL_add(argv[i], opt_fopen);
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}
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/* read and redirect */
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while ((c = (char) getchar()) && (!feof(stdin))) {
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FL_apply(tee_fwrite, c);
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}
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/* clean up */
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FL_apply(tee_fclose, 0);
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exit(0);
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}
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/* $Id: tee.c,v 1.1 1999/12/10 05:27:16 beppu Exp $ */
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