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135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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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@lineo.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 "internal.h"
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#include <errno.h>
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#include <stdio.h>
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static const char tee_usage[] =
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"tee [OPTION]... [FILE]...\n\n"
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"Copy standard input to each FILE, and also to standard output.\n\n"
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"Options:\n" "\t-a\tappend to the given FILEs, do not overwrite\n"
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#if 0
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"\t-i\tignore interrupt signals\n"
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#endif
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;
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/* FileList _______________________________________________________________ */
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#define FL_MAX 1024
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static FILE **FileList;
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static int FL_end;
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typedef void (FL_Function) (FILE * file, char c);
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/* apply a function to everything in FileList */
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static void 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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/* FL_Function for writing to files*/
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static void 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 tee_fclose(FILE * file, char c)
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{
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fclose(file);
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}
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/* ________________________________________________________________________ */
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/* BusyBoxed tee(1) */
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int 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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FILE *file;
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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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#if 0
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case 'i':
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fprintf(stderr, "ignore interrupt not implemented\n");
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break;
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#endif
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default:
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usage(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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FileList = calloc(FL_MAX, sizeof(FILE*));
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if (!FileList) {
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fprintf(stderr, "tee: %s\n", strerror(errno));
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exit(1);
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}
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FL_end = 0;
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FileList[0] = stdout;
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for (; i < argc; i++) {
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/* add a file to FileList */
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file = fopen(argv[i], opt_fopen);
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if (!file) {
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continue;
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}
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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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}
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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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/* Don't bother to close files Exit does that
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* automagically, so we can save a few bytes */
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/* free(FileList); */
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exit(0);
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}
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/* $Id: tee.c,v 1.8 2000/03/23 01:09:18 erik Exp $ */
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