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/*
* Mini tee implementation for busybox
*
*
* Copyright (C) 1999 by Lineo, inc.
* Written by John Beppu <beppu@lineo.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
#include <stdlib.h>
/* FileList _______________________________________________________________ */
#define FL_MAX 1024
static FILE *FileList[FL_MAX];
static int FL_end;
typedef void (FL_Function)(FILE *file, char c);
/* initialize FileList */
static void
FL_init()
{
FL_end = 0;
FileList[0] = stdout;
}
/* add a file to FileList */
static int
FL_add(const char *filename, char *opt_open)
{
FILE *file;
file = fopen(filename, opt_open);
if (!file) { return 0; };
if (FL_end < FL_MAX) {
FileList[++FL_end] = file;
}
return 1;
}
/* apply a function to everything in FileList */
static void
FL_apply(FL_Function *f, char c)
{
int i;
for (i = 0; i <= FL_end; i++) {
f(FileList[i], c);
}
}
/* ________________________________________________________________________ */
/* FL_Function for writing to files*/
static void
tee_fwrite(FILE *file, char c)
{
fputc(c, file);
}
/* FL_Function for closing files */
static void
tee_fclose(FILE *file, char c)
{
fclose(file);
}
/* help message */
static void
tee_usage()
{
fprintf (
stdout,
"%s\n%s\n%s\n%s\n%s\n",
"Usage: tee [OPTION]... [FILE]...",
"Copy standard input to each FILE, and also to standard output.\n",
" -a, append to the given FILEs, do not overwrite",
" -i, ignore interrupt signals",
" -h, this help message"
);
exit(1);
}
/* BusyBoxed tee(1) */
int
tee_main(int argc, char **argv)
{
int i;
char c;
char opt;
char opt_fopen[2] = "w";
/* parse argv[] */
for (i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
opt = argv[i][1];
switch (opt) {
case 'a':
opt_fopen[0] = 'a';
break;
case 'i':
fprintf(stderr, "ingore interrupt not implemented\n");
break;
case 'h':
tee_usage();
break;
default:
fprintf(stderr, "tee: invalid option -- %c\n", opt);
tee_usage();
}
} else {
break;
}
}
/* init FILE pointers */
FL_init();
for ( ; i < argc; i++) {
FL_add(argv[i], opt_fopen);
}
/* read and redirect */
while ((c = (char) getchar()) && (!feof(stdin))) {
FL_apply(tee_fwrite, c);
}
/* clean up */
FL_apply(tee_fclose, 0);
exit(0);
}
/* $Id: tee.c,v 1.2 1999/12/10 06:45:42 andersen Exp $ */
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