mirror of
https://github.com/sheumann/hush.git
synced 2024-12-22 14:30:31 +00:00
153 lines
4.2 KiB
C
153 lines
4.2 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* echo implementation for busybox
|
|
*
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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
|
|
*
|
|
* Original copyright notice is retained at the end of this file.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include "busybox.h"
|
|
|
|
extern int
|
|
echo_main(int argc, char** argv)
|
|
{
|
|
int nflag = 0;
|
|
int eflag = 0;
|
|
|
|
/* Skip argv[0]. */
|
|
argc--;
|
|
argv++;
|
|
|
|
while (argc > 0 && *argv[0] == '-')
|
|
{
|
|
register char *temp;
|
|
register int ix;
|
|
|
|
/*
|
|
* If it appears that we are handling options, then make sure
|
|
* that all of the options specified are actually valid.
|
|
* Otherwise, the string should just be echoed.
|
|
*/
|
|
temp = argv[0] + 1;
|
|
|
|
for (ix = 0; temp[ix]; ix++)
|
|
{
|
|
if (strrchr("neE", temp[ix]) == 0)
|
|
goto just_echo;
|
|
}
|
|
|
|
if (!*temp)
|
|
goto just_echo;
|
|
|
|
/*
|
|
* All of the options in temp are valid options to echo.
|
|
* Handle them.
|
|
*/
|
|
while (*temp)
|
|
{
|
|
if (*temp == 'n')
|
|
nflag = 1;
|
|
else if (*temp == 'e')
|
|
eflag = 1;
|
|
else if (*temp == 'E')
|
|
eflag = 0;
|
|
else
|
|
goto just_echo;
|
|
|
|
temp++;
|
|
}
|
|
argc--;
|
|
argv++;
|
|
}
|
|
|
|
just_echo:
|
|
while (argc > 0) {
|
|
const char *arg = argv[0];
|
|
register int c;
|
|
|
|
while ((c = *arg++)) {
|
|
|
|
/* Check for escape sequence. */
|
|
if (c == '\\' && eflag && *arg) {
|
|
if (*arg == 'c') {
|
|
/* '\c' means cancel newline. */
|
|
nflag = 1;
|
|
arg++;
|
|
continue;
|
|
} else {
|
|
c = process_escape_sequence(&arg);
|
|
}
|
|
}
|
|
|
|
putchar(c);
|
|
}
|
|
argc--;
|
|
argv++;
|
|
if (argc > 0)
|
|
putchar(' ');
|
|
}
|
|
if (!nflag)
|
|
putchar('\n');
|
|
fflush(stdout);
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|
|
|
|
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Kenneth Almquist.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
|
|
* ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
|
|
*
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)echo.c 8.1 (Berkeley) 5/31/93
|
|
*/
|