110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/*-
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* 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 8.2 (Berkeley) 5/4/95
|
|
* $Id: echo.c,v 1.7 1997/02/22 13:58:59 peter Exp $
|
|
*/
|
|
|
|
/*
|
|
* Echo command.
|
|
*/
|
|
|
|
#define main echocmd
|
|
|
|
#include "bltin.h"
|
|
|
|
/* #define eflag 1 */
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
char **ap;
|
|
char *p;
|
|
char c;
|
|
int count;
|
|
int nflag = 0;
|
|
#ifndef eflag
|
|
int eflag = 0;
|
|
#endif
|
|
|
|
ap = argv;
|
|
if (argc)
|
|
ap++;
|
|
if ((p = *ap) != NULL) {
|
|
if (equal(p, "-n")) {
|
|
nflag++;
|
|
ap++;
|
|
} else if (equal(p, "-e")) {
|
|
#ifndef eflag
|
|
eflag++;
|
|
#endif
|
|
ap++;
|
|
}
|
|
}
|
|
while ((p = *ap++) != NULL) {
|
|
while ((c = *p++) != '\0') {
|
|
if (c == '\\' && eflag) {
|
|
switch (*p++) {
|
|
case 'b': c = '\b'; break;
|
|
case 'c': return 0; /* exit */
|
|
case 'f': c = '\f'; break;
|
|
case 'n': c = '\n'; break;
|
|
case 'r': c = '\r'; break;
|
|
case 't': c = '\t'; break;
|
|
case 'v': c = '\v'; break;
|
|
case '\\': break; /* c = '\\' */
|
|
case '0':
|
|
c = 0;
|
|
count = 3;
|
|
while (--count >= 0 && (unsigned)(*p - '0') < 8)
|
|
c = (c << 3) + (*p++ - '0');
|
|
break;
|
|
default:
|
|
p--;
|
|
break;
|
|
}
|
|
}
|
|
putchar(c);
|
|
}
|
|
if (*ap)
|
|
putchar(' ');
|
|
}
|
|
if (! nflag)
|
|
putchar('\n');
|
|
return 0;
|
|
}
|