aboutsummaryrefslogtreecommitdiff
path: root/echo.c
diff options
context:
space:
mode:
Diffstat (limited to 'echo.c')
-rw-r--r--echo.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/echo.c b/echo.c
new file mode 100644
index 000000000..91f17aa0f
--- /dev/null
+++ b/echo.c
@@ -0,0 +1,126 @@
+/* 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 "internal.h"
+#include <stdio.h>
+
+extern int
+echo_main(int argc, char** argv)
+{
+ register char **ap;
+ register char *p;
+ register char c;
+ int nflag = 0;
+ int eflag = 0;
+
+ ap = argv;
+ if (argc)
+ ap++;
+ while ((p = *ap) != NULL && *p == '-') {
+ if (strcmp(p, "-n")==0) {
+ nflag = 1;
+ } else if (strcmp(p, "-e")==0) {
+ eflag = 1;
+ } else if (strcmp(p, "-E")==0) {
+ eflag = 0;
+ }
+ else break;
+ ap++;
+ }
+ while ((p = *ap++) != NULL) {
+ while ((c = *p++) != '\0') {
+ if (c == '\\' && eflag) {
+ switch (c = *p++) {
+ case 'a': c = '\007'; break;
+ case 'b': c = '\b'; break;
+ case 'c': exit( 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': case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7':
+ c -= '0';
+ if (*p >= '0' && *p <= '7')
+ c = c * 8 + (*p++ - '0');
+ if (*p >= '0' && *p <= '7')
+ c = c * 8 + (*p++ - '0');
+ break;
+ default:
+ p--;
+ break;
+ }
+ }
+ putchar(c);
+ }
+ if (*ap)
+ putchar(' ');
+ }
+ if (! nflag)
+ putchar('\n');
+ fflush(stdout);
+ exit( 0);
+}
+
+/*-
+ * 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 8.1 (Berkeley) 5/31/93
+ */
+
+