shell_cmds-198.tar.gz

[apple/shell_cmds.git] / sh / bltin / echo.c

diff --git a/sh/bltin/echo.c b/sh/bltin/echo.c
new file mode 100644 (file)
index 0000000..457a4c7
--- /dev/null
+++ b/sh/bltin/echo.c
@@ -0,0 +1,107 @@
+/*-
+ * 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.
+ * 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
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Echo command.
+ */
+
+#define main echocmd
+
+#include "bltin.h"
+
+/* #define eflag 1 */
+
+int
+main(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 'a':  c = '\a';  break;
+                               case 'b':  c = '\b';  break;
+                               case 'c':  return 0;            /* exit */
+                               case 'e':  c = '\033';  break;
+                               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;
+}