initial import of NetBSD tree

1 files changed, 120 insertions, 0 deletions

diff --git a/bin/sh/var.h b/bin/sh/var.h
new file mode 100644
index 00000000000..496b9788108
--- /dev/null
+++ b/bin/sh/var.h
@@ -0,0 +1,120 @@
+/*	$NetBSD: var.h,v 1.9 1995/05/11 21:30:44 christos Exp $	*/
+
+/*-
+ * 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.
+ *
+ *	@(#)var.h	8.2 (Berkeley) 5/4/95
+ */
+
+/*
+ * Shell variables.
+ */
+
+/* flags */
+#define VEXPORT		01	/* variable is exported */
+#define VREADONLY	02	/* variable cannot be modified */
+#define VSTRFIXED	04	/* variable struct is staticly allocated */
+#define VTEXTFIXED	010	/* text is staticly allocated */
+#define VSTACK		020	/* text is allocated on the stack */
+#define VUNSET		040	/* the variable is not set */
+
+
+struct var {
+	struct var *next;		/* next entry in hash list */
+	int flags;		/* flags are defined above */
+	char *text;		/* name=value */
+};
+
+
+struct localvar {
+	struct localvar *next;	/* next local variable in list */
+	struct var *vp;		/* the variable that was made local */
+	int flags;		/* saved flags */
+	char *text;		/* saved text */
+};
+
+
+struct localvar *localvars;
+
+#if ATTY
+extern struct var vatty;
+#endif
+extern struct var vifs;
+extern struct var vmail;
+extern struct var vmpath;
+extern struct var vpath;
+extern struct var vps1;
+extern struct var vps2;
+#if ATTY
+extern struct var vterm;
+#endif
+
+/*
+ * The following macros access the values of the above variables.
+ * They have to skip over the name.  They return the null string
+ * for unset variables.
+ */
+
+#define ifsval()	(vifs.text + 4)
+#define mailval()	(vmail.text + 5)
+#define mpathval()	(vmpath.text + 9)
+#define pathval()	(vpath.text + 5)
+#define ps1val()	(vps1.text + 4)
+#define ps2val()	(vps2.text + 4)
+#if ATTY
+#define termval()	(vterm.text + 5)
+#endif
+
+#if ATTY
+#define attyset()	((vatty.flags & VUNSET) == 0)
+#endif
+#define mpathset()	((vmpath.flags & VUNSET) == 0)
+
+void initvar __P((void));
+void setvar __P((char *, char *, int));
+void setvareq __P((char *, int));
+struct strlist;
+void listsetvar __P((struct strlist *)); 
+char *lookupvar __P((char *));
+char *bltinlookup __P((char *, int));
+char **environment __P((void));
+void shprocvar __P((void));
+int showvarscmd __P((int, char **));
+int exportcmd __P((int, char **));
+int localcmd __P((int, char **));
+void mklocal __P((char *));   
+void poplocalvars __P((void));
+int setvarcmd __P((int, char **));
+int unsetcmd __P((int, char **));