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- /*-
- * Copyright (c) 1991 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 5.1 (Berkeley) 3/7/91
- */
-
- /*
- * 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)
-
-
- #ifdef __STDC__
- void initvar();
- void setvar(char *, char *, int);
- void setvareq(char *, int);
- struct strlist;
- void listsetvar(struct strlist *);
- char *lookupvar(char *);
- char *bltinlookup(char *, int);
- char **environment();
- int showvarscmd(int, char **);
- void mklocal(char *);
- void poplocalvars(void);
- #else
- void initvar();
- void setvar();
- void setvareq();
- void listsetvar();
- char *lookupvar();
- char *bltinlookup();
- char **environment();
- int showvarscmd();
- void mklocal();
- void poplocalvars();
- #endif
-