9302f8ef1a
variable (with its current value set at 20160401) as discussed on
current-users and tech-userlevel. This also includes the necessary
support to implement it properly (particularly the unexportable
part) and adds options to the export command to support unexportable
variables. Also implement the "posix" option (no single letter
equivalent) which gets its default value from whether or not
POSIXLY_CORRECT is set in the environment when the shell starts
(but can be changed just like any other option using -o and +o on
the command line, or the set builtin command.) While there, fix
all uses of options so it is possible to have options that have a
short (one char) name, and no long name, just as it has been possible
to have options with a long name and no short name, though there
are currently none (with no long name). For now, the only use of
the posix option is to control whether ${ENV} is read at startup
by a non-interactive shell, so changing it with set is not usful
- that might change in the future. (from kre@)
127 lines
4.3 KiB
C
127 lines
4.3 KiB
C
/* $NetBSD: var.h,v 1.28 2016/03/31 16:16:35 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. 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 0x0001 /* variable is exported */
|
|
#define VREADONLY 0x0002 /* variable cannot be modified */
|
|
#define VSTRFIXED 0x0004 /* variable struct is statically allocated */
|
|
#define VTEXTFIXED 0x0008 /* text is statically allocated */
|
|
#define VSTACK 0x0010 /* text is allocated on the stack */
|
|
#define VUNSET 0x0020 /* the variable is not set */
|
|
#define VNOFUNC 0x0040 /* don't call the callback function */
|
|
#define VNOSET 0x0080 /* do not set variable - just readonly test */
|
|
#define VNOEXPORT 0x0100 /* variable may not be exported */
|
|
|
|
|
|
struct var {
|
|
struct var *next; /* next entry in hash list */
|
|
int flags; /* flags are defined above */
|
|
char *text; /* name=value */
|
|
int name_len; /* length of name */
|
|
void (*func)(const char *);
|
|
/* function to be called when */
|
|
/* the variable gets set/unset */
|
|
};
|
|
|
|
|
|
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 */
|
|
};
|
|
|
|
|
|
extern struct localvar *localvars;
|
|
|
|
extern struct var vifs;
|
|
extern char ifs_default[];
|
|
extern struct var vmail;
|
|
extern struct var vmpath;
|
|
extern struct var vpath;
|
|
extern struct var vps1;
|
|
extern struct var vps2;
|
|
extern struct var vps4;
|
|
#ifndef SMALL
|
|
extern struct var vterm;
|
|
extern struct var vtermcap;
|
|
extern struct var vhistsize;
|
|
#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 ifsset() ((vifs.flags & VUNSET) == 0)
|
|
#define ifsval() (ifsset() ? (vifs.text + 4) : ifs_default)
|
|
#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)
|
|
#define ps4val() (vps4.text + 4)
|
|
#define optindval() (voptind.text + 7)
|
|
#ifndef SMALL
|
|
#define histsizeval() (vhistsize.text + 9)
|
|
#define termval() (vterm.text + 5)
|
|
#endif
|
|
|
|
#define mpathset() ((vmpath.flags & VUNSET) == 0)
|
|
|
|
void initvar(void);
|
|
void setvar(const char *, const char *, int);
|
|
void setvareq(char *, int);
|
|
struct strlist;
|
|
void listsetvar(struct strlist *, int);
|
|
char *lookupvar(const char *);
|
|
char *bltinlookup(const char *, int);
|
|
char **environment(void);
|
|
void shprocvar(void);
|
|
int showvars(const char *, int, int, const char *);
|
|
void mklocal(const char *, int);
|
|
void listmklocal(struct strlist *, int);
|
|
void poplocalvars(void);
|
|
int unsetvar(const char *, int);
|
|
void choose_ps1(void);
|
|
int setvarsafe(const char *, const char *, int);
|
|
void print_quoted(const char *);
|