mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
b1a667509b
adding history and vi/emacs-style line editing to the shell itself. Atty was a user-mode terminal emulator (like screen and window) that did line editing and history.
123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
/*-
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* Shell variables.
|
|
*/
|
|
|
|
/* flags */
|
|
#define VEXPORT 0x01 /* variable is exported */
|
|
#define VREADONLY 0x02 /* variable cannot be modified */
|
|
#define VSTRFIXED 0x04 /* variable struct is staticly allocated */
|
|
#define VTEXTFIXED 0x08 /* text is staticly allocated */
|
|
#define VSTACK 0x10 /* text is allocated on the stack */
|
|
#define VUNSET 0x20 /* the variable is not set */
|
|
#define VNOFUNC 0x40 /* don't call the callback function */
|
|
|
|
|
|
struct var {
|
|
struct var *next; /* next entry in hash list */
|
|
int flags; /* flags are defined above */
|
|
char *text; /* name=value */
|
|
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 */
|
|
};
|
|
|
|
|
|
struct localvar *localvars;
|
|
|
|
extern struct var vifs;
|
|
extern struct var vmail;
|
|
extern struct var vmpath;
|
|
extern struct var vpath;
|
|
extern struct var vppid;
|
|
extern struct var vps1;
|
|
extern struct var vps2;
|
|
#ifndef NO_HISTORY
|
|
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 ifsval() (vifs.text + 4)
|
|
#define ifsset() ((vifs.flags & VUNSET) == 0)
|
|
#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 optindval() (voptind.text + 7)
|
|
#ifndef NO_HISTORY
|
|
#define histsizeval() (vhistsize.text + 9)
|
|
#endif
|
|
|
|
#define mpathset() ((vmpath.flags & VUNSET) == 0)
|
|
|
|
void initvar(void);
|
|
void setvar(char *, char *, int);
|
|
void setvareq(char *, int);
|
|
struct strlist;
|
|
void listsetvar(struct strlist *);
|
|
char *lookupvar(char *);
|
|
char *bltinlookup(char *, int);
|
|
char **environment(void);
|
|
void shprocvar(void);
|
|
int showvarscmd(int, char **);
|
|
int exportcmd(int, char **);
|
|
int localcmd(int, char **);
|
|
void mklocal(char *);
|
|
void poplocalvars(void);
|
|
int setvarcmd(int, char **);
|
|
int unsetcmd(int, char **);
|
|
int unsetvar(char *);
|
|
int setvarsafe(char *, char *, int);
|