WebSVN – HelenOS – Diff – /tags/0.3.0/uspace/app/ash/var.h


/*  $NetBSD: var.h,v 1.18 2000/05/22 10:18:47 elric 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     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;
 
#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;
#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 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 SMALL
#define histsizeval()   (vhistsize.text + 9)
#define termval()   (vterm.text + 5)
#endif
 
#if ATTY
#define attyset()   ((vatty.flags & VUNSET) == 0)
#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 *);
char *lookupvar (const char *);
char *bltinlookup (const 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 (const char *);
int setvarsafe (const char *, const char *, int);
 

Rev 2714	Rev 2782
1	/* $NetBSD: var.h,v 1.18 2000/05/22 10:18:47 elric Exp $ */	1	/* $NetBSD: var.h,v 1.18 2000/05/22 10:18:47 elric Exp $ */
2		2
3	/*-	3	/*-
4	* Copyright (c) 1991, 1993	4	* Copyright (c) 1991, 1993
5	* The Regents of the University of California. All rights reserved.	5	* The Regents of the University of California. All rights reserved.
6	*	6	*
7	* This code is derived from software contributed to Berkeley by	7	* This code is derived from software contributed to Berkeley by
8	* Kenneth Almquist.	8	* Kenneth Almquist.
9	*	9	*
10	* Redistribution and use in source and binary forms, with or without	10	* Redistribution and use in source and binary forms, with or without
11	* modification, are permitted provided that the following conditions	11	* modification, are permitted provided that the following conditions
12	* are met:	12	* are met:
13	* 1. Redistributions of source code must retain the above copyright	13	* 1. Redistributions of source code must retain the above copyright
14	* notice, this list of conditions and the following disclaimer.	14	* notice, this list of conditions and the following disclaimer.
15	* 2. Redistributions in binary form must reproduce the above copyright	15	* 2. Redistributions in binary form must reproduce the above copyright
16	* notice, this list of conditions and the following disclaimer in the	16	* notice, this list of conditions and the following disclaimer in the
17	* documentation and/or other materials provided with the distribution.	17	* documentation and/or other materials provided with the distribution.
18	* 3. All advertising materials mentioning features or use of this software	18	* 3. All advertising materials mentioning features or use of this software
19	* must display the following acknowledgement:	19	* must display the following acknowledgement:
20	* This product includes software developed by the University of	20	* This product includes software developed by the University of
21	* California, Berkeley and its contributors.	21	* California, Berkeley and its contributors.
22	* 4. Neither the name of the University nor the names of its contributors	22	* 4. Neither the name of the University nor the names of its contributors
23	* may be used to endorse or promote products derived from this software	23	* may be used to endorse or promote products derived from this software
24	* without specific prior written permission.	24	* without specific prior written permission.
25	*	25	*
26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND	26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE	27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL	30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS	31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)	32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT	33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY	34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF	35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36	* SUCH DAMAGE.	36	* SUCH DAMAGE.
37	*	37	*
38	* @(#)var.h 8.2 (Berkeley) 5/4/95	38	* @(#)var.h 8.2 (Berkeley) 5/4/95
39	*/	39	*/
40		40
41	/*	41	/*
42	* Shell variables.	42	* Shell variables.
43	*/	43	*/
44		44
45	/* flags */	45	/* flags */
46	#define VEXPORT 0x01 /* variable is exported */	46	#define VEXPORT 0x01 /* variable is exported */
47	#define VREADONLY 0x02 /* variable cannot be modified */	47	#define VREADONLY 0x02 /* variable cannot be modified */
48	#define VSTRFIXED 0x04 /* variable struct is staticly allocated */	48	#define VSTRFIXED 0x04 /* variable struct is staticly allocated */
49	#define VTEXTFIXED 0x08 /* text is staticly allocated */	49	#define VTEXTFIXED 0x08 /* text is staticly allocated */
50	#define VSTACK 0x10 /* text is allocated on the stack */	50	#define VSTACK 0x10 /* text is allocated on the stack */
51	#define VUNSET 0x20 /* the variable is not set */	51	#define VUNSET 0x20 /* the variable is not set */
52	#define VNOFUNC 0x40 /* don't call the callback function */	52	#define VNOFUNC 0x40 /* don't call the callback function */
53		53
54		54
55	struct var {	55	struct var {
56	struct var next; / next entry in hash list */	56	struct var next; / next entry in hash list */
57	int flags; /* flags are defined above */	57	int flags; /* flags are defined above */
58	char text; / name=value */	58	char text; / name=value */
59	void (func) (const char );	59	void (func) (const char );
60	/* function to be called when */	60	/* function to be called when */
61	/* the variable gets set/unset */	61	/* the variable gets set/unset */
62	};	62	};
63		63
64		64
65	struct localvar {	65	struct localvar {
66	struct localvar next; / next local variable in list */	66	struct localvar next; / next local variable in list */
67	struct var vp; / the variable that was made local */	67	struct var vp; / the variable that was made local */
68	int flags; /* saved flags */	68	int flags; /* saved flags */
69	char text; / saved text */	69	char text; / saved text */
70	};	70	};
71		71
72		72
73	struct localvar *localvars;	73	struct localvar *localvars;
74		74
75	#if ATTY	75	#if ATTY
76	extern struct var vatty;	76	extern struct var vatty;
77	#endif	77	#endif
78	extern struct var vifs;	78	extern struct var vifs;
79	extern struct var vmail;	79	extern struct var vmail;
80	extern struct var vmpath;	80	extern struct var vmpath;
81	extern struct var vpath;	81	extern struct var vpath;
82	extern struct var vps1;	82	extern struct var vps1;
83	extern struct var vps2;	83	extern struct var vps2;
84	#ifndef SMALL	84	#ifndef SMALL
85	extern struct var vterm;	85	extern struct var vterm;
86	extern struct var vtermcap;	86	extern struct var vtermcap;
87	extern struct var vhistsize;	87	extern struct var vhistsize;
88	#endif	88	#endif
89		89
90	/*	90	/*
91	* The following macros access the values of the above variables.	91	* The following macros access the values of the above variables.
92	* They have to skip over the name. They return the null string	92	* They have to skip over the name. They return the null string
93	* for unset variables.	93	* for unset variables.
94	*/	94	*/
95		95
96	#define ifsval() (vifs.text + 4)	96	#define ifsval() (vifs.text + 4)
97	#define ifsset() ((vifs.flags & VUNSET) == 0)	97	#define ifsset() ((vifs.flags & VUNSET) == 0)
98	#define mailval() (vmail.text + 5)	98	#define mailval() (vmail.text + 5)
99	#define mpathval() (vmpath.text + 9)	99	#define mpathval() (vmpath.text + 9)
100	#define pathval() (vpath.text + 5)	100	#define pathval() (vpath.text + 5)
101	#define ps1val() (vps1.text + 4)	101	#define ps1val() (vps1.text + 4)
102	#define ps2val() (vps2.text + 4)	102	#define ps2val() (vps2.text + 4)
103	#define optindval() (voptind.text + 7)	103	#define optindval() (voptind.text + 7)
104	#ifndef SMALL	104	#ifndef SMALL
105	#define histsizeval() (vhistsize.text + 9)	105	#define histsizeval() (vhistsize.text + 9)
106	#define termval() (vterm.text + 5)	106	#define termval() (vterm.text + 5)
107	#endif	107	#endif
108		108
109	#if ATTY	109	#if ATTY
110	#define attyset() ((vatty.flags & VUNSET) == 0)	110	#define attyset() ((vatty.flags & VUNSET) == 0)
111	#endif	111	#endif
112	#define mpathset() ((vmpath.flags & VUNSET) == 0)	112	#define mpathset() ((vmpath.flags & VUNSET) == 0)
113		113
114	void initvar (void);	114	void initvar (void);
115	void setvar (const char , const char , int);	115	void setvar (const char , const char , int);
116	void setvareq (char *, int);	116	void setvareq (char *, int);
117	struct strlist;	117	struct strlist;
118	void listsetvar (struct strlist *);	118	void listsetvar (struct strlist *);
119	char lookupvar (const char );	119	char lookupvar (const char );
120	char bltinlookup (const char , int);	120	char bltinlookup (const char , int);
121	char **environment (void);	121	char **environment (void);
122	void shprocvar (void);	122	void shprocvar (void);
123	int showvarscmd (int, char **);	123	int showvarscmd (int, char **);
124	int exportcmd (int, char **);	124	int exportcmd (int, char **);
125	int localcmd (int, char **);	125	int localcmd (int, char **);
126	void mklocal (char *);	126	void mklocal (char *);
127	void poplocalvars (void);	127	void poplocalvars (void);
128	int setvarcmd (int, char **);	128	int setvarcmd (int, char **);
129	int unsetcmd (int, char **);	129	int unsetcmd (int, char **);
130	int unsetvar (const char *);	130	int unsetvar (const char *);
131	int setvarsafe (const char , const char , int);	131	int setvarsafe (const char , const char , int);
132		132

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(root)/tags/0.3.0/uspace/app/ash/var.h – Rev 2714 → 2782