dc83385122
in prompts when expanded at prompt time, but all available for general use. Many of the new ones are not available in SMALL shells (they work as normal if assigned, but the shell does not set or use them - and there is no magic in a SMALL shell (usually for install media.))
148 lines
4.9 KiB
C
148 lines
4.9 KiB
C
/* $NetBSD: var.h,v 1.35 2017/06/30 23:05:45 kre Exp $ */
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/*-
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* Copyright (c) 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Kenneth Almquist.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)var.h 8.2 (Berkeley) 5/4/95
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*/
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#ifndef VUNSET /* double include protection */
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/*
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* Shell variables.
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*/
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/* flags */
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#define VUNSET 0x0001 /* the variable is not set */
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#define VEXPORT 0x0002 /* variable is exported */
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#define VREADONLY 0x0004 /* variable cannot be modified */
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#define VNOEXPORT 0x0008 /* variable may not be exported */
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#define VSTRFIXED 0x0010 /* variable struct is statically allocated */
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#define VTEXTFIXED 0x0020 /* text is statically allocated */
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#define VSTACK 0x0040 /* text is allocated on the stack */
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#define VNOFUNC 0x0100 /* don't call the callback function */
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#define VFUNCREF 0x0200 /* the function is called on ref, not set */
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#define VNOSET 0x4000 /* do not set variable - just readonly test */
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#define VNOERROR 0x8000 /* be quiet if set fails (no error msg) */
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struct var;
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union var_func_union { /* function to be called when: */
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void (*set_func)(const char *); /* variable gets set/unset */
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char*(*ref_func)(struct var *); /* variable is referenced */
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};
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struct var {
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struct var *next; /* next entry in hash list */
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int flags; /* flags are defined above */
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char *text; /* name=value */
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int name_len; /* length of name */
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union var_func_union v_u; /* function to apply (sometimes) */
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};
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struct localvar {
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struct localvar *next; /* next local variable in list */
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struct var *vp; /* the variable that was made local */
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int flags; /* saved flags */
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char *text; /* saved text */
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};
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extern struct localvar *localvars;
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extern struct var vifs;
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extern char ifs_default[];
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extern struct var vmail;
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extern struct var vmpath;
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extern struct var vpath;
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extern struct var vps1;
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extern struct var vps2;
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extern struct var vps4;
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extern struct var line_num;
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#ifndef SMALL
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extern struct var editrc;
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extern struct var vterm;
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extern struct var vtermcap;
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extern struct var vhistsize;
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extern struct var ps_lit;
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extern struct var euname;
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extern struct var random_num;
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extern intmax_t sh_start_time;
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#endif
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extern int line_number;
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extern int funclinebase;
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extern int funclineabs;
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/*
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* The following macros access the values of the above variables.
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* They have to skip over the name. They return the null string
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* for unset variables.
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*/
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#define ifsset() ((vifs.flags & VUNSET) == 0)
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#define ifsval() (ifsset() ? (vifs.text + 4) : ifs_default)
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#define mailval() (vmail.text + 5)
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#define mpathval() (vmpath.text + 9)
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#define pathval() (vpath.text + 5)
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#define ps1val() (vps1.text + 4)
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#define ps2val() (vps2.text + 4)
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#define ps4val() (vps4.text + 4)
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#define optindval() (voptind.text + 7)
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#ifndef SMALL
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#define histsizeval() (vhistsize.text + 9)
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#define termval() (vterm.text + 5)
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#endif
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#define mpathset() ((vmpath.flags & VUNSET) == 0)
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void initvar(void);
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void setvar(const char *, const char *, int);
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void setvareq(char *, int);
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struct strlist;
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void listsetvar(struct strlist *, int);
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char *lookupvar(const char *);
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char *bltinlookup(const char *, int);
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char **environment(void);
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void shprocvar(void);
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int showvars(const char *, int, int, const char *);
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void mklocal(const char *, int);
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void listmklocal(struct strlist *, int);
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void poplocalvars(void);
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int unsetvar(const char *, int);
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void choose_ps1(void);
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int setvarsafe(const char *, const char *, int);
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void print_quoted(const char *);
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#endif
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