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Diffstat (limited to 'sh/var.h')
| -rw-r--r-- | sh/var.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/sh/var.h b/sh/var.h new file mode 100644 index 0000000..b7b7db8 --- /dev/null +++ b/sh/var.h @@ -0,0 +1,131 @@ +/* $NetBSD: var.h,v 1.23 2004/10/02 12:16:53 dsl 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 0x01 /* variable is exported */ +#define VREADONLY 0x02 /* variable cannot be modified */ +#define VSTRFIXED 0x04 /* variable struct is statically allocated */ +#define VTEXTFIXED 0x08 /* text is statically 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 */ +#define VNOSET 0x80 /* do not set variable - just readonly test */ + + +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 */ +}; + + +struct localvar *localvars; + +#if ATTY +extern struct var vatty; +#endif +extern struct var vifs; +extern struct var vmpath; +extern struct var vpath; +extern struct var vps1; +extern struct var vps2; +extern struct var vps4; +#ifdef WITH_HISTORY +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 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) +#ifdef WITH_HISTORY +#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 *, int); +char *lookupvar(const char *); +char *bltinlookup(const char *, int); +char **environment(void); +void shprocvar(void); +int showvars(const char *, int, int); +int exportcmd(int, char **); +int localcmd(int, char **); +void mklocal(const char *, int); +void listmklocal(struct strlist *, int); +void poplocalvars(void); +int setvarcmd(int, char **); +int unsetcmd(int, char **); +int unsetvar(const char *, int); +int setvarsafe(const char *, const char *, int); +void print_quoted(const char *); |