184 lines
4.1 KiB
C
184 lines
4.1 KiB
C
/*
|
|
* Copyright (c) 1980, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)vars.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
#endif /* not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "rcv.h"
|
|
#include "extern.h"
|
|
|
|
/*
|
|
* Mail -- a mail program
|
|
*
|
|
* Variable handling stuff.
|
|
*/
|
|
|
|
/*
|
|
* Assign a value to a variable.
|
|
*/
|
|
void
|
|
assign(const char *name, const char *value)
|
|
{
|
|
struct var *vp;
|
|
int h;
|
|
|
|
h = hash(name);
|
|
vp = lookup(name);
|
|
if (vp == NULL) {
|
|
if ((vp = calloc(1, sizeof(*vp))) == NULL)
|
|
err(1, "Out of memory");
|
|
vp->v_name = vcopy(name);
|
|
vp->v_link = variables[h];
|
|
variables[h] = vp;
|
|
}
|
|
else
|
|
vfree(vp->v_value);
|
|
vp->v_value = vcopy(value);
|
|
}
|
|
|
|
/*
|
|
* Free up a variable string. We do not bother to allocate
|
|
* strings whose value is "" since they are expected to be frequent.
|
|
* Thus, we cannot free same!
|
|
*/
|
|
void
|
|
vfree(char *cp)
|
|
{
|
|
if (*cp != '\0')
|
|
(void)free(cp);
|
|
}
|
|
|
|
/*
|
|
* Copy a variable value into permanent (ie, not collected after each
|
|
* command) space. Do not bother to alloc space for ""
|
|
*/
|
|
|
|
char *
|
|
vcopy(const char *str)
|
|
{
|
|
char *new;
|
|
unsigned len;
|
|
|
|
if (*str == '\0')
|
|
return ("");
|
|
len = strlen(str) + 1;
|
|
if ((new = malloc(len)) == NULL)
|
|
err(1, "Out of memory");
|
|
bcopy(str, new, (int)len);
|
|
return (new);
|
|
}
|
|
|
|
/*
|
|
* Get the value of a variable and return it.
|
|
* Look in the environment if its not available locally.
|
|
*/
|
|
|
|
char *
|
|
value(const char *name)
|
|
{
|
|
struct var *vp;
|
|
|
|
if ((vp = lookup(name)) == NULL)
|
|
return (getenv(name));
|
|
return (vp->v_value);
|
|
}
|
|
|
|
/*
|
|
* Locate a variable and return its variable
|
|
* node.
|
|
*/
|
|
|
|
struct var *
|
|
lookup(const char *name)
|
|
{
|
|
struct var *vp;
|
|
|
|
for (vp = variables[hash(name)]; vp != NULL; vp = vp->v_link)
|
|
if (*vp->v_name == *name && equal(vp->v_name, name))
|
|
return (vp);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Locate a group name and return it.
|
|
*/
|
|
|
|
struct grouphead *
|
|
findgroup(char name[])
|
|
{
|
|
struct grouphead *gh;
|
|
|
|
for (gh = groups[hash(name)]; gh != NULL; gh = gh->g_link)
|
|
if (*gh->g_name == *name && equal(gh->g_name, name))
|
|
return (gh);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Print a group out on stdout
|
|
*/
|
|
void
|
|
printgroup(char name[])
|
|
{
|
|
struct grouphead *gh;
|
|
struct group *gp;
|
|
|
|
if ((gh = findgroup(name)) == NULL) {
|
|
printf("\"%s\": not a group\n", name);
|
|
return;
|
|
}
|
|
printf("%s\t", gh->g_name);
|
|
for (gp = gh->g_list; gp != NULL; gp = gp->ge_link)
|
|
printf(" %s", gp->ge_name);
|
|
printf("\n");
|
|
}
|
|
|
|
/*
|
|
* Hash the passed string and return an index into
|
|
* the variable or group hash table.
|
|
*/
|
|
int
|
|
hash(const char *name)
|
|
{
|
|
int h = 0;
|
|
|
|
while (*name != '\0') {
|
|
h <<= 2;
|
|
h += *name++;
|
|
}
|
|
if (h < 0 && (h = -h) < 0)
|
|
h = 0;
|
|
return (h % HSHSIZE);
|
|
}
|