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/*
* The new sysinstall program.
*
* This is probably the last program in the `sysinstall' line - the next
* generation being essentially a complete rewrite.
*
* $Id: variable.c,v 1.17 1997/02/22 14:12:38 peter Exp $
*
* Copyright (c) 1995
* Jordan Hubbard. 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,
* verbatim and that no modifications are made prior to this
* point in the file.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``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 JORDAN HUBBARD OR HIS PETS 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, LIFE 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.
*
*/
#include "sysinstall.h"
/* Routines for dealing with variable lists */
static void
make_variable(char *var, char *value)
{
Variable *vp;
/* Trim leading and trailing whitespace */
var = string_skipwhite(string_prune(var));
if (!var || !*var)
return;
/* Put it in the environment in any case */
setenv(var, value, 1);
/* Now search to see if it's already in the list */
for (vp = VarHead; vp; vp = vp->next) {
if (!strcmp(vp->name, var)) {
if (isDebug())
msgDebug("variable %s was %s, now %s\n", vp->name, vp->value, value);
free(vp->value);
vp->value = strdup(value);
return;
}
}
/* No? Create a new one */
vp = (Variable *)safe_malloc(sizeof(Variable));
vp->name = strdup(var);
vp->value = strdup(value);
vp->next = VarHead;
VarHead = vp;
if (isDebug())
msgDebug("Setting variable %s to %s\n", vp->name, vp->value);
}
void
variable_set(char *var)
{
char tmp[1024], *cp;
if (!var)
msgFatal("NULL variable name & value passed.");
else if (!*var)
msgDebug("Warning: Zero length name & value passed to variable_set()\n");
SAFE_STRCPY(tmp, var);
if ((cp = index(tmp, '=')) == NULL)
msgFatal("Invalid variable format: %s", var);
*(cp++) = '\0';
make_variable(tmp, string_skipwhite(cp));
}
void
variable_set2(char *var, char *value)
{
if (!var || !value)
msgFatal("Null name or value passed to set_variable2!");
else if (!*var || !*value)
msgDebug("Warning: Zero length name or value passed to variable_set2()\n");
make_variable(var, value);
}
char *
variable_get(char *var)
{
return getenv(var);
}
void
variable_unset(char *var)
{
Variable *vp;
char name[512], *cp;
unsetenv(var);
if ((cp = index(var, '=')) != NULL) {
sstrncpy(name, cp, cp - var);
var = string_skipwhite(string_prune(name));
}
/* Now search to see if it's in our list, if we have one.. */
if (!VarHead)
return;
else if (!VarHead->next && !strcmp(VarHead->name, var)) {
safe_free(VarHead->name);
safe_free(VarHead->value);
free(VarHead);
VarHead = NULL;
}
else {
for (vp = VarHead; vp; vp = vp->next) {
if (!strcmp(vp->name, var)) {
Variable *save = vp->next;
*vp = *save;
safe_free(save->name);
safe_free(save->value);
safe_free(save);
break;
}
}
}
}
/* Prompt user for the name of a variable */
char *
variable_get_value(char *var, char *prompt)
{
char *cp;
cp = variable_get(var);
if (cp && variable_get(VAR_NONINTERACTIVE))
return cp;
else if ((cp = msgGetInput(cp, prompt)) != NULL)
variable_set2(var, cp);
else
cp = NULL;
return cp;
}
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