150 lines
4.0 KiB
C
150 lines
4.0 KiB
C
/*
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* The new sysinstall program.
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*
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* This is probably the last program in the `sysinstall' line - the next
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* generation being essentially a complete rewrite.
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*
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* $Id: variable.c,v 1.12 1996/12/09 08:22:19 jkh Exp $
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*
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* Copyright (c) 1995
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* Jordan Hubbard. All rights reserved.
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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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* verbatim and that no modifications are made prior to this
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* point in the file.
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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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*
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* THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``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 JORDAN HUBBARD OR HIS PETS 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, LIFE 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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*/
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#include "sysinstall.h"
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/* Routines for dealing with variable lists */
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static void
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make_variable(char *var, char *value)
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{
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Variable *vp;
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/* Put it in the environment in any case */
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setenv(var, value, 1);
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/* Now search to see if it's already in the list */
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for (vp = VarHead; vp; vp = vp->next) {
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if (!strcmp(vp->name, var)) {
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if (isDebug())
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msgDebug("variable %s was %s, now %s\n", vp->name, vp->value, value);
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free(vp->value);
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vp->value = strdup(value);
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return;
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}
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}
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/* No? Create a new one */
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vp = (Variable *)safe_malloc(sizeof(Variable));
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vp->name = strdup(var);
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vp->value = strdup(value);
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vp->next = VarHead;
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VarHead = vp;
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if (isDebug())
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msgDebug("Setting variable %s to %s\n", vp->name, vp->value);
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}
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void
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variable_set(char *var)
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{
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char tmp[1024], *cp;
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if (!var)
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msgFatal("NULL variable name & value passed.");
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else if (!*var)
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msgDebug("Warning: Zero length name & value passed to variable_set()\n");
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SAFE_STRCPY(tmp, var);
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if ((cp = index(tmp, '=')) == NULL)
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msgFatal("Invalid variable format: %s", var);
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*(cp++) = '\0';
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make_variable(tmp, cp);
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}
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void
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variable_set2(char *var, char *value)
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{
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if (!var || !value)
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msgFatal("Null name or value passed to set_variable2!");
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else if (!*var || !*value)
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msgDebug("Warning: Zero length name or value passed to variable_set2()\n");
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make_variable(var, value);
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}
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char *
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variable_get(char *var)
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{
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return getenv(var);
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}
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void
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variable_unset(char *var)
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{
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Variable *vp;
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char name[512], *cp;
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unsetenv(var);
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if ((cp = index(var, '=')) != NULL) {
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sstrncpy(name, cp, cp - var);
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var = name;
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}
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/* Now search to see if it's in our list, if we have one.. */
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if (!VarHead)
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return;
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else if (!VarHead->next && !strcmp(VarHead->name, var)) {
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safe_free(VarHead->name);
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safe_free(VarHead->value);
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free(VarHead);
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VarHead = NULL;
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}
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else {
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for (vp = VarHead; vp; vp = vp->next) {
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if (!strcmp(vp->name, var)) {
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Variable *save = vp->next;
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*vp = *save;
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safe_free(save->name);
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safe_free(save->value);
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safe_free(save);
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break;
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}
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}
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}
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}
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/* Prompt user for the name of a variable */
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char *
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variable_get_value(char *var, char *prompt)
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{
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char *cp;
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if ((cp = msgGetInput(variable_get(var), prompt)) != NULL)
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variable_set2(var, cp);
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else
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cp = NULL;
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return cp;
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}
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