freebsd-dev/usr.sbin/sade/variable.c
Jordan K. Hubbard b09dc169b7 Separate the siamese twins that were the partition and label editor.
Now you can use one without entering the other and it will DTRT.
These changes just allowed me to do the most straight-forward new disk
installation I've ever managed with sysinstall.
1997-10-12 16:21:21 +00:00

194 lines
4.9 KiB
C

/*
* 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 1.20 1997/06/13 14:21:22 jkh 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);
}
int
variable_cmp(char *var, char *value)
{
char *val;
if ((val = variable_get(var)))
return strcmp(val, value);
return -1;
}
void
variable_unset(char *var)
{
Variable *vp;
char name[512], *cp;
if ((cp = index(var, '=')) != NULL)
sstrncpy(name, var, cp - var);
else
SAFE_STRCPY(name, var);
unsetenv(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, name)) {
safe_free(VarHead->name);
safe_free(VarHead->value);
free(VarHead);
VarHead = NULL;
}
else {
for (vp = VarHead; vp; vp = vp->next) {
if (!strcmp(vp->name, name)) {
Variable *save = vp->next;
safe_free(vp->name);
safe_free(vp->value);
*vp = *save;
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;
}
/* Check if value passed in data (in the form "variable=value") is equal to value of
variable stored in env */
int
variable_check(char *data)
{
char *w, *cp, *cp2, *cp3, tmp[256];
w = data;
if (!w)
return FALSE;
SAFE_STRCPY(tmp, w);
if ((cp = index(tmp, '=')) != NULL) {
*(cp++) = '\0';
if ((cp3 = index(cp, ',')) != NULL)
*cp3 = '\0';
cp2 = getenv(tmp);
if (cp2)
return !strcmp(cp, cp2);
else
return FALSE;
}
else
return (int)getenv(tmp);
}