FreeBSD-5.3/usr.sbin/sysinstall/variable.c
/*
* The new sysinstall program.
*
* This is probably the last program in the `sysinstall' line - the next
* generation being essentially a complete rewrite.
*
* $FreeBSD: src/usr.sbin/sysinstall/variable.c,v 1.37 2004/03/11 11:58:16 bde Exp $
*
* Copyright (c) 1995
* Jordan Hubbard. All rights reserved.
* Copyright (c) 2001
* Murray Stokely. 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, int dirty)
{
Variable *vp;
/* Trim leading and trailing whitespace */
var = string_skipwhite(string_prune(var));
if (!var || !*var)
return;
/* Now search to see if it's already in the list */
for (vp = VarHead; vp; vp = vp->next) {
if (!strcmp(vp->name, var)) {
if (vp->dirty && !dirty)
return;
setenv(var, value, 1);
free(vp->value);
vp->value = strdup(value);
if (dirty != -1)
vp->dirty = dirty;
return;
}
}
setenv(var, value, 1);
/* No? Create a new one */
vp = (Variable *)safe_malloc(sizeof(Variable));
vp->name = strdup(var);
vp->value = strdup(value);
if (dirty == -1)
dirty = 0;
vp->dirty = dirty;
vp->next = VarHead;
VarHead = vp;
}
void
variable_set(char *var, int dirty)
{
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), dirty);
}
void
variable_set2(char *var, char *value, int dirty)
{
if (!var || !value)
msgFatal("Null name or value passed to set_variable2(%s) = %s!",
var ? var : "", value ? value : "");
else if (!*var || !*value)
msgDebug("Warning: Zero length name or value passed to variable_set2(%s) = %s\n",
var, value);
make_variable(var, value, dirty);
}
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, int dirty)
{
char *cp;
cp = variable_get(var);
if (cp && variable_get(VAR_NONINTERACTIVE))
return cp;
else if ((cp = msgGetInput(cp, "%s", prompt)) != NULL)
variable_set2(var, cp, dirty);
else
cp = NULL;
return cp;
}
/* Check if value passed in data (in the form "variable=value") is
* valid, and it's status compared to the value of variable stored in
* env
*
* Possible return values :
* -3: Invalid line, the data string is NOT set as an env variable
* -2: Invalid line, the data string is set as an env variable
* -1: Invalid line
* 0: Valid line, is NOT equal to env version
* 1: Valid line, is equal to env version
* 2: Valid line, value empty - e.g. foo=""
* 3: Valid line, does not exist in env
*/
int
variable_check2(char *data)
{
char *cp, *cp2, *cp3, tmp[256];
if (data == NULL)
return -1;
SAFE_STRCPY(tmp, data);
if ((cp = index(tmp, '=')) != NULL) {
*(cp++) = '\0';
if (*cp == '"') { /* smash quotes if present */
++cp;
if ((cp3 = index(cp, '"')) != NULL)
*cp3 = '\0';
}
else if ((cp3 = index(cp, ',')) != NULL)
*cp3 = '\0';
cp2 = variable_get(tmp);
if (cp2 != NULL) {
if (*cp == '\0')
return 2;
else
return strcmp(cp, cp2) == 0 ? 1 : 0;
}
else
return 3;
}
else
return variable_get(tmp) != NULL ? -2 : -3;
}
/* Check if the value passed in data (in the form "variable=value") is
equal to the value of variable stored in env */
int
variable_check(char *data)
{
int ret;
ret = variable_check2(data);
switch(ret) {
case -2:
case 1:
case 2:
return TRUE;
/* NOT REACHED */
default:
return FALSE;
}
}
int
dump_variables(dialogMenuItem *unused)
{
FILE *fp;
Variable *vp;
if (isDebug())
msgDebug("Writing sysinstall variables to file..\n");
fp = fopen("/etc/sysinstall.vars", "w");
if (!fp) {
msgConfirm("Unable to write to /etc/sysinstall.vars: %s",
strerror(errno));
return DITEM_FAILURE;
}
for (vp = VarHead; vp; vp = vp->next)
fprintf(fp, "%s=\"%s\" (%d)\n", vp->name, vp->value, vp->dirty);
fclose(fp);
return DITEM_SUCCESS;
}
/* Free all of the variables, useful to really start over as when the
user selects "restart" from the interrupt menu. */
void
free_variables(void)
{
Variable *vp;
/* Free the variables from our list, if we have one.. */
if (!VarHead)
return;
else if (!VarHead->next) {
unsetenv(VarHead->name);
safe_free(VarHead->name);
safe_free(VarHead->value);
free(VarHead);
VarHead = NULL;
}
else {
for (vp = VarHead; vp; ) {
Variable *save = vp;
unsetenv(vp->name);
safe_free(vp->name);
safe_free(vp->value);
vp = vp->next;
safe_free(save);
}
VarHead = NULL;
}
}
/*
* Persistent variables. The variables modified by these functions
* are not cleared between invocations of sysinstall. This is useful
* to allow the user to completely restart sysinstall, without having
* it load all of the modules again from the installation media which
* are still in memory.
*/
void
pvariable_set(char *var)
{
char tmp[1024];
if (!var)
msgFatal("NULL variable name & value passed.");
else if (!*var)
msgDebug("Warning: Zero length name & value passed to variable_set()\n");
/* Add a trivial namespace to whatever name the caller chooses. */
SAFE_STRCPY(tmp, "SYSINSTALL_PVAR");
if (index(var, '=') == NULL)
msgFatal("Invalid variable format: %s", var);
strlcat(tmp, var, 1024);
putenv(tmp);
}
char *
pvariable_get(char *var)
{
char tmp[1024];
SAFE_STRCPY(tmp, "SYSINSTALL_PVAR");
strlcat(tmp, var, 1024);
return getenv(tmp);
}