/* * 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 1.6.2.7 1995/10/26 08:56:18 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Jordan Hubbard * for the FreeBSD Project. * 4. The name of Jordan Hubbard or the FreeBSD project may not be used to * endorse or promote products derived from this software without specific * prior written permission. * * 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 *newvar; /* Put it in the environment in any case */ setenv(var, value, 1); /* Now search to see if it's already in the list */ for (newvar = VarHead; newvar; newvar = newvar->next) { if (!strcmp(newvar->name, var)) { strncpy(newvar->value, value, VAR_VALUE_MAX); return; } } /* No? Create a new one */ newvar = (Variable *)safe_malloc(sizeof(Variable)); strncpy(newvar->name, var, VAR_NAME_MAX); strncpy(newvar->value, value, VAR_VALUE_MAX); newvar->next = VarHead; VarHead = newvar; if (isDebug()) msgDebug("Setting variable %s to %s\n", newvar->name, newvar->value); } void variable_set(char *var) { char tmp[VAR_NAME_MAX + VAR_VALUE_MAX], *cp; if (!var) msgFatal("NULL variable name & value passed."); else if (!*var) msgDebug("Warning: Zero length name & value passed to variable_set()\n"); strncpy(tmp, var, VAR_NAME_MAX + VAR_VALUE_MAX); if ((cp = index(tmp, '=')) == NULL) msgFatal("Invalid variable format: %s", var); *(cp++) = '\0'; make_variable(tmp, 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; unsetenv(var); /* 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)) { 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); break; } } } } /* Prompt user for the name of a variable */ char * variable_get_value(char *var, char *prompt) { char *cp; dialog_clear(); if ((cp = msgGetInput(variable_get(var), prompt)) != NULL) variable_set2(var, cp); else cp = NULL; dialog_clear(); return cp; }