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/*
* Copyright 2006 Eduard Bloch
*
* This code emulates the interface of the original defaults.c file. However,
* it improves its behaviour and deals with corner cases: prepended and
* trailing spaces on variable and value, no requirement for using TABs
* anymore. No requirements to insert dummy values like -1 or "".
*
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <mconfig.h>
#include <stdlib.h>
#include <stdio.h>
#include <deflts.h>
#include <ctype.h>
#include <string.h>
#define CFGPATH "/etc/wodim.conf"
/* The better way would be exporting the meta functions to getnum.h or so */
extern int getnum(char *arg, long *valp);
void
cdr_defaults(char **p_dev_name, int *p_speed, long *p_fifosize,
char **p_drv_opts)
{
char *t; /* tmp */
int wc=0;
char loc[256], sSpeed[11], sFs[11], sOpts[81];
char *devcand=NULL;
cfg_open(CFGPATH);
if(p_dev_name && *p_dev_name)
devcand=*p_dev_name;
else if(NULL!=(t=getenv("CDR_DEVICE")))
devcand=t;
else if(NULL!=(t=cfg_get("CDR_DEVICE")))
devcand=strdup(t); /* needs to use it as a key later, same stat. memory */
if(devcand && NULL != (t=cfg_get(devcand))) {
/* extract them now, may be used later */
wc=sscanf(t, "%255s %10s %10s %80s", loc, sSpeed, sFs, sOpts);
}
if(p_dev_name) {
if(wc>0)
*p_dev_name = strdup(loc);
else if(devcand) /* small mem. leak possible, does not matter, checks for that would require more code size than we loose */
*p_dev_name=strdup(devcand);
}
if(p_speed) { /* sth. to write back */
char *bad;
int cfg_speed=-1;
/* that value may be used twice */
if(NULL!=(t=cfg_get("CDR_SPEED"))) {
cfg_speed=strtol(t,&bad,10);
if(*bad || cfg_speed<-1) {
fprintf(stderr, "Bad default CDR_SPEED setting (%s).\n", t);
exit(EXIT_FAILURE);
}
}
if(*p_speed>0) {
/* ok, already set by the program arguments */
}
else if(NULL!=(t=getenv("CDR_SPEED"))) {
*p_speed=strtol(t,&bad,10);
if(*bad || *p_speed<-1) {
fprintf(stderr, "Bad CDR_SPEED environment (%s).\n", t);
exit(EXIT_FAILURE);
}
}
else if(wc>1 && *sSpeed) {
*p_speed=strtol(sSpeed, &bad, 10);
if(*bad || *p_speed<-1) {
fprintf(stderr, "Bad speed (%s) in the config, drive description.\n", sSpeed);
exit(EXIT_FAILURE);
}
if(*p_speed==-1)
/* that's autodetect, use the config default as last ressort */
*p_speed=cfg_speed;
}
else
*p_speed=cfg_speed;
}
if(p_fifosize) { /* sth. to write back */
if(*p_fifosize>0) {
/* ok, already set by the user */
}
else if(NULL!=(t=getenv("CDR_FIFOSIZE"))) {
if(getnum(t, p_fifosize)!=1 || *p_fifosize<-1) {
fprintf(stderr, "Bad CDR_FIFOSIZE environment (%s).\n", t);
exit(EXIT_FAILURE);
}
}
else if(wc>2 && *sFs && strcmp("-1", sFs)) {
if(getnum(sFs, p_fifosize)!=1 || *p_fifosize<-1) {
fprintf(stderr, "Bad fifo size (%s) in the config, device description.\n", sFs);
exit(EXIT_FAILURE);
}
}
else if(NULL!=(t=cfg_get("CDR_FIFOSIZE"))) {
if(getnum(t, p_fifosize)!=1 || *p_fifosize<-1) {
fprintf(stderr, "Bad speed default setting (%s).\n", t);
exit(EXIT_FAILURE);
}
}
if(NULL!=(t=cfg_get("CDR_MAXFIFOSIZE"))) {
long max;
if(getnum(t, &max)!=1 || *p_fifosize<-1) {
fprintf(stderr, "Bad CDR_MAXFIFOSIZE setting (%s).\n", t);
exit(EXIT_FAILURE);
}
if(*p_fifosize>max)
*p_fifosize=max;
}
}
if(p_drv_opts && !*p_drv_opts && wc>3 && strcmp(sOpts, "\"\""))
*p_drv_opts=strdup(sOpts);
cfg_close();
}
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