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/*
* Copyright 2001-2004 Guido Guenther <agx@sigxcpu.org>
*
* load arcboots configuration file and process the arguments
*
*/
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <types.h>
#include <sys/types.h>
#include <ext2_fs.h>
#include <ext2fs.h>
#include "arcboot.h"
#include <arc.h>
#define _PARM_LIMIT 32
static char *carray[_PARM_LIMIT+3]; /* 0 is the name,
1 the boofile, ...
X is OSLoadOptions
X+1 ... _PARM_LIMIT are options given on the
command line */
CHAR** GetConfig(char* config, char* name)
{
char *t, *start, *end;
int i;
/* Loop on lines */
while(*config != 0x0) {
start=config;
while(*config != 0xa && *config != 0x0) {
/* Delete comments */
if (*config == '#')
*config=0x0;
config++;
}
/* Did we stop at the end of a line ? */
if (*config == 0xa) {
/* Terminate Line */
*config=0x0;
config++;
}
/* Skip leading spaces and tabs */
while(*start == ' ' || *start == '\t')
start++;
/* If the start of a line is the end - Next line */
if (*start == 0x0)
continue;
/* get the end pointer */
end=&start[strlen(start)-1];
/* Delete spaces and tabs at the end of a line */
while(*end == ' ' || *end == '\t')
*end--=0x0;
if (strncmp("label=",start,6) == 0) {
/* If we found the right profile or want the first */
if (carray[0])
if (((strcmp(carray[0], name) == 0) && (strcmp(name, carray[0]) == 0))) {
return carray;
}
/* Reset image & append */
carray[1]=carray[2]=0;
carray[0]=&start[6];
} else if (strncmp("image=",start,6) == 0) {
carray[1]=&start[6];
} else if (strncmp("append=",start,7) == 0) {
t=&start[7];
/* Does append start with " */
if (*t == '"') {
t++;
/* If so - append starts +1 */
carray[2]=t;
/* Search ending quote */
while(*t != '"' && *t != 0x0)
t++;
/* And delete */
if (*t == '"')
*t=0x0;
} else
carray[2]=&start[7];
t=carray[2];
i=3;
while(i<_PARM_LIMIT && *t != 0x0) {
t++;
if (*t == ' ' || *t == '\t') {
*t++=0x0;
if (*t != 0x0)
carray[i++]=t;
}
}
}
}
if (carray[0])
if ((name == NULL) ||
(strcmp(carray[0], name) == 0)) {
return carray;
}
/* Found nothing appropriate: */
return NULL;
}
CHAR** ReadConfFile(char** partition, const char *filename, char* label)
{
ext2_file_t file;
unsigned size, num_read;
errcode_t status;
char *conf_file;
if(!OpenFile( *partition, filename, &file )){
/* OSLoadPartition seems to be wrong, but don't give up now */
int npart,i;
char *part,*spart;
/* the user wants to boot a file directly out of the filesystem
* don't try to fixup OSLoadPartition for him in this case */
if(label[0] == '/') {
return False;
}
printf("Can't open configuration file. Trying other partitions\n\r");
spart = ArcGetEnvironmentVariable("SystemPartition");
if(! spart ) {
printf("Couldn't get SystemPartition, weird.");
return False;
}
part = strdup(spart);
npart = part[strlen(part)-2] - '0';
for(i = 0; i < npart; i++) {
part[strlen(part)-2] = '0' + i;
#if DEBUG
printf("Trying %s\n\r", part);
#endif
/* we found it, good */
if(OpenFile( part, filename, &file )) {
printf("Please adjust OSLoadPartition to %s\n\r", part);
*partition = part;
break;
}
}
if( i == npart )
return False;
}
size = ext2fs_file_get_size(file);
conf_file = malloc(size);
if( !conf_file ) {
printf("Can't read configuration file - not enough memory\n\r");
return False;
}
status = ext2fs_file_read(file,(char*) conf_file, size, &num_read);
if( status ) {
print_ext2fs_error(status);
return False;
}
if( size != num_read ) {
printf("Wanted: %u, got %u bytes of configuration file\n\r", size, num_read);
return False;
}
return GetConfig(conf_file, label);
}
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