From d1e063beb43e595680c65e3804d1f8ddff53373b Mon Sep 17 00:00:00 2001
From: Guido Guenther <agx@sigxcpu.org>
Date: Sat, 18 Nov 2006 23:48:07 +0100
Subject: Imported Debian version 0.3.8.8

---
 ext2load/conffile.c | 172 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 172 insertions(+)
 create mode 100644 ext2load/conffile.c

(limited to 'ext2load/conffile.c')

diff --git a/ext2load/conffile.c b/ext2load/conffile.c
new file mode 100644
index 0000000..518ccf1
--- /dev/null
+++ b/ext2load/conffile.c
@@ -0,0 +1,172 @@
+/*
+ * 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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