1 files changed, 121 insertions, 0 deletions
diff --git a/system_part.c b/system_part.c
new file mode 100644
index 0000000..aaf2301
--- /dev/null
+++ b/system_part.c
@@ -0,0 +1,121 @@
+#ifndef VOLGIT_SYSTEM_PART_C
+#define VOLGIT_SYSTEM_PART_C VOLGIT_SYSTEM_PART_C
+#include <system_part.h>
+
+const char *default_header="<!DOCTYPE html><html><head><title>GIT</title></head><body>";
+const char *default_footer="</body></html>";
+
+struct Volgit_Options options;
+
+void parse_options(int argc,char **argv)
+{
+
+	options.header=default_header;
+	options.footer=default_footer;
+	switch(argc)
+	{
+		case 5:
+			options.header=read_file(argv[3]);
+			options.footer=read_file(argv[4]);
+		/*falltrough*/
+		case 3:
+			options.input_path=argv[1];
+			options.output_path=argv[2];
+			break;
+		default:
+			die("Usage: volgit source destination [ file-containint-header file-containing-footer ]\n");
+	}
+
+	options.output_dir_fd=open(options.output_path,O_RDONLY|O_DIRECTORY);
+	if(options.output_dir_fd==-1)
+	{
+		mkdir(options.output_path,0770);
+		options.output_dir_fd=open(options.output_path,O_RDONLY|O_DIRECTORY);
+		if(options.output_dir_fd==-1)
+			die("Could not open output dir\n");
+	}
+}
+char* read_file(const char *filename)
+{
+	long file_size;
+	int file;
+	char *ret;
+	struct stat file_stats;
+
+	file=open(filename,O_RDONLY|O_CREAT);
+	if(file==-1)
+		die("Could not open file %s\n",filename);
+
+	fstat(file,&file_stats);
+
+	ret=malloc(file_stats.st_size+1);
+
+	if(ret==NULL)
+		die("Ran out of memory!\n");
+
+	close(file);
+	return ret;
+}
+
+int create_branch_dir(const char *branch_name)
+{
+	int ret=0;
+
+	ret=openat(options.output_dir_fd,branch_name,O_DIRECTORY|O_RDONLY);	
+	if(ret==-1)
+	{
+		if(mkdirat(options.output_dir_fd,branch_name,0770)==-1)
+			die("Could not create branch directory for %s\n",branch_name);
+
+		ret=openat(options.output_dir_fd,branch_name,O_DIRECTORY|O_RDONLY);	
+		if(ret==-1)
+			die("Could not open newly created directory for branch %s\n",branch_name);
+	}
+
+	return ret;
+}
+FILE* create_file(int branch_dir,const char *filename)
+{
+	int fd;
+	unlinkat(branch_dir,filename,0);
+	fd=openat(branch_dir,filename,O_CREAT|O_RDWR,0660);
+	if(fd==-1)
+		die("Could not open the file '%s' for one of the branches\n",filename);
+	return fdopen(fd,"w");
+}
+int create_files_dir(int branch_dir)
+{
+	int ret;
+
+	ret=openat(branch_dir,"files",O_DIRECTORY|O_RDONLY);	
+	if(ret!=-1)
+		return ret;
+
+	ret=mkdirat(branch_dir,"files",0770);
+	if(ret==-1)
+		die("Could not create the 'files' subdirectory of one of the branch dirs\n");
+
+	return ret;
+}
+int create_diff_dir(int branch_dir)
+{
+	int ret;
+
+	ret=openat(branch_dir,"diffs",O_DIRECTORY|O_RDONLY);	
+	if(ret!=-1)
+		return ret;
+	mkdirat(branch_dir,"diffs",0770);
+	ret=openat(branch_dir,"diffs",O_DIRECTORY|O_RDONLY);	
+	if(ret==-1)
+		die("Could not create the 'diffs' subdirectory of one of the branch dirs\n");
+	return ret;
+}
+
+void die(const char *format, ...)
+{
+	va_list args;
+	va_start(args,format);
+	vfprintf(stderr,format,args);
+	exit(1);
+}
+#endif