Linux за българи: Форуми

#define _XOPEN_SOURCE 600
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <errno.h>
#include <fcntl.h>
#include <assert.h>
#include "npfs.h"

static Npfile* dirfirst(Npfile *);
static Npfile* dirnext(Npfile *, Npfile *);
static int confread(Npfilefid *, u64, u32, u8*, Npreq *);
static int confwrite(Npfilefid *, u64, u32, u8*, Npreq *);
static int confwstat(Npfile *, Npstat *);
static void connclose(Npconn *);

static Npsrv *srv;
static Npfile *root;
static Npfile *conf;

static Npdirops rootops = {
	.first = dirfirst,
	.next = dirnext,
};

static Npfileops confops = {
	.read = confread,
	.write = confwrite,
	.wstat = confwstat,
};

static int
fsstart(char *mntpt) {
	Npuser *user;
	char *opts, *s;

	user = np_unix_users->uid2user(np_unix_users, geteuid());
	root = npfile_alloc(NULL, strdup(""), 0755|Dmdir, 0, &rootops, NULL);
	root->parent = root;
	npfile_incref(root);
	root->atime = time(NULL);
	root->mtime = root->atime;
	root->uid = user;
	root->gid = user->dfltgroup;
	root->muid = user;

	conf = npfile_alloc(root, strdup("conf"), 0644, 1, &confops, NULL);
	npfile_incref(conf);
	root->dirfirst = conf;
	root->dirlast = conf;

	srv = np_pipesrv_create(1);
	if (!srv)
		return -1;

	npfile_init_srv(srv, root);
	np_pipesrv_mount(srv, mntpt, user->uname, 0, NULL);

	return 0;
}

static Npfile*
dirfirst(Npfile *dir)
{
	if (dir->dirfirst)
		npfile_incref(dir->dirfirst);

	return dir->dirfirst;
}

static Npfile* 
dirnext(Npfile *dir, Npfile *prevchild)
{
	if (prevchild->next)
		npfile_incref(prevchild->next);

	return prevchild->next;
}

static int
confread(Npfilefid* file, u64 offset, u32 count, u8* data, Npreq *req)
{
	char buf[128];

	/* print your configuration here */
	snprintf(buf, sizeof(buf), "tarator");
	len = strlen(buf);
	if (offset > len)
		return 0;

	if (offset+count > len)
		count = len - offset;

	memmove(data, buf+offset, count)
	return count;
}

static int
confwrite(Npfilefid* file, u64 offset, u32 count, u8* data, Npreq *req)
{
	/* the content is in data */
	return 0;
}

static int
confwstat(Npfile* file, Npstat* stat)
{
	return 1;
}