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#define FUSE_USE_VERSION 30
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <pwd.h>
#include <fuse.h>
static int usersfs_getattr(const char *path, struct stat *stbuf)
{
if (strcmp(path, "/") == 0) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
} else {
struct passwd *pwent = getpwnam(path + 1);
if (pwent && pwent->pw_dir) {
stbuf->st_mode = S_IFLNK | 0444;
stbuf->st_nlink = 1;
} else {
return -ENOENT;
}
}
return 0;
}
static int usersfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
if (strcmp(path, "/") != 0) {
return -ENOENT;
}
(void) offset;
(void) fi;
filler(buf, ".", NULL, 0);
filler(buf, "..", NULL, 0);
struct passwd *pwent;
setpwent();
while ((pwent = getpwent())) {
if ((pwent->pw_uid == 0 || pwent->pw_uid >= 1000) && pwent->pw_name && pwent->pw_dir) {
filler(buf, pwent->pw_name, NULL, 0);
}
}
setpwent();
return 0;
}
static int usersfs_readlink(const char *path, char *buf, size_t size)
{
if (strcmp(path, "/") == 0) {
return -EINVAL;
}
struct passwd *pwent = getpwnam(path + 1);
if (pwent && pwent->pw_dir) {
strcpy(buf, pwent->pw_dir);
return 0;
} else {
return -ENOENT;
}
}
static struct fuse_operations usersfs_oper = {
.getattr = usersfs_getattr,
.readdir = usersfs_readdir,
.readlink = usersfs_readlink
};
int main(int argc, char *argv[])
{
return fuse_main(argc, argv, &usersfs_oper, NULL);
}
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