rename to volumefs/userfs and add systemd unit files

1 files changed, 78 insertions, 0 deletions

diff --git a/src/userfs.c b/src/userfs.c
new file mode 100644
index 0000000..bb76ed1
--- /dev/null
+++ b/src/userfs.c
@@ -0,0 +1,78 @@
+#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);
+}