lib: c: io: implement getdents()

lib/libc/include/dirent.h

@@ -0,0 +1,13 @@
+#ifndef DIRENT_H_
+#define DIRENT_H_
+
+#define DT_UNKNOWN 0
+#define DT_BLK     1
+#define DT_CHR     2
+#define DT_DIR     3
+#define DT_FIFO    4
+#define DT_LNK     5
+#define DT_REG     6
+#define DT_SOCK    7
+
+#endif

lib/libc/include/sys/types.h

@@ -7,4 +7,11 @@
 #define SEEK_CUR 1
 #define SEEK_END 2
 
+struct dentry {
+	unsigned long d_ino;
+	unsigned short d_reclen;
+	char d_type;
+	char d_name[];
+};
+
 #endif

lib/libc/include/unistd.h

@@ -12,4 +12,6 @@ extern int write(int fd, const void *buf, size_t count);
 
 extern off_t lseek(int fd, off_t offset, int whence);
 
+extern long getdents(int fd, struct dentry *dirp, unsigned int count);
+
 #endif

lib/libc/io/unistd/getdents.c

@@ -0,0 +1,22 @@
+#include <errno.h>
+#include <mango/handle.h>
+#include <mango/msg.h>
+#include <rosetta/fs.h>
+#include <sys/remote.h>
+#include <sys/types.h>
+
+int getdents(int fd, struct dentry *dirp, unsigned int count)
+{
+	int err;
+	size_t nr_read = 0;
+	kern_status_t status = fs_getdents(fd, &err, dirp, count, &nr_read);
+	if (status != KERN_OK) {
+		return __set_errno(__errno_from_kern_status(status));
+	}
+
+	if (err != SUCCESS) {
+		return __set_errno(err);
+	}
+
+	return nr_read;
+}