unistd, dirent: definitions for directory functions

include/dirent.h

@@ -0,0 +1,60 @@
+#ifndef __DIRENT_H__
+# define __DIRENT_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <bits/types/DIR.h>
+#include <sys/types.h>
+
+#define DT_UNKNOWN   0  /* Unknown type */
+#define DT_REG       1  /* Regular file */
+#define DT_DIR       2  /* Directory */
+
+/* In gint d_ino is unused; but it's required by POSIX.1. */
+struct dirent {
+    /* Inode number */
+    ino_t d_ino;
+    /* Type, to avoid doing an additional stat() on the file */
+    unsigned char d_type;
+    /* NUL-terminated file name */
+    char d_name[];
+};
+
+/* The underlying syscall to access directory entries is getdents(2). But it
+   has no unified interface and no glibc wrapper on Linux; it's basically
+   hidden. So we define the API directly at the level of readdir(3). gint does
+   not implement any lower-level interface and directly associates a DIR * with
+   a directory file descriptor. */
+
+/* Open a directory to inspect its contents. */
+extern DIR *opendir(const char *__name);
+
+/* Get the directory file descriptory associated with __dp. */
+extern int dirfd(DIR *__dp);
+
+/* Open a directory file descriptor to use as a directory stream. */
+extern DIR *fdopendir(int __fd);
+
+/* Read an entry from an open directory. */
+extern struct dirent *readdir(DIR *__dp);
+
+/* Get the current position within the directory. The particular value should
+   not be interpreted; it is just suitable to use in seekdir(). */
+extern long telldir(DIR *__dp);
+
+/* Seek into the directory; __pos should have been returned by telldir(). */
+extern void seekdir(DIR *__dp, long __pos);
+
+/* Rewind a directory to its start. */
+extern void rewinddir(DIR *__dp);
+
+/* Close an open directory. */
+extern int closedir(DIR *__dp);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__DIRENT_H__*/

include/errno.h

@@ -23,6 +23,8 @@ extern int errno;
 #define ENOTSUP   12   /* Operation not supported. */
 #define EBADF     13   /* Invalid file descriptor. */
 #define ESPIPE    14   /* File descriptor is unable to seek. */
+#define EISDIR    15   /* File descriptor is a directory. */
+#define ENOTDIR   16   /* File descriptor is not a directory. */
 
 #ifdef __cplusplus
 }

include/sys/types.h

@@ -25,6 +25,7 @@ typedef int32_t pid_t;
 typedef int16_t mode_t;
 typedef uint16_t dev_t;
 typedef uint16_t umode_t;
+typedef uint32_t ino_t;
 
 #ifdef __cplusplus
 }

include/target/gint/bits/types/DIR.h

@@ -0,0 +1,12 @@
+#ifndef __BITS_TYPES_DIR_H__
+# define __BITS_TYPES_DIR_H__
+
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct {
+	/* Associated directory descriptor */
+	int fd;
+} DIR;
+
+#endif /*__BITS_TYPES_DIR_H__*/

include/unistd.h

@@ -35,6 +35,12 @@ extern int close(int __fd);
 /* Remove a file. */
 extern int unlink(const char *__path);
 
+/* Create a directory. */
+extern int mkdir(const char *__path, mode_t __mode);
+
+/* Remove an empty directory. */
+extern int rmdir(const char *__path);
+
 
 /* Kernel-style functions supported only by Vhex. */
 

src/libc/string/strerror.c

@@ -17,6 +17,8 @@ static char *errno_strings [] = {
 	[ENOTSUP]  = "Operation not supported",
 	[EBADF]    = "Bad file descriptor",
 	[ESPIPE]   = "Illegal seek",
+	[EISDIR]   = "Is a directory",
+	[ENOTDIR]  = "Not a directory",
 };
 
 char *strerror(int e)