Getdents implementation in library/vfs/mfs.

Changed readdir, etc. to use getdents

lib/other/Makefile.in

@@ -10,6 +10,7 @@ libc_FILES=" \
 	_cprofile.c \
 	_devctl.c \
 	__pm_findproc.c \
+	_getdents.c \
 	_getnpid.c \
 	_getsigset.c \
 	_getnprocnr.c \

lib/other/_getdents.c

@@ -0,0 +1,16 @@
+#include <lib.h>
+#define getdents _getdents
+#include <dirent.h>
+
+PUBLIC ssize_t getdents(fd, buffer, nbytes)
+int fd;
+struct dirent *buffer;
+size_t nbytes;
+{
+  message m;
+
+  m.m1_i1 = fd;
+  m.m1_i2 = nbytes;
+  m.m1_p1 = (char *) buffer;
+  return _syscall(FS, GETDENTS, &m);
+}

lib/other/_seekdir.c

@@ -19,14 +19,8 @@ int seekdir(DIR *dp, off_t pos)
 	if (dp == nil) { errno= EBADF; return -1; }
 
 	dp->_count= 0;
-	dp->_ptr= dp->_buf;
 
-	off= pos & (sizeof(dp->_buf) - 1);
-	dp->_pos= pos - off;
-
-	if (lseek(dp->_fd, dp->_pos, SEEK_SET) == -1) return -1;
-
-	while (dp->_pos < pos && readdir(dp) != nil) {}
+	if (lseek(dp->_fd, pos, SEEK_SET) == -1) return -1;
 
 	return 0;
 }

lib/other/telldir.c

@@ -6,11 +6,22 @@
 #include <sys/types.h>
 #include <dirent.h>
 #include <errno.h>
+#include <unistd.h>
 
 off_t telldir(DIR *dp)
 /* Return the current read position in a directory. */
 {
+	struct dirent *dep;
+
 	if (dp == nil) { errno= EBADF; return -1; }
 
-	return dp->_pos;
+	if (dp->_pos < dp->_count)
+	{
+		/* Use position in next entry */
+		dep= (struct dirent *)&dp->_buf[dp->_pos];
+		return dep->d_off;
+	}
+
+	/* Get current offset in directory */
+	return lseek(dp->_fd, 0, SEEK_CUR);
 }