[project @ 1998-04-22 12:44:36 by sof]

[ghc-hetmet.git] / ghc / lib / std / cbits / directoryAux.lc

diff --git a/ghc/lib/std/cbits/directoryAux.lc b/ghc/lib/std/cbits/directoryAux.lc
new file mode 100644 (file)
index 0000000..2b352c3
--- /dev/null
+++ b/ghc/lib/std/cbits/directoryAux.lc
@@ -0,0 +1,74 @@
+%
+% (c) The GRASP/AQUA Project, Glasgow University, 1998
+%
+\subsection[directoryAux.lc]{Support functions for manipulating directories}
+
+\begin{code}
+
+#include "rtsdefs.h"
+#include "stgio.h"
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+
+StgAddr
+openDir__(path)
+StgByteArray path;
+{
+    struct stat sb;
+    DIR *dir;
+
+    /* Check for an actual directory */
+    while (stat(path, &sb) != 0) {
+       if (errno != EINTR) {
+           cvtErrno();
+           stdErrno();
+           return NULL;
+       }
+    }
+    if (!S_ISDIR(sb.st_mode)) {
+       ghc_errtype = ERR_INAPPROPRIATETYPE;
+       ghc_errstr = "not a directory";
+       return NULL;
+    }
+
+    while ((dir = opendir(path)) == NULL) {
+       if (errno != EINTR) {
+           cvtErrno();
+           stdErrno();
+           return NULL;
+       }
+    }
+    return dir;
+}
+
+StgAddr
+readDir__(dir)
+StgAddr dir;
+{
+   struct dirent *d;
+   while ((d = readdir((DIR*)dir)) == NULL) {
+    if (errno == 0) {
+       (void) closedir((DIR*)dir);
+       return NULL;
+    } else if (errno != EINTR) {
+        cvtErrno();
+        stdErrno();
+       (void) closedir((DIR*)dir);
+       return 1;
+    }
+    errno = 0;
+  }
+  return d;
+}
+
+\end{code}