Initial revision

1 files changed, 125 insertions, 0 deletions

diff --git a/lib/mkdir.c b/lib/mkdir.c
new file mode 100644
index 000000000..e68ccb17c
--- /dev/null
+++ b/lib/mkdir.c
@@ -0,0 +1,125 @@
+/* mkrmdir.c -- BSD compatible directory functions for System V
+   Copyright (C) 1988, 1990 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#ifndef STDC_HEADERS
+extern int errno;
+#endif
+
+/* mkdir and rmdir adapted from GNU tar.  */
+
+/* Make directory DPATH, with permission mode DMODE.
+
+   Written by Robert Rother, Mariah Corporation, August 1985
+   (sdcsvax!rmr or rmr@uscd).  If you want it, it's yours.
+
+   Severely hacked over by John Gilmore to make a 4.2BSD compatible
+   subroutine.	11Mar86; hoptoad!gnu
+
+   Modified by rmtodd@uokmax 6-28-87 -- when making an already existing dir,
+   subroutine didn't return EEXIST.  It does now.  */
+
+int
+mkdir (dpath, dmode)
+     char *dpath;
+     int dmode;
+{
+  int cpid, status;
+  struct stat statbuf;
+
+  if (stat (dpath, &statbuf) == 0)
+    {
+      errno = EEXIST;		/* stat worked, so it already exists.  */
+      return -1;
+    }
+
+  /* If stat fails for a reason other than non-existence, return error.  */
+  if (errno != ENOENT)
+    return -1;
+
+  cpid = fork ();
+  switch (cpid)
+    {
+    case -1:			/* Cannot fork.  */
+      return -1;		/* errno is set already.  */
+
+    case 0:			/* Child process.  */
+      /* Cheap hack to set mode of new directory.  Since this child
+	 process is going away anyway, we zap its umask.
+	 This won't suffice to set SUID, SGID, etc. on this
+	 directory, so the parent process calls chmod afterward.  */
+      status = umask (0);	/* Get current umask.  */
+      umask (status | (0777 & ~dmode));	/* Set for mkdir.  */
+      execl ("/bin/mkdir", "mkdir", dpath, (char *) 0);
+      _exit (1);
+
+    default:			/* Parent process.  */
+      while (wait (&status) != cpid) /* Wait for kid to finish.  */
+	/* Do nothing.  */ ;
+
+      if (status & 0xFFFF)
+	{
+	  errno = EIO;		/* /bin/mkdir failed.  */
+	  return -1;
+	}
+      return chmod (dpath, dmode);
+    }
+}
+
+/* Remove directory DPATH.
+   Return 0 if successful, -1 if not.  */
+
+int
+rmdir (dpath)
+     char *dpath;
+{
+  int cpid, status;
+  struct stat statbuf;
+
+  if (stat (dpath, &statbuf) != 0)
+    return -1;			/* stat set errno.  */
+
+  if ((statbuf.st_mode & S_IFMT) != S_IFDIR)
+    {
+      errno = ENOTDIR;
+      return -1;
+    }
+
+  cpid = fork ();
+  switch (cpid)
+    {
+    case -1:			/* Cannot fork.  */
+      return -1;		/* errno is set already.  */
+
+    case 0:			/* Child process.  */
+      execl ("/bin/rmdir", "rmdir", dpath, (char *) 0);
+      _exit (1);
+
+    default:			/* Parent process.  */
+      while (wait (&status) != cpid) /* Wait for kid to finish.  */
+	/* Do nothing.  */ ;
+
+      if (status & 0xFFFF)
+	{
+	  errno = EIO;		/* /bin/rmdir failed.  */
+	  return -1;
+	}
+      return 0;
+    }
+}