1 files changed, 92 insertions, 0 deletions
diff --git a/src/directory.c b/src/directory.c
new file mode 100644
index 0000000..2d4d565
--- /dev/null
+++ b/src/directory.c
@@ -0,0 +1,92 @@
+/*************************************************
+*     Exim - an Internet mail transport agent    *
+*************************************************/
+
+/* Copyright (c) University of Cambridge 1995 - 2009 */
+/* Copyright (c) The Exim Maintainers 2010 - 2018 */
+/* See the file NOTICE for conditions of use and distribution. */
+
+#include "exim.h"
+
+
+/*************************************************
+*           Attempt to create a directory        *
+*************************************************/
+
+/* All the directories that Exim ever creates for itself are within the spool
+directory as defined by spool_directory. We are prepared to create as many as
+necessary from that directory downwards, inclusive. However, directory creation
+can also be required in appendfile and sieve filters. The making function
+therefore has a parent argument, below which the new directories are to go. It
+can be NULL if the name is absolute.
+
+If a non-root uid has been specified for exim, and we are currently running as
+root, ensure the directory is owned by the non-root id if the parent is the
+spool directory.
+
+Arguments:
+  parent    parent directory name; if NULL the name must be absolute
+  name      directory name within the parent that we want
+  mode      mode for the new directory
+  panic     if TRUE, panic on failure
+
+Returns:    panic on failure if panic is set; otherwise return FALSE;
+            TRUE on success.
+*/
+
+BOOL
+directory_make(const uschar *parent, const uschar *name,
+               int mode, BOOL panic)
+{
+BOOL use_chown = parent == spool_directory && geteuid() == root_uid;
+uschar * p;
+uschar c = 1;
+struct stat statbuf;
+uschar * path;
+
+if (parent)
+  {
+  path = string_sprintf("%s%s%s", parent, US"/", name);
+  p = path + Ustrlen(parent);
+  }
+else
+  {
+  path = string_copy(name);
+  p = path + 1;
+  }
+
+/* Walk the path creating any missing directories */
+
+while (c && *p)
+  {
+  while (*p && *p != '/') p++;
+  c = *p;
+  *p = '\0';
+  if (Ustat(path, &statbuf) != 0)
+    {
+    if (mkdir(CS path, mode) < 0 && errno != EEXIST)
+      { p = US"create"; goto bad; }
+
+    /* Set the ownership if necessary. */
+
+    if (use_chown && exim_chown(path, exim_uid, exim_gid))
+      { p = US"set owner on"; goto bad; }
+
+    /* It appears that any mode bits greater than 0777 are ignored by
+    mkdir(), at least on some operating systems. Therefore, if the mode
+    contains any such bits, do an explicit mode setting. */
+
+    if (mode & 0777000) (void) Uchmod(path, mode);
+    }
+  *p++ = c;
+  }
+
+return TRUE;
+
+bad:
+  if (panic) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
+    "Failed to %s directory \"%s\": %s\n", p, path, strerror(errno));
+  return FALSE;
+}
+
+/* End of directory.c */