/*************************************************
*     Exim - an Internet mail transport agent    *
*************************************************/

/* Copyright (c) University of Cambridge 1995 - 1999 */
/* 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. 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(char *parent, char *name, int mode, BOOL panic)
{
BOOL use_chown =
  parent == spool_directory && exim_uid_set && geteuid() == root_uid;
char *p, *slash;
int c = 1;
struct stat statbuf;
char buffer[256];

if (parent == NULL)
  {
  p = buffer + 1;
  slash = parent = "";
  }
else
  {
  p = buffer + (int)strlen(parent);
  slash = "/";
  }

if (!string_format(buffer, sizeof(buffer), "%s%s%s", parent, slash, name))
  log_write(0, LOG_PANIC_DIE, "name too long in directory_make");

while (c != 0 && *p != 0)
  {
  while (*p != 0 && *p != '/') p++;
  c = *p;
  *p = 0;
  if (stat(buffer, &statbuf) != 0)
    {
    if (mkdir(buffer, mode) < 0 && errno != EEXIST)
      {
      if (!panic) return FALSE;
      log_write(0, LOG_PANIC_DIE,
        "Failed to create directory \"%s\": %s\n", buffer, strerror(errno));
      }
    if (use_chown) chown(buffer, exim_uid, exim_gid);
    }
  *p++ = c;
  }

return TRUE;
}

/* End of directory.c */