FAT | RFS | XFS | ZFS

is_open()

PROTOTYPE

#include <posix.h>

int is_open(const char *path);

DESCRIPTION

is_open() checks if the file specified by path is currently open. Paths starting with ‘/’ are absolute. Otherwise they are relative to the CWD.

The caller needs execute access to every directory in the path prefix.

is_open() returns TRUE if the file is open, FALSE if the file is closed, else -1 for error.

ERROR CODES

EACCES	No execute access to a directory in the path prefix.
EFAULT	path equals NULL.
ENAMETOOLONG	A name in path exceeds the effective maximum file name length.
ENOENT	path is the empty string or includes a file that was not found.
ENOTDIR	One of the non-leaf path components is not a directory.

EXAMPLE

  /*-------------------------------------------------------------------*/
  /* Loop through every file in the directory.                         */
  /*-------------------------------------------------------------------*/
  while (entry = readdir(cur_dir))
  {
    /*-----------------------------------------------------------------*/
    /* Skip if error or file is currently open.                        */
    /*-----------------------------------------------------------------*/
    if (is_open(entry->d_name) != 0)
      continue;