EINVAL The mode provided to fopen(), fdopen(), or freopen() was invalid. The fopen(), fdopen() and freopen() functions may also fail and set errno for any of the errors specified for the routine malloc(3). The fopen() function may also fail and set errno for any of the errors specified for the routine open(2).
May 18, 2009 · Hi all, I am running Windows XP home with a user who has full administrative permission. Yet, I am getting a permission problem writing files with fopen_s Here is the code: FILE *writeFd; err = fopen_s (&writeFd, "test.txt", "w");
The running environment supports at least FOPEN_MAX files open simultaneously. Parameters filename C string containing the name of the file to be opened. Its value shall follow the file name specifications of the running environment and can include a path (if supported by the system). mode C string containing a file access mode. It can be: fopen accepts paths that are valid on the file system at the point of execution; fopen accepts UNC paths and paths that involve mapped network drives as long as the system that executes the code has access to the share or mapped drive at the time of execution. Jun 11, 2018 · When using fopen_s or freopen_s, file access permissions for any file created with "w" or "a" prevents other users from accessing it. File access mode flag "u" can optionally be prepended to any specifier that begins with "w" or "a", to enable the default fopen permissions. (C11)
Invalid file identifier. Use fopen to generate a Learn more about file identifier