posix_access Determine accessibility of a file &reftitle.description; boolposix_access stringfile intmodePOSIX_F_OK posix_access checks the user's permission of a file. &reftitle.parameters; file The name of the file to be tested. mode A mask consisting of one or more of POSIX_F_OK, POSIX_R_OK, POSIX_W_OK and POSIX_X_OK. POSIX_R_OK, POSIX_W_OK and POSIX_X_OK request checking whether the file exists and has read, write and execute permissions, respectively. POSIX_F_OK just requests checking for the existence of the file. &reftitle.returnvalues; &return.success; &reftitle.examples; This example will check if the $file is readable and writable, otherwise will print an error message. ]]> &reftitle.notes; ¬e.sm.uidcheck; &reftitle.seealso; posix_get_last_error posix_strerror