.TH open_rw 3 .SH NAME open_rw \- open a file for reading and writing .SH SYNTAX .B #include int \fBopen_rw\fP(const char *\fIfilename\fR); .SH DESCRIPTION open_rw opens the file \fIfilename\fR for reading and writing use and returns the file handle. If the file does not exist, it will be created with mode 0644. If there was an error opening or creating the file, open_rw returns -1 and sets errno accordingly. .SH "SEE ALSO" open(2)