Source: libc6 Version: 2.17-97 Severity: normal Dear Maintainer,
The libc6 manpage on fopencookie() says, with regards to the writer function in the cookie_io_functions_t, that "As its function result, the write function should return the number of bytes copied from buf, or 0 on error." Similarly, the Texinfo manual says that "Your function should transfer up to SIZE bytes from the buffer, and return the number of bytes written." This seems to imply that the writer function is supposed to work similar to write(2) and may choose to consume less data than is passed to it, and return how much data it did in fact consume. However, when I actually do this, libc seems to consider that an error and the stream stops working. As soon as I change my writer function so that it does consume all the data in the buffer, my program starts working as expected. I can't say I know if it's the code or the documentation which is wrong, but at least one of them seems to be in error. -- Fredrik Tolf -- System Information: Debian Release: jessie/sid APT prefers testing APT policy: (500, 'testing'), (99, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.12-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
