tag 610824 + fixed-upstream severity 610824 normal thanks On Sat, Jan 22, 2011 at 10:26:51PM +0200, Nach wrote: > Package: libc6-dev > Version: 2.11.2-9 > Severity: important > Tags: upstream > > > Several standardized defines and functions which are part of > POSIX.1-2008/SUSv4 require nonstandard GNU defines in order to function > properly. > I don't know the full range of standardized functions and defines which are > affected, but I have found several. > > http://pubs.opengroup.org/onlinepubs/9699919799/functions/open.html > Specifies that O_DIRECTORY, O_NOFOLLOW, and O_CLOEXEC are part of the > standard for open()/openat(). > > The manpages incorrectly states regarding some, that they are Linux-specific, > when they aren't. > O_DIRECTORY > If pathname is not a directory, cause the open to fail. This > flag is Linux-specific, and was added in kernel version 2.1.126, to avoid > denial-of-service problems if opendir(3) is called on a > FIFO or tape device, but should not be used outside of the implementation of > opendir(3). > > <fcntl.h> ends up wrapping them as follows: > #ifdef __USE_GNU > # define O_DIRECT 040000 /* Direct disk access. */ > # define O_DIRECTORY 0200000 /* Must be a directory. */ > # define O_NOFOLLOW 0400000 /* Do not follow links. */ > # define O_NOATIME 01000000 /* Do not set atime. */ > # define O_CLOEXEC 02000000 /* Set close_on_exec. */ > #endif > > 3 out of those 5 should not be wrapped like that. > > I found similar issues with pread() and pwrite(). > The standard > http://pubs.opengroup.org/onlinepubs/9699919799/functions/pread.html states > they should be included with <unistd.h>, but they aren't. > The manpages state that _POSIX_C_SOURCE >= 200809L would include them, but it > doesn't seem to help. > > <unistd.h> contains the following: > #ifdef __USE_UNIX98 > # ifndef __USE_FILE_OFFSET64 > /* Read NBYTES into BUF from FD at the given position OFFSET without > changing the file pointer. Return the number read, -1 for errors > or 0 for EOF. > > This function is a cancellation point and therefore not marked with > __THROW. */ > extern ssize_t pread (int __fd, void *__buf, size_t __nbytes, > __off_t __offset) __wur; > > /* Write N bytes of BUF to FD at the given position OFFSET without > changing the file pointer. Return the number written, or -1. > > This function is a cancellation point and therefore not marked with > __THROW. */ > extern ssize_t pwrite (int __fd, __const void *__buf, size_t __n, > __off_t __offset) __wur; > > > > Adding -D__USE_UNIX98 when compiling fixes the problem, but that shouldn't be > needed. > > This problem seems to be quite widespread. Adding -D_POSIX_C_SOURCE=200809L > for example seems to no longer include many functions which should > be included as part of POSIX.1-2008, such as the *at() functions. >
Both issues are fixed in the new upstream version. This new upstream version will be uploaded shortly after the Squeeze release. -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
