Package: libc6 Version: 2.10.2-6 Severity: normal Two C source files are attached. One of them uses Linux fallocate() and one uses posix_fallocate() from POSIX:2001. Both are ostensibly supported by eglibc. I'm running a stock kernel from unstable (some background text removed):
$ uname -r 2.6.29-1-amd64 $ dpkg -l linux-image-2.6.29-1-amd64 ii linux-image-2.6.29-1-amd64 2.6.29-3 Linux 2.6.29 image on AMD64 Each of the C programs will attempt to open and truncate a file named "file", then allocate one MiB of space for it, changing its size. Here's what happens instead: $ strace ./linux [...] open("file", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3 fallocate(3, 0, 4503599627370496, 6895618648722965280) = -1 EOPNOTSUPP (Operation not supported) << The hexadecimal representations of those two numbers are 0x0010000000000000 and 0x5fb228a05fb10320. >> And: $ strace ./posix open("file", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3 fallocate(3, 0, 4503599627370496, 1048576) = -1 EOPNOTSUPP (Operation not supported) << This is followed by an emulation of posix_fallocate using one-byte pwrites. Jesus. >> This is obviously bogus. This feels like libc screwing up the system call parameters, which is why I'm reporting it here, but I'm not certain of that. It could also potentially be strace or the kernel, in which case please reassign as necessary, as usual. ---> Drake Wilson -- System Information: Debian Release: squeeze/sid APT prefers unstable APT policy: (990, 'unstable'), (500, 'testing'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 2.6.29-1-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages libc6 depends on: ii libc-bin 2.10.2-6 Embedded GNU C Library: Binaries ii libgcc1 1:4.4.3-2 GCC support library libc6 recommends no packages. Versions of packages libc6 suggests: ii debconf [debconf-2.0] 1.5.28 Debian configuration management sy ii glibc-doc 2.10.2-5 Embedded GNU C Library: Documentat ii locales 2.10.2-5 Embedded GNU C Library: National L -- debconf information: glibc/upgrade: true * glibc/disable-screensaver: glibc/restart-failed: * glibc/restart-services: ssh saslauthd rsync openbsd-inetd lprng exim4 cron atd -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org