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f381610dd5
to allow standalone compilation. (wipefile): Added support for emulating /dev/fd/# files even if the OS doesn't support them. From Paul Eggert. (main, usage): Changed --device short option to -D. (wipefd, do_wipefd): Renamed function to do_wipefd and added separate wipefd that performs sanity checks on externally-opened file descriptors, such as not append-only. From Paul Eggert. (do_wipefd, isaac_seedfd): Do not read file for any reason. if the file is low-entropy, it's a security hole. (wipefile) Changed to open O_WRONLY and chmod to write-only when forcing. (isaac_seedfd) Function deleted as unnecessary. From Paul Eggert. (dopass): Dynamically fall back to fsync() if fdatasync() fails, since POSIX, in their infinitesimal wisdom, encourage implementations that return constant -1, making compile-time testing useless. From Paul Eggert. (dopass): Changed to support a size of -1 to mean "unknown". This entailed changing to a counting-up offset rather than couting-down cursize for the central state variable. Also changed size argument to be call-by-reference so that it can be passed back once known. (sizer) Function deleted as unnecessary. (wipefd): Changed to match. From Paul Eggert (dopass): Try to skip over bad blocks in destination files. Also added ftruncate() for more complete destruction of metadata. (main, usage): Changed "-" to stand for standard output. (wipefd): Added error message to detect conflict with -v. (dopass): Added periodic fsync() calls to keep the pass progress display in sync with reality. Hopefully they're sufficiently far spaced that throughput isn't affected. It might be a good thing to do even in non-verbose mode, to avoid filling up the kernel caches with dirty data. Also added ftruncate() for more complete destruction of metadata. (quotearg_colon): New function to print pathological filenames properly. [!HAVE_CONFIG_H] (quotearg_colon_buf) New internal helper function that does most of the work. (wipefd, do_wipefd, dopass) Now take a qname (pre-quoted name) argument. (wipename, wipefile, main) Changed diagnostics to use quotearg_colon. Error messages are also in a more uniform format. From Paul Eggert. (struct Options, main, do_wipefd): Added -s/--size=N flag. (xstrtoul): Added support for valid_suffixes to help this. (usage) Documented it. (error): Changed some arguments from N_() to _(), since error() does not translate its argument. I think this is a bug. (struct Options do_wipefd, wipefd, wipefile, main): moved passes argument into the Options structure as n_iterations, which is now a size_t. From Paul Eggert. (isaac_seed_start, isaac_seed_data, isaac_seed_finish): New functions to manage seeding of RNG with arbitrary-sized data. (isaac_init): commented out as dead code. (isaac_seed): changed to use new functions to prevent any possibility of a buffer overflow. (isaac_seed): Added support for Solaris' gethrtime() configure.in: Corresponding feature test. From Paul Eggert. (wipename): Change remove() to unlink() for speed & portability. Use lstat() instead of access() to see if a filename is taken. This works even on dangling symlinks and avoids the suid problems of access(2). From Paul Eggert. (isaac_seed_machdep): New function for reading cycle counters |
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