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1998-10-18 Ulrich Drepper <drepper@cygnus.com> * resolv/nss_dns/dns-host.c: Add missing errnop parameter to the NSS functions. * resolv/nss_dns/dns-network.c: Likewise. * grp/Makefile: Don't search for linuxhtreads in add-ons, use have-thread-library to determine whether threads are available. * pwd/Makefile: Remove wrong comment. * inet/Makefile: Define CFLAGS-gethstbyad_r.c, CFLAGS-gethstbynm_r.c, and CFLAGS-gethstbynm2_r.c to -DUSE_NSCD=1. * locale/C-messages.c: Define default strings for YESTR and NOSTR. * nss/Versions: Add __nss_hosts_lookup. * nss/getXXbyYY.c: Remove unneeded assignment. * nss/getXXbyYY_r.c: Include nscd/nscd_proto.h only if needed. Almost complete rewrite of the NSCD to make it smaller, faster, add more functionnality and make it easier to extend. * nscd/Makfile (routines): Add nscd_gethst_r. (nscd-modules): Add hstcache, gethstbyad_r, gethstbynm2_r, and cache. * nscd/cache.c: New file. * nscd/gethstbyad_r.c: New file. * nscd/gethstbynm2_r.c: New file. * nscd/hstcache.c: New file. * nscd/nscd_gethst_r.c: New file. * nscd/connections.c: Rewritten. Don't start new thread for every new connection. Use a fixed set of threads which handle all connections and also the cache cleanup. * nscd/grpcache.c: Rewritten to use generic cache handling functions in cache.c. * nscd/nscd.c: Recognize new parameter nthreads. Adjust initialization for rewrite. Remove handle_requests function. * nscd/nscd.h (NSCD_VERSION): Bump to 2. Define new data structure for the new unified cache and the host database entries. * nscd/nscd_conf.c: Rewrite parsing partly to allow adding of more databases easily. Recognize check-files and threads definitions. * nscd/nscd.conf: Add definition of enable-cache and check-files to passwd and group definitions. Add new set of definitions for hosts. * nscd/nscd_getgr_r.c: Rewrite for new protocol. * nscd/nscd_getpw_r.c: Likewise. * nscd/nscd_proto.h: Add prototype for host database functions. * nscd/nscd_stat.c: Rewrite to simplify printing of information for many databases. * nscd/dbg_log.c: Remove unnecessary variable initializations. Global variable debug_flag is renamed to dbg_level. * nscd/dbg_log.h: Declare set_logfile.
162 lines
6.3 KiB
Plaintext
162 lines
6.3 KiB
Plaintext
Open jobs for finishing GNU libc:
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---------------------------------
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Status: July 1998
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If you have time and talent to take over any of the jobs below please
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contact <bug-glibc@gnu.org>.
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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[ 1] Port to new platforms or test current version on formerly supported
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platforms.
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**** See http://www.gnu.org/software/libc/porting.html for more details.
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[ 2] Test compliance with standards. If you have access to recent
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standards (IEEE, ISO, ANSI, X/Open, ...) and/or test suites you
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could do some checks as the goal is to be compliant with all
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standards if they do not contradict each other.
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[ 3] The IMHO opinion most important task is to write a more complete
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test suite. We cannot get too many people working on this. It is
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not difficult to write a test, find a definition of the function
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which I normally can provide, if necessary, and start writing tests
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to test for compliance. Beside this, take a look at the sources
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and write tests which in total test as many paths of execution as
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possible.
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[ 4] Write translations for the GNU libc message for the so far
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unsupported languages. GNU libc is fully internationalized and
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users can immediately benefit from this.
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Take a look at the matrix in
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ftp://ftp.gnu.org/pub/gnu/ABOUT-NLS
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for the current status (of course better use a mirror of ftp.gnu.org).
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[ 6] Write `long double' versions of the math functions. This should be
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done in collaboration with the NetBSD and FreeBSD people.
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The libm is in fact fdlibm (not the same as in Linux libc).
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**** Partly done. But we need someone with numerical experiences for
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the rest.
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[ 7] Several math functions have to be written:
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- exp2
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with long double arguments.
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Beside this most of the complex math functions which are new in
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ISO C 9X should be improved. Writing some of them in assembler is
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useful to exploit the parallelism which often is available.
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[ 8] If you enjoy assembler programming (as I do --drepper :-) you might
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be interested in writing optimized versions for some functions.
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Especially the string handling functions can be optimized a lot.
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Take a look at
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Faster String Functions
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Henry Spencer, University of Toronto
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Usenix Winter '92, pp. 419--428
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or just ask. Currently mostly i?86 and Alpha optimized versions
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exist. Please ask before working on this to avoid duplicate
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work.
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[10] Extend regex and/or rx to work with wide characters and complete
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implementation of character class and collation class handling.
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It is planned to do a complete rewrite.
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[11] Write access function for netmasks, bootparams, and automount
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databases for nss_files and nss_db module.
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The functions should be embedded in the nss scheme. This is not
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hard and not all services must be supported at once.
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[14] We need to write a library for on-the-fly transformation of streams
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of text. In fact, this would be a recode-library (you know, GNU recode).
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This is needed in several places in the GNU libc and I already have
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rather concrete plans but so far no possibility to start this.
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*** The library is available, now it remains to be used in the streams.
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[15] Cleaning up the header files. Ideally, each header style should
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follow the "good examples". Each variable and function should have
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a short description of the function and its parameters. The prototypes
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should always contain variable names which can help to identify their
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meaning; better than
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int foo __P ((int, int, int, int));
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Blargh!
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[16] The libio stream file functions should be extended in a way to use
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mmap to map the file and use it as the buffer to user sees. For
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read-only streams this should be rather easy and it avoids all read()
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calls.
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A more sophisticated solution would use mmap also for writing. The
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standards do not demand that the file on the disk is always in the
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correct form so it would be possible to enlarge it always according
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to the page size and install the correct length only for fclose() and
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fflush() calls.
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[18] Based on the sprof program we need tools to analyze the output. The
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result should be a link map which specifies in which order the .o
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files are placed in the shared object. This should help to improve
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code locality and result in a smaller foorprint (in code and data
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memory) since less pages are only used in small parts.
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[19] A user-level STREAMS implementation should be available if the
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kernel does not provide the support.
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[20] More conversion modules for iconv(3). Existing modules should be
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extended to do things like transliteration if this is wanted.
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For often used conversion a direct conversion function should be
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available.
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[21] The nscd program and the stubs in the libc should be changed so
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that each program uses only one socket connect. Take a look at
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http://www.cygnus.com/~drepper/nscd.html
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[22] It should be possible to have the information gconv-modules in
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a simple database which is faster to access. Using libdb is probably
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overkill and loading it would probably be slower than reading the
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plain text file. But a file format with a simple hash table and
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some data it points to should be fine. Probably it should be
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two tables, one for the aliases, one for the mappings. The code
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should start similar to this:
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if (stat ("gconv-modules", &stp) == 0
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&& stat ("gconv-modules.db", %std) == 0
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&& stp.st_mtime < std.st_mtime)
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{
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... use the database ...
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{
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else
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{
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... use the plain file if it exists, otherwise the db ...
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}
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[23] The `strptime' function needs to be completed. This includes among
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other things that it must get teached about timezones. The solution
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envisioned is to extract the timezones from the ADO timezone
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specifications. Special care must be given names which are used
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multiple times. Here the precedence should (probably) be according
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to the geograhical distance. E.g., the timezone EST should be
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treated as the `Eastern Australia Time' instead of the US `Eastern
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Standard Time' if the current TZ variable is set to, say,
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Australia/Canberra or if the current locale is en_AU.
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