1 Open jobs for finishing GNU libc:
2 ---------------------------------
5 If you have time and talent to take over any of the jobs below please
6 contact <bug-glibc@gnu.org>.
8 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 [ 1] Port to new platforms or test current version on formerly supported
13 **** See http://www.gnu.org/software/libc/porting.html for more details.
16 [ 2] Test compliance with standards. If you have access to recent
17 standards (IEEE, ISO, ANSI, X/Open, ...) and/or test suites you
18 could do some checks as the goal is to be compliant with all
19 standards if they do not contradict each other.
22 [ 3] The IMHO opinion most important task is to write a more complete
23 test suite. We cannot get too many people working on this. It is
24 not difficult to write a test, find a definition of the function
25 which I normally can provide, if necessary, and start writing tests
26 to test for compliance. Beside this, take a look at the sources
27 and write tests which in total test as many paths of execution as
31 [ 4] Write translations for the GNU libc message for the so far
32 unsupported languages. GNU libc is fully internationalized and
33 users can immediately benefit from this.
35 Take a look at the matrix in
36 ftp://ftp.gnu.org/pub/gnu/ABOUT-NLS
37 for the current status (of course better use a mirror of ftp.gnu.org).
40 [ 8] If you enjoy assembler programming (as I do --drepper :-) you might
41 be interested in writing optimized versions for some functions.
42 Especially the string handling functions can be optimized a lot.
46 Faster String Functions
47 Henry Spencer, University of Toronto
48 Usenix Winter '92, pp. 419--428
50 or just ask. Currently mostly i?86 and Alpha optimized versions
51 exist. Please ask before working on this to avoid duplicate
55 [11] Write access function for netmasks, bootparams, and automount
56 databases for nss_files and nss_db module.
57 The functions should be embedded in the nss scheme. This is not
58 hard and not all services must be supported at once.
61 [15] Cleaning up the header files. Ideally, each header style should
62 follow the "good examples". Each variable and function should have
63 a short description of the function and its parameters. The prototypes
64 should always contain variable names which can help to identify their
67 int foo (int, int, int, int);
71 *** The conformtest.pl tool helps cleaning the namespace. As far as
72 known the prototypes all contain parameter names. But maybe some
73 comments can be improved.
76 [18] Based on the sprof program we need tools to analyze the output. The
77 result should be a link map which specifies in which order the .o
78 files are placed in the shared object. This should help to improve
79 code locality and result in a smaller foorprint (in code and data
80 memory) since less pages are only used in small parts.
83 [19] A user-level STREAMS implementation should be available if the
84 kernel does not provide the support.
86 *** This is a much lower priority job now that STREAMS are optional in
90 [20] More conversion modules for iconv(3). Existing modules should be
91 extended to do things like transliteration if this is wanted.
92 For often used conversion a direct conversion function should be
96 [21] The nscd program and the stubs in the libc should be changed so
97 that each program uses only one socket connect. Take a look at
98 http://people.redhat.com/drepper/nscd.html
100 An alternative approach is to use an mmap()ed file. The idea is
102 - the nscd creates the hash tables and the information it stores
103 in it in a mmap()ed region. This means no pointers must be
106 if POSIX shared memory is available use a named shared memory
107 region to put the data in
108 - each program using NSS functionality tries to open the file
110 - by checking some timestamp (which the nscd renews frequently)
111 the programs can test whether the file is still valid
112 - if the file is valid look through the nscd and locate the
113 appropriate hash table for the database and lookup the data.
114 If it is included we are set.
115 - if the data is not yet in the database we contact the nscd using
116 the currently implemented methods.
119 [23] The `strptime' function needs to be completed. This includes among
120 other things that it must get teached about timezones. The solution
121 envisioned is to extract the timezones from the ADO timezone
122 specifications. Special care must be given names which are used
123 multiple times. Here the precedence should (probably) be according
124 to the geograhical distance. E.g., the timezone EST should be
125 treated as the `Eastern Australia Time' instead of the US `Eastern
126 Standard Time' if the current TZ variable is set to, say,
127 Australia/Canberra or if the current locale is en_AU.
130 [25] Sun's nscd version implements a feature where the nscd keeps N entries
131 for each database current. I.e., if an entries lifespan is over and
132 it is one of the N entries to be kept the nscd updates the information
133 instead of removing the entry.
135 How to decide about which N entries to keep has to be examined.
136 Factors should be number of uses (of course), influenced by aging.
137 Just imagine a computer used by several people. The IDs of the current
138 user should be preferred even if the last user spent more time.
141 [27] We need a second test suite with tests which cannot run during a normal
142 `make check' run. This test suite can require root priviledges and
143 can test things like DNS (i.e., require network access),
144 user-interaction, networking in general, and probably many other things.