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authorUlrich Drepper <drepper@redhat.com>1998-12-05 09:12:01 +0000
committerUlrich Drepper <drepper@redhat.com>1998-12-05 09:12:01 +0000
commit31604a65d1939a64e89b4329157cf6bbaf51bc61 (patch)
tree71eb5431ed5bb849eea49a095fbbae0fa1680a52 /PROJECTS
parenta6ff34d7b0b59a1ad501dca25558ba21f6e539bb (diff)
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Update.
1998-12-05 Ulrich Drepper <drepper@cygnus.com> * sysdeps/gnu/bits/utmp.h: Rename struct exit_status to __exit_status. (struct __exit_status): Define members without leading __ only for __USE_GNU. * sysdeps/gnu/bits/utmpx.h (struct __exit_status): Define members without leading __ only for __USE_GNU.
Diffstat (limited to 'PROJECTS')
-rw-r--r--PROJECTS38
1 files changed, 34 insertions, 4 deletions
diff --git a/PROJECTS b/PROJECTS
index ed79e57..0f2a8f3 100644
--- a/PROJECTS
+++ b/PROJECTS
@@ -1,6 +1,6 @@
Open jobs for finishing GNU libc:
---------------------------------
-Status: November 1998
+Status: December 1998
If you have time and talent to take over any of the jobs below please
contact <bug-glibc@gnu.org>.
@@ -102,6 +102,7 @@ contact <bug-glibc@gnu.org>.
Blargh!
+
[16] The libio stream file functions should be extended in a way to use
mmap to map the file and use it as the buffer to user sees. For
read-only streams this should be rather easy and it avoids all read()
@@ -113,24 +114,44 @@ contact <bug-glibc@gnu.org>.
to the page size and install the correct length only for fclose() and
fflush() calls.
+
[18] Based on the sprof program we need tools to analyze the output. The
result should be a link map which specifies in which order the .o
files are placed in the shared object. This should help to improve
code locality and result in a smaller foorprint (in code and data
memory) since less pages are only used in small parts.
+
[19] A user-level STREAMS implementation should be available if the
kernel does not provide the support.
+
[20] More conversion modules for iconv(3). Existing modules should be
extended to do things like transliteration if this is wanted.
For often used conversion a direct conversion function should be
available.
+
[21] The nscd program and the stubs in the libc should be changed so
that each program uses only one socket connect. Take a look at
http://www.cygnus.com/~drepper/nscd.html
+ An alternative approach is to use an mmap()ed file. The idea is
+ the following:
+ - the nscd creates the hash tables and the information it stores
+ in it in a mmap()ed region. This means no pointers must be
+ used, only offsets.
+ - each program using NSS functionality tries to open the file
+ with the data.
+ - by checking some timestamp (which the nscd renew frequently)
+ the programs can test whether the file is still valid
+ - if the file is valid look through the nscd and locate the
+ appropriate hash table for the database and lookup the data.
+ If it is included we are set.
+ - if the data is not yet in the database we contact the nscd using
+ the currently implemented methods.
+
+
[22] It should be possible to have the information gconv-modules in
a simple database which is faster to access. Using libdb is probably
overkill and loading it would probably be slower than reading the
@@ -140,7 +161,7 @@ contact <bug-glibc@gnu.org>.
should start similar to this:
if (stat ("gconv-modules", &stp) == 0
- && stat ("gconv-modules.db", %std) == 0
+ && stat ("gconv-modules.db", &std) == 0
&& stp.st_mtime < std.st_mtime)
{
... use the database ...
@@ -150,6 +171,7 @@ contact <bug-glibc@gnu.org>.
... use the plain file if it exists, otherwise the db ...
}
+
[23] The `strptime' function needs to be completed. This includes among
other things that it must get teached about timezones. The solution
envisioned is to extract the timezones from the ADO timezone
@@ -160,5 +182,13 @@ contact <bug-glibc@gnu.org>.
Standard Time' if the current TZ variable is set to, say,
Australia/Canberra or if the current locale is en_AU.
-[24] Allow add-ons to specify dependencies and generate the content of
- `all-subdirs' in Makeconfig dynamically.
+
+[25] Sun's nscd version implements a feature where the nscd keeps N entries
+ for each database current. I.e., if an entries lifespan is over and
+ it is one of the N entries to be kept the nscd updates the information
+ instead of removing the entry.
+
+ How to decide about which N entries to keep has to be examined.
+ Factors should be number of uses (of course), influenced by aging.
+ Just imagine a computer used by several people. The IDs of the current
+ user should be preferred even if the last user spent more time.