Mail Archives: djgpp/1992/09/21/19:42:24
Here are a few more patches to libc.a. I hope people find them
useful. I include here a discription of the patches, and then a zoo
archive containing the actual patches.
1. Apparently the patch to dos/dir.c that I posted before was
corrupted. I don't know what happenned, but I've included a new
copy of it. This patch fixes the problem of trailing slashes on
the directory name passed to opendir(). This is a problem in
particular for the root directory "/", since it always has a
trailing slash. It also fixes closedir() to return zero. It also
changes readdir() so that it finds hidden and system files as well
as normal files.
To use this patch, apply it to /djgpp/libsrc/c/dos/dir.c, and
recompile libc.a.
2. While compiling various FSF utilities, I ran into three more errno
values that were not defined - ENOSPC, EAGAIN, and ENXIO. To use
this patch, apply it to /djgpp/include/errno.h. This patch assumes
that you have applied my previous patch to errno.h.
3. I previously supplied source for getgrent() and related functions,
and getpwent() and related functions. I am now providing a patch
for them which makes them work a little better. To use this patch,
apply it to the getgrent.c and getpwent.c that I previously
distributed, and recompile libc.a.
4. The link() function in libc.a doesn't do a link, since links are
not possible on DOS. However, what it does do is a rename, which
seems wrong to me. Included is a version of link() which does a
copy instead of rename. This version attempts to make the modes
and time of the destination file match those of the source file.
To use this patch, remove the existing /djgpp/libsrc/c/sys/link.s,
replace it with the supplied link.c, and then recompile libc.a.
5. The stdio.h file distributed with DJGPP 1.08 defines STDC_HEADERS.
This okay, but many makefiles try to define STDC_HEADERS on the
command line, leading to spurious warnings that STDC_HEADERS was
redefined. I fixed this by putting "#ifndef STDC_HEADERS" around
the definition in stdio.h. To use this patch, apply it to
/djgpp/include/stdio.h.
6. The unistd.h file distributed with DJGPP 1.08 defines FNM_QUOTE and
FNM_PATHNAME, which are used by the fnmatch() function. However,
many FSF programs supply their own copy of fnmatch() and their own
definitions of FNM_QUOTE and FNM_PATHNAME. To avoid spurious
warnings, I put "#ifndef"s around these definitions in unistd.h.
To usethis patch, apply it to /djgpp/include/unistd.h.
On a related subject, the version of fnmatch() included in DJGPP
1.08 seems to have the return value backwards. As I understand it,
fnmatch() should return zero for a match an non-zero for a
non-match (kind of like strcmp()). The fnmatch() supplied in DJGPP
1.08 seems to have this backwards. I guess I can't be sure what
the correct definition is, but FSF code and HP-UX 8.0 both agree
with me and disagree with the fnmatch() supplied with DJGPP 1.08.
7. In a previous patch to libc.a, I supplied a simple one-line version
of /djgpp/include/sys/wait.h. In order to get a the FSF find and
xargs programs to compile, I had to define a few constants in
wait.h as well. To get the new version wait.h, copy the supplied
wait.h into /djgpp/include/sys/wait.h.
--
Eric Backus
ericb%hplsla AT hplabs DOT hp DOT com
(206) 335-2495
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