rtld would accept the first shared library it found with the right
major version number, even if the minor version number was too low.
If a different version of the shared library with an adequate minor
version number appeared later in the search path, it would not be
found.
Now the rtld searches all locations first looking for a library
with a minor version that is high enough. Only if such a library
is not found will it fall back to accepting a minor version number
that is too low. As before, a warning comes out in that case.
This solves some problems encountered when building an older world
on a -current system.
This commit introduces the following features:
a) the fetchStat*() functions, which return meta-information for a
document, such as size, modification time, etc.
b) the use of the com_err(3) facilities to report errors.
It also fixes a bunch of style bugs and a few logic bugs and somewhat
improves the man page.
Changed files, in alphabetical order:
Makefile:
Don't generate macros in {ftp,http}err.c.
Generate category fields for the error message lists.
Compile the error table.
Install fetch_err.h along with fetch.h.
common.c:
Remove the _netdb_errstring() macro, and add FETCH_ERR_NETDB to the
error code in the _netdb_seterr() macro.
Add categories to the _netdb_errlist table.
Report errors through the Common Error library.
common.h:
Add the DEBUG macros.
Add prototype for fetchConnect().
Remove the prototype for _fetch_errstring(), which is local to common.c
Add a categroy field to struct fetcherr, and define constants for
error categories.
Define macros for _{url,netdb,ftp,http}_seterr().
errors.et: (new file)
List error categories.
fetch.3:
Document the fetchStat*() functions.
Move the "unimplemented functionality" comments from NOTES to BUGS.
Document that applications which use libfetch must also use
libcom_err, and list existing error codes.
Undocument fetchLastErr{Code,String}.
Remove the (empty) DIAGNOSTICS section.
Mention Eugene Skepner in the AUTHORS section.
fetch.c:
Move the DEBUG macros to common.c
Add fetchStat() and fetchStatURL().
Generate error messages for URL parser errors, and fix a minor bug
in the parser.
Use 'struct url' instead of 'url_t'.
Remove fetchLastErr{Code,String}.
fetch.h:
Use 'struct url' instead of 'url_t', and remove the typedef.
Define struct url_stat (used by fetchStat()).
Add prototypes for fetchStat*().
Remove the declarations for fetchLastErr{Code,String}.
Include fetch_err.h.
fetch_err.et: (new file)
Error table for libfetch.
file.c:
Add fetchStatFile().
Use 'struct url' instead of 'url_t'.
ftp.c:
Add fetchStatFTP().
Use 'struct url' instead of 'url_t'.
Don't use fetchLastErrCode.
ftp.errors:
Add categories to all error messages.
http.c:
Add fetchStatHTTP().
Use 'struct url' instead of 'url_t'.
Don't use fetchLastErr{Code,Text}.
http.errors:
Add categories to all error messages.
Prompted by: jkh and Eugene Skepner
Numerous sugestions from: Garett Wollman and Eugene Skepner
we can recurse when loading dependencies and that the kstack is limited
to something like 6 or 7KB. Having a single dependency caused an instant
double panic, and I stronly suspect some of the other strange "events"
that I have seen are possibly as a result of taking a couple of interrupts
with a large chunk of the stack already in use.
While here, fix a minor logic hiccup in a sanity check.
I don't have access to a BSD/OS machine to check the veracity of the
magic number. However, no harm will be done by the commit and since
someone was motivated enough to file a PR, I'm committing the change.
PR: 7629
Submitted by: Jos Backus <jbackus@plex.nl>
alphabetical order:
Makefile:
Add common.c to SRCS.
Make debugging easier by making 'CFLAGS += -DNDEBUG' conditional on DEBUG
Don't declare struct {ftp,http}err in {ftp,http}err.c; use struct fetcherr
instead.
README:
Remove the todo list, which is out of date anyway.
common.c: (new file)
Gather utility functions in this file.
Merge the error reporting functions intp _fetch_errstring(),
_fetch_seterr() and _fetch_syserr().
Set fetchLastErrCode and fetchLastErrText appropriately when fetchConnect
fails.
common.h: (new file)
Gather internal prototypes and structures in this files.
fetch.3:
Undocument fetchFreeURL().
Document a few more known bugs.
Document fetchLastErrCode and fetchLastErrText.
fetch.c:
Add descriptive comments to all functions that lacked them.
Move fetchConnect() to common.c.
Obviate the need for fetchFreeURL(), and remove it.
fetch.h:
Modify struct url_t so the document part is at the end.
ftp.c:
Remove code that is duplicated elsewhere.
http.c:
Remove code that is duplicated elsewhere.
Prompted by: jkh
