src/gnu/usr.bin/ld/rtld, branch upstream/2.2.0

Merge bug fix from main branch 1.43 -> 1.44: If a library is found

1997-01-20T19:37:13Z

in the hints file, but the library doesn't exist, ignore the hint.

If errors occur during the loading of the shared libraries required by

1996-10-24T16:24:19Z

the main program, report them directly from the dynamic linker and die there, rather than returning an error message to crt0.o. This enables the printing of error messages even for old executables, whose version of crt0.o is not able to print them. This fix closes PR bin/1869. The code in crt0.o for printing error messages from the dynamic linker is no longer used, because of this change. But it must remain, for backward compatibility with older dynamic linkers.

Fix two minor typos in the manual page.

1996-10-18T04:49:43Z

Add the search directories from the hints file only the first time it is

1996-10-10T23:16:50Z

opened. After that, the directories are already present, and there is no point in adding them again. This doesn't fix any bugs; it's just for efficiency.

Fix a bug that caused a segmentation violation if dlsym() was called

1996-10-10T04:10:32Z

with its first argument equal to NULL.

There's no need to 'unsetenv()' unsafe environment variables explicitly

1996-10-01T16:09:18Z

since rt_readenv() already takes care of not setting unsafe variables. This was part of the changes I submitted to Peter and John during the review which must have gotten missed.

Sigh, oh well, here's my obligigatory "oops" commit. I don't quite know

1996-10-01T11:54:38Z

how I managed to get this out of sync, but I did. I guess that's what I get for directly committing from different machines that I was testing on. Pointed out by: Paul Traina

Update to handle new version ld.so.hints and info in executable for

1996-10-01T01:52:03Z

configurable fallback search paths, as well as new crt interface version. Also: - even faster getenv(), get all environment variable settings in a single pass. - ldd printf-like format specifications - minor code cleanups, one vsprintf -> vsnprintf (harmless) The library search sequence is a little more complete now. Before, it'd search $LD_LIBRARY_PATH (by opendir/readdir/closedir), then read the hints file, then read /usr/lib (again by scanning thr directory). It would then fail if there was no "found" library. Now, it does LD_LIBRARY_PATH and the hints file the same, but then uses a longer fallback path. The -R path is fetched from the executable if specified at build time, the ldconfig path is appended, and /usr/lib is appended to that. Duplicates are suppressed. This means that simply placing a new library in /usr/local/lib will work (the same as it did in /usr/lib) without needing ldconfig -m. It will find it quicker if the ldconfig is run though. Similar changes have been made to the NetBSD ld.so, but ours is rather different now due to John Polstra's speedups and fixes from a while back. The ldd printf-like format support came direct from NetBSD. Reviewed by: nate, jdp

add missing comma(s) in .Xr macros

1996-09-23T22:24:39Z

Use `install -C' instead of lots of shell commands to install ld.so

1996-09-12T03:42:54Z

as atomically as possible. (Immutable targets can't be renamed without opening a window when neither the source nor the target is immutable. Perhaps there should be a rename_immutable syscall to do this if unsetting the immutable flags would work.)