elf: Restore ldconfig libc6 implicit soname logic [BZ #30125]

While cleaning up old libc version support, the deprecated libc4 code was
accidentally kept in `implicit_soname`, instead of the libc6 code.

This causes additional symlinks to be created by `ldconfig` for libraries
without a soname, e.g. a library `libsomething.123.456.789` without a soname
will create a `libsomething.123` -> `libsomething.123.456.789` symlink.

As the libc6 version of the `implicit_soname` code is a trivial `xstrdup`,
just inline it and remove `implicit_soname` altogether.

Some further simplification looks possible (e.g. the call to `create_links`
looks like a no-op if `soname == NULL`, other than the verbose printfs), but
logic is kept as-is for now.

Fixes: BZ #30125
Fixes: 8ee878592c4a ("Assume only FLAG_ELF_LIBC6 suport")
Signed-off-by: Joan Bruguera <joanbrugueram@gmail.com>

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 0 insertions, 19 deletions

diff --git a/elf/readlib.c b/elf/readlib.c
index c5c3591..bc13d9a 100644
--- a/elf/readlib.c
+++ b/elf/readlib.c
@@ -166,24 +166,5 @@ process_file (const char *real_file_name, const char *file_name,
   return ret;
 }
 
-/* Returns made up soname if lib doesn't have explicit DT_SONAME.  */
-
-char *
-implicit_soname (const char *lib, int flag)
-{
-  char *soname = xstrdup (lib);
-
-  /* Aout files don't have a soname, just return the name
-     including the major number.  */
-  char *major = strstr (soname, ".so.");
-  if (major)
-    {
-      char *dot = strstr (major + 4, ".");
-      if (dot)
-	*dot = '\0';
-    }
-  return soname;
-}
-
 /* Get architecture specific version of process_elf_file.  */
 #include <readelflib.c>