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Update.

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* elf/elf.h: Add dynamic tag definitions for prelinking.

	* elf/rtld.c (process_envvars): Avoid using array of string pointers.
	Rewrite code to remove environment varables for SUID binaries.
	Small optimization in LD_PROFILE handling.
	* sysdeps/generic/unsecvars.h: Adjust format for process_envvars
	changes.
	* sysdeps/unix/sysv/linux/i386/dl-librecon.h: Likewise.

	* sysdeps/generic/dl-sysdep.c: Don't initialize _dl_cpuclock_offset.
This commit is contained in:
Ulrich Drepper
2001-11-06 00:16:32 +00:00
parent ea41b9267d
commit c95f3fd42e
6 changed files with 54 additions and 41 deletions
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39
elf/rtld.c
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@@ -1345,7 +1345,7 @@ process_envvars (enum mode *modep)
}
/* Which shared object shall be profiled. */
if (memcmp (envline, "PROFILE", 7) == 0)
if (memcmp (envline, "PROFILE", 7) == 0 && envline[8] != '\0')
_dl_profile = &envline[8];
break;
@@ -1430,38 +1430,27 @@ process_envvars (enum mode *modep)
variables. */
if (__builtin_expect (__libc_enable_secure, 0))
{
static const char *unsecure_envvars[] =
{
UNSECURE_ENVVARS,
static const char unsecure_envvars[] =
#ifdef EXTRA_UNSECURE_ENVVARS
EXTRA_UNSECURE_ENVVARS
#endif
};
size_t cnt;
UNSECURE_ENVVARS;
const char *nextp;
if (preloadlist != NULL)
unsetenv ("LD_PRELOAD");
if (library_path != NULL)
unsetenv ("LD_LIBRARY_PATH");
if (_dl_origin_path != NULL)
unsetenv ("LD_ORIGIN_PATH");
if (debug_output != NULL)
unsetenv ("LD_DEBUG_OUTPUT");
if (_dl_profile != NULL)
unsetenv ("LD_PROFILE");
for (cnt = 0;
cnt < sizeof (unsecure_envvars) / sizeof (unsecure_envvars[0]);
++cnt)
unsetenv (unsecure_envvars[cnt]);
nextp = unsecure_envvars;
do
{
unsetenv (nextp);
nextp = (char *) rawmemchr (nextp, '\0') + 1;
}
while (*nextp != '\0');
if (__access ("/etc/suid-debug", F_OK) != 0)
unsetenv ("MALLOC_CHECK_");
}
/* The name of the object to profile cannot be empty. */
if (_dl_profile != NULL && *_dl_profile == '\0')
_dl_profile = NULL;
/* The caller wants this information. */
*modep = mode;
/* If we have to run the dynamic linker in debugging mode and the
LD_DEBUG_OUTPUT environment variable is given, we write the debug
@@ -1487,8 +1476,6 @@ process_envvars (enum mode *modep)
/* We use standard output if opening the file failed. */
_dl_debug_fd = STDOUT_FILENO;
}
*modep = mode;
}