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Implement RTLD_NEXT and fix RTLD_DEFAULT for HP-UX.

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This commit is contained in:
Todd C. Miller
2012-05-09 09:46:38 -04:00
parent 340ae13231
commit aa7ac09faa
1 changed files with 19 additions and 6 deletions
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25
compat/dlopen.c
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@@ -77,13 +77,26 @@ sudo_dlsym(void *vhandle, const char *symbol)
shl_t handle = vhandle; shl_t handle = vhandle;
void *value = NULL; void *value = NULL;
/* RTLD_NEXT is not unsupported with shl_findsym(). */ /*
if (vhandle == RTLD_DEFAULT) * Note that the behavior of of RTLD_NEXT and RTLD_SELF
(void)shl_findsym(NULL, symbol, TYPE_UNDEFINED, &value); * differs from most implementations when called from
else if (vhandle == RTLD_SELF) * a shared library.
(void)shl_findsym(PROG_HANDLE, symbol, TYPE_UNDEFINED, &value); */
else if (vhandle != RTLD_NEXT) if (vhandle == RTLD_NEXT) {
/* Iterate over all shared libs looking for symbol. */
struct shl_descriptor *desc;
int idx = 0;
while (shl_get(idx++, &desc) == 0) {
if (shl_findsym(&desc->handle, symbol, TYPE_UNDEFINED, &value) == 0)
break;
}
} else {
if (vhandle == RTLD_DEFAULT)
handle = NULL;
else if (vhandle == RTLD_SELF)
handle = PROG_HANDLE;
(void)shl_findsym(&handle, symbol, TYPE_UNDEFINED, &value); (void)shl_findsym(&handle, symbol, TYPE_UNDEFINED, &value);
}
return value; return value;
} }