diff options
Diffstat (limited to 'libc/inet/resolv.c')
| -rw-r--r-- | libc/inet/resolv.c | 110 |
1 files changed, 55 insertions, 55 deletions
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c index 8546b279a..ae0dce520 100644 --- a/libc/inet/resolv.c +++ b/libc/inet/resolv.c @@ -3530,6 +3530,61 @@ __res_vinit(res_state rp, int preinit) return 0; } +static unsigned int +res_randomid(void) +{ + return 0xffff & getpid(); +} + +/* Our res_init never fails (always returns 0) */ +int +res_init(void) +{ + /* + * These three fields used to be statically initialized. This made + * it hard to use this code in a shared library. It is necessary, + * now that we're doing dynamic initialization here, that we preserve + * the old semantics: if an application modifies one of these three + * fields of _res before res_init() is called, res_init() will not + * alter them. Of course, if an application is setting them to + * _zero_ before calling res_init(), hoping to override what used + * to be the static default, we can't detect it and unexpected results + * will follow. Zero for any of these fields would make no sense, + * so one can safely assume that the applications were already getting + * unexpected results. + * + * _res.options is tricky since some apps were known to diddle the bits + * before res_init() was first called. We can't replicate that semantic + * with dynamic initialization (they may have turned bits off that are + * set in RES_DEFAULT). Our solution is to declare such applications + * "broken". They could fool us by setting RES_INIT but none do (yet). + */ + + __UCLIBC_MUTEX_LOCK(__resolv_lock); + + if (!_res.retrans) + _res.retrans = RES_TIMEOUT; + if (!_res.retry) + _res.retry = 4; + if (!(_res.options & RES_INIT)) + _res.options = RES_DEFAULT; + + /* + * This one used to initialize implicitly to zero, so unless the app + * has set it to something in particular, we can randomize it now. + */ + if (!_res.id) + _res.id = res_randomid(); + + __UCLIBC_MUTEX_UNLOCK(__resolv_lock); + + __res_vinit(&_res, 1); + __res_sync = res_sync_func; + + return 0; +} +libc_hidden_def(res_init) + static void __res_iclose(res_state statp) { @@ -3600,61 +3655,6 @@ struct __res_state *__resp = &_res; # endif #endif /* !__UCLIBC_HAS_THREADS__ */ -static unsigned int -res_randomid(void) -{ - return 0xffff & getpid(); -} - -/* Our res_init never fails (always returns 0) */ -int -res_init(void) -{ - /* - * These three fields used to be statically initialized. This made - * it hard to use this code in a shared library. It is necessary, - * now that we're doing dynamic initialization here, that we preserve - * the old semantics: if an application modifies one of these three - * fields of _res before res_init() is called, res_init() will not - * alter them. Of course, if an application is setting them to - * _zero_ before calling res_init(), hoping to override what used - * to be the static default, we can't detect it and unexpected results - * will follow. Zero for any of these fields would make no sense, - * so one can safely assume that the applications were already getting - * unexpected results. - * - * _res.options is tricky since some apps were known to diddle the bits - * before res_init() was first called. We can't replicate that semantic - * with dynamic initialization (they may have turned bits off that are - * set in RES_DEFAULT). Our solution is to declare such applications - * "broken". They could fool us by setting RES_INIT but none do (yet). - */ - - __UCLIBC_MUTEX_LOCK(__resolv_lock); - - if (!_res.retrans) - _res.retrans = RES_TIMEOUT; - if (!_res.retry) - _res.retry = 4; - if (!(_res.options & RES_INIT)) - _res.options = RES_DEFAULT; - - /* - * This one used to initialize implicitly to zero, so unless the app - * has set it to something in particular, we can randomize it now. - */ - if (!_res.id) - _res.id = res_randomid(); - - __UCLIBC_MUTEX_UNLOCK(__resolv_lock); - - __res_vinit(&_res, 1); - __res_sync = res_sync_func; - - return 0; -} -libc_hidden_def(res_init) - /* * Set up default settings. If the configuration file exist, the values * there will have precedence. Otherwise, the server address is set to |