diff options
Diffstat (limited to 'freebsd/lib/libc/resolv/res_state.c')
| -rw-r--r-- | freebsd/lib/libc/resolv/res_state.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/freebsd/lib/libc/resolv/res_state.c b/freebsd/lib/libc/resolv/res_state.c index a89b9b5e..1cfe1700 100644 --- a/freebsd/lib/libc/resolv/res_state.c +++ b/freebsd/lib/libc/resolv/res_state.c @@ -28,6 +28,8 @@ */ #include <sys/types.h> +#include <sys/stat.h> +#include <sys/time.h> #include <netinet/in.h> #include <arpa/nameser.h> #include <resolv.h> @@ -37,6 +39,8 @@ #include "reentrant.h" #include "un-namespace.h" +#include "res_private.h" + #undef _res struct __res_state _res; @@ -61,6 +65,37 @@ res_keycreate(void) res_thr_keycreated = thr_keycreate(&res_key, free_res) == 0; } +static res_state +res_check_reload(res_state statp) +{ + struct timespec now; + struct stat sb; + struct __res_state_ext *ext; + + if ((statp->options & RES_INIT) == 0) { + return (statp); + } + + ext = statp->_u._ext.ext; + if (ext == NULL || ext->reload_period == 0) { + return (statp); + } + + if (clock_gettime(CLOCK_MONOTONIC_FAST, &now) != 0 || + (now.tv_sec - ext->conf_stat) < ext->reload_period) { + return (statp); + } + + ext->conf_stat = now.tv_sec; + if (stat(_PATH_RESCONF, &sb) == 0 && + (sb.st_mtim.tv_sec != ext->conf_mtim.tv_sec || + sb.st_mtim.tv_nsec != ext->conf_mtim.tv_nsec)) { + statp->options &= ~RES_INIT; + } + + return (statp); +} + res_state __res_state(void) { @@ -68,7 +103,7 @@ __res_state(void) #ifndef __rtems__ if (thr_main() != 0) - return (&_res); + return res_check_reload(&_res); #endif /* __rtems__ */ if (thr_once(&res_init_once, res_keycreate) != 0 || @@ -77,7 +112,7 @@ __res_state(void) statp = thr_getspecific(res_key); if (statp != NULL) - return (statp); + return res_check_reload(statp); statp = calloc(1, sizeof(*statp)); if (statp == NULL) return (&_res); |