diff options
Diffstat (limited to 'nscd/initgrcache.c')
| -rw-r--r-- | nscd/initgrcache.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/nscd/initgrcache.c b/nscd/initgrcache.c index bb6dee2b4e..eb03fc7a5d 100644 --- a/nscd/initgrcache.c +++ b/nscd/initgrcache.c @@ -26,8 +26,15 @@ #include <time.h> #include <unistd.h> #include <sys/mman.h> -#include <dbg_log.h> -#include <nscd.h> +#ifdef HAVE_SENDFILE +# include <sys/sendfile.h> +#endif + +#include "dbg_log.h" +#include "nscd.h" +#ifdef HAVE_SENDFILE +# include <kernel-features.h> +#endif #include "../nss/nsswitch.h" @@ -344,7 +351,29 @@ addinitgroupsX (struct database_dyn *db, int fd, request_header *req, unnecessarily let the receiver wait. */ assert (fd != -1); - written = writeall (fd, &dataset->resp, total); +#ifdef HAVE_SENDFILE + if (__builtin_expect (db->mmap_used, 1)) + { + assert (db->wr_fd != -1); + assert ((char *) &dataset->resp > (char *) db->data); + assert ((char *) &dataset->resp - (char *) db->head + + total + <= (sizeof (struct database_pers_head) + + db->head->module * sizeof (ref_t) + + db->head->data_size)); + off_t off = (char *) &dataset->resp - (char *) db->head; + written = sendfile (fd, db->wr_fd, &off, total); +# ifndef __ASSUME_SENDFILE + if (written == -1 && errno == ENOSYS) + goto use_write; +# endif + } + else +# ifndef __ASSUME_SENDFILE + use_write: +# endif +#endif + written = writeall (fd, &dataset->resp, total); } |