read slowly if can't mmap the file

SCCS-vsn: lib/libc/db/recno/rec_open.c 5.12

diff --git a/usr/src/lib/libc/db/recno/rec_open.c b/usr/src/lib/libc/db/recno/rec_open.c
index d44c9c0..8511cfb 100644 (file)
--- a/usr/src/lib/libc/db/recno/rec_open.c
+++ b/usr/src/lib/libc/db/recno/rec_open.c
@@ -9,7 +9,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)

-static char sccsid[] = "@(#)rec_open.c 5.11 (Berkeley) %G%";
+static char sccsid[] = "@(#)rec_open.c 5.12 (Berkeley) %G%";

 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/types.h>


@@ -92,7 +92,7 @@ __rec_open(fname, flags, mode, openinfo)
        if (fname != NULL)
                if (lseek(rfd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE) {
                        SET(t, BTF_RDONLY);
        if (fname != NULL)
                if (lseek(rfd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE) {
                        SET(t, BTF_RDONLY);

-                       if ((t->bt_rfp = fdopen(rfd, "r")) == NULL)
+slow:                  if ((t->bt_rfp = fdopen(rfd, "r")) == NULL)

                                goto err;
                        t->bt_irec =
                            ISSET(t, BTF_FIXEDLEN) ? __rec_fpipe : __rec_vpipe;
                                goto err;
                        t->bt_irec =
                            ISSET(t, BTF_FIXEDLEN) ? __rec_fpipe : __rec_vpipe;


@@ -116,7 +116,7 @@ __rec_open(fname, flags, mode, openinfo)
                        }
                        if ((t->bt_smap = mmap(NULL, (size_t)sb.st_size,
                            PROT_READ, 0, rfd, (off_t)0)) == (caddr_t)-1)
                        }
                        if ((t->bt_smap = mmap(NULL, (size_t)sb.st_size,
                            PROT_READ, 0, rfd, (off_t)0)) == (caddr_t)-1)

-                               goto err;
+                               goto slow;

                        t->bt_emap = t->bt_smap + sb.st_size;
                        t->bt_rfd = rfd;
                        t->bt_rfp = NULL;
                        t->bt_emap = t->bt_smap + sb.st_size;
                        t->bt_rfd = rfd;
                        t->bt_rfp = NULL;