1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)rec_close.c 8.3 (Berkeley) 02/21/94"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/types.h> 13 #include <sys/uio.h> 14 #include <sys/mman.h> 15 16 #include <errno.h> 17 #include <limits.h> 18 #include <stdio.h> 19 #include <unistd.h> 20 21 #include <db.h> 22 #include "recno.h" 23 24 /* 25 * __REC_CLOSE -- Close a recno tree. 26 * 27 * Parameters: 28 * dbp: pointer to access method 29 * 30 * Returns: 31 * RET_ERROR, RET_SUCCESS 32 */ 33 int 34 __rec_close(dbp) 35 DB *dbp; 36 { 37 BTREE *t; 38 int status; 39 40 t = dbp->internal; 41 42 /* Toss any page pinned across calls. */ 43 if (t->bt_pinned != NULL) { 44 mpool_put(t->bt_mp, t->bt_pinned, 0); 45 t->bt_pinned = NULL; 46 } 47 48 if (__rec_sync(dbp, 0) == RET_ERROR) 49 return (RET_ERROR); 50 51 /* Committed to closing. */ 52 status = RET_SUCCESS; 53 if (ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize)) 54 status = RET_ERROR; 55 56 if (!ISSET(t, R_INMEM)) 57 if (ISSET(t, R_CLOSEFP)) { 58 if (fclose(t->bt_rfp)) 59 status = RET_ERROR; 60 } else 61 if (close(t->bt_rfd)) 62 status = RET_ERROR; 63 64 if (__bt_close(dbp) == RET_ERROR) 65 status = RET_ERROR; 66 67 return (status); 68 } 69 70 /* 71 * __REC_SYNC -- sync the recno tree to disk. 72 * 73 * Parameters: 74 * dbp: pointer to access method 75 * 76 * Returns: 77 * RET_SUCCESS, RET_ERROR. 78 */ 79 int 80 __rec_sync(dbp, flags) 81 const DB *dbp; 82 u_int flags; 83 { 84 struct iovec iov[2]; 85 BTREE *t; 86 DBT data, key; 87 off_t off; 88 recno_t scursor, trec; 89 int status; 90 91 t = dbp->internal; 92 93 /* Toss any page pinned across calls. */ 94 if (t->bt_pinned != NULL) { 95 mpool_put(t->bt_mp, t->bt_pinned, 0); 96 t->bt_pinned = NULL; 97 } 98 99 if (flags == R_RECNOSYNC) 100 return (__bt_sync(dbp, 0)); 101 102 if (ISSET(t, R_RDONLY | R_INMEM) || !ISSET(t, R_MODIFIED)) 103 return (RET_SUCCESS); 104 105 /* Read any remaining records into the tree. */ 106 if (!ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR) 107 return (RET_ERROR); 108 109 /* Rewind the file descriptor. */ 110 if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0) 111 return (RET_ERROR); 112 113 iov[1].iov_base = "\n"; 114 iov[1].iov_len = 1; 115 scursor = t->bt_rcursor; 116 117 key.size = sizeof(recno_t); 118 key.data = &trec; 119 120 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 121 while (status == RET_SUCCESS) { 122 iov[0].iov_base = data.data; 123 iov[0].iov_len = data.size; 124 if (writev(t->bt_rfd, iov, 2) != data.size + 1) 125 return (RET_ERROR); 126 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 127 } 128 t->bt_rcursor = scursor; 129 if (status == RET_ERROR) 130 return (RET_ERROR); 131 if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1) 132 return (RET_ERROR); 133 if (ftruncate(t->bt_rfd, off)) 134 return (RET_ERROR); 135 CLR(t, R_MODIFIED); 136 return (RET_SUCCESS); 137 } 138