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 8.1 (Berkeley) 06/04/93"; 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 rval; 39 40 if (__rec_sync(dbp, 0) == RET_ERROR) 41 return (RET_ERROR); 42 43 /* Committed to closing. */ 44 t = dbp->internal; 45 46 rval = RET_SUCCESS; 47 if (ISSET(t, R_MEMMAPPED) && munmap(t->bt_smap, t->bt_msize)) 48 rval = RET_ERROR; 49 50 if (!ISSET(t, R_INMEM)) 51 if (ISSET(t, R_CLOSEFP)) { 52 if (fclose(t->bt_rfp)) 53 rval = RET_ERROR; 54 } else 55 if (close(t->bt_rfd)) 56 rval = RET_ERROR; 57 58 if (__bt_close(dbp) == RET_ERROR) 59 rval = RET_ERROR; 60 61 return (rval); 62 } 63 64 /* 65 * __REC_SYNC -- sync the recno tree to disk. 66 * 67 * Parameters: 68 * dbp: pointer to access method 69 * 70 * Returns: 71 * RET_SUCCESS, RET_ERROR. 72 */ 73 int 74 __rec_sync(dbp, flags) 75 const DB *dbp; 76 u_int flags; 77 { 78 struct iovec iov[2]; 79 BTREE *t; 80 DBT data, key; 81 off_t off; 82 recno_t scursor, trec; 83 int status; 84 85 t = dbp->internal; 86 87 if (flags == R_RECNOSYNC) 88 return (__bt_sync(dbp, 0)); 89 90 if (ISSET(t, R_RDONLY | R_INMEM) || !ISSET(t, R_MODIFIED)) 91 return (RET_SUCCESS); 92 93 /* Read any remaining records into the tree. */ 94 if (!ISSET(t, R_EOF) && t->bt_irec(t, MAX_REC_NUMBER) == RET_ERROR) 95 return (RET_ERROR); 96 97 /* Rewind the file descriptor. */ 98 if (lseek(t->bt_rfd, (off_t)0, SEEK_SET) != 0) 99 return (RET_ERROR); 100 101 iov[1].iov_base = "\n"; 102 iov[1].iov_len = 1; 103 scursor = t->bt_rcursor; 104 105 key.size = sizeof(recno_t); 106 key.data = &trec; 107 108 status = (dbp->seq)(dbp, &key, &data, R_FIRST); 109 while (status == RET_SUCCESS) { 110 iov[0].iov_base = data.data; 111 iov[0].iov_len = data.size; 112 if (writev(t->bt_rfd, iov, 2) != data.size + 1) 113 return (RET_ERROR); 114 status = (dbp->seq)(dbp, &key, &data, R_NEXT); 115 } 116 t->bt_rcursor = scursor; 117 if (status == RET_ERROR) 118 return (RET_ERROR); 119 if ((off = lseek(t->bt_rfd, (off_t)0, SEEK_CUR)) == -1) 120 return (RET_ERROR); 121 if (ftruncate(t->bt_rfd, off)) 122 return (RET_ERROR); 123 CLR(t, R_MODIFIED); 124 return (RET_SUCCESS); 125 } 126