diff options
Diffstat (limited to 'man3/dbopen.3')
| -rw-r--r-- | man3/dbopen.3 | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/man3/dbopen.3 b/man3/dbopen.3 index a6d418a..516768b 100644 --- a/man3/dbopen.3 +++ b/man3/dbopen.3 @@ -5,7 +5,7 @@ .\" .\" @(#)dbopen.3 8.5 (Berkeley) 1/2/94 .\" -.TH dbopen 3 2022-12-04 "Linux man-pages 6.05.01" +.TH dbopen 3 2023-10-31 "Linux man-pages 6.7" .UC 7 .SH NAME dbopen \- database access methods @@ -18,7 +18,7 @@ Standard C library .B #include <limits.h> .B #include <db.h> .B #include <fcntl.h> -.PP +.P .BI "DB *dbopen(const char *" file ", int " flags ", int " mode \ ", DBTYPE " type , .BI " const void *" openinfo ); @@ -30,7 +30,7 @@ Since glibc 2.2, glibc no longer provides these interfaces. Probably, you are looking for the APIs provided by the .I libdb library instead. -.PP +.P .BR dbopen () is the library interface to database files. The supported file formats are btree, hashed, and UNIX file oriented. @@ -44,7 +44,7 @@ in their respective manual pages .BR hash (3), and .BR recno (3). -.PP +.P .BR dbopen () opens .I file @@ -53,7 +53,7 @@ Files never intended to be preserved on disk may be created by setting the .I file argument to NULL. -.PP +.P The .I flags and @@ -93,7 +93,7 @@ is not possible.) .\"DB_TXN .\"Support transactions in the database. .\"The DB_LOCK and DB_SHMEM flags must be set as well. -.PP +.P The .I type argument is of type @@ -106,7 +106,7 @@ may be set to .BR DB_HASH , or .BR DB_RECNO . -.PP +.P The .I openinfo argument is a pointer to an access-method-specific structure described @@ -115,7 +115,7 @@ If .I openinfo is NULL, each access method will use defaults appropriate for the system and the access method. -.PP +.P .BR dbopen () returns a pointer to a .I DB @@ -126,7 +126,7 @@ structure is defined in the .I <db.h> include file, and contains at least the following fields: -.PP +.P .in +4n .EX typedef struct { @@ -144,7 +144,7 @@ typedef struct { } DB; .EE .in -.PP +.P These elements describe a database type and a set of functions performing various actions. These functions take a pointer to a structure as returned by @@ -428,7 +428,7 @@ and 0 on success. .SS Key/data pairs Access to all file types is based on key/data pairs. Both keys and data are represented by the following data structure: -.PP +.P .in +4n .EX typedef struct { @@ -437,7 +437,7 @@ typedef struct { } DBT; .EE .in -.PP +.P The elements of the .I DBT structure are defined as follows: @@ -447,7 +447,7 @@ A pointer to a byte string. .TP .I size The length of the byte string. -.PP +.P Key and data byte strings may reference strings of essentially unlimited length although any two of them must fit into available memory at the same time. @@ -473,7 +473,7 @@ incompatible with the current file specification or which is not meaningful for the function (for example, use of the cursor without prior initialization) or there is a mismatch between the version number of file and the software. -.PP +.P The .I close routines may fail and set @@ -485,7 +485,7 @@ for any of the errors specified for the library routines .BR free (3), or .BR fsync (2). -.PP +.P The .IR del , .IR get , @@ -500,7 +500,7 @@ for any of the errors specified for the library routines .BR free (3), or .BR malloc (3). -.PP +.P The .I fd routines will fail and set @@ -508,7 +508,7 @@ routines will fail and set to .B ENOENT for in memory databases. -.PP +.P The .I sync routines may fail and set @@ -520,10 +520,10 @@ The typedef .I DBT is a mnemonic for "data base thang", and was used because no one could think of a reasonable name that wasn't already used. -.PP +.P The file descriptor interface is a kludge and will be deleted in a future version of the interface. -.PP +.P None of the access methods provide any form of concurrent access, locking, or transactions. .SH SEE ALSO @@ -531,6 +531,6 @@ locking, or transactions. .BR hash (3), .BR mpool (3), .BR recno (3) -.PP +.P .IR "LIBTP: Portable, Modular Transactions for UNIX" , Margo Seltzer, Michael Olson, USENIX proceedings, Winter 1992. |