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<title>Berkeley DB: db_env_create</title>
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<h1>db_env_create</h1>
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db_env_create(DB_ENV **dbenvp, u_int32_t flags);
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<p>The db_env_create function creates a DB_ENV structure that is the
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handle for a Berkeley DB environment. A pointer to this structure is returned
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in the memory to which <b>dbenvp</b> refers.
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<p>The <b>flags</b> value must be set to 0 or
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<p><dt><a name="DB_CLIENT">DB_CLIENT</a><dd>Create a client environment to connect to a server.
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<p>The DB_CLIENT flag indicates to the system that this environment
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is remote on a server. The use of this flag causes the environment
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methods to use functions that call a server instead of local functions.
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Prior to making any environment or database method calls, the application
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must call the <a href="../api_c/env_set_rpc_server.html">DB_ENV->set_rpc_server</a> function to establish the
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connection to the server.
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<p>The DB_ENV handle contains a special field, "app_private", which
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is declared as type "void *". This field is provided for the use of
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the application program. It is initialized to NULL and is not further
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used by Berkeley DB in any way.
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<p>The db_env_create function returns a non-zero error value on failure and 0 on success.
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<p>The db_env_create function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
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If a catastrophic error has occurred, the db_env_create function may fail and return
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<a href="../ref/program/errorret.html#DB_RUNRECOVERY">DB_RUNRECOVERY</a>, in which case all subsequent Berkeley DB calls will fail
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<a href="../api_c/env_create.html">db_env_create</a>,
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<a href="../api_c/env_close.html">DB_ENV->close</a>,
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<a href="../api_c/env_err.html">DB_ENV->err</a>, <a href="../api_c/env_err.html">DB_ENV->errx</a>
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<a href="../api_c/env_open.html">DB_ENV->open</a>,
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<a href="../api_c/env_remove.html">DB_ENV->remove</a>,
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<a href="../api_c/env_set_alloc.html">DB_ENV->set_alloc</a>,
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<a href="../api_c/env_set_cachesize.html">DB_ENV->set_cachesize</a>,
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<a href="../api_c/env_set_data_dir.html">DB_ENV->set_data_dir</a>,
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<a href="../api_c/env_set_errcall.html">DB_ENV->set_errcall</a>,
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<a href="../api_c/env_set_errfile.html">DB_ENV->set_errfile</a>,
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<a href="../api_c/env_set_errpfx.html">DB_ENV->set_errpfx</a>,
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<a href="../api_c/env_set_feedback.html">DB_ENV->set_feedback</a>,
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<a href="../api_c/env_set_flags.html">DB_ENV->set_flags</a>,
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<a href="../api_c/env_set_mutexlocks.html">DB_ENV->set_mutexlocks</a>,
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<a href="../api_c/env_set_pageyield.html">db_env_set_pageyield</a>,
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<a href="../api_c/env_set_paniccall.html">DB_ENV->set_paniccall</a>,
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<a href="../api_c/env_set_panicstate.html">db_env_set_panicstate</a>,
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<a href="../api_c/env_set_rec_init.html">DB_ENV->set_recovery_init</a>,
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<a href="../api_c/env_set_rpc_server.html">DB_ENV->set_rpc_server</a>,
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<a href="../api_c/env_set_region_init.html">db_env_set_region_init</a>,
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<a href="../api_c/env_set_shm_key.html">DB_ENV->set_shm_key</a>,
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<a href="../api_c/env_set_tas_spins.html">db_env_set_tas_spins</a>,
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<a href="../api_c/env_set_tmp_dir.html">DB_ENV->set_tmp_dir</a>,
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<a href="../api_c/env_set_verbose.html">DB_ENV->set_verbose</a>,
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<a href="../api_c/env_strerror.html">db_strerror</a>
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<a href="../api_c/env_version.html">db_version</a>.
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