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* include/libvirt/libvirt.h include/libvirt/libvirt.h.in: remove Xen centric comments patch from Guido Günther * docs/apibuild.py: ignore VIR_DEPRECATED * docs/libvirt-*.xml docs/html/libvirt-*.html: regenerated the documentation for the API Daniel
224 lines
20 KiB
HTML
224 lines
20 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<title>virterror: error handling interfaces for the libvirt library</title>
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<th width="100%" align="center">libvirt Reference Manual</th>
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<h2>
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<span class="refentrytitle">virterror</span>
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</h2>
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<p>virterror - error handling interfaces for the libvirt library</p>
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<p>Provides the interfaces of the libvirt library to handle errors raised while using the library. </p>
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<p>Author(s): Daniel Veillard <veillard@redhat.com> </p>
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<div class="refsynopsisdiv">
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<h2>Synopsis</h2>
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<pre class="synopsis">typedef <a href="libvirt-virterror.html#virError">virError</a> * <a href="#virErrorPtr">virErrorPtr</a>;
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typedef enum <a href="#virErrorLevel">virErrorLevel</a>;
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typedef enum <a href="#virErrorDomain">virErrorDomain</a>;
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typedef enum <a href="#virErrorNumber">virErrorNumber</a>;
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typedef struct _virError <a href="#virError">virError</a>;
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int <a href="#virCopyLastError">virCopyLastError</a> (<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> to);
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void <a href="#virConnSetErrorFunc">virConnSetErrorFunc</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> void * userData, <br/> <a href="libvirt-virterror.html#virErrorFunc">virErrorFunc</a> handler);
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void <a href="#virResetLastError">virResetLastError</a> (void);
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typedef void <a href="#virErrorFunc">virErrorFunc</a> (void * userData, <br/> <a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> error);
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void <a href="#virResetError">virResetError</a> (<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> err);
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<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> <a href="#virConnGetLastError">virConnGetLastError</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn);
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void <a href="#virDefaultErrorFunc">virDefaultErrorFunc</a> (<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> err);
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<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> <a href="#virGetLastError">virGetLastError</a> (void);
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void <a href="#virSetErrorFunc">virSetErrorFunc</a> (void * userData, <br/> <a href="libvirt-virterror.html#virErrorFunc">virErrorFunc</a> handler);
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int <a href="#virConnCopyLastError">virConnCopyLastError</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> <a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> to);
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void <a href="#virConnResetLastError">virConnResetLastError</a> (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn);
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</pre>
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</div>
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<div class="refsect1" lang="en">
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<h2>Description</h2>
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</div>
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<div class="refsect1" lang="en">
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<h2>Details</h2>
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<div class="refsect2" lang="en">
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<div class="refsect2" lang="en"><h3><a name="virError">Structure </a>virError</h3><pre class="programlisting">struct _virError {
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int code : The error code, a <a href="libvirt-virterror.html#virErrorNumber">virErrorNumber</a>
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int domain : What part of the library raised this error
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char * message : human-readable informative error message
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<a href="libvirt-virterror.html#virErrorLevel">virErrorLevel</a> level : how consequent is the error
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<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn : connection if available, see note above
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<a href="libvirt-libvirt.html#virDomainPtr">virDomainPtr</a> dom : domain if available, see note above
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char * str1 : extra string information
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char * str2 : extra string information
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char * str3 : extra string information
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int int1 : extra number information
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int int2 : extra number information
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<a href="libvirt-libvirt.html#virNetworkPtr">virNetworkPtr</a> net : network if available, see note above
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} virError;
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</pre><p/>
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</div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virErrorDomain">Enum </a>virErrorDomain</h3><pre class="programlisting">enum <a href="#virErrorDomain">virErrorDomain</a> {
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<a name="VIR_FROM_NONE">VIR_FROM_NONE</a> = 0
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<a name="VIR_FROM_XEN">VIR_FROM_XEN</a> = 1 /* Error at Xen hypervisor layer */
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<a name="VIR_FROM_XEND">VIR_FROM_XEND</a> = 2 /* Error at connection with xend daemon */
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<a name="VIR_FROM_XENSTORE">VIR_FROM_XENSTORE</a> = 3 /* Error at connection with xen store */
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<a name="VIR_FROM_SEXPR">VIR_FROM_SEXPR</a> = 4 /* Error in the S-Expression code */
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<a name="VIR_FROM_XML">VIR_FROM_XML</a> = 5 /* Error in the XML code */
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<a name="VIR_FROM_DOM">VIR_FROM_DOM</a> = 6 /* Error when operating on a domain */
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<a name="VIR_FROM_RPC">VIR_FROM_RPC</a> = 7 /* Error in the XML-RPC code */
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<a name="VIR_FROM_PROXY">VIR_FROM_PROXY</a> = 8 /* Error in the proxy code */
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<a name="VIR_FROM_CONF">VIR_FROM_CONF</a> = 9 /* Error in the configuration file handling */
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<a name="VIR_FROM_QEMU">VIR_FROM_QEMU</a> = 10 /* Error at the QEMU daemon */
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<a name="VIR_FROM_NET">VIR_FROM_NET</a> = 11 /* Error when operating on a network */
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<a name="VIR_FROM_TEST">VIR_FROM_TEST</a> = 12 /* Error from test driver */
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<a name="VIR_FROM_REMOTE">VIR_FROM_REMOTE</a> = 13 /* Error from remote driver */
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<a name="VIR_FROM_OPENVZ">VIR_FROM_OPENVZ</a> = 14 /* Error from OpenVZ driver */
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<a name="VIR_FROM_XENXM">VIR_FROM_XENXM</a> = 15 /* Error at Xen XM layer */
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<a name="VIR_FROM_STATS_LINUX">VIR_FROM_STATS_LINUX</a> = 16 /* Error in the Linux Stats code */
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<a name="VIR_FROM_LXC">VIR_FROM_LXC</a> = 17 /* Error from Linux Container driver */
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<a name="VIR_FROM_STORAGE">VIR_FROM_STORAGE</a> = 18 /* Error from storage driver */
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<a name="VIR_FROM_NETWORK">VIR_FROM_NETWORK</a> = 19 /* Error from network config */
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<a name="VIR_FROM_DOMAIN">VIR_FROM_DOMAIN</a> = 20 /* Error from domain config */
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};
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</pre><p/>
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</div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virErrorLevel">Enum </a>virErrorLevel</h3><pre class="programlisting">enum <a href="#virErrorLevel">virErrorLevel</a> {
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<a name="VIR_ERR_NONE">VIR_ERR_NONE</a> = 0
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<a name="VIR_ERR_WARNING">VIR_ERR_WARNING</a> = 1 /* A simple warning */
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<a name="VIR_ERR_ERROR">VIR_ERR_ERROR</a> = 2 /* An error */
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};
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</pre><p/>
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</div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virErrorNumber">Enum </a>virErrorNumber</h3><pre class="programlisting">enum <a href="#virErrorNumber">virErrorNumber</a> {
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<a name="VIR_ERR_OK">VIR_ERR_OK</a> = 0
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<a name="VIR_ERR_INTERNAL_ERROR">VIR_ERR_INTERNAL_ERROR</a> = 1 /* internal error */
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<a name="VIR_ERR_NO_MEMORY">VIR_ERR_NO_MEMORY</a> = 2 /* memory allocation failure */
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<a name="VIR_ERR_NO_SUPPORT">VIR_ERR_NO_SUPPORT</a> = 3 /* no support for this function */
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<a name="VIR_ERR_UNKNOWN_HOST">VIR_ERR_UNKNOWN_HOST</a> = 4 /* could not resolve hostname */
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<a name="VIR_ERR_NO_CONNECT">VIR_ERR_NO_CONNECT</a> = 5 /* can't connect to hypervisor */
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<a name="VIR_ERR_INVALID_CONN">VIR_ERR_INVALID_CONN</a> = 6 /* invalid connection object */
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<a name="VIR_ERR_INVALID_DOMAIN">VIR_ERR_INVALID_DOMAIN</a> = 7 /* invalid domain object */
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<a name="VIR_ERR_INVALID_ARG">VIR_ERR_INVALID_ARG</a> = 8 /* invalid function argument */
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<a name="VIR_ERR_OPERATION_FAILED">VIR_ERR_OPERATION_FAILED</a> = 9 /* a command to hypervisor failed */
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<a name="VIR_ERR_GET_FAILED">VIR_ERR_GET_FAILED</a> = 10 /* a HTTP GET command to failed */
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<a name="VIR_ERR_POST_FAILED">VIR_ERR_POST_FAILED</a> = 11 /* a HTTP POST command to failed */
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<a name="VIR_ERR_HTTP_ERROR">VIR_ERR_HTTP_ERROR</a> = 12 /* unexpected HTTP error code */
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<a name="VIR_ERR_SEXPR_SERIAL">VIR_ERR_SEXPR_SERIAL</a> = 13 /* failure to serialize an S-Expr */
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<a name="VIR_ERR_NO_XEN">VIR_ERR_NO_XEN</a> = 14 /* could not open Xen hypervisor control */
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<a name="VIR_ERR_XEN_CALL">VIR_ERR_XEN_CALL</a> = 15 /* failure doing an hypervisor call */
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<a name="VIR_ERR_OS_TYPE">VIR_ERR_OS_TYPE</a> = 16 /* unknown OS type */
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<a name="VIR_ERR_NO_KERNEL">VIR_ERR_NO_KERNEL</a> = 17 /* missing kernel information */
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<a name="VIR_ERR_NO_ROOT">VIR_ERR_NO_ROOT</a> = 18 /* missing root device information */
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<a name="VIR_ERR_NO_SOURCE">VIR_ERR_NO_SOURCE</a> = 19 /* missing source device information */
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<a name="VIR_ERR_NO_TARGET">VIR_ERR_NO_TARGET</a> = 20 /* missing target device information */
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<a name="VIR_ERR_NO_NAME">VIR_ERR_NO_NAME</a> = 21 /* missing domain name information */
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<a name="VIR_ERR_NO_OS">VIR_ERR_NO_OS</a> = 22 /* missing domain OS information */
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<a name="VIR_ERR_NO_DEVICE">VIR_ERR_NO_DEVICE</a> = 23 /* missing domain devices information */
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<a name="VIR_ERR_NO_XENSTORE">VIR_ERR_NO_XENSTORE</a> = 24 /* could not open Xen Store control */
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<a name="VIR_ERR_DRIVER_FULL">VIR_ERR_DRIVER_FULL</a> = 25 /* too many drivers registered */
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<a name="VIR_ERR_CALL_FAILED">VIR_ERR_CALL_FAILED</a> = 26 /* not supported by the drivers (DEPRECATED) */
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<a name="VIR_ERR_XML_ERROR">VIR_ERR_XML_ERROR</a> = 27 /* an XML description is not well formed or broken */
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<a name="VIR_ERR_DOM_EXIST">VIR_ERR_DOM_EXIST</a> = 28 /* the domain already exist */
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<a name="VIR_ERR_OPERATION_DENIED">VIR_ERR_OPERATION_DENIED</a> = 29 /* operation forbidden on read-only connections */
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<a name="VIR_ERR_OPEN_FAILED">VIR_ERR_OPEN_FAILED</a> = 30 /* failed to open a conf file */
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<a name="VIR_ERR_READ_FAILED">VIR_ERR_READ_FAILED</a> = 31 /* failed to read a conf file */
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<a name="VIR_ERR_PARSE_FAILED">VIR_ERR_PARSE_FAILED</a> = 32 /* failed to parse a conf file */
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<a name="VIR_ERR_CONF_SYNTAX">VIR_ERR_CONF_SYNTAX</a> = 33 /* failed to parse the syntax of a conf file */
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<a name="VIR_ERR_WRITE_FAILED">VIR_ERR_WRITE_FAILED</a> = 34 /* failed to write a conf file */
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<a name="VIR_ERR_XML_DETAIL">VIR_ERR_XML_DETAIL</a> = 35 /* detail of an XML error */
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<a name="VIR_ERR_INVALID_NETWORK">VIR_ERR_INVALID_NETWORK</a> = 36 /* invalid network object */
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<a name="VIR_ERR_NETWORK_EXIST">VIR_ERR_NETWORK_EXIST</a> = 37 /* the network already exist */
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<a name="VIR_ERR_SYSTEM_ERROR">VIR_ERR_SYSTEM_ERROR</a> = 38 /* general system call failure */
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<a name="VIR_ERR_RPC">VIR_ERR_RPC</a> = 39 /* some sort of RPC error */
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<a name="VIR_ERR_GNUTLS_ERROR">VIR_ERR_GNUTLS_ERROR</a> = 40 /* error from a GNUTLS call */
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<a name="VIR_WAR_NO_NETWORK">VIR_WAR_NO_NETWORK</a> = 41 /* failed to start network */
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<a name="VIR_ERR_NO_DOMAIN">VIR_ERR_NO_DOMAIN</a> = 42 /* domain not found or unexpectedly disappeared */
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<a name="VIR_ERR_NO_NETWORK">VIR_ERR_NO_NETWORK</a> = 43 /* network not found */
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<a name="VIR_ERR_INVALID_MAC">VIR_ERR_INVALID_MAC</a> = 44 /* invalid MAC address */
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<a name="VIR_ERR_AUTH_FAILED">VIR_ERR_AUTH_FAILED</a> = 45 /* authentication failed */
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<a name="VIR_ERR_INVALID_STORAGE_POOL">VIR_ERR_INVALID_STORAGE_POOL</a> = 46 /* invalid storage pool object */
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<a name="VIR_ERR_INVALID_STORAGE_VOL">VIR_ERR_INVALID_STORAGE_VOL</a> = 47 /* invalid storage vol object */
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<a name="VIR_WAR_NO_STORAGE">VIR_WAR_NO_STORAGE</a> = 48 /* failed to start storage */
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<a name="VIR_ERR_NO_STORAGE_POOL">VIR_ERR_NO_STORAGE_POOL</a> = 49 /* storage pool not found */
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<a name="VIR_ERR_NO_STORAGE_VOL">VIR_ERR_NO_STORAGE_VOL</a> = 50 /* storage pool not found */
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};
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</pre><p/>
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</div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virErrorPtr">Typedef </a>virErrorPtr</h3><pre class="programlisting"><a href="libvirt-virterror.html#virError">virError</a> * virErrorPtr;
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</pre><p/>
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</div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virErrorFunc"/>Function type virErrorFunc</h3><pre class="programlisting">void virErrorFunc (void * userData, <br/> <a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> error)<br/>
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</pre><p>Signature of a function to use when there is an error raised by the library.</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>userData</tt></i>:</span></td><td>user provided data for the error callback</td></tr><tr><td><span class="term"><i><tt>error</tt></i>:</span></td><td>the error being raised.</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virConnCopyLastError"/>virConnCopyLastError ()</h3><pre class="programlisting">int virConnCopyLastError (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> <a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> to)<br/>
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</pre><p>Copy the content of the last error caught on that connection One will need to free the result with virResetError()</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>to</tt></i>:</span></td><td>target to receive the copy</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if no error was found and the error code otherwise and -1 in case of parameter error.</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virConnGetLastError"/>virConnGetLastError ()</h3><pre class="programlisting"><a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> virConnGetLastError (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
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</pre><p>Provide a pointer to the last error caught on that connection Simpler but may not be suitable for multithreaded accesses, in which case use virConnCopyLastError()</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the last error or NULL if none occurred.</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virConnResetLastError"/>virConnResetLastError ()</h3><pre class="programlisting">void virConnResetLastError (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn)<br/>
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</pre><p>Reset the last error caught on that connection</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virConnSetErrorFunc"/>virConnSetErrorFunc ()</h3><pre class="programlisting">void virConnSetErrorFunc (<a href="libvirt-libvirt.html#virConnectPtr">virConnectPtr</a> conn, <br/> void * userData, <br/> <a href="libvirt-virterror.html#virErrorFunc">virErrorFunc</a> handler)<br/>
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</pre><p>Set a connection error handling function, if @handler is NULL it will reset to default which is to pass error back to the global library handler.</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>conn</tt></i>:</span></td><td>pointer to the hypervisor connection</td></tr><tr><td><span class="term"><i><tt>userData</tt></i>:</span></td><td>pointer to the user data provided in the handler callback</td></tr><tr><td><span class="term"><i><tt>handler</tt></i>:</span></td><td>the function to get called in case of error or NULL</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virCopyLastError"/>virCopyLastError ()</h3><pre class="programlisting">int virCopyLastError (<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> to)<br/>
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</pre><p>Copy the content of the last error caught at the library level One will need to free the result with virResetError()</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>to</tt></i>:</span></td><td>target to receive the copy</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>0 if no error was found and the error code otherwise and -1 in case of parameter error.</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virDefaultErrorFunc"/>virDefaultErrorFunc ()</h3><pre class="programlisting">void virDefaultErrorFunc (<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> err)<br/>
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</pre><p>Default routine reporting an error to stderr.</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>err</tt></i>:</span></td><td>pointer to the error.</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virGetLastError"/>virGetLastError ()</h3><pre class="programlisting"><a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> virGetLastError (void)<br/>
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</pre><p>Provide a pointer to the last error caught at the library level Simpler but may not be suitable for multithreaded accesses, in which case use virCopyLastError()</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>a pointer to the last error or NULL if none occurred.</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virResetError"/>virResetError ()</h3><pre class="programlisting">void virResetError (<a href="libvirt-virterror.html#virErrorPtr">virErrorPtr</a> err)<br/>
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</pre><p>Reset the error being pointed to</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>err</tt></i>:</span></td><td>pointer to the <a href="libvirt-virterror.html#virError">virError</a> to clean up</td></tr></tbody></table></div></div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virResetLastError"/>virResetLastError ()</h3><pre class="programlisting">void virResetLastError (void)<br/>
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</pre><p>Reset the last error caught at the library level.</p>
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</div>
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<hr/>
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<div class="refsect2" lang="en"><h3><a name="virSetErrorFunc"/>virSetErrorFunc ()</h3><pre class="programlisting">void virSetErrorFunc (void * userData, <br/> <a href="libvirt-virterror.html#virErrorFunc">virErrorFunc</a> handler)<br/>
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</pre><p>Set a library global error handling function, if @handler is NULL, it will reset to default printing on stderr. The error raised there are those for which no handler at the connection level could caught.</p>
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<div class="variablelist"><table border="0"><col align="left"/><tbody><tr><td><span class="term"><i><tt>userData</tt></i>:</span></td><td>pointer to the user data provided in the handler callback</td></tr><tr><td><span class="term"><i><tt>handler</tt></i>:</span></td><td>the function to get called in case of error or NULL</td></tr></tbody></table></div></div>
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