Stop free'ing 'const char *' strings

The VIR_FREE() macro will cast away any const-ness. This masked a
number of places where we passed a 'const char *' string to
VIR_FREE. Fortunately in all of these cases, the variable was not
in fact const data, but a heap allocated string. Fix all the
variable declarations to reflect this.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/conf/domain_conf.c

@@ -6777,9 +6777,9 @@ virDomainChrDefParseTargetXML(virDomainChrDefPtr def,
 {
     int ret = -1;
     unsigned int port;
-    const char *targetType = virXMLPropString(cur, "type");
-    const char *addrStr = NULL;
-    const char *portStr = NULL;
+    char *targetType = virXMLPropString(cur, "type");
+    char *addrStr = NULL;
+    char *portStr = NULL;
 
     if ((def->targetType =
          virDomainChrTargetTypeFromString(def, def->deviceType,
@@ -8193,7 +8193,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
         while (cur != NULL) {
             if (cur->type == XML_ELEMENT_NODE) {
                 if (xmlStrEqual(cur->name, BAD_CAST "channel")) {
-                    const char *name, *mode;
+                    char *name, *mode;
                     int nameval, modeval;
                     name = virXMLPropString(cur, "name");
                     mode = virXMLPropString(cur, "mode");
@@ -8227,7 +8227,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
 
                     def->data.spice.channels[nameval] = modeval;
                 } else if (xmlStrEqual(cur->name, BAD_CAST "image")) {
-                    const char *compression = virXMLPropString(cur, "compression");
+                    char *compression = virXMLPropString(cur, "compression");
                     int compressionVal;
 
                     if (!compression) {
@@ -8248,7 +8248,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
 
                     def->data.spice.image = compressionVal;
                 } else if (xmlStrEqual(cur->name, BAD_CAST "jpeg")) {
-                    const char *compression = virXMLPropString(cur, "compression");
+                    char *compression = virXMLPropString(cur, "compression");
                     int compressionVal;
 
                     if (!compression) {
@@ -8269,7 +8269,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
 
                     def->data.spice.jpeg = compressionVal;
                 } else if (xmlStrEqual(cur->name, BAD_CAST "zlib")) {
-                    const char *compression = virXMLPropString(cur, "compression");
+                    char *compression = virXMLPropString(cur, "compression");
                     int compressionVal;
 
                     if (!compression) {
@@ -8290,7 +8290,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
 
                     def->data.spice.zlib = compressionVal;
                 } else if (xmlStrEqual(cur->name, BAD_CAST "playback")) {
-                    const char *compression = virXMLPropString(cur, "compression");
+                    char *compression = virXMLPropString(cur, "compression");
                     int compressionVal;
 
                     if (!compression) {
@@ -8311,7 +8311,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
 
                     def->data.spice.playback = compressionVal;
                 } else if (xmlStrEqual(cur->name, BAD_CAST "streaming")) {
-                    const char *mode = virXMLPropString(cur, "mode");
+                    char *mode = virXMLPropString(cur, "mode");
                     int modeVal;
 
                     if (!mode) {
@@ -8331,7 +8331,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
 
                     def->data.spice.streaming = modeVal;
                 } else if (xmlStrEqual(cur->name, BAD_CAST "clipboard")) {
-                    const char *copypaste = virXMLPropString(cur, "copypaste");
+                    char *copypaste = virXMLPropString(cur, "copypaste");
                     int copypasteVal;
 
                     if (!copypaste) {
@@ -8351,7 +8351,7 @@ virDomainGraphicsDefParseXML(xmlNodePtr node,
 
                     def->data.spice.copypaste = copypasteVal;
                 } else if (xmlStrEqual(cur->name, BAD_CAST "mouse")) {
-                    const char *mode = virXMLPropString(cur, "mode");
+                    char *mode = virXMLPropString(cur, "mode");
                     int modeVal;
 
                     if (!mode) {
@@ -8543,9 +8543,9 @@ virDomainRNGDefParseXML(const xmlNodePtr node,
                         xmlXPathContextPtr ctxt,
                         unsigned int flags)
 {
-    const char *model = NULL;
-    const char *backend = NULL;
-    const char *type = NULL;
+    char *model = NULL;
+    char *backend = NULL;
+    char *type = NULL;
     virDomainRNGDefPtr def;
     xmlNodePtr save = ctxt->node;
     xmlNodePtr *backends = NULL;
@@ -15220,7 +15220,7 @@ virDomainChrDefFormat(virBufferPtr buf,
                 return -1;
             }
 
-            const char *addr = virSocketAddrFormat(def->target.addr);
+            char *addr = virSocketAddrFormat(def->target.addr);
             if (addr == NULL)
                 return -1;
 

src/conf/netdev_vlan_conf.c

@@ -36,8 +36,8 @@ virNetDevVlanParse(xmlNodePtr node, xmlXPathContextPtr ctxt, virNetDevVlanPtr de
 {
     int ret = -1;
     xmlNodePtr save = ctxt->node;
-    const char *trunk = NULL;
-    const char *nativeMode = NULL;
+    char *trunk = NULL;
+    char *nativeMode = NULL;
     xmlNodePtr *tagNodes = NULL;
     int nTags;
     size_t i;

src/conf/nwfilter_conf.c

@@ -2432,7 +2432,8 @@ static const char *
 virNWFilterIsAllowedChain(const char *chainname)
 {
     enum virNWFilterChainSuffixType i;
-    const char *name, *msg;
+    const char *name;
+    char *msg;
     virBuffer buf = VIR_BUFFER_INITIALIZER;
     bool printed = false;
 

src/node_device/node_device_udev.c

@@ -367,7 +367,7 @@ udevLogFunction(struct udev *udev ATTRIBUTE_UNUSED,
                 va_list args)
 {
     virBuffer buf = VIR_BUFFER_INITIALIZER;
-    const char *format = NULL;
+    char *format = NULL;
 
     virBufferAdd(&buf, fmt, -1);
     virBufferTrim(&buf, "\n", -1);

src/nwfilter/nwfilter_gentech_driver.c

@@ -499,7 +499,7 @@ virNWFilterDetermineMissingVarsRec(virNWFilterDefPtr filter,
             for (j = 0; j < rule->nVarAccess; j++) {
                 if (!virNWFilterVarAccessIsAvailable(rule->varAccess[j],
                                                      vars)) {
-                    const char *varAccess;
+                    char *varAccess;
                     virBuffer buf = VIR_BUFFER_INITIALIZER;
 
                     virNWFilterVarAccessPrint(rule->varAccess[j], &buf);

src/qemu/qemu_command.c

@@ -6147,7 +6147,8 @@ static char *qemuBuildTPMBackendStr(const virDomainDefPtr def,
     const virDomainTPMDefPtr tpm = def->tpm;
     virBuffer buf = VIR_BUFFER_INITIALIZER;
     const char *type = virDomainTPMBackendTypeToString(tpm->type);
-    const char *cancel_path, *tpmdev;
+    char *cancel_path;
+    const char *tpmdev;
 
     virBufferAsprintf(&buf, "%s,id=tpm-%s", type, tpm->info.alias);
 
@@ -7772,7 +7773,7 @@ qemuBuildCommandLine(virConnectPtr conn,
     }
 
     if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_RTC)) {
-        const char *rtcopt;
+        char *rtcopt;
         virCommandAddArg(cmd, "-rtc");
         if (!(rtcopt = qemuBuildClockArgStr(&def->clock)))
             goto error;

src/qemu/qemu_domain.c

@@ -1383,7 +1383,7 @@ qemuDomainDefCopy(virQEMUDriverPtr driver,
     virBuffer buf = VIR_BUFFER_INITIALIZER;
     virDomainDefPtr ret = NULL;
     virCapsPtr caps = NULL;
-    const char *xml = NULL;
+    char *xml = NULL;
 
     if (qemuDomainDefFormatBuf(driver, src, flags, &buf) < 0)
         goto cleanup;

src/qemu/qemu_driver.c

@@ -14658,7 +14658,7 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
     virDomainDefPtr persistentDef = NULL;
     virDomainBlockIoTuneInfo info;
     virDomainBlockIoTuneInfo *oldinfo;
-    const char *device = NULL;
+    char *device = NULL;
     int ret = -1;
     size_t i;
     int idx = -1;
@@ -14836,7 +14836,7 @@ qemuDomainGetBlockIoTune(virDomainPtr dom,
     qemuDomainObjPrivatePtr priv;
     virDomainDefPtr persistentDef = NULL;
     virDomainBlockIoTuneInfo reply;
-    const char *device = NULL;
+    char *device = NULL;
     int ret = -1;
     size_t i;
     virCapsPtr caps = NULL;

src/rpc/virnetsshsession.c

@@ -268,8 +268,9 @@ virNetSSHKbIntCb(const char *name ATTRIBUTE_UNUSED,
 cleanup:
     if (askcred) {
         for (i = 0; i < num_prompts; i++) {
+            char *prompt = (char *)askcred[i].prompt;
             VIR_FREE(askcred[i].result);
-            VIR_FREE(askcred[i].prompt);
+            VIR_FREE(prompt);
         }
     }
 
@@ -291,6 +292,8 @@ virNetSSHCheckHostKey(virNetSSHSessionPtr sess)
     int ret;
     const char *key;
     const char *keyhash;
+    char *keyhashstr;
+    char *tmp;
     int keyType;
     size_t keyLength;
     char *errmsg;
@@ -364,7 +367,7 @@ virNetSSHCheckHostKey(virNetSSHSessionPtr sess)
              * Sadly, there's no constant to describe the hash length, so
              * we have to use a *MAGIC* constant. */
             for (i = 0; i < 16; i++)
-                    virBufferAsprintf(&buff, "%02hhX:", keyhash[i]);
+                virBufferAsprintf(&buff, "%02hhX:", keyhash[i]);
             virBufferTrim(&buff, ":", 1);
 
             if (virBufferError(&buff) != 0) {
@@ -372,16 +375,16 @@ virNetSSHCheckHostKey(virNetSSHSessionPtr sess)
                 return -1;
             }
 
-            keyhash = virBufferContentAndReset(&buff);
+            keyhashstr = virBufferContentAndReset(&buff);
 
             askKey.type = VIR_CRED_ECHOPROMPT;
             if (virAsprintf((char **)&askKey.prompt,
                             _("Accept SSH host key with hash '%s' for "
                               "host '%s:%d' (%s/%s)?"),
-                            keyhash,
+                            keyhashstr,
                             sess->hostname, sess->port,
                             "y", "n") < 0) {
-                VIR_FREE(keyhash);
+                VIR_FREE(keyhashstr);
                 return -1;
             }
 
@@ -389,23 +392,25 @@ virNetSSHCheckHostKey(virNetSSHSessionPtr sess)
                 virReportError(VIR_ERR_SSH, "%s",
                                _("failed to retrieve decision to accept "
                                  "host key"));
-                VIR_FREE(askKey.prompt);
-                VIR_FREE(keyhash);
+                tmp = (char*)askKey.prompt;
+                VIR_FREE(tmp);
+                VIR_FREE(keyhashstr);
                 return -1;
             }
 
-            VIR_FREE(askKey.prompt);
+            tmp = (char*)askKey.prompt;
+            VIR_FREE(tmp);
 
             if (!askKey.result ||
                 STRCASENEQ(askKey.result, "y")) {
                 virReportError(VIR_ERR_SSH,
                                _("SSH host key for '%s' (%s) was not accepted"),
-                               sess->hostname, keyhash);
-                VIR_FREE(keyhash);
+                               sess->hostname, keyhashstr);
+                VIR_FREE(keyhashstr);
                 VIR_FREE(askKey.result);
                 return -1;
             }
-            VIR_FREE(keyhash);
+            VIR_FREE(keyhashstr);
             VIR_FREE(askKey.result);
         }
 
@@ -590,6 +595,7 @@ virNetSSHAuthenticatePrivkey(virNetSSHSessionPtr sess,
     size_t i;
     char *errmsg;
     int ret;
+    char *tmp;
 
     /* try open the key with no password */
     if ((ret = libssh2_userauth_publickey_fromfile(sess->session,
@@ -644,11 +650,13 @@ virNetSSHAuthenticatePrivkey(virNetSSHSessionPtr sess,
         virReportError(VIR_ERR_SSH, "%s",
                        _("failed to retrieve private key passphrase: "
                          "callback has failed"));
-        VIR_FREE(retr_passphrase.prompt);
+        tmp = (char *)retr_passphrase.prompt;
+        VIR_FREE(tmp);
         return -1;
     }
 
-    VIR_FREE(retr_passphrase.prompt);
+    tmp = (char *)retr_passphrase.prompt;
+    VIR_FREE(tmp);
 
     ret = libssh2_userauth_publickey_fromfile(sess->session,
                                               priv->username,

src/storage/storage_backend.c

@@ -931,7 +931,7 @@ virStorageBackendCreateQemuImg(virConnectPtr conn,
                                unsigned int flags)
 {
     int ret = -1;
-    const char *create_tool;
+    char *create_tool;
     int imgformat;
     virCommandPtr cmd;
 

src/storage/storage_driver.c

@@ -1450,7 +1450,7 @@ storageVolLookupByPath(virConnectPtr conn,
         virStoragePoolObjLock(driver->pools.objs[i]);
         if (virStoragePoolObjIsActive(driver->pools.objs[i])) {
             virStorageVolDefPtr vol;
-            const char *stable_path;
+            char *stable_path;
 
             stable_path = virStorageBackendStablePath(driver->pools.objs[i],
                                                       cleanpath,

src/util/vircommand.c

@@ -405,6 +405,7 @@ virExec(virCommandPtr cmd)
     int childout = -1;
     int childerr = -1;
     int tmpfd;
+    char *binarystr = NULL;
     const char *binary = NULL;
     int forkRet, ret;
     struct sigaction waxon, waxoff;
@@ -412,7 +413,7 @@ virExec(virCommandPtr cmd)
     int ngroups;
 
     if (cmd->args[0][0] != '/') {
-        if (!(binary = virFindFileInPath(cmd->args[0]))) {
+        if (!(binary = binarystr = virFindFileInPath(cmd->args[0]))) {
             virReportSystemError(ENOENT,
                                  _("Cannot find '%s' in path"),
                                  cmd->args[0]);
@@ -506,8 +507,7 @@ virExec(virCommandPtr cmd)
 
         cmd->pid = pid;
 
-        if (binary != cmd->args[0])
-            VIR_FREE(binary);
+        VIR_FREE(binarystr);
         VIR_FREE(groups);
 
         return 0;
@@ -713,8 +713,7 @@ virExec(virCommandPtr cmd)
        should never jump here on error */
 
     VIR_FREE(groups);
-    if (binary != cmd->args[0])
-        VIR_FREE(binary);
+    VIR_FREE(binarystr);
 
     /* NB we don't virReportError() on any failures here
        because the code which jumped here already raised

src/util/virlog.c

@@ -94,7 +94,7 @@ static regex_t *virLogRegex = NULL;
  * based on a matching pattern (currently a substring)
  */
 struct _virLogFilter {
-    const char *match;
+    char *match;
     virLogPriority priority;
     unsigned int flags;
 };
@@ -115,7 +115,7 @@ struct _virLogOutput {
     virLogCloseFunc c;
     virLogPriority priority;
     virLogDestination dest;
-    const char *name;
+    char *name;
 };
 typedef struct _virLogOutput virLogOutput;
 typedef virLogOutput *virLogOutputPtr;

tools/virsh-domain.c

@@ -2346,8 +2346,8 @@ cmdDomIfSetLink(vshControl *ctl, const vshCmd *cmd)
     virDomainPtr dom;
     const char *iface;
     const char *state;
-    const char *value;
-    const char *desc;
+    char *value;
+    char *desc;
     virMacAddr macaddr;
     const char *element;
     const char *attr;
@@ -6186,7 +6186,7 @@ cmdCPUBaseline(vshControl *ctl, const vshCmd *cmd)
     bool ret = false;
     char *buffer;
     char *result = NULL;
-    const char **list = NULL;
+    char **list = NULL;
     unsigned int flags = 0;
     int count = 0;
 
@@ -6243,7 +6243,8 @@ cmdCPUBaseline(vshControl *ctl, const vshCmd *cmd)
         list[i] = vshStrdup(ctl, (const char *)xmlBufferContent(xml_buf));
     }
 
-    result = virConnectBaselineCPU(ctl->conn, list, count, flags);
+    result = virConnectBaselineCPU(ctl->conn,
+                                   (const char **)list, count, flags);
 
     if (result) {
         vshPrint(ctl, "%s", result);
@@ -6398,7 +6399,7 @@ cmdCPUStats(vshControl *ctl, const vshCmd *cmd)
                              params[pos].value.ul / 1000000000,
                              params[pos].value.ul % 1000000000);
                 } else {
-                    const char *s = vshGetTypedParamValue(ctl, &params[pos]);
+                    char *s = vshGetTypedParamValue(ctl, &params[pos]);
                     vshPrint(ctl, _("%s\n"), s);
                     VIR_FREE(s);
                 }
@@ -9874,8 +9875,8 @@ vshPrepareDiskXML(xmlNodePtr disk_node,
 {
     xmlNodePtr cur = NULL;
     xmlBufferPtr xml_buf = NULL;
-    const char *disk_type = NULL;
-    const char *device_type = NULL;
+    char *disk_type = NULL;
+    char *device_type = NULL;
     xmlNodePtr new_node = NULL;
     char *ret = NULL;
 
@@ -10211,9 +10212,9 @@ cmdChangeMedia(vshControl *ctl, const vshCmd *cmd)
     virDomainPtr dom = NULL;
     const char *source = NULL;
     const char *path = NULL;
-    const char *doc = NULL;
+    char *doc = NULL;
     xmlNodePtr disk_node = NULL;
-    const char *disk_xml = NULL;
+    char *disk_xml = NULL;
     bool ret = false;
     int prepare_type = 0;
     const char *action = NULL;