Export virPipeReadUntilEOF internally

used to read the data from virExec stdout/err file descriptors

* src/util/util.c src/util/util.h: not static anymore and export it
* src/libvirt_private.syms: allow access internally

src/libvirt_private.syms

@@ -633,6 +633,7 @@ virFilePid;
 virFileReadPid;
 virFileLinkPointsTo;
 virParseNumber;
+virPipeReadUntilEOF;
 virAsprintf;
 virRun;
 virSkipSpaces;

src/util/util.c

@@ -786,7 +786,7 @@ int virExecDaemonize(const char *const*argv,
     return ret;
 }
 
-static int
+int
 virPipeReadUntilEOF(int outfd, int errfd,
                     char **outbuf, char **errbuf) {
 

src/util/util.h

@@ -81,6 +81,8 @@ int virRun(const char *const*argv, int *status) ATTRIBUTE_RETURN_CHECK;
 int virRunWithHook(const char *const*argv,
                    virExecHook hook, void *data,
                    int *status) ATTRIBUTE_RETURN_CHECK;
+int virPipeReadUntilEOF(int outfd, int errfd,
+                        char **outbuf, char **errbuf);
 int virFork(pid_t *pid);
 
 int virFileReadLimFD(int fd, int maxlen, char **buf) ATTRIBUTE_RETURN_CHECK;