qemu-io: Factor out qemuio_command

It's duplicated code. Move it to qemu-io-cmds.c because it's not
dependent on any static data of the qemu-io tool.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

cmd.c

@@ -138,28 +138,11 @@ static char *get_prompt(void);
 
 void command_loop(void)
 {
-    int c, i, done = 0, fetchable = 0, prompted = 0;
+    int i, done = 0, fetchable = 0, prompted = 0;
     char *input;
-    char **v;
-    const cmdinfo_t *ct;
 
     for (i = 0; !done && i < ncmdline; i++) {
-        input = strdup(cmdline[i]);
-        if (!input) {
-            fprintf(stderr, _("cannot strdup command '%s': %s\n"),
-                    cmdline[i], strerror(errno));
-            exit(1);
-        }
-        v = breakline(input, &c);
-        if (c) {
-            ct = find_command(v[0]);
-            if (ct) {
-                done = command(ct, c, v);
-            } else {
-                fprintf(stderr, _("command \"%s\" not found\n"), v[0]);
-            }
-	}
-        doneline(input, v);
+        done = qemuio_command(cmdline[i]);
     }
     if (cmdline) {
         g_free(cmdline);
@@ -179,20 +162,13 @@ void command_loop(void)
         if (!fetchable) {
             continue;
         }
+
         input = fetchline();
         if (input == NULL) {
             break;
         }
-        v = breakline(input, &c);
-        if (c) {
-            ct = find_command(v[0]);
-            if (ct) {
-                done = command(ct, c, v);
-            } else {
-                fprintf(stderr, _("command \"%s\" not found\n"), v[0]);
-            }
-        }
-        doneline(input, v);
+        done = qemuio_command(input);
+        free(input);
 
         prompted = 0;
         fetchable = 0;
@@ -328,15 +304,6 @@ char **breakline(char *input, int *count)
     return rval;
 }
 
-void
-doneline(
-	char	*input,
-	char	**vec)
-{
-	free(input);
-	free(vec);
-}
-
 #define EXABYTES(x)	((long long)(x) << 60)
 #define PETABYTES(x)	((long long)(x) << 50)
 #define TERABYTES(x)	((long long)(x) << 40)

cmd.h

@@ -59,7 +59,6 @@ int command(const cmdinfo_t *ci, int argc, char **argv);
 
 /* from input.h */
 char **breakline(char *input, int *count);
-void doneline(char *input, char **vec);
 char *fetchline(void);
 
 void cvtstr(double value, char *str, size_t sz);
@@ -77,4 +76,6 @@ void timestr(struct timeval *tv, char *str, size_t sz, int flags);
 
 extern char *progname;
 
+bool qemuio_command(const char *cmd);
+
 #endif	/* __COMMAND_H__ */

qemu-io-cmds.c

@@ -1807,6 +1807,30 @@ static int init_check_command(BlockDriverState *bs, const cmdinfo_t *ct)
     return 1;
 }
 
+bool qemuio_command(const char *cmd)
+{
+    char *input;
+    const cmdinfo_t *ct;
+    char **v;
+    int c;
+    bool done = false;
+
+    input = g_strdup(cmd);
+    v = breakline(input, &c);
+    if (c) {
+        ct = find_command(v[0]);
+        if (ct) {
+            done = command(ct, c, v);
+        } else {
+            fprintf(stderr, "command \"%s\" not found\n", v[0]);
+        }
+    }
+    g_free(input);
+    g_free(v);
+
+    return done;
+}
+
 static void __attribute((constructor)) init_qemuio_commands(void)
 {
     /* initialize commands */