From 48896281bebc5c69760f4e47625e4db81e3a9004 Mon Sep 17 00:00:00 2001
From: Wolfgang Bumiller <w.bumiller@proxmox.com>
Date: Wed, 9 Dec 2015 14:46:49 +0100
Subject: [PATCH 13/47] vma: add 'config' command to dump the config

---
 vma.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/vma.c b/vma.c
index d55874a..79bdd00 100644
--- a/vma.c
+++ b/vma.c
@@ -26,6 +26,7 @@ static void help(void)
         "usage: vma command [command options]\n"
         "\n"
         "vma list <filename>\n"
+        "vma config <filename> [-c config]\n"
         "vma create <filename> [-c config] <archive> pathname ...\n"
         "vma extract <filename> [-r <fifo>] <targetdir>\n"
         "vma verify <filename> [-v]\n"
@@ -604,6 +605,67 @@ static int create_archive(int argc, char **argv)
     return 0;
 }
 
+static int dump_config(int argc, char **argv)
+{
+    int c, ret = 0;
+    const char *filename;
+    const char *config_name = "qemu-server.conf";
+
+    for (;;) {
+        c = getopt(argc, argv, "hc:");
+        if (c == -1) {
+            break;
+        }
+        switch (c) {
+        case '?':
+        case 'h':
+            help();
+            break;
+        case 'c':
+            config_name = optarg;
+            break;
+        default:
+            help();
+        }
+    }
+
+    /* Get the filename */
+    if ((optind + 1) != argc) {
+        help();
+    }
+    filename = argv[optind++];
+
+    Error *errp = NULL;
+    VmaReader *vmar = vma_reader_create(filename, &errp);
+
+    if (!vmar) {
+        g_error("%s", error_get_pretty(errp));
+    }
+
+    int found = 0;
+    GList *l = vma_reader_get_config_data(vmar);
+    while (l && l->data) {
+        VmaConfigData *cdata = (VmaConfigData *)l->data;
+        l = g_list_next(l);
+        if (strcmp(cdata->name, config_name) == 0) {
+            found = 1;
+            fwrite(cdata->data,  cdata->len, 1, stdout);
+            break;
+        }
+    }
+
+    vma_reader_destroy(vmar);
+
+    bdrv_close_all();
+
+    if (!found) {
+        fprintf(stderr, "unable to find configuration data '%s'\n", config_name);
+        return -1;
+    }
+
+    return ret;
+}
+
 int main(int argc, char **argv)
 {
     const char *cmdname;
@@ -633,6 +695,8 @@ int main(int argc, char **argv)
         return extract_content(argc, argv);
     } else if (!strcmp(cmdname, "verify")) {
         return verify_content(argc, argv);
+    } else if (!strcmp(cmdname, "config")) {
+        return dump_config(argc, argv);
     }
 
     help();
-- 
2.1.4