auc: add '-n' parameter for dry-run

Add option to allow only requesting an image but not actually download
or sysupgrade anything.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 19c135685f7b9eefbf75b5a96b780f4fa2b46f19)

diff --git a/utils/auc/src/auc.c b/utils/auc/src/auc.c
index e732823e5b6ac6dd68c791bcfae41fb6a9c0cd79..e993a93916d14b8b00ccbf7facbd4ea5cef5b1f2 100644 (file)
--- a/utils/auc/src/auc.c
+++ b/utils/auc/src/auc.c
@@ -1430,6 +1430,7 @@ static void usage(const char *arg0)
 #endif
        fprintf(stdout, " -f\t\tuse force\n");
        fprintf(stdout, " -h\t\toutput help\n");
+       fprintf(stdout, " -n\t\tdry-run (don't download or upgrade)\n");
        fprintf(stdout, " -r\t\tcheck only for release upgrades\n");
        fprintf(stdout, " -F <fstype>\toverride filesystem type\n");
        fprintf(stdout, " -y\t\tdon't wait for user confirmation\n");
@@ -1451,9 +1452,10 @@ int main(int args, char *argv[]) {
        struct blob_attr *tbr[__REPLY_MAX];
        struct blob_attr *tb[__TARGET_MAX] = {}; /* make sure tb is NULL initialized even if blobmsg_parse isn't called */
        struct stat imgstat;
-       int check_only = 0;
-       int retry_delay = 0;
-       int upg_check = 0;
+       bool check_only = false;
+       bool retry_delay = false;
+       bool upg_check = false;
+       bool dry_run = false;
        int revcmp;
        int addargs;
        unsigned char argc = 1;
@@ -1485,7 +1487,7 @@ int main(int args, char *argv[]) {
                }
 
                if (!strncmp(argv[argc], "-c", 3))
-                       check_only = 1;
+                       check_only = true;
 
                if (!strncmp(argv[argc], "-f", 3))
                        force = true;
@@ -1495,6 +1497,9 @@ int main(int args, char *argv[]) {
                        addargs = 1;
                }
 
+               if (!strncmp(argv[argc], "-n", 3))
+                       dry_run = true;
+
                if (!strncmp(argv[argc], "-r", 3))
                        release_only = true;
 
@@ -1686,7 +1691,6 @@ int main(int args, char *argv[]) {
                        }
                        use_get = true;
                } else if (retry_delay) {
-                       fputc('\n', stderr);
                        retry_delay = 0;
                }
 
@@ -1720,7 +1724,13 @@ int main(int args, char *argv[]) {
                 blobmsg_get_string(tb[TARGET_BINDIR]),
                 image_name);
 
-       fprintf(stderr, "Downloading image from %s\n", url);
+       if (dry_run) {
+               fprintf(stderr, "\nImage available at %s\n", url);
+               rc = 0;
+               goto freebranches;
+       }
+
+       fprintf(stderr, "\nDownloading image from %s\n", url);
        rc = server_request(url, NULL, NULL);
        if (rc)
                goto freebranches;
@@ -1792,7 +1802,6 @@ freebranches:
                fputc('\n', stderr);
        }
 
-       /* ToDo */
 freeboard:
        if (rootfs_type)
                free(rootfs_type);