image_info(): Fix minor bugs

diff --git a/programs/imagex.c b/programs/imagex.c
index f7d8b66558389d97e16b7b16086588d1ebf37a34..90eac384f1eed5aedc07f6b407805e09ffdb856c 100644 (file)
--- a/programs/imagex.c
+++ b/programs/imagex.c
@@ -1100,6 +1100,7 @@ static int imagex_info(int argc, const char **argv)
        int open_flags = WIMLIB_OPEN_FLAG_SPLIT_OK;
        int part_number;
        int total_parts;
+       int num_images;
 
        for_opt(c, info_options) {
                switch (c) {
@@ -1165,7 +1166,7 @@ static int imagex_info(int argc, const char **argv)
        image = wimlib_resolve_image(w, image_num_or_name);
        if (image == WIMLIB_NO_IMAGE && strcmp(image_num_or_name, "0") != 0) {
                imagex_error("The image `%s' does not exist",
-                                               image_num_or_name);
+                            image_num_or_name);
                if (boot)
                        imagex_error("If you would like to set the boot "
                                     "index to 0, specify image \"0\" with "
@@ -1174,7 +1175,18 @@ static int imagex_info(int argc, const char **argv)
                goto out;
        }
 
-       if (image == WIMLIB_ALL_IMAGES && wimlib_get_num_images(w) > 1) {
+       num_images = wimlib_get_num_images(w);
+
+       if (num_images == 0) {
+               if (boot) {
+                       imagex_error("--boot is meaningless on a WIM with no "
+                                    "images");
+                       ret = WIMLIB_ERR_INVALID_IMAGE;
+                       goto out;
+               }
+       }
+
+       if (image == WIMLIB_ALL_IMAGES && num_images > 1) {
                if (boot) {
                        imagex_error("Cannot specify the --boot flag "
                                     "without specifying a specific "
@@ -1232,13 +1244,14 @@ static int imagex_info(int argc, const char **argv)
                                                        "file `%s' for "
                                                        "writing ",
                                                        xml_out_file);
+                               ret = -1;
                                goto out;
                        }
                        ret = wimlib_extract_xml_data(w, fp);
                        if (fclose(fp) != 0) {
                                imagex_error("Failed to close the file `%s'",
                                             xml_out_file);
-                               goto out;
+                               ret = -1;
                        }
 
                        if (ret != 0)
@@ -1258,7 +1271,8 @@ static int imagex_info(int argc, const char **argv)
                /* Modification operations */
                if (total_parts != 1) {
                        imagex_error("Modifying a split WIM is not supported.");
-                       return -1;
+                       ret = -1;
+                       goto out;
                }
                if (image == WIMLIB_ALL_IMAGES)
                        image = 1;
@@ -1266,7 +1280,8 @@ static int imagex_info(int argc, const char **argv)
                if (image == WIMLIB_NO_IMAGE && new_name) {
                        imagex_error("Cannot specify new_name (`%s') when "
                                     "using image 0", new_name);
-                       return -1;
+                       ret = -1;
+                       goto out;
                }
 
                if (boot) {
@@ -1314,18 +1329,18 @@ static int imagex_info(int argc, const char **argv)
                /* Only call wimlib_overwrite() if something actually needs to
                 * be changed. */
                if (boot || new_name || new_desc ||
-                               check != wimlib_has_integrity_table(w)) {
+                   (check && !wimlib_has_integrity_table(w)))
+               {
+                       int write_flags;
 
                        ret = file_writable(wimfile);
                        if (ret != 0)
                                return ret;
 
-                       int write_flags;
-                       if (check) {
+                       if (check)
                                write_flags = WIMLIB_WRITE_FLAG_CHECK_INTEGRITY;
-                       } else {
+                       else
                                write_flags = 0;
-                       }
 
                        ret = wimlib_overwrite(w, write_flags, 1,
                                               imagex_progress_func);
@@ -1333,7 +1348,7 @@ static int imagex_info(int argc, const char **argv)
                                ret = 0;
                } else {
                        printf("The file `%s' was not modified because nothing "
-                                       "needed to be done.\n", wimfile);
+                              "needed to be done.\n", wimfile);
                        ret = 0;
                }
        }