[PATCH 2/9] xl: Improve return and exit codes of restore and save related functions.

[Harmandeep Kaur <write.harmandeep@gmail.com>]

Signed-off-by: Harmandeep Kaur <write.harmandeep@gmail.com>
---
 tools/libxl/xl_cmdimpl.c | 40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 8f5a2f4..e5bb41f 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -2708,11 +2708,11 @@ static uint32_t create_domain(struct domain_create *dom_info)
             restore_fd = open(restore_file, O_RDONLY);
             if (restore_fd == -1) {
                 fprintf(stderr, "Can't open restore file: %s\n", strerror(errno));
-                return ERROR_INVAL;
+                return -1;
             }
             restore_fd_to_close = restore_fd;
             rc = libxl_fd_set_cloexec(ctx, restore_fd, 1);
-            if (rc) return rc;
+            if (rc) return -1;
         }
 
         CHK_ERRNOVAL(libxl_read_exactly(
@@ -2721,11 +2721,11 @@ static uint32_t create_domain(struct domain_create *dom_info)
         if (memcmp(hdr.magic, savefileheader_magic, sizeof(hdr.magic))) {
             fprintf(stderr, "File has wrong magic number -"
                     " corrupt or for a different tool?\n");
-            return ERROR_INVAL;
+            return -1;
         }
         if (hdr.byteorder != SAVEFILE_BYTEORDER_VALUE) {
             fprintf(stderr, "File has wrong byte order\n");
-            return ERROR_INVAL;
+            return -1;
         }
         fprintf(stderr, "Loading new save file %s"
                 " (new xl fmt info"
@@ -2738,7 +2738,7 @@ static uint32_t create_domain(struct domain_create *dom_info)
             fprintf(stderr, "Savefile has mandatory flag(s) 0x%"PRIx32" "
                     "which are not supported; need newer xl\n",
                     badflags);
-            return ERROR_INVAL;
+            return -1;
         }
         if (hdr.optional_data_len) {
             optdata_begin = xmalloc(hdr.optional_data_len);
@@ -2752,7 +2752,7 @@ static uint32_t create_domain(struct domain_create *dom_info)
 #define WITH_OPTDATA(amt, body)                                 \
             if (OPTDATA_LEFT < (amt)) {                         \
                 fprintf(stderr, "Savefile truncated.\n");       \
-                return ERROR_INVAL;                             \
+                return -1;         	                        \
             } else {                                            \
                 body;                                           \
                 optdata_here += (amt);                          \
@@ -2785,12 +2785,12 @@ static uint32_t create_domain(struct domain_create *dom_info)
             ret = libxl_read_file_contents(ctx, config_file,
                                            &config_data, &config_len);
             if (ret) { fprintf(stderr, "Failed to read config file: %s: %s\n",
-                               config_file, strerror(errno)); return ERROR_FAIL; }
+                               config_file, strerror(errno)); return -1; }
         }
         if (!restoring && extra_config && strlen(extra_config)) {
             if (config_len > INT_MAX - (strlen(extra_config) + 2 + 1)) {
                 fprintf(stderr, "Failed to attach extra configuration\n");
-                return ERROR_FAIL;
+                return -1;
             }
             /* allocate space for the extra config plus two EOLs plus \0 */
             config_data = xrealloc(config_data, config_len
@@ -2804,7 +2804,7 @@ static uint32_t create_domain(struct domain_create *dom_info)
         if (!config_data) {
             fprintf(stderr, "Config file not specified and"
                     " none in save file\n");
-            return ERROR_INVAL;
+            return -1;
         }
         config_source = "<saved>";
         config_in_json = !!(hdr.mandatory_flags & XL_MANDATORY_FLAG_JSON);
@@ -2843,7 +2843,7 @@ static uint32_t create_domain(struct domain_create *dom_info)
             if (!json) {
                 fprintf(stderr,
                         "Failed to convert domain configuration to JSON\n");
-                exit(1);
+                exit(EXIT_FAILURE);
             }
             fputs(json, cfg_print_fh);
             free(json);
@@ -2867,7 +2867,7 @@ start:
         ret = freemem(domid, &d_config.b_info);
         if (ret < 0) {
             fprintf(stderr, "failed to free memory for the domain\n");
-            ret = ERROR_FAIL;
+            ret = -1;
             goto error_out;
         }
     }
@@ -3091,9 +3091,9 @@ out:
      * already happened in the parent.
      */
     if ( daemonize && !need_daemon )
-        exit(ret);
+        exit(EXIT_SUCCESS);
 
-    return ret;
+    return ret < 0 ? -1 : 0;
 }
 
 void help(const char *command)
@@ -4122,7 +4122,7 @@ static int save_domain(uint32_t domid, const char *filename, int checkpoint,
     fd = open(filename, O_WRONLY|O_CREAT|O_TRUNC, 0644);
     if (fd < 0) {
         fprintf(stderr, "Failed to open temp file %s for writing\n", filename);
-        exit(2);
+        exit(EXIT_FAILURE);
     }
 
     save_domain_core_writeconfig(fd, filename, config_data, config_len);
@@ -4142,7 +4142,7 @@ static int save_domain(uint32_t domid, const char *filename, int checkpoint,
     else
         libxl_domain_destroy(ctx, domid, 0);
 
-    exit(rc < 0 ? 1 : 0);
+    exit(rc < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
 }
 
 static pid_t create_migration_child(const char *rune, int *send_fd,
@@ -4611,7 +4611,7 @@ int main_restore(int argc, char **argv)
         checkpoint_file = argv[optind + 1];
     } else {
         help("restore");
-        return 2;
+        return EXIT_FAILURE;
     }
 
     memset(&dom_info, 0, sizeof(dom_info));
@@ -4628,9 +4628,9 @@ int main_restore(int argc, char **argv)
 
     rc = create_domain(&dom_info);
     if (rc < 0)
-        return -rc;
+        return EXIT_FAILURE;
 
-    return 0;
+    return EXIT_SUCCESS;
 }
 
 int main_migrate_receive(int argc, char **argv)
@@ -4685,7 +4685,7 @@ int main_save(int argc, char **argv)
 
     if (argc-optind > 3) {
         help("save");
-        return 2;
+        return EXIT_FAILURE;
     }
 
     domid = find_domain(argv[optind]);
@@ -4694,7 +4694,7 @@ int main_save(int argc, char **argv)
         config_filename = argv[optind + 2];
 
     save_domain(domid, filename, checkpoint, leavepaused, config_filename);
-    return 0;
+    return EXIT_SUCCESS;
 }
 
 int main_migrate(int argc, char **argv)
-- 
2.5.0