qemu-config: qemu_read_config_file() reads the normal config file

Introduce a new function qemu_read_config_file which reads the VM configuration
from a config file. Unlike qemu_config_parse it doesn't take a open file but a
filename and reduces code duplication as a side effect.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 11 insertions, 24 deletions

diff --git a/vl.c b/vl.c
index e58441b8a1..fe2dd6fa91 100644
--- a/vl.c
+++ b/vl.c
@@ -2653,25 +2653,16 @@ int main(int argc, char **argv, char **envp)
     }
 
     if (defconfig) {
-        const char *fname;
-        FILE *fp;
+        int ret;
 
-        fname = CONFIG_QEMU_CONFDIR "/qemu.conf";
-        fp = fopen(fname, "r");
-        if (fp) {
-            if (qemu_config_parse(fp, fname) != 0) {
-                exit(1);
-            }
-            fclose(fp);
+        ret = qemu_read_config_file(CONFIG_QEMU_CONFDIR "/qemu.conf");
+        if (ret == -EINVAL) {
+            exit(1);
         }
 
-        fname = arch_config_name;
-        fp = fopen(fname, "r");
-        if (fp) {
-            if (qemu_config_parse(fp, fname) != 0) {
-                exit(1);
-            }
-            fclose(fp);
+        ret = qemu_read_config_file(arch_config_name);
+        if (ret == -EINVAL) {
+            exit(1);
         }
     }
     cpudef_init();
@@ -3327,16 +3318,12 @@ int main(int argc, char **argv, char **envp)
                 break;
             case QEMU_OPTION_readconfig:
                 {
-                    FILE *fp;
-                    fp = fopen(optarg, "r");
-                    if (fp == NULL) {
-                        fprintf(stderr, "open %s: %s\n", optarg, strerror(errno));
+                    int ret = qemu_read_config_file(optarg);
+                    if (ret < 0) {
+                        fprintf(stderr, "read config %s: %s\n", optarg,
+                            strerror(-ret));
                         exit(1);
                     }
-                    if (qemu_config_parse(fp, optarg) != 0) {
-                        exit(1);
-                    }
-                    fclose(fp);
                     break;
                 }
             case QEMU_OPTION_writeconfig: