webui/js: improve save config code

Signed-off-by: KOWX712 <[email protected]>

Author: KOWX712

webui/file.js

@@ -76,15 +76,11 @@ export async function writeConfig() {
                 let command;
                 if (typeof value === 'string') {
                     value = value.replace(/"/g, '\"').replace(/\\/g, '');
-                    command = `sed 's|^${key}=.*|${key}="${value}"|'`;
+                    command = `sed -i 's|^${key}=.*|${key}="${value}"|'`;
                 } else {
-                    command = `sed 's|^${key}=.*|${key}=${value}|'`;
+                    command = `sed -i 's|^${key}=.*|${key}=${value}|'`;
                 }
-                commands.push(command
-                    + ` ${moddir}/webroot/config.sh > ${moddir}/webroot/config.sh.tmp`
-                    + ` && cat ${moddir}/webroot/config.sh.tmp > ${moddir}/webroot/config.sh`
-                    + ` && rm -f ${moddir}/webroot/config.sh.tmp`
-                );
+                commands.push(command + `"$(realpath ${moddir}/webroot/config.sh)"`);
             }
         }
     }