{"record":{"id":"6716d1d2b6f76afd","repo":"MuntashirAkon/AppManager","slug":"error-setting-classpath-n","errorCode":null,"errorMessage":"Error setting CLASSPATH\\n","messagePattern":"Error setting CLASSPATH\\\\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"app/src/main/cpp/run_server.c","lineNumber":199,"sourceCode":"        fprintf(stderr, \"Warning: chown failed: %s\\n\", strerror(errno));\n        // Although it failed, still proceed\n    }\n\n    // Build argument for am.jar\n    char args_buf[2048];\n    if (snprintf(args_buf, sizeof(args_buf), \"path:%s,token:%s,app:%s,bgrun:%s,debug:%s\",\n                 port, token, app_id, bgrun, debug) >= sizeof(args_buf)) {\n        fprintf(stderr, \"Error! Buffer overflow on args_buf.\\n\");\n        unlink(exec_jar_path);\n        return 1;\n    }\n\n    printf(\"Resolved Jar path: %s\\n\", resolved_am_jar_path);\n    printf(\"Args: %s\\n\", args_buf);\n\n    // Execute app_process\n    if (setenv(\"CLASSPATH\", exec_jar_path, 1) != 0) {\n        fprintf(stderr, \"Error setting CLASSPATH\\n\");\n        unlink(exec_jar_path);\n        return 1;\n    }\n\n    int extra_args_count = argc - 8;\n    int exec_argc = 6 + extra_args_count;\n    char **exec_argv = malloc(sizeof(char *) * exec_argc);\n    if (!exec_argv) {\n        fprintf(stderr, \"Out of memory\\n\");\n        unlink(exec_jar_path);\n        return 1;\n    }\n\n    exec_argv[0] = \"app_process\";\n    exec_argv[1] = \"/system/bin\";\n\n    char nice_name_buf[128];\n    snprintf(nice_name_buf, sizeof(nice_name_buf), \"--nice-name=%s\", SERVER_NAME);","sourceCodeStart":181,"sourceCodeEnd":217,"githubUrl":"https://github.com/MuntashirAkon/AppManager/blob/0152f468fc9463ee02dc2ca83f6fe4989a2c4ca5/app/src/main/cpp/run_server.c#L181-L217","documentation":"setenv(\"CLASSPATH\", exec_jar_path, 1) failed inside main() just before execv of /system/bin/app_process. setenv here effectively only fails on ENOMEM, so the runtime could not record the jar path in the environment — without CLASSPATH the spawned app_process cannot locate am.jar, so the launch is abandoned and the temporary jar unlinked.","triggerScenarios":"Thrown at app/src/main/cpp/run_server.c:199 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Free memory and retry the launch, since setenv here effectively only fails on ENOMEM","Verify exec_jar_path is a valid, non-null string before setenv","Log errno to distinguish allocation failure from other environment errors"],"exampleFix":null,"handlingStrategy":"fallback","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"0152f468fc9463ee02dc2ca83f6fe4989a2c4ca5","analyzedAt":"2026-09-12T14:03:37.243Z","contentChangedAt":"2026-09-12T14:03:37.243Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}