Adding Logging and Time Functionality in BusyBox and Disabling CBQ Support · Pull Request !156 · src-openEuler/busybox

The first patch adds experimental logging and time functionality to enhance debugging capabilities, primarily for the `zcip` utility. The second patch  disables CBQ (Class-Based Queueing) support in `tc.c` due to its deprecation in modern Linux systems.

**Origin of the Issue:**
- **CBQ Deprecation**: CBQ is no longer supported in Linux, and its usage in tools like `tc` can lead to errors. The deprecation is aligned with modern Linux systems and network traffic management methods.
- **Logging and Time Enhancements**: The addition of logging functionality and time-related features supports better debugging and tracking, especially useful for utilities like `zcip` in BusyBox.

**Code Changes Introduced:**

1. **Adding Logging and Time Functionality:**
   - Introduced experimental logging functionality and time-related features into `stime.c` and `Kbuild.src`.
   ```diff
   +lib_$(CONFIG_DATE) += stime.o
   +lib_$(CONFIG_RDATE) += stime.o
   ```

- Updated `stime.c` to handle time functionality and logging.
   ```diff
   +int stime(const time_t *xt) {
   +    struct timeval tv;
   +    tv.tv_sec = *xt;
   +    tv.tv_usec = 0;
   +    return settimeofday(&tv, NULL);
   +}
   ```
2. **Disabling CBQ Support in `tc.c`:**
   - The patch modifies the `tc.c` file to disable CBQ support and print an error message when CBQ-related options are used.
   ```diff
   @@ -230,7 +230,7 @@ static int cbq_parse_opt(int argc, char
       }
   -    else if (xxx == 1) { /* class based queuing */
   +    else { /* cbq not supported */
       printf("cbq not supported\n");
   ```
**Impact of Changes:**
These changes address two key improvements: 
1. **CBQ Support Removal**: This removes deprecated and unsupported functionality, reducing errors when using the `tc` tool on modern Linux systems.
2. **Logging and Time Enhancements**: Adds important functionality for logging and time-based operations, enhancing debugging and improving utility support for `zcip`.

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