function::kernel_buffer_quoted_error - Linux

Overview

kernel_buffer_quoted_error is a function that returns the error message given by the kernel, as quoted in the appropriate buffer.

Syntax

int kernel_buffer_quoted_error(char *buf, unsigned long len);

| Parameter | Description |
| — | — |
| buf | The buffer to store the error message |
| len | The size of the buffer |

Options/Flags

None

Examples

Example 1: Display the error message from the kernel

#include <linux/err.h>

int main() {
    char buf[1024];
    int ret = kernel_buffer_quoted_error(buf, sizeof(buf));

    if (ret < 0) {
        perror("kernel_buffer_quoted_error");
        return -1;
    }

    printf("Error: %s\n", buf);
    return 0;
}

Common Issues

Issue: The error message is truncated

Solution: Increase the size of the buffer passed to kernel_buffer_quoted_error().

Integration

kernel_buffer_quoted_error() can be used with other Linux commands and tools to retrieve and display error messages from the kernel. For example, it can be used with the sysfs filesystem to display error messages from device drivers.

Related Commands

• kernel_buffer_error()
• kernel_buffer_warn()
• kernel_buffer_debug()
• printk()