Linux内核中是否有像sprintf这样的C函数? [英] Is there a C function like sprintf in the Linux kernel?

问题描述

Linux内核中是否有类似sprintf()的功能(例如printf()-> printk())?

Is there function like sprintf() in Linux Kernel (like printf()->printk())?

推荐答案

是. https://git .kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/lib/vsprintf.c#n1828

int snprintf(char *buf, size_t size, const char *fmt, ...)
{
    va_list args;
    int i;

    va_start(args, fmt);
    i = vsnprintf(buf, size, fmt, args);
    va_end(args);

    return i;
}
EXPORT_SYMBOL(snprintf);

sprintf()本身容易出现缓冲区溢出.

sprintf() by itself is prone to buffer overflows. ^{CERT buffer overflows, Apple, etc}

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