Mac OS X和Linux中的安全字符串函数 [英] Safe String Functions In Mac OS X and Linux

问题描述

Mac OSX和Linux中是否有与Windows中相同的安全字符串函数(如strcpy_s，strncpy_s..etc)?

are there are equivalent secure string functions in Mac OSX and Linux just like the ones in Windows (strcpy_s,strncpy_s..etc) ?

在多字节和宽字符之间转换的函数呢?

What about functions that convert between multi-byte and wide characters?

推荐答案

安全的字符串操作有两种策略. Linux/ glibc 维护人员拒绝添加安全功能，理由是您应保留字符串的长度并使用memcpy.

There are two strategies for safe string manipulation. The Linux / glibc maintainers refuse to add safe functions, arguing that you should keep the length of your strings at hand and use memcpy.

另一方面，Mac OSX包含BSD中的strlcpy和strlcat. snprintf 和

On the other hand, Mac OSX includes strlcpy and strlcat from BSD. snprintf and asprintf can be used on both platforms to much the same effect:

size_t strlcpy(char *d, char const *s, size_t n)
{
    return snprintf(d, n, "%s", s);
}

size_t strlcat(char *d, char const *s, size_t n)
{
    return snprintf(d, n, "%s%s", d, s);
}

您还可以考虑使用BSD实现在此处找到.如果您的代码将在多个平台上编译，则可以使用预定义的库宏:

You could also consider using the BSD implementation found here. If your code will be compiled on multiple platforms, you can test for the presence of glibc using pre-defined library macros:

#if defined __GNU_LIBRARY__ || defined __GLIBC__

    size_t strlcpy(char *, char const *, size_t);
    size_t strlcat(char *, char const *, size_t);

#endif 

使用最容易处理字符编码之间的转换iconv 界面.

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