Busybox支持中文的解决办法

关注

原创最新推荐文章于 2026-04-20 02:29:20 发布 6.8k 阅读 AI 写同款· GEO 优化 ›

Linux kernel rootfs(busybox)支持中文的配置 1. 内核（kernel）文件系统支持中文配置内核源码路径下输入： make menuconfig 选择进入File system（文件系统配置选项） DOS/FAT/NT Filesystems —> [] Network File Systems —> -- Native language support —> 2. busybox 中文支持中文配置首先修改源码的makefile，配上交叉编译工具链。输入如下命令进入配置界面： make munuconfig 阅读详情

***************************************************************************************************************************
作者：EasyWave 时间：2012.01.15

类别：linux驱动开发声明：转载，请保留链接

***************************************************************************************************************************

在嵌入式linux系统中，busybox是最常见的用来构建文件系统的。可是从busybox1.17.0以上之后，对ls命令不做修改是无法显示中文的。就算是内核设置了支持中文的话，在shell下用ls命令也是无法显示中文的，这是因为busybox1.17.0以后版本对中文的支持进行了限制。现在就来讲讲如何修改让busybox1.17.0以上版本支持中文，要想让busybox1.17.0以上支持中文，需要修改两个文件：printable_string.c以及unicode.c 。下面来分析，为什么ls命令无法显示中文。请看printable_string.c未修改过的代码：

const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str)
{
	static char *saved[4];
	static unsigned cur_saved; /* = 0 */

	char *dst;
	const char *s;

	s = str;
	while (1) {
		unsigned char c = *s;
		if (c == '\0') {
			/* 99+% of inputs do not need conversion */
			if (stats) {
				stats->byte_count = (s - str);
				stats->unicode_count = (s - str);
				stats->unicode_width = (s - str);
			}
			return str;
		}
		if (c < ' ')
			break;
		if (c >= 0x7f)
			break;
		s++;
	}

#if ENABLE_UNICODE_SUPPORT
	dst = unicode_conv_to_printable(stats, str);
#else
	{
		char *d = dst = xstrdup(str);
		while (1) {
			unsigned char c = *d;
			if (c == '\0')
				break;
		        if (c < ' ' || c >= 0x7f)
			       *d = '?';
			d++;
		}
		if (stats) {
			stats->byte_count = (d - dst);
			stats->unicode_count = (d - dst);
			stats->unicode_width = (d - dst);
		}
	}
#endif

	free(saved[cur_saved]);
	saved[cur_saved] = dst;
	cur_saved = (cur_saved + 1) & (ARRAY_SIZE(saved)-1);

	return dst;
}

从上面代码23和24行以及37和38行可以看出：大于0x7F的字符直接被break掉，或者直接被“？”代替了。所以就算是linux内核设置了支持中文，也是无法显示出来的，被“？”代替了。修改红色加粗的代码如下：

const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str)
{
	static char *saved[4];
	static unsigned cur_saved; /* = 0 */

	char *dst;
	const char *s;

	s = str;
	while (1) {
		unsigned char c = *s;
		if (c == '\0') {
			/* 99+% of inputs do not need conversion */
			if (stats) {
				stats->byte_count = (s - str);
				stats->unicode_count = (s - str);
				stats->unicode_width = (s - str);
			}
			return str;
		}
		if (c < ' ')
			break;
	/*
		if (c >= 0x7f)
			break;
	*/
		s++;
	}

#if ENABLE_UNICODE_SUPPORT
	dst = unicode_conv_to_printable(stats, str);
#else
	{
		char *d = dst = xstrdup(str);
		while (1) {
			unsigned char c = *d;
			if (c == '\0')
				break;
			if (c < ' ' /*|| c >= 0x7f */)
				*d = '?';
			d++;
		}
		if (stats) {
			stats->byte_count = (d - dst);
			stats->unicode_count = (d - dst);
			stats->unicode_width = (d - dst);
		}
	}
#endif

	free(saved[cur_saved]);
	saved[cur_saved] = dst;
	cur_saved = (cur_saved + 1) & (ARRAY_SIZE(saved)-1);

	return dst;
}

经过以上的修改之后，同时busybox1.17.0配置的时候没有选中[] Support Unicode的话，那么采用ls命令是可以看到中文的，这个我自己已经亲自测试过的。可是还有一种情况：busybox1.17.0在配置的时候选中了：[*] Support Unicode，见下：

在配置里，有Support Unicode选上的： 
Busybox Settings->General Configuration->
   │ │[ ] Enable locale support (system needs locale for this to work)     │ │  
   │ │[*] Support Unicode                                                  │ │  
   │ │[*] Support for --long-options                                       │ │

那么这样还需要修改一个文件，这个文件就是：unicode.c。如果不修改这个文件，ls命令也是无法显示出中文的。见下未修改的代码：

static char* FAST_FUNC unicode_conv_to_printable2(uni_stat_t *stats, const char *src, unsigned width, int flags)
{
	char *dst;
	unsigned dst_len;
	unsigned uni_count;
	unsigned uni_width;

	if (unicode_status != UNICODE_ON) {
		char *d;
		if (flags & UNI_FLAG_PAD) {
			d = dst = xmalloc(width + 1);
			while ((int)--width >= 0) {
				unsigned char c = *src;
				if (c == '\0') {
					do
						*d++ = ' ';
					while ((int)--width >= 0);
					break;
				}
				*d++ = (c >= ' ' && c < 0x7f) ? c : '?';
				src++;
			}
			*d = '\0';
		} else {
			d = dst = xstrndup(src, width);
			while (*d) {
				unsigned char c = *d;
				if (c < ' ' || c >= 0x7f)
					*d = '?';
				d++;
			}
		}
		if (stats) {
			stats->byte_count = (d - dst);
			stats->unicode_count = (d - dst);
			stats->unicode_width = (d - dst);
		}
		return dst;
	}

	dst = NULL;
	uni_count = uni_width = 0;
	dst_len = 0;
	while (1) {
		int w;
		wchar_t wc;

#if ENABLE_UNICODE_USING_LOCALE
		{
			mbstate_t mbst = { 0 };
			ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst);
			/* If invalid sequence is seen: -1 is returned,
			 * src points to the invalid sequence, errno = EILSEQ.
			 * Else number of wchars (excluding terminating L'\0')
			 * written to dest is returned.
			 * If len (here: 1) non-L'\0' wchars stored at dest,
			 * src points to the next char to be converted.
			 * If string is completely converted: src = NULL.
			 */
			if (rc == 0) /* end-of-string */
				break;
			if (rc < 0) { /* error */
				src++;
				goto subst;
			}
			if (!iswprint(wc))
				goto subst;
		}
#else
		src = mbstowc_internal(&wc, src);
		/* src is advanced to next mb char
		 * wc == ERROR_WCHAR: invalid sequence is seen
		 * else: wc is set
		 */
		if (wc == ERROR_WCHAR) /* error */
			goto subst;
		if (wc == 0) /* end-of-string */
			break;
#endif
		if (CONFIG_LAST_SUPPORTED_WCHAR && wc > CONFIG_LAST_SUPPORTED_WCHAR)
			goto subst;
		w = wcwidth(wc);
		if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0) /* non-printable wchar */
		 || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
		 || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
		) {
 subst:
			wc = CONFIG_SUBST_WCHAR;
			w = 1;
		}
		width -= w;
		/* Note: if width == 0, we still may add more chars,
		 * they may be zero-width or combining ones */
		if ((int)width < 0) {
			/* can't add this wc, string would become longer than width */
			width += w;
			break;
		}

		uni_count++;
		uni_width += w;
		dst = xrealloc(dst, dst_len + MB_CUR_MAX);
#if ENABLE_UNICODE_USING_LOCALE
		{
			mbstate_t mbst = { 0 };
			dst_len += wcrtomb(&dst[dst_len], wc, &mbst);
		}
#else
		dst_len += wcrtomb_internal(&dst[dst_len], wc);
#endif
	}

	/* Pad to remaining width */
	if (flags & UNI_FLAG_PAD) {
		dst = xrealloc(dst, dst_len + width + 1);
		uni_count += width;
		uni_width += width;
		while ((int)--width >= 0) {
			dst[dst_len++] = ' ';
		}
	}
	dst[dst_len] = '\0';
	if (stats) {
		stats->byte_count = dst_len;
		stats->unicode_count = uni_count;
		stats->unicode_width = uni_width;
	}

	return dst;
}

见上面20行和28行，需要修改一下，修改后的代码见下：

static char* FAST_FUNC unicode_conv_to_printable2(uni_stat_t *stats, const char *src, unsigned width, int flags)
{
	char *dst;
	unsigned dst_len;
	unsigned uni_count;
	unsigned uni_width;

	if (unicode_status != UNICODE_ON) {
		char *d;
		if (flags & UNI_FLAG_PAD) {
			d = dst = xmalloc(width + 1);
			while ((int)--width >= 0) {
				unsigned char c = *src;
				if (c == '\0') {
					do
						*d++ = ' ';
					while ((int)--width >= 0);
					break;
				}
				*d++ = (c >= ' '/* && c < 0x7f */) ? c : '?';
				src++;
			}
			*d = '\0';
		} else {
			d = dst = xstrndup(src, width);
			while (*d) {
				unsigned char c = *d;
				if (c < ' '/* || c >= 0x7f */)
					*d = '?';
				d++;
			}
		}
		if (stats) {
			stats->byte_count = (d - dst);
			stats->unicode_count = (d - dst);
			stats->unicode_width = (d - dst);
		}
		return dst;
	}

	dst = NULL;
	uni_count = uni_width = 0;
	dst_len = 0;
	while (1) {
		int w;
		wchar_t wc;

#if ENABLE_UNICODE_USING_LOCALE
		{
			mbstate_t mbst = { 0 };
			ssize_t rc = mbsrtowcs(&wc, &src, 1, &mbst);
			/* If invalid sequence is seen: -1 is returned,
			 * src points to the invalid sequence, errno = EILSEQ.
			 * Else number of wchars (excluding terminating L'\0')
			 * written to dest is returned.
			 * If len (here: 1) non-L'\0' wchars stored at dest,
			 * src points to the next char to be converted.
			 * If string is completely converted: src = NULL.
			 */
			if (rc == 0) /* end-of-string */
				break;
			if (rc < 0) { /* error */
				src++;
				goto subst;
			}
			if (!iswprint(wc))
				goto subst;
		}
#else
		src = mbstowc_internal(&wc, src);
		/* src is advanced to next mb char
		 * wc == ERROR_WCHAR: invalid sequence is seen
		 * else: wc is set
		 */
		if (wc == ERROR_WCHAR) /* error */
			goto subst;
		if (wc == 0) /* end-of-string */
			break;
#endif
		if (CONFIG_LAST_SUPPORTED_WCHAR && wc > CONFIG_LAST_SUPPORTED_WCHAR)
			goto subst;
		w = wcwidth(wc);
		if ((ENABLE_UNICODE_COMBINING_WCHARS && w < 0) /* non-printable wchar */
		 || (!ENABLE_UNICODE_COMBINING_WCHARS && w <= 0)
		 || (!ENABLE_UNICODE_WIDE_WCHARS && w > 1)
		) {
 subst:
			wc = CONFIG_SUBST_WCHAR;
			w = 1;
		}
		width -= w;
		/* Note: if width == 0, we still may add more chars,
		 * they may be zero-width or combining ones */
		if ((int)width < 0) {
			/* can't add this wc, string would become longer than width */
			width += w;
			break;
		}

		uni_count++;
		uni_width += w;
		dst = xrealloc(dst, dst_len + MB_CUR_MAX);
#if ENABLE_UNICODE_USING_LOCALE
		{
			mbstate_t mbst = { 0 };
			dst_len += wcrtomb(&dst[dst_len], wc, &mbst);
		}
#else
		dst_len += wcrtomb_internal(&dst[dst_len], wc);
#endif
	}

	/* Pad to remaining width */
	if (flags & UNI_FLAG_PAD) {
		dst = xrealloc(dst, dst_len + width + 1);
		uni_count += width;
		uni_width += width;
		while ((int)--width >= 0) {
			dst[dst_len++] = ' ';
		}
	}
	dst[dst_len] = '\0';
	if (stats) {
		stats->byte_count = dst_len;
		stats->unicode_count = uni_count;
		stats->unicode_width = uni_width;
	}

	return dst;
}

经过以上修改之后，就算配置支持Unicode，ls命令也是可以支持中文的。同时也可以进入中文目录可以文件夹。

收录于