Linux下解析配置文件
由于公司要开发Linux下服务器软件，需要解析配置文件，网上google了一下，没有找到方便的方法，于是自己动手写了一个，附上源码。（不要说我火星，大家是怎么解析配置文件的？）parseconf-1.0.zipourdev_554086.zip(文件大小:75K) (原文件名:parseconf-1.0.zip)
执行结果：
$ ./parseconf
'net.ipv4.ip_forward' = '0'
'net.ipv4.conf.default.rp_filter' = '1'
'net.ipv4.conf.default.accept_source_route' = '0'
'kernel.sysrq' = '0'
'kernel.core_uses_pid' = '1'
'net.bridge.bridge-nf-call-ip6tables' = '0'
'net.bridge.bridge-nf-call-iptables' = '0'
'net.bridge.bridge-nf-call-arptables' = '0'
'var1' = 'value1'
'var2_var2var2' = 'value2 value2_ value2_value2'
'name' = 'hugeice'
'group' = 'r&d'
'id' = '501'
'name.jts' = 'Jia Tieshuan'
'group.jts' = 'r&d'
'id' = '502'
'name.hxw' = 'Huang Xunwang'
'group.hxw' = 'r&d'
'id' = '503'
'end' = 'true;'
done.
用来测试的配置文件test.conf：
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
# Controls source route verification
net.ipv4.conf.default.rp_filter = 1
# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality of the kernel
kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
kernel.core_uses_pid = 1
# Disable netfilter on bridges.
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0
# this test be added by hugeice
var1=value1
var2_var2\
var2 = \
value2 value2_ \
value2_value2
name = hugeice
group = r&d
id = 501
name.jts = Jia Tieshuan
group.jts = r&d
id = 502
name.hxw = Huang Xunwang
group.hxw = r&d
id = 503
end = true;
-------------------------------------------
论坛是不是考虑支持一下上传tar打包的文件？ 源码，也可以在windows下用，不过Win下又读写ini文件的API就用不着这个了，不停的调parseconf_get_next_variable就可以返回所有变量的变量名和变量值（都是字符串格式）
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define PARSECONF_MAX (1024 * 64)
#define PARSECONF_LINE_MAX (1024 * 4)
/* open a config file and return file pointer*/
FILE* parseconf_open_file(const char *path)
{
return fopen(path, "r");
}
/* close config file */
int parseconf_close_file(FILE *fp)
{
return fclose(fp);
}
/* get next variable in config file and move file position to next line */
/* return: value length or -1 for file end or call failed */
int parseconf_get_next_variable(FILE *fp, char *name_buf,
int name_buf_size, int *name_len,
char *value_buf, int value_buf_size)
{
char line, subline;
char *pline, *plineend, *psub, *psubend, *pequal;
char *pnameend, *pvalue;
int continue_flag, var_name_len, var_value_len;
/* get next variable */
pline = plineend = line;
while ( fgets(subline, sizeof(subline), fp) != NULL ) {
psub = subline;
psubend = psub + strlen(psub);
/* skip space */
for ( ;
psub < psubend && (' ' == *psub || '\t' == *psub);
psub++ );
/* skip comment */
if ( '#' == *psub )
continue;
/* skip empty line */
if ( psub == psubend )
continue;
/* truncation trailing space and "\r" and "\n" */
for ( ;
psubend > psub
&& (' ' == psubend[-1]
|| '\t' == psubend[-1]
|| '\r' == psubend[-1]
|| '\n' == psubend[-1]);
psubend-- );
*psubend = '\0';
/* skip empty line again */
if ( psub == psubend )
continue;
/* continue line ? */
continue_flag = ('\\' == psubend[-1]);
if ( continue_flag )
*--psubend = '\0';
/* link sub line to line */
memcpy(plineend, psub, psubend - psub);
plineend += psubend - psub;
/* line end */
if ( !continue_flag )
break;
}
/* file end ? */
if ( pline == plineend && feof(fp) )
return -1;
/* terminate line */
*plineend = '\0';
/* find equal */
pequal = strchr(pline, '=');
if ( NULL == pequal )
pequal = plineend;
/* find variable's name */
for ( pnameend = pequal;
pnameend > pline
&& (' ' == pnameend[-1] || '\t' == pnameend[-1]);
pnameend-- );
var_name_len = pnameend - pline;
if ( (var_name_len + 1) > name_buf_size )
return -2;
memcpy(name_buf, pline, var_name_len);
name_buf = '\0';
if ( NULL != name_len )
*name_len = var_name_len;
/* find variable's value */
if ( pequal == plineend ) {
pvalue = plineend;
} else {
for ( pvalue = pequal + 1;
pvalue < plineend && (' ' == *pvalue || '\t' == *pvalue );
pvalue++ );
}
var_value_len = plineend - pvalue;
if ( (var_value_len + 1) > value_buf_size )
return -2;
memcpy(value_buf, pvalue, var_value_len);
value_buf = '\0';
return var_value_len;
} 为什么大家都喜欢重复造轮子……
Linux下读取、分析配置文件的库还不够多么……
lz是如何google的？随意Google一下“Linux parse configuration lib”就能给出一堆结果…… 回复【2楼】minux啊啊?
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看来是没认真搜，呵呵，确实有好多，下了一个libconfig试试，谢谢批评！ 回复【3楼】hugeice 戬
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