在Windows下可以用GetPrivateProfileString或GetPrivateProfileInt方便读取.ini配置文件内容，但是在Linux平台上就一筹莫展了。为了解决该问题，打算用C来读取.ini，即可不受平台的限制了。

#define CONF_FILE_PATH	"Config.ini"

#include <string.h>

#ifdef WIN32
#include <Windows.h>
#include <stdio.h>
#else

#define  MAX_PATH 260

#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#endif

char g_szConfigPath[MAX_PATH];

//获取当前程序目录
int GetCurrentPath(char buf[],char *pFileName)
{
#ifdef WIN32
	GetModuleFileName(NULL,buf,MAX_PATH); 
#else
	char pidfile[64];
	int bytes;
	int fd;

	sprintf(pidfile, "/proc/%d/cmdline", getpid());

	fd = open(pidfile, O_RDONLY, 0);
	bytes = read(fd, buf, 256);
	close(fd);
	buf[MAX_PATH] = '\0';

#endif
	char * p = &buf[strlen(buf)];
	do 
	{
		*p = '\0';
		p--;
#ifdef WIN32
	} while( '\\' != *p );
#else
	} while( '/' != *p );
#endif

	p++;

	//配置文件目录
	memcpy(p,pFileName,strlen(pFileName));
	return 0;
}

//从INI文件读取字符串类型数据
char *GetIniKeyString(char *title,char *key,char *filename) 
{ 
	FILE *fp; 
	char szLine[1024];
	static char tmpstr[1024];
	int rtnval;
	int i = 0; 
	int flag = 0; 
	char *tmp;

	if((fp = fopen(filename, "r")) == NULL) 
	{ 
		printf("have   no   such   file \n");
		return ""; 
	}
	while(!feof(fp)) 
	{ 
		rtnval = fgetc(fp); 
		if(rtnval == EOF) 
		{ 
			break; 
		} 
		else 
		{ 
			szLine[i++] = rtnval; 
		} 
		if(rtnval == '\n') 
		{ 
#ifndef WIN32
			i--;
#endif	
			szLine[--i] = '\0';
			i = 0; 
			tmp = strchr(szLine, '='); 

			if(( tmp != NULL )&&(flag == 1)) 
			{ 
				if(strstr(szLine,key)!=NULL) 
				{ 
					//注释行
					if ('#' == szLine[0])
					{
					}
					else if ( '\/' == szLine[0] && '\/' == szLine[1] )
					{
						
					}
					else
					{
						//找打key对应变量
						strcpy(tmpstr,tmp+1); 
						fclose(fp);
						return tmpstr; 
					}
				} 
			}
			else 
			{ 
				strcpy(tmpstr,"["); 
				strcat(tmpstr,title); 
				strcat(tmpstr,"]");
				if( strncmp(tmpstr,szLine,strlen(tmpstr)) == 0 ) 
				{
					//找到title
					flag = 1; 
				}
			}
		}
	}
	fclose(fp); 
	return ""; 
}

//从INI文件读取整类型数据
int GetIniKeyInt(char *title,char *key,char *filename)
{
	return atoi(GetIniKeyString(title,key,filename));
}

int main(int argc, char* argv[])
{
	char buf[MAX_PATH];
	memset(buf,0,sizeof(buf));
	GetCurrentPath(buf,CONF_FILE_PATH);
	strcpy(g_szConfigPath,buf);

	int iCatAge;
	char szCatName[32];
	
	iCatAge = GetIniKeyInt("CAT","age",g_szConfigPath);
	strcpy(szCatName,GetIniKeyString("CAT","name",g_szConfigPath));

	return 0;
}

下边是配置文件：

[CAT]

age=2

name=Tom