C语言读取INI配置文件 (Linux可用)

2016/01/12

Linux平台下C语言读取配置文件，Linux如何读取配置文件。c语言实现，可在linux平台上用了，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。

示例代码：

#define CONF_FILE_PATH	"Config.ini"
#include &lt;string.h&gt;
#ifdef WIN32
#include &lt;Windows.h&gt;
#include &lt;stdio.h&gt;
#else
#define  MAX_PATH 260
#include &lt;unistd.h&gt;
#include &lt;fcntl.h&gt;
#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
#include &lt;stdarg.h&gt;
#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 = &amp;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 )&amp;&amp;(flag == 1)) 
			{ 
				if(strstr(szLine,key)!=NULL) 
				{ 
					//注释行
					if ('#' == szLine[0])
					{
					}
					else if ( '/' == szLine[0] &amp;&amp; '/' == 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);
	char *a = GetIniKeyString("CAT","name",g_szConfigPath);
	printf("%d\r\n",iCatAge);
	printf("%s\r\n",a);

	return 0;
}

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

#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)];

{

*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);

char *a = GetIniKeyString("CAT","name",g_szConfigPath);

printf("%d\r\n",iCatAge);

printf("%s\r\n",a);

return 0;

}

搬运工：C/C++程序员之家分享一些源代码 原文链接：http://blog.csdn.net/lxh1230119/article/details/7781333/

Blogroll