linux读取配置文件(C语言版)

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#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<assert.h>
#include<errno.h>

#define KEYVALLEN 100
/*
删除左边的空格 /
char l_trim(char * szOutput,constchar szInput)
{
assert(szInput !=NULL);
assert(szOutput !=NULL);
assert(szOutput != szInput);

for (NULL; szInput !='\0' && isspace(szInput); ++szInput){
;
}

return strcpy(szOutput, szInput);
}

/ 删除右边的空格 /
char r_trim(char szOutput,constchar szInput)
{
char p =NULL;
assert(szInput !=NULL);
assert(szOutput !=NULL);
assert(szOutput != szInput);
strcpy(szOutput, szInput);
for(p = szOutput + strlen(szOutput) -1; p >= szOutput && isspace(p); --p){
;
}
(++p) ='\0';
return szOutput;
}

/ 删除两边的空格 /
char a_trim(char * szOutput,constchar * szInput)
{
char p =NULL;
assert(szInput !=NULL);
assert(szOutput !=NULL);
l_trim(szOutput, szInput);
for (p = szOutput + strlen(szOutput) -1;p >= szOutput && isspace(p); --p){
;
}
(++p) ='\0';
return szOutput;
}

int GetProfileString(char profile,char AppName,char KeyName,char KeyVal )
{
char appname[32],keyname[32];
char buf,c;
char buf_i[KEYVALLEN], buf_o[KEYVALLEN];
FILE fp;
int found=0;/* 1 AppName 2 KeyName /
if( (fp=fopen( profile,"r" ))==NULL ){
printf("openfile [%s] error [%s]\n",profile,strerror(errno) );
return(-1);
}
fseek( fp,0, SEEK_SET );
memset( appname,0,sizeof(appname) );
sprintf( appname,"[%s]", AppName );

while( !feof(fp) && fgets( buf_i, KEYVALLEN, fp )!=NULL ){
l_trim(buf_o, buf_i);
if( strlen(buf_o) <=0 )
continue;
buf =NULL;
buf = buf_o;

if( found ==0 ){
if( buf[0] !='[' ) {
continue;
}elseif ( strncmp(buf,appname,strlen(appname))==0 ){
found =1;
continue;
}

}elseif( found ==1 ){
if( buf[0] =='#' ){
continue;
}elseif ( buf[0] =='[' ) {
break;
}else {
if( (c = (char)strchr(buf,'=')) ==NULL )
continue;
memset( keyname,0,sizeof(keyname) );

sscanf( buf,"%[^=|^ |^\t]", keyname );
if( strcmp(keyname, KeyName) ==0 ){
sscanf( ++c,"%[^\n]", KeyVal );
char KeyVal_o = (char )malloc(strlen(KeyVal) +1);
if(KeyVal_o !=NULL){
memset(KeyVal_o,0,sizeof(KeyVal_o));
a_trim(KeyVal_o, KeyVal);
if(KeyVal_o && strlen(KeyVal_o) >0)
strcpy(KeyVal, KeyVal_o);
free(KeyVal_o);
KeyVal_o =NULL;
}
found =2;
break;
}else {
continue;
}
}
}
}
fclose( fp );
if( found ==2 )
return(0);
else
return(-1);
}

`void` `main()`
`{`
        `char` `ip[16];`
        `GetProfileString("./cls.conf","cls_server","ip", ip);`
        `printf("%s\n",ip);`
`}`

配置文件例子如下：

1
2
3
[cls_server]
#配置文件等号左右可以有空格也可以没有
ip=192.16.31.2

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