linux读取配置文件(C语言版)

#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);
}