rprofile.c

linux下的配置文件读取原代码,简单易用

/* Magic C++ utilities programme (Mostly) portable public-domain implementation -- Copyright(C) 2003 Magicunix Infomation Technology Limited This file is part of magicd. magicd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. For details, see the Magic C++ World-Wide-Web page, `http://www.magicunix.com', or send a mail to the Magic C++ developers . */  
//#include <linux/config.h> 
#include "RProfile.h" 


/*subtract value in shared memory if it's 0return -1 */ 
 /*get a int value in config section - name of section key - name of key value - value of key */ 
int util_getinfo_int(char *section , char *key , int *nvalue , char * szFileName) 
{ 
	char szvalue[100]={0}; 
	//memset( szvalue , 0 , sizeof( szvalue)); 
	if( util_getinfo_str( section , key , szvalue , szFileName) == -1 ) 
	{ 
		*nvalue = 0; return -1; 
	} 
	*nvalue = atoi( szvalue ); 
	//printf("nvalue: %d\n",&nvalue)
	//if( errno == EINVAL || errno == ERANGE) 
	//	return -1; 
	return 0; 
} /*get a section in configuation file*/ 
int util_getinfo_str(char *section ,char *key , char *value , char * szFileName) 
{ 
	FILE *fd; 
	char buf[1024]; 
	char cfile[100]; 
	char line[100]; 
	char thekey[100]; 
	char thesection[100]; 
	char thevalue[100]; 
	char cursection[100]; 
	char *env; 
	memset( thekey , 0 , sizeof( thekey )); 
	memset( thesection , 0 , sizeof( thesection )); 
	memset( cursection , 0 , sizeof( cursection )); 
	memset( thevalue , 0 , sizeof( thevalue )); 
	memset(cfile,0,sizeof(cfile)); 
	memset(buf, 0 , sizeof( buf )); 
	memset(line , 0 , sizeof( line )); /* if( szInstallDir[ 0 ] != '/' ) { fprintf(stderr,"Can not get install dir\n"); return -1; } sprintf( cfile , "%s/etc/magic.ini" , szInstallDir); */ 
	if(( fd = fopen(szFileName,"r")) == NULL) 
	{ 
		printf("open profile error!\n" ); 
		return -1; 
	} 
	
	while( util_getline( fd , 1023 , line) != -1) 
	{ /*it is a section*/ 
		memset( thekey , 0 ,sizeof(thekey)); 
		memset( thevalue , 0 ,sizeof(thevalue)); 
		memset( thesection , 0 , sizeof(thesection )); 
		util_trim( line ); 
		if( line[0] == '#' ) 
			continue; 
		if( util_getsection( line , thesection ) == 0 ) 
		{ 
			memset( cursection , 0 , sizeof( cursection ) ); 
			strcpy( cursection , thesection ); 
			continue; 
		} /*it is a key*/ 
		else if( util_getkeyvalue( line , thekey , thevalue ) == 0 ) 
		{ /*it's the same with query value*/ 
			if( strcasecmp( cursection , section ) == 0 && strcasecmp( thekey , key) == 0 ) 
			{ 
				strcpy( value , thevalue ); 
				fclose(fd ); 
				return 0; 
			} 
		} 
		else if ( strlen( line ) != 0 ) 
		{ 
			printf("an unrecognise format:%s\n" , line ); 
			fclose(fd ); 
			return -1; 
		} 
		memset( line , 0 ,sizeof(line)); 
	} 
	fclose(fd ); 

	return -1; 
} /*pick out section name */ /*return -1 for error format*/ 
int util_getsection(char *line , char *section) 
{ 
	char *p1 , 
	*p2; 
	p1 = strchr( line , '[' ); 
	p2 = strchr( line , ']' ); 
	if( p1 == 0 || p2 == 0 ) 
	{ return -1; } 
	else 
	{ 
		memset( section , 0 , sizeof( section )); 
		strncpy( section , p1 + 1 , p2 - p1 - 1); 
		util_trim( section ); 
		return 0; 
	} 
} /*pick out section value */ /*return -1 for error format*/ 
int util_getkeyvalue(char *line ,char *thekey ,char *thevalue ) 
{ 
	char *p1; 
	p1 = strchr( line , '=' ); 
	if( p1 == 0 ) 
		return -1; 
	strncpy( thekey , line , p1 - line ); 
	strcpy( thevalue , p1 + 1 );
	 util_trim( thekey ); 
	util_trim( thevalue ); /*it's empty value*/ 
	if( strlen( thekey ) == 0 || strlen( thevalue ) == 0 ) 
		return -1; 
	return 0; 
} /*pick out the key of line string(with out delete blank space) */ /*return -1 for error format*/ /*return 0 for success*/ 
int util_getkeyvalue_notrim(char *line ,char *thekey ,char *thevalue ) 
{ 
	char *p1; p1 = strchr( line , '=' ); if( p1 == 0 ) return -1; strncpy( thekey , line , p1 - line ); strcpy( thevalue , p1 + 1 ); /*empty value*/ if( strlen( thekey ) == 0 || strlen( thevalue ) == 0 ) return -1; return 0; 
} /*get one line in file /*done not check file format return 1 for end of file */ 
int util_getline( FILE *fd , int nLineLen , char *line) 
{ 
	int c; 
	int i = 0; 
	memset( line , 0 , sizeof( line) ); 
	c = fgetc( fd ); 
	if( c == EOF ) 
	return -1; 
	while( c == '\r' || c == '\n' ) 
	{ 
		c = fgetc( fd ); 
		if( c == EOF ) 
			return -1; 
	} 
	while( c != '\r' && c != '\n' && c != EOF && i < nLineLen ) 
	{ 
		line[ i++ ] = c; 
		c = fgetc(fd ); 
	} 
	line[ i ] = '\0'; 
	return i; 
} 

void util_trim(char *buf ) 
{ 
	char tmp[1024]; 
	char *pbegin = buf; 
	int nlen = strlen(buf); 
	char *pend = buf + nlen - 1; 
	memset( tmp , 0 , sizeof( tmp )); 
	while( pbegin < buf + nlen && strchr( "\r\n\t " , *pbegin))
	 pbegin ++; 
	while( pend >= buf && strchr( "\r\n\t " , *pend))
	 pend --; 
	if( pend >= pbegin ) 
	strncpy( tmp , pbegin , pend - pbegin + 1); 
	memset( buf , 0 , sizeof( buf )); 
	strcpy( buf , tmp ); 
} /*get last modified time of a file*/