一個通用的linux系統中C語言版讀取配置文件的函數。
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#include
<stdio.h>#include
<stdlib.h>#include
<string.h>#include
<assert.h>#include
<errno.h>#define
KEYVALLEN 100/*
刪除左邊的空格 */char *
l_trim(char *
szOutput, const char *szInput){ assert(szInput
!= NULL); assert(szOutput
!= NULL); assert(szOutput
!= szInput); for (NULL;
*szInput != '\0' &&
isspace(*szInput);
++szInput){ ; } return strcpy(szOutput,
szInput);}/*
刪除右邊的空格 */char *r_trim(char *szOutput,
const char *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;}/*
刪除兩邊的空格 */char *
a_trim(char *
szOutput, const char *
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; }
else if (
strncmp(buf,appname,strlen(appname))==0
){ found
= 1; continue; } }
else if(
found == 1 ){ if(
buf[0] == '#' ){ continue; }
else if (
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：
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[cls_server]#配置文件等號左右可以有空格也可以沒有ip=192.16.31.2 |