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 |