LINUX C 数据文件的添加，修改，删除 实例

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>

#include<sys/types.h>

#include<sys/timeb.h>

main()

{

char *pp[] = {"Hongkong123",

"Singgapore456",

"Beijing",

"London",

"Washington"

};

AddDataFile("./config/ppp.conf",":",pp,5);

//AlterDataFlie("./config/ppp.conf",":",pp,5,"bclb4eyr0");

//DeleteDataFile("./config/ppp.conf",":","bclb4eyr0");

}

/*

*对数据文件进行添加

*参数1，数据文件路径，参数二，行内数据分隔符，参数三，传入数据指针数组，参数四，数组下标个数

*

*/

int AddDataFile(char *af_file_path,char *af_sign,char **pp,int *array_sum)

{

/*

*随机生成一个5到8位的随机数

*/

unsigned int seedVal;

struct timeb timeBuf;

ftime(&timeBuf);

seedVal=((((unsigned int)timeBuf.time&0xFFFF)+

(unsigned int)timeBuf.millitm)^

(unsigned int)timeBuf.millitm);

srand((unsigned int)seedVal);

char buffer[10];

memset(buffer,0,sizeof(buffer));

int len = (rand() % (9-6))+ 7;

static const char string[]= "0123456789abcdefghiljklnopqrstuvwxyz";

int i;

for(i = 0; i < len; i++)

{

buffer[i] = string[rand()% (strlen(string)-1)];

}

char chnew_filebuf[256];

memset(chnew_filebuf,0,sizeof(chnew_filebuf));

strcat(chnew_filebuf,buffer);

int j;

for(j = 0;j < array_sum ; j++)

{

strcat(chnew_filebuf,af_sign);

strcat(chnew_filebuf,pp[j]);

}

printf("------->%s<---------/n",chnew_filebuf);

FILE *f;

f = fopen(af_file_path,"r+");

fseek(f,0,SEEK_END);

fseek(f,-1,SEEK_CUR);

if (fgetc(f)== 10)

{

fseek(f,0,SEEK_END);

fputs(chnew_filebuf,f);

}

else

{

fseek(f,0,SEEK_END);

fputs("/n",f);

fputs(chnew_filebuf,f);

}

fclose(f);

}

/*

*对数据文件进行修改

*参数1，数据文件路径，参数二，行内数据分隔符，参数三，传入数据指针数组，参数四，数组下标个数，参数五，修改标记值

*/

int AlterDataFlie(char *alf_file_path,char *alf_sign,char **pp,int *array_sum,char *al_linesign)

{

char chnew_filebuf[256];

char datafile_linebuf[256];

char line_name[40];

char *leave_line;

memset(chnew_filebuf,0,sizeof(chnew_filebuf));

strcat(chnew_filebuf,al_linesign);

int i;

for(i = 0;i < array_sum ; i++)

{

strcat(chnew_filebuf,alf_sign);

strcat(chnew_filebuf,pp[i]);

}

printf("------->%s<---------/n",chnew_filebuf);

FILE *f;

f = fopen(alf_file_path,"r+");

if(f == NULL)

{

printf("OPEN CONFIG FALID/n");

return 0;

}

fseek(f,0,SEEK_END);

long datafile_lenth = ftell(f);

int datafilebuf_lenth = strlen(chnew_filebuf);

char sum_buf[datafile_lenth+datafilebuf_lenth];

memset(sum_buf,0,sizeof(sum_buf));

fseek(f,0,SEEK_SET);

while(fgets(datafile_linebuf,256,f) != NULL)

{

if(strlen(datafile_linebuf) < 3) //判断是否是空行

{

strcat(sum_buf,datafile_linebuf);

continue;

}

leave_line = NULL;

leave_line = strstr(datafile_linebuf,alf_sign);

if(leave_line == NULL) //去除无标记的情况

{

strcat(sum_buf,datafile_linebuf);

continue;

}

int leave_num = leave_line - datafile_linebuf;

memset(line_name,0,sizeof(line_name));

strncpy(line_name,datafile_linebuf,leave_num);

if(strcmp(line_name,al_linesign) ==0)

{

strcat(sum_buf,chnew_filebuf);

strcat(sum_buf,"/n");

}

else

{

strcat(sum_buf,datafile_linebuf);

}

if(fgetc(f)==EOF)

{

break;

}

fseek(f,-1,SEEK_CUR);

memset(datafile_linebuf,0,sizeof(datafile_linebuf));

}

printf("----->%s<------/n",sum_buf);

remove(alf_file_path);

fclose(f);

FILE *fp;

fp = fopen(alf_file_path,"w+");

if(fp == NULL)

{

printf("OPEN CONFIG FALID/n");

return 2;

}

fseek(fp,0,SEEK_SET);

fputs(sum_buf,fp);

fclose(fp);

}

/*

*对数据文件进行删除

*参数1，数据文件路径，参数二，行内数据分隔符，参数三，删除标记值

*/

int DeleteDataFile(char *dlf_file_path,char *dlf_sign,char *dl_linesign)

{

char datafile_linebuf[256];

char line_name[40];

char *leave_line;

FILE *f;

f = fopen(dlf_file_path,"r+");

if(f == NULL)

{

printf("OPEN CONFIG FALID/n");

return 0;

}

fseek(f,0,SEEK_END);

long datafile_lenth = ftell(f);

char sum_buf[datafile_lenth];

memset(sum_buf,0,sizeof(sum_buf));

fseek(f,0,SEEK_SET);

while(fgets(datafile_linebuf,256,f) != NULL)

{

if(strlen(datafile_linebuf) < 3) //判断是否是空行

{

strcat(sum_buf,datafile_linebuf);

continue;

}

leave_line = NULL;

leave_line = strstr(datafile_linebuf,dlf_sign);

if(leave_line == NULL) //去除无标记的情况

{

strcat(sum_buf,datafile_linebuf);

continue;

}

int leave_num = leave_line - datafile_linebuf;

memset(line_name,0,sizeof(line_name));

strncpy(line_name,datafile_linebuf,leave_num);

if(strcmp(line_name,dl_linesign) ==0)

{

}

else

{

strcat(sum_buf,datafile_linebuf);

}

if(fgetc(f)==EOF)

{

break;

}

fseek(f,-1,SEEK_CUR);

memset(datafile_linebuf,0,sizeof(datafile_linebuf));

}

printf("---sum_buf---->%s<----------/n",sum_buf);

remove(dlf_file_path);

fclose(f);

FILE *fp;

fp = fopen(dlf_file_path,"w+");

if(fp == NULL)

{

printf("OPEN CONFIG FALID/n");

return 2;

}

fseek(fp,0,SEEK_SET);

fputs(sum_buf,fp);

fclose(fp);

}