lazarus(pascal)和c语言读日志文件筛选保存为新文件

lazarus(pascal)和c语言读日志文件筛选保存为新文件，源于看日志每次从一个很多内容文件里查找不方便，写个代码输入时分秒参数，然后按行读取比较日志时间，当前秒和上一秒的输出保存为新文件，只保存2秒钟文件小多了，容易观察。

首先上pascal代码

program project1;

{$mode objfpc}{$H+}

uses
 {$IFDEF UNIX}
  cthreads,
   {$ENDIF}
  Classes,
  SysUtils,
  CustApp,
  dateutils { you can add units after this };

type

  { analyselog }

  analyselog = class(TCustomApplication)
  protected
    procedure DoRun; override;
  public
    constructor Create(TheOwner: TComponent); override;
    destructor Destroy; override;
    procedure WriteHelp; virtual;
    procedure outLog(fn,outf,t, nextt: string); virtual;
    function changeSencond(dt: ttime; d: integer): ttime; virtual;
  end;

  { analyselog }

  procedure analyselog.DoRun;
  var
    fn: string;
     dt1,dt2: string;
    dt: TTime;
  begin
    if GetParamCount > 1 then
    begin
       dt2:= GetParams(1);
       writeln(dt2);
       dt := changeSencond(StrToTime(dt2), -1);
       dt1 := timetostr(dt);
        writeln(dt1);
       fn := format('%s/dms-jc5000.txt', [GetParams(2)]);
          writeln(GetParams(2));
       writeln(fn);
       if FileExists(fn) then  outLog(fn,'jc5000.txt',dt1, dt2);
        if GetParamCount > 2 then
        begin
             fn := format('%s/dms-all.txt', [GetParams(2)]);
             if FileExists(fn) then  outLog(fn,'dmsall.txt',dt1, dt2);
       end
    end
    else
      WriteHelp;
    Terminate;
  end;

  constructor analyselog.Create(TheOwner: TComponent);
  begin
    inherited Create(TheOwner);
    StopOnException := True;
  end;

  destructor analyselog.Destroy;
  begin
    inherited Destroy;
  end;

  procedure analyselog.WriteHelp;
  begin
    { add your help code here }
    writeln('normal usage example: ', ExeName, ' 06:39:37 /root/logs ');
    writeln('then we will get /root/logs/jc5000.txt from 06:39:36 to 06:39:37');
    writeln('other usage example: ', ExeName, ' 06:39:37 /root/logs all');
    writeln('then we will get /root/logs/jc5000.txt and /root/logs/dmsall.txt from 06:39:36 to 06:39:37');
  end;

  function analyselog.changeSencond(dt: ttime; d: integer): ttime;
  var
    Hour, Min, Sec, MSec: word;
  begin
    DecodeTime(dt, Hour, Min, Sec, MSec);
    Sec := Sec + d;
    Result := EncodeTime(Hour, Min, Sec, MSec);
  end;


  procedure analyselog.outLog(fn,outf,t, nextt: string);
  var
    F: TextFile;
    oL: TStringList;
    d, linestr: string;
    tover: integer;
  begin
    AssignFile(F, fn);
    Reset(F);
    tover := 0;
    oL := TStringList.Create;
    while not EOF(F) do
    begin
      ReadLn(F, linestr);
      if length(linestr) > 0 then
      begin
        d := copy(linestr, 1, 8);
        if (0 = comparetext(d, t)) or (0 = comparetext(d, nextt)) then
        begin
          writeln(linestr);
          oL.Add(linestr);
          tover := 1;
        end
        else
        begin
          if tover > 0 then  break;
        end;

      end;
    end;
    CloseFile(F);
    oL.SaveToFile(outf);
    oL.Free;
  end;

var
  Application: analyselog;

{$R *.res}

begin
  Application := analyselog.Create(nil);
  Application.Title := 'analyse';
  Application.Run;
  Application.Free;
end.

实现过程中发现pascal里没有直接命令复制文件，只好外面整个脚本，因为我这从文件里查找内容不能影响原先文件被别的应用继续写

#!/bin/bash
if [ ! -n "$1" ] ;then
echo "you have not input a hh:mm:ss !"
echo "example : ./getjc5000log.sh 06:39:37"
else
echo "the word you input is $1"
d='/root/logs'
cp -f $d/dms-jc5000.log $d/dms-jc5000.txt
cp -f $d/dms-all.log $d/dms-all.txt
./analyselog $1 ${d} all
fi

写完之后运行可以，但是觉得发布试用要2个文件稍微不完美，好吧，再用c实现一下

#include 
#include 
#include 
#include 
#include 
#define _XOPEN_SOURCE
#define __USE_XOPEN
#include 
// 每行最大长度
#define LINE_MAX 2048
//判断一行数据是否有可打印的字符，只有空格不可见的不算，然后判断行首是否满足需要
int isblankline(char str[], char* time1, char* time2) {
    int k = 0;
    for (int i = 0; str[i] != '\0'; i++) {
        if (0 == isgraph(str[i])) {
            k = 1;
            break;
        }
    }
    if (1 == k && (0 == strncmp(str, time1, 8) || 0 == strncmp(str, time2, 8))) {
        return 1;
    }
    return 0;
}
//将字符串转成时间戳,偏移后输出字符串
long analyse_time(char* str_time, char* new_time)
{
    struct tm stm;
    memset(&stm, 0, sizeof(stm));
    strptime(str_time, "%H:%M:%S", &stm);
    stm.tm_year = 70;
    stm.tm_mday = 1;
    stm.tm_mon = 1;
    printf("str_time= %d %d %d     %d\n", stm.tm_hour, stm.tm_min, stm.tm_sec, sizeof(new_time));
    stm.tm_sec--;
    long t = mktime(&stm);
    struct tm tm2 = *localtime(&t);
    strftime(new_time, 10, "%H:%M:%S", &tm2);
    printf("new_time= %s    sec %d\n", new_time, tm2.tm_sec);
    return 0;
}
// 按行读文件满足需要的另存为文件
int createfile(char* file1, char* file2, char* file3, char* time1, char* time2) {
    char cmd[128] = { 0 };
    sprintf(cmd, "cp -f %s %s", file1, file2);
    int k = system(cmd);
    printf("cp %s ！%d\n", file2, k);
    if (access(file2, F_OK) == 0) {
        FILE* fp = fopen(file2, "r");
        FILE* out = fopen(file3, "w");
        if (NULL == fp) {
            printf("open file failed.\n");
            return -1;
        }
        if (NULL == out) {
            printf("out file failed.\n");
            return -1;
        }
        int line_len = 0; // 文件每行的长度
        char buf[LINE_MAX] = { 0 }; // 行数据缓存
        while (fgets(buf, LINE_MAX, fp)) {
            line_len = strlen(buf);
            if (isblankline(buf, time1, time2)) {
                printf("%s\n", buf);
                /** 对每行数据(buf)进行处理 **/
                fputs(buf, out);
            }
        }
        if (0 == feof) {
            // 未读到文件末尾
            printf("fgets error no end\n");
        }
        fclose(fp);
        fclose(out);
    }
    else {
        printf("isnotexist %s！\n", file2);
    }
}

int main(int argc, char* argv[])
{
    char newtime[10] = { 0 };
    printf("hello world\n Harmony is coming！%d\n", argc);
    if (argc < 2) {
        printf("no param ！ example: ./loganalyse 00:00:11\n");
        return 1;
    }
    else {
        printf("app= %s  param = %s\n", argv[0], argv[1]);
        analyse_time(argv[1], newtime);
    }
    createfile("dms-all.log", "dms-all.txt", "dmsall.txt", newtime, argv[1]);
    createfile("dms-jc5000.log", "dms-jc5000.txt", "jc5000.txt", newtime, argv[1]);
    return 0;
}