所以我试图弄清楚如何在文本文档中扫描单个单词的行。关键字来自文本文件并存储在结构中。同一文件还包含一个目录,用于扫描要扫描该关键字的文件。我的程序可以从请求文件中读取并打开指定的目录。它还可以看到那里有哪些文件。此时,在尝试扫描文件并打印回用户的过程中,它会出现SegFault错误。非常感谢任何帮助。
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <dirent.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/types.h>
/* Structs */
struct input
{
char match[6];
char path[100];
char key[20];
};
/* Variables */
//char match[6];
//char path[100];
//char key[20];
int last = 0;
int linen = 1;
char filename[100];
char top[256];
int x = 0;
static int MAXLINESIZE = 1000;
static int MAXDIRNAME = 200;
static int MAXKEYWORD = 1000;
struct input insave[50];
/* Prototypes */
void readfile();
void readtdir();
void scanfile();
/* Methods */
//Scan directory in in.txt file for text files to scan
void readtdir()
{
DIR *dir;
struct dirent *dirr;
char temp[256];
for(x = 0; x < last; x++)
{
dir = opendir(insave[x].path);
strcpy(top, insave[x].path);
printf("\nOpened: %s\n", insave[x].path);
//printf("dir: %s\n", top);
if(dir != NULL)
{
while((dirr = readdir(dir)) != NULL)
{
if(!(strcmp(dirr->d_name,"..")))
{
continue;
}
else
{
if(!(strcmp(dirr->d_name,".")))
{
continue;
}
else
{
printf("%s\n",dirr->d_name);
if(dirr->d_type == 8)
{
sprintf(temp, "%s", dirr->d_name);
printf("%s\n", temp);
strcpy(filename, temp);
scanfile(filename);
}
}
}
}
}
closedir(dir);
}
return;
}
//Scan lines of individual file for keyword
void scanfile(char *argv)
{
FILE *fRead;
char line[MAXLINESIZE];
char templine[MAXLINESIZE];
int y = x;
fRead = fopen(argv, "r+");
if(fRead == NULL)
{
printf("File cannot be opened");
}
else
{
while(fgets(line,MAXLINESIZE,fRead) != NULL)
{
strcpy(templine, line);
if(strstr(templine,insave[y].key) != NULL)
{
printf("%s:%d:%s", filename, linen, line);
}
linen++;
}
}
fclose(fRead);
}
//Read in.txt file for commands
void readfile(char *argv)
{
FILE *pRead;
int x = 0;
char match[6];
char path[100];
char key[20];
pRead = fopen(argv, "r+");
if(pRead == NULL)
{
printf("File cannot be opened");
}
else
{
while(!feof(pRead))
{
if(fscanf(pRead, "%5s%99s%19s", match, path, key) != 3)
{
break;
}
else
{
strcpy(insave[x].match, match);
strcpy(insave[x].path, path);
strcpy(insave[x].key, key);
x++;
last = x;
}
}
}
fclose(pRead);
}
int main(int argc, char *argv[])
{
int x = 0;
argv[1] = "5"; //only used for testing purposes
argv[2] = "in.txt"; //only used for testing purposes
readfile(argv[2]);
readtdir();
printf("\n\n");
for(x = 0; x < last; x++)
{
printf("This is: %s\n",insave[x].match);
printf("This is: %s\n",insave[x].path);
printf("This is: %s\n\n",insave[x].key);
}
return 0;
}
答案 0 :(得分:0)
一些想法:
而不是幻数100
#include <limits.h>
// If NAME_MAX does not exist, try something like 1024 – 100 is small.
// At least during debug
char filename[NAME_MAX + 1];
而不是幻数256
// char temp[256];
struct dirent temp;
…
sprintf(temp.d_name, "%s", dirr->d_name);
printf("%s\n", temp.d_name);
strcpy(filename, temp.d_name);
不需要char templine[MAXLINESIZE];
,只需使用strstr(line,insave[y].key)
。
在main()
中,删除while(!feof(pRead))
。它没有任何意义。在 之后尝试阅读并且什么也得不到时,才会检测到EOF,在这种情况下,fscanf()
已经返回了EOF,您将break
。
为0 <= x < 50
确保insave[x]
。
而不是if(dirr->d_type == 8)
,请使用DT_REG
。
不做
argv[1] = "5"; //only used for testing purposes
argv[2] = "in.txt";
你不知道argv
有多大。代替:
char *my_argv[4];
my_argv[0] = argv[0];
my_argv[1] = "5"; //only used for testing purposes
my_argv[2] = "in.txt";
my_argv[3] = NULL;
readfile(my_argv[2]);