在 linux 个系统上按顺序打开和读取多个文件

Question

我有一个名为 file.txt 的文件，其中包含其他文件路径作为内容。现在，我试图打开我的“file.txt”，读取每个 line 并加载捕获行中的每个内容，因为我的行是一个文件路径。请参阅下面我的 file.txt 包含的内容：

file.txt:包含

/Desktop/path1.txt
/Desktop/path2.txt

并且，

/Desktop/path1.txt:包含

something...is here in this line
do you have you iurgiuwegrirg
ewirgewyrwyier
jhwegruyergue

/Desktop/path2.txt:包含类似..

的内容

abcd
efg
jshdjsdd

最后，如上所述，我想：

1.open file.txt
2.read each line, here line is a path
3.open line as a path,(/Desktop/path1.txt ...and /Desktop/path2.txt)
4.read contents in each path.

看看我的作品：

main.c

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#define PATH "file.txt"

void load_data_path(char *data_path)
{
   FILE *stream;
   char *line = NULL;
   size_t len = 0;
   ssize_t read;

   stream = fopen(data_path, "r");
   if (stream == NULL)
   {
       printf("FILE..not found\n");
       exit(EXIT_FAILURE);
   }
   while ((read = getline(&line, &len, stream)) != -1) 
   {
       printf("Content in path: %s", line);
   }
   free(line);
   fclose(stream);
   exit(EXIT_SUCCESS);
}
void load_parent_path(char *init_path)
{
   FILE *stream;
   char *line = NULL;
   size_t len = 0;
   ssize_t read;

   stream = fopen(init_path, "r");
   if (stream == NULL)
   {
       exit(EXIT_FAILURE);
   }
   while ((read = getline(&line, &len, stream)) != -1) 
   {
       printf("Current path from parent file: %s\n", line);
       //pass a current line, a path to another reader function
       load_data_path(line);
   }
   free(line);
   fclose(stream);
   exit(EXIT_SUCCESS);
}

int main(void)
{
   //PATH="file.txt", this functions reads contents of file.txt
   load_parent_path(PATH);
}

问题是，当我运行我的 main.cpp 时，它说 FILE...not found，来自 void load_data_path(char *data_path) 函数。和 segfault 当我删除 exit(EXIT_SUCCESS);

有什么建议吗？谢谢。

Answer 1

请注意函数getline()不会去除换行符。当 load_parent_path 函数调用 load_data_path 时，它会传递一个包含换行符的文件名。

Answer 2

getline() reads an entire line from stream, storing the address of the buffer containing the text into *lineptr. The buffer is null- terminated and includes the newline character, if one was found.

您可以使用以下方法删除结尾的换行符：

char *p = strchr(line, '\n');
if (p != NULL) *p = '[=10=]';

在 linux 个系统上按顺序打开和读取多个文件

Open and read multiple files sequentially on linux systems

c

linux

fopen