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How debian readdir integrates with other tools
How debian readdir integrates with other tools
Apr 13, 2025 am 09:42 AM
The readdir function in the Debian system is a system call used to read directory contents and is often used in C programming. This article will explain how to integrate readdir with other tools to enhance its functionality.
Method 1: Combining C language programs and pipelines
First, write a C program to call the readdir function and output the result:
#include<stdio.h>
#include<stdlib.h>
#include<dirent.h>
int main(int argc, char *argv[]) {
DIR *dir;
struct dirent *entry;
if (argc != 2) {
fprintf(stderr, "Usage: %s<directory> \n", argv[0]);
return EXIT_FAILURE;
}
dir = opendir(argv[1]);
if (dir == NULL) {
perror("opendir");
return EXIT_FAILURE;
}
while ((entry = readdir(dir)) != NULL) {
printf("%s\n", entry->d_name);
}
closedir(dir);
return EXIT_SUCCESS;
}</directory></dirent.h></stdlib.h></stdio.h>
Compile the program (assuming the file name is readdir_example.c ): gcc -o readdir_example readdir_example.c
Then, use a pipeline to pass the output to other tools, such as grep :
./readdir_example /path/to/directory | grep "\.txt$"
This will only display files ending in .txt under the /path/to/directory directory.
Method 2: Shell script automation
Create a shell script (for example process_directory.sh ):
#!/bin/bash
if [ $# -ne 1 ]; then
echo "Usage: $0<directory> "
exit 1
fi
for file in $(./readdir_example "$1"); do
echo "Processing: $file"
#Add the actions you want to perform on each file here, for example:
# if [ -f "$file" ]; then # Check if it is a file# echo "$file is a file"
# fi
done</directory>
Grant script execution permissions: chmod x process_directory.sh
Run the script: ./process_directory.sh /path/to/directory
Method 3: Python scripts
Using Python can more conveniently handle the output of readdir :
import os
import sys
def list_directory(path):
for entry in os.listdir(path):
print(entry)
if __name__ == "__main__":
if len(sys.argv) != 2:
print("Usage: python list_directory.py<directory> ")
sys.exit(1)
list_directory(sys.argv[1])</directory>
Run the script: python list_directory.py /path/to/directory
Through the above methods, you can flexibly integrate readdir with other tools or scripts to achieve more powerful directory operation functions. Remember to replace /path/to/directory as your actual directory path.
The above is the detailed content of How debian readdir integrates with other tools. For more information, please follow other related articles on the PHP Chinese website!
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