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This commit is contained in:
Fabio Scotto di Santolo
2025-07-04 10:39:07 +02:00
parent 2bea38d7fc
commit dd53e83af6
28 changed files with 632 additions and 524 deletions
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112
exercises/mycp/main.c
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@@ -1,69 +1,71 @@
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#define BUFF_LEN 4096
int main(int argc, char *argv[])
{
// Check number of arguments
if (argc < 3) {
fprintf(stderr, "Usage: %s SOURCE DEST\n", argv[0]);
return EXIT_FAILURE;
}
int main(int argc, char *argv[]) {
// Check number of arguments
if (argc < 3) {
fprintf(stderr, "Usage: %s SOURCE DEST\n", argv[0]);
return EXIT_FAILURE;
}
// Get arguments
const char *src = argv[1];
const char *dst = argv[2];
// Get arguments
const char *src = argv[1];
const char *dst = argv[2];
// Open source file in read only mode
int srcfd = open(src, O_RDONLY);
if (srcfd == -1) {
perror("Failed open source file");
return EXIT_FAILURE;
}
// Open source file in read only mode
int srcfd = open(src, O_RDONLY);
if (srcfd == -1) {
perror("Failed open source file");
return EXIT_FAILURE;
}
// Open destination file in write mode, if exists trunc file otherwise create a new file
int dstfd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (dstfd == -1) {
perror("Failed open destination file");
if (close(srcfd) == -1) {
perror("Failed close source file");
}
return EXIT_FAILURE;
}
// Open destination file in write mode, if exists trunc file otherwise
// create a new file
int dstfd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (dstfd == -1) {
perror("Failed open destination file");
if (close(srcfd) == -1) {
perror("Failed close source file");
}
return EXIT_FAILURE;
}
int exit_code = EXIT_SUCCESS;
char buff[BUFF_LEN]; // reading data buffer
ssize_t read_bytes;
while ((read_bytes = read(srcfd, buff, BUFF_LEN)) != 0) {
if (read_bytes == -1) {
// There is an error for reading source file
if (errno == EINTR) continue;
perror("Failed to read source file");
exit_code = EXIT_FAILURE;
break;
}
int exit_code = EXIT_SUCCESS;
char buff[BUFF_LEN]; // reading data buffer
ssize_t read_bytes;
while ((read_bytes = read(srcfd, buff, BUFF_LEN)) != 0) {
if (read_bytes == -1) {
// There is an error for reading source file
if (errno == EINTR)
continue;
perror("Failed to read source file");
exit_code = EXIT_FAILURE;
break;
}
// Write buffer at destination file
if (write(dstfd, buff, read_bytes) == -1) {
perror("Error to write to destination file");
exit_code = EXIT_FAILURE;
break;
}
}
// Write buffer at destination file
if (write(dstfd, buff, read_bytes) == -1) {
perror("Error to write to destination file");
exit_code = EXIT_FAILURE;
break;
}
}
// Try to close files
if (close(srcfd) == -1) {
perror("Failed to close source file");
exit_code = EXIT_FAILURE;
}
if (close(dstfd) == -1) {
perror("Failed to close destination file");
exit_code = EXIT_FAILURE;
}
// Try to close files
if (close(srcfd) == -1) {
perror("Failed to close source file");
exit_code = EXIT_FAILURE;
}
if (close(dstfd) == -1) {
perror("Failed to close destination file");
exit_code = EXIT_FAILURE;
}
return exit_code;
return exit_code;
}

18
exercises/tree/main.c
View File

@@ -1,15 +1,15 @@
#include "tree.h"
#include <stdio.h>
#include <stdlib.h>
#include "tree.h"
int main(int argc, char *argv[]) {
const char *path = (argc > 1) ? argv[1] : ".";
int main(int argc, char *argv[])
{
const char *path = (argc > 1) ? argv[1] : ".";
if (print_tree(path, 0) == -1) {
perror("Error traversing directory");
return EXIT_FAILURE;
}
if (print_tree(path, 0) == -1) {
perror("Error traversing directory");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
return EXIT_SUCCESS;
}

50
exercises/tree/tree.c
View File

@@ -1,35 +1,39 @@
#include "tree.h"
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>
#include "tree.h"
int print_tree(const char *path, int depth) {
DIR *dir = opendir(path);
if (!dir) return -1;
int print_tree(const char *path, int depth)
{
DIR *dir = opendir(path);
if (!dir)
return -1;
struct dirent *entry;
while ((entry = readdir(dir)) != NULL) {
// Skip . and ..
if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
continue;
struct dirent *entry;
while ((entry = readdir(dir)) != NULL) {
// Skip . and ..
if (strcmp(entry->d_name, ".") == 0 ||
strcmp(entry->d_name, "..") == 0)
continue;
for (int i = 0; i < depth; i++) printf(" ");
printf("|-- %s\n", entry->d_name);
for (int i = 0; i < depth; i++)
printf(" ");
printf("|-- %s\n", entry->d_name);
// Construct full path
char full_path[4096];
snprintf(full_path, sizeof(full_path), "%s/%s", path, entry->d_name);
// Construct full path
char full_path[4096];
snprintf(full_path, sizeof(full_path), "%s/%s", path,
entry->d_name);
struct stat st;
if (stat(full_path, &st) == 0 && S_ISDIR(st.st_mode)) {
print_tree(full_path, depth + 1);
}
}
struct stat st;
if (stat(full_path, &st) == 0 && S_ISDIR(st.st_mode)) {
print_tree(full_path, depth + 1);
}
}
closedir(dir);
return 0;
closedir(dir);
return 0;
}

1
exercises/tree/tree.h
View File

@@ -4,4 +4,3 @@
int print_tree(const char *path, int depth);
#endif