tkt

SCR3.1/TP2/Ex4/Comparaison.c

@@ -0,0 +1,74 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <errno.h>
+
+#define BUFFER_SIZE 4096
+
+int main(int argc, char *argv[]) {
+    if (argc != 3) {
+        fprintf(stderr, "Usage: %s <file1> <file2>\n", argv[0]);
+        return 1;
+    }
+
+    const char *file1 = argv[1];
+    const char *file2 = argv[2];
+
+    struct stat stat1, stat2;
+
+    if (stat(file1, &stat1) == -1) {
+        perror("Erreur stat file1");
+        return 1;
+    }
+
+    if (stat(file2, &stat2) == -1) {
+        perror("Erreur stat file2");
+        return 1;
+    }
+
+    if (stat1.st_size != stat2.st_size) {
+        return 1; 
+    }
+
+    int fd1 = open(file1, O_RDONLY);
+    if (fd1 == -1) {
+        perror("Erreur open file1");
+        return 1;
+    }
+
+    int fd2 = open(file2, O_RDONLY);
+    if (fd2 == -1) {
+        perror("Erreur open file2");
+        close(fd1);
+        return 1;
+    }
+
+    char buffer1[BUFFER_SIZE];
+    char buffer2[BUFFER_SIZE];
+    ssize_t bytes_read1, bytes_read2;
+
+    while ((bytes_read1 = read(fd1, buffer1, BUFFER_SIZE)) > 0) {
+        bytes_read2 = read(fd2, buffer2, BUFFER_SIZE);
+
+        if (bytes_read2 != bytes_read1 || memcmp(buffer1, buffer2, bytes_read1) != 0) {
+            close(fd1);
+            close(fd2);
+            return 1; 
+        }
+    }
+
+    if (bytes_read1 == -1) {
+        perror("Erreur lecture file1");
+        close(fd1);
+        close(fd2);
+        return 1;
+    }
+
+    close(fd1);
+    close(fd2);
+
+    return 0;
+}