Fixed a lot of segfaults and bad practices

test.c

@@ -0,0 +1,102 @@
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+
+extern ssize_t ft_write(int fd, const void *buf, size_t count);
+
+extern int ft_strcmp(const char *s1, const char *s2);
+
+extern char *ft_strcpy(char *dest, const char *src);
+
+extern size_t ft_strlen(const char *s);
+
+extern ssize_t ft_read(int fd, void *buf, size_t count); 
+
+extern char *ft_strdup(const char *s);
+
+void Test_read(char *filename, int len)
+{
+    char buffer[100] = {0};
+
+    int fd = open(filename, O_RDONLY);
+    printf("READ : %ld | ", read(fd, buffer, len));
+    printf("%s\n", buffer);
+    close(fd);
+    bzero(buffer, len);
+
+    fd = open(filename, O_RDONLY);
+    printf("READ : %ld | ", ft_read(fd, buffer, len));
+    printf("%s\n", buffer);
+    close(fd);
+}
+
+void Test_write(char *buffer, int len)
+{
+    printf(" | WRITE : %ld\n", write(1, buffer, len));
+    printf(" | WRITE : %ld\n", ft_write(1, buffer, len));
+}
+
+void Test_strdup(char *buffer)
+{
+    char *newbuffer;
+
+    newbuffer = strdup(buffer);
+    printf("STRDUP : %s\n", newbuffer);
+    free(newbuffer);
+
+    newbuffer = ft_strdup(buffer);
+    printf("FT_STRDUP : %s\n", newbuffer);
+    free(newbuffer);
+}
+
+void Test_strlen(char *str)
+{
+    int len = strlen(str);
+    int ft_len = ft_strlen(str);
+
+    printf("STRLEN : %s\n", (len == ft_len) ? "OK" : "KO");
+}
+
+void Test_strcpy(char *buffer)
+{
+    char cpybuffer[strlen(buffer) + 1];
+
+    bzero(cpybuffer, strlen(buffer) + 1);
+    strcpy(cpybuffer, buffer);
+    printf("STRCPY : %s\n", cpybuffer);
+
+    bzero(cpybuffer, strlen(buffer) + 1);
+    ft_strcpy(cpybuffer, buffer);
+    printf("FT_STRCPY : %s\n", cpybuffer);
+}
+
+void Test_strcmp(char *str1, char *str2)
+{
+    int res1 = strcmp(str1, str2);
+    int res2 = ft_strcmp(str1, str2);
+
+    printf("STRCMP : %d FT_STRCMP : %d | %s\n", res1, res2, (res1 == res2) ? "OK" : "KO");
+}
+
+int main()
+{
+    int returnval[2];
+    int fd = open("mauvaisdavid.txt", O_RDONLY);
+    char buffer[100] = {0};
+
+    Test_strlen("clafete");
+
+    Test_read("mauvaisdavid.txt", 15);
+
+    Test_write("youpipouic", 10);
+
+    Test_strcpy("jesuislevilainbebe");
+
+    Test_strdup("youpilolololol");
+
+    Test_strcmp("vilain", "vilain");
+}