Linux中gets函数如何安全使用

? Linux ???,gets() ????????????,????????????

1. ?? fgets() ???? gets() ???fgets() ????????????????,??????????????

#include

int main() {
    char buffer[256];
    printf("Enter a string: ");
    fgets(buffer, sizeof(buffer), stdin);
    printf("You entered: %s", buffer);
    return 0;
}

2. ?? getline() ???getline() ?????????????????????,????,????????????????

#include
#include 

int main() {
    char *buffer = NULL;
    size_t len = 0;
    ssize_t read;

    printf("Enter a string: ");
    read = getline(&buffer, &len, stdin);
    if (read != -1) {
        printf("You entered: %s", buffer);
    }

    free(buffer);
    return 0;
}

3. ?? scanf() ???,???? %s ??????????????

#include

int main() {
    char buffer[256];
    printf("Enter a string: ");
    scanf("%5s", buffer); // ??:?????255???256,??C??????????????????'\0'
    printf("You entered: %s", buffer);
    return 0;
}

??,???? gets() ??,????????????,????????????????