这是安全的吗? fgets
是否终止缓冲区为空,或者我应该在调用fgets
之后,还是在拨打clean
之前将第20个字节设置为空?fgets()总是空终止它返回的字符串吗?
// strip new lines
void clean(char *data)
{
while (*data)
{
if (*data == '\n' || *data == '\r') *data = '\0';
data++;
}
}
// for this, assume that the file contains 1 line no longer than 19 bytes
// buffer is freed elsewhere
char *load_latest_info(char *file)
{
FILE *f;
char *buffer = (char*) malloc(20);
if (f = fopen(file, "r"))
if (fgets(buffer, 20, f))
{
clean(buffer);
return buffer;
}
free(buffer);
return NULL;
}