free.c

来自「用Ｃ语言编的邮件系统（毕业论文）」· C语言 代码 · 共 25 行

#include	"mail.h"

/* Free up a mail structure, and all the malloc'ed buffers it
 * may point to.  Also close the file descriptors if still open. */

int
_mail_free(MAIL *mail)
{
	if (mail->idxfd >= 0 && close(mail->idxfd) < 0)
		err_dump("index close error");
	if (mail->datfd >= 0 && close(mail->datfd) < 0)
		err_dump("data close error");
	mail->idxfd = mail->datfd = -1;

	if (mail->idxbuf != NULL)
		free(mail->idxbuf);
	if (mail->datbuf != NULL)
		free(mail->datbuf);
	if (mail->name != NULL)
		free(mail->name);
	free(mail);
	return(0);
}