zap.c

apue第二版每一章节的c语言源码

#include	<sys/types.h>
#include	<sys/stat.h>
#include	<fcntl.h>
#include	<utime.h>
#include	"ourhdr.h"

int
main(int argc, char *argv[])
{
	int				i;
	struct stat		statbuf;
	struct utimbuf	timebuf;

	for (i = 1; i < argc; i++) {
		if (stat(argv[i], &statbuf) < 0) {	/* fetch current times */
			err_ret("%s: stat error", argv[i]);
			continue;
		}
		if (open(argv[i], O_RDWR | O_TRUNC) < 0) {	/* truncate */
			err_ret("%s: open error", argv[i]);
			continue;
		}
		timebuf.actime  = statbuf.st_atime;
		timebuf.modtime = statbuf.st_mtime;
		if (utime(argv[i], &timebuf) < 0) {		/* reset times */
			err_ret("%s: utime error", argv[i]);
			continue;
		}
	}
	exit(0);
}