devrdev.c

APUE(第二版)的随书源代码,与第一版的代码相比增加了一些章节的代码(详见第二版的说明)

#include	<sys/types.h>	/* BSD: defines major() and minor() */
#include	<sys/stat.h>
#include	"ourhdr.h"

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

	for (i = 1; i < argc; i++) {
		printf("%s: ", argv[i]);
		if (lstat(argv[i], &buf) < 0) {
			err_ret("lstat error");
			continue;
		}

		printf("dev = %d/%d", major(buf.st_dev),  minor(buf.st_dev));

		if (S_ISCHR(buf.st_mode) || S_ISBLK(buf.st_mode)) {
			printf(" (%s) rdev = %d/%d",
					(S_ISCHR(buf.st_mode)) ? "character" : "block",
					major(buf.st_rdev), minor(buf.st_rdev));
		}
		printf("\n");
	}
	exit(0);
}