filetype.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>
#include	<sys/stat.h>
#include	"ourhdr.h"

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

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

		if      (S_ISREG(buf.st_mode))	ptr = "regular";
		else if (S_ISDIR(buf.st_mode))	ptr = "directory";
		else if (S_ISCHR(buf.st_mode))	ptr = "character special";
		else if (S_ISBLK(buf.st_mode))	ptr = "block special";
		else if (S_ISFIFO(buf.st_mode))	ptr = "fifo";
#ifdef	S_ISLNK
		else if (S_ISLNK(buf.st_mode))	ptr = "symbolic link";
#endif
#ifdef	S_ISSOCK
		else if (S_ISSOCK(buf.st_mode))	ptr = "socket";
#endif
		else				ptr = "** unknown mode **";
		printf("%s\n", ptr);
	}
	exit(0);
}