stat.c

klibc精简化的c程序库

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <sys/types.h>

static void do_stat(const char *path)
{
	struct stat st;

	if (stat(path, &st)) {
		perror(path);
		exit(1);
	}

	printf("Path = %s\n"
	       "   st_dev       = %#jx (%u,%u)\n"
	       "   st_ino       = %ju\n"
	       "   st_mode      = %#jo\n"
	       "   st_nlink     = %ju\n"
	       "   st_uid       = %ju\n"
	       "   st_gid       = %ju\n"
	       "   st_rdev      = %#jx (%u,%u)\n"
	       "   st_size      = %ju\n"
	       "   st_blksize   = %ju\n"
	       "   st_blocks    = %ju\n",
	       path,
	       (uintmax_t) st.st_dev, major(st.st_dev), minor(st.st_dev),
	       (uintmax_t) st.st_ino,
	       (uintmax_t) st.st_mode,
	       (uintmax_t) st.st_nlink,
	       (uintmax_t) st.st_uid,
	       (uintmax_t) st.st_gid,
	       (uintmax_t) st.st_rdev, major(st.st_rdev), minor(st.st_rdev),
	       (uintmax_t) st.st_size,
	       (uintmax_t) st.st_blksize, (uintmax_t) st.st_blocks);

#ifdef _STATBUF_ST_NSEC
	printf("   st_atim      = %jd.%09u\n"
	       "   st.mtim      = %jd.%09u\n"
	       "   st.ctim      = %jd.%09u\n",
	       (uintmax_t) st.st_atim.tv_sec, (unsigned int)st.st_atim.tv_nsec,
	       (uintmax_t) st.st_mtim.tv_sec, (unsigned int)st.st_mtim.tv_nsec,
	       (uintmax_t) st.st_ctim.tv_sec, (unsigned int)st.st_ctim.tv_nsec);
#else
	printf("   st_atime     = %jd\n"
	       "   st.mtime     = %jd\n"
	       "   st.ctime     = %jd\n",
	       (uintmax_t) st.st_atime,
	       (uintmax_t) st.st_mtime, (uintmax_t) st.st_ctime);
#endif
}

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

	for (i = 1; i < argc; i++)
		do_stat(argv[i]);

	return 0;
}