test-statx.c
/* Test the statx() system call.
*
* Note that the output of this program is intended to look like the output of
* /bin/stat where possible.
*
* Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#define _GNU_SOURCE
#define _ATFILE_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <time.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <sys/stat.h>
#define AT_STATX_SYNC_TYPE 0x6000
#define AT_STATX_SYNC_AS_STAT 0x0000
#define AT_STATX_FORCE_SYNC 0x2000
#define AT_STATX_DONT_SYNC 0x4000
static __attribute__((unused))
ssize_t statx(int dfd, const char *filename, unsigned flags,
unsigned int mask, struct statx *buffer)
{
return syscall(__NR_statx, dfd, filename, flags, mask, buffer);
}
static void print_time(const char *field, struct statx_timestamp *ts)
{
struct tm tm;
time_t tim;
char buffer[100];
int len;
tim = ts->tv_sec;
if (!localtime_r(&tim, &tm)) {
perror("localtime_r");
exit(1);
}
len = strftime(buffer, 100, "%F %T", &tm);
if (len == 0) {
perror("strftime");
exit(1);
}
printf("%s", field);
fwrite(buffer, 1, len, stdout);
printf(".%09u", ts->tv_nsec);
len = strftime(buffer, 100, "%z", &tm);
if (len == 0) {
perror("strftime2");
exit(1);
}
fwrite(buffer, 1, len, stdout);
printf("\n");
}
static void dump_statx(struct statx *stx)
{
char buffer[256], ft = '?';
printf("results=%x\n", stx->stx_mask);
printf(" ");
if (stx->stx_mask & STATX_SIZE)
printf(" Size: %-15llu", (unsigned long long)stx->stx_size);
if (stx->stx_mask & STATX_BLOCKS)
printf(" Blocks: %-10llu", (unsigned long long)stx->stx_blocks);
printf(" IO Block: %-6llu", (unsigned long long)stx->stx_blksize);
if (stx->stx_mask & STATX_TYPE) {
switch (stx->stx_mode & S_IFMT) {
case S_IFIFO: printf(" FIFO\n"); ft = 'p'; break;
case S_IFCHR: printf(" character special file\n"); ft = 'c'; break;
case S_IFDIR: printf(" directory\n"); ft = 'd'; break;
case S_IFBLK: printf(" block special file\n"); ft = 'b'; break;
case S_IFREG: printf(" regular file\n"); ft = '-'; break;
case S_IFLNK: printf(" symbolic link\n"); ft = 'l'; break;
case S_IFSOCK: printf(" socket\n"); ft = 's'; break;
default:
printf(" unknown type (%o)\n", stx->stx_mode & S_IFMT);
break;
}
} else {
printf(" no type\n");
}
sprintf(buffer, "%02x:%02x", stx->stx_dev_major, stx->stx_dev_minor);
printf("Device: %-15s", buffer);
if (stx->stx_mask & STATX_INO)
printf(" Inode: %-11llu", (unsigned long long) stx->stx_ino);
if (stx->stx_mask & STATX_NLINK)
printf(" Links: %-5u", stx->stx_nlink);
if (stx->stx_mask & STATX_TYPE) {
switch (stx->stx_mode & S_IFMT) {
case S_IFBLK:
case S_IFCHR:
printf(" Device type: %u,%u",
stx->stx_rdev_major, stx->stx_rdev_minor);
break;
}
}
printf("\n");
if (stx->stx_mask & STATX_MODE)
printf("Access: (%04o/%c%c%c%c%c%c%c%c%c%c) ",
stx->stx_mode & 07777,
ft,
stx->stx_mode & S_IRUSR ? 'r' : '-',
stx->stx_mode & S_IWUSR ? 'w' : '-',
stx->stx_mode & S_IXUSR ? 'x' : '-',
stx->stx_mode & S_IRGRP ? 'r' : '-',
stx->stx_mode & S_IWGRP ? 'w' : '-',
stx->stx_mode & S_IXGRP ? 'x' : '-',
stx->stx_mode & S_IROTH ? 'r' : '-',
stx->stx_mode & S_IWOTH ? 'w' : '-',
stx->stx_mode & S_IXOTH ? 'x' : '-');
if (stx->stx_mask & STATX_UID)
printf("Uid: %5d ", stx->stx_uid);
if (stx->stx_mask & STATX_GID)
printf("Gid: %5d\n", stx->stx_gid);
if (stx->stx_mask & STATX_ATIME)
print_time("Access: ", &stx->stx_atime);
if (stx->stx_mask & STATX_MTIME)
print_time("Modify: ", &stx->stx_mtime);
if (stx->stx_mask & STATX_CTIME)
print_time("Change: ", &stx->stx_ctime);
if (stx->stx_mask & STATX_BTIME)
print_time(" Birth: ", &stx->stx_btime);
if (stx->stx_attributes_mask) {
unsigned char bits, mbits;
int loop, byte;
static char attr_representation[64 + 1] =
/* STATX_ATTR_ flags: */
"????????" /* 63-56 */
"????????" /* 55-48 */
"????????" /* 47-40 */
"????????" /* 39-32 */
"????????" /* 31-24 0x00000000-ff000000 */
"????????" /* 23-16 0x00000000-00ff0000 */
"???me???" /* 15- 8 0x00000000-0000ff00 */
"?dai?c??" /* 7- 0 0x00000000-000000ff */
;
printf("Attributes: %016llx (", stx->stx_attributes);
for (byte = 64 - 8; byte >= 0; byte -= 8) {
bits = stx->stx_attributes >> byte;
mbits = stx->stx_attributes_mask >> byte;
for (loop = 7; loop >= 0; loop--) {
int bit = byte + loop;
if (!(mbits & 0x80))
putchar('.'); /* Not supported */
else if (bits & 0x80)
putchar(attr_representation[63 - bit]);
else
putchar('-'); /* Not set */
bits <<= 1;
mbits <<= 1;
}
if (byte)
putchar(' ');
}
printf(")\n");
}
}
static void dump_hex(unsigned long long *data, int from, int to)
{
unsigned offset, print_offset = 1, col = 0;
from /= 8;
to = (to + 7) / 8;
for (offset = from; offset < to; offset++) {
if (print_offset) {
printf("%04x: ", offset * 8);
print_offset = 0;
}
printf("%016llx", data[offset]);
col++;
if ((col & 3) == 0) {
printf("\n");
print_offset = 1;
} else {
printf(" ");
}
}
if (!print_offset)
printf("\n");
}
int main(int argc, char **argv)
{
struct statx stx;
int ret, raw = 0, atflag = AT_SYMLINK_NOFOLLOW;
unsigned int mask = STATX_ALL;
for (argv++; *argv; argv++) {
if (strcmp(*argv, "-F") == 0) {
atflag &= ~AT_STATX_SYNC_TYPE;
atflag |= AT_STATX_FORCE_SYNC;
continue;
}
if (strcmp(*argv, "-D") == 0) {
atflag &= ~AT_STATX_SYNC_TYPE;
atflag |= AT_STATX_DONT_SYNC;
continue;
}
if (strcmp(*argv, "-L") == 0) {
atflag &= ~AT_SYMLINK_NOFOLLOW;
continue;
}
if (strcmp(*argv, "-O") == 0) {
mask &= ~STATX_BASIC_STATS;
continue;
}
if (strcmp(*argv, "-A") == 0) {
atflag |= AT_NO_AUTOMOUNT;
continue;
}
if (strcmp(*argv, "-R") == 0) {
raw = 1;
continue;
}
memset(&stx, 0xbf, sizeof(stx));
ret = statx(AT_FDCWD, *argv, atflag, mask, &stx);
printf("statx(%s) = %d\n", *argv, ret);
if (ret < 0) {
perror(*argv);
exit(1);
}
if (raw)
dump_hex((unsigned long long *)&stx, 0, sizeof(stx));
dump_statx(&stx);
}
return 0;
}
