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nuttx-apps/examples/stat/stat_main.c

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/****************************************************************************
* examples/stat/stat_main.c
*
* Copyright (C) 2008, 2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/stat.h>
#include <sys/statfs.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
/****************************************************************************
* Private Data
****************************************************************************/
static struct mallinfo g_mmbefore;
static struct mallinfo g_mmprevious;
static struct mallinfo g_mmafter;
/****************************************************************************
* Private Functions
****************************************************************************/
static void showusage(struct mallinfo *mmbefore, struct mallinfo *mmafter)
{
printf("VARIABLE BEFORE AFTER\n");
printf("======== ======== ========\n");
printf("arena %8x %8x\n", mmbefore->arena, mmafter->arena);
printf("ordblks %8d %8d\n", mmbefore->ordblks, mmafter->ordblks);
printf("mxordblk %8x %8x\n", mmbefore->mxordblk, mmafter->mxordblk);
printf("uordblks %8x %8x\n", mmbefore->uordblks, mmafter->uordblks);
printf("fordblks %8x %8x\n", mmbefore->fordblks, mmafter->fordblks);
}
static void stepusage(void)
{
/* Get the current memory usage */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmafter = mallinfo();
#else
(void)mallinfo(&g_mmafter);
#endif
/* Show the change from the previous loop */
printf("\nStep memory usage:\n");
showusage(&g_mmprevious, &g_mmafter);
/* Set up for the next test */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmprevious = g_mmafter;
#else
memcpy(&g_mmprevious, &g_mmafter, sizeof(struct mallinfo));
#endif
}
static void endusage(void)
{
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmafter = mallinfo();
#else
(void)mallinfo(&g_mmafter);
#endif
printf("\nFinal memory usage:\n");
showusage(&g_mmbefore, &g_mmafter);
}
static void dump_stat(FAR struct stat *buf)
{
FAR const char *typename;
if (S_ISLNK(buf->st_mode))
{
typename = "Link";
}
else if (S_ISCHR(buf->st_mode))
{
typename = "Character driver";
}
else if (S_ISDIR(buf->st_mode))
{
typename = "Directory";
}
else if (S_ISBLK(buf->st_mode))
{
typename = "Block driver";
}
else if (S_ISREG(buf->st_mode))
{
typename = "Regular file";
}
else if (S_ISMQ(buf->st_mode))
{
typename = "Message queue";
}
else if (S_ISSEM(buf->st_mode))
{
typename = "Named semaphore";
}
else if (S_ISSHM(buf->st_mode))
{
typename = "Shared memory";
}
else
{
typename = "Unknown file type";
}
printf("\nstat:\n");
printf(" st_mode: %04x\n", buf->st_mode);
printf(" %s\n", typename);
printf(" st_size: %llu\n", (unsigned long long)buf->st_size);
printf(" st_blksize: %lu\n", (unsigned long)buf->st_blksize);
printf(" st_blocks: %lu\n", (unsigned long)buf->st_blocks);
printf(" st_atime: %08lx\n", (unsigned long)buf->st_atime);
printf(" st_mtime: %08lx\n", (unsigned long)buf->st_mtime);
printf(" st_ctime: %08lx\n", (unsigned long)buf->st_ctime);
}
static void dump_statfs(FAR struct statfs *buf)
{
printf("\nstatfs:\n");
printf(" f_type: %lu\n", (unsigned long)buf->f_type);
printf(" f_namelen: %lu\n", (unsigned long)buf->f_namelen);
printf(" f_bsize: %lu\n", (unsigned long)buf->f_bsize);
printf(" f_blocks: %llu\n", (unsigned long long)buf->f_blocks);
printf(" f_bfree: %llu\n", (unsigned long long)buf->f_bfree);
printf(" f_bavail: %llu\n", (unsigned long long)buf->f_bavail);
printf(" f_files: %llu\n", (unsigned long long)buf->f_files);
printf(" f_ffree: %llu\n", (unsigned long long)buf->f_ffree);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* stat_main
****************************************************************************/
#ifdef CONFIG_BUILD_KERNEL
int main(int argc, FAR char *argv[])
#else
int stat_main(int argc, char *argv[])
#endif
{
FAR const char *path;
struct stat statbuf;
struct statfs statfsbuf;
bool isreg;
int ret;
/* Argument is expected... the path to the file to test */
if (argc != 2)
{
fprintf(stderr,
"ERROR: Invalid number of arguments: %d (expected 2)\n",
argc);
return EXIT_FAILURE;
}
path = argv[1];
printf("Testing path: \"%s\"\n", path);
/* Set up memory monitoring */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmbefore = mallinfo();
g_mmprevious = g_mmbefore;
#else
(void)mallinfo(&g_mmbefore);
memcpy(&g_mmprevious, &g_mmbefore, sizeof(struct mallinfo));
#endif
/* Try stat first */
ret = stat(path, &statbuf);
if (ret < 0)
{
int errcode = errno;
fprintf(stderr,
"ERROR: stat(%s) failed: %d\n",
path, errcode);
return EXIT_FAILURE;
}
dump_stat(&statbuf);
stepusage();
isreg = S_ISREG(statbuf.st_mode);
/* Try statfs */
ret = statfs(path, &statfsbuf);
if (ret < 0)
{
int errcode = errno;
fprintf(stderr,
"ERROR: statfs(%s) failed: %d\n",
path, errcode);
}
dump_statfs(&statfsbuf);
stepusage();
/* Try fstat (only if it is a regular file) */
if (isreg)
{
int fd = open(path, O_RDONLY);
if (fd < 0)
{
int errcode = errno;
fprintf(stderr,
"ERROR: open(%s) failed: %d\n",
path, errcode);
return EXIT_FAILURE;
}
stepusage();
ret = fstat(fd, &statbuf);
if (ret < 0)
{
int errcode = errno;
fprintf(stderr,
"ERROR: statfs(%s) failed: %d\n",
path, errcode);
}
else
{
dump_stat(&statbuf);
}
stepusage();
close(fd);
}
endusage();
return 0;
}
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