storage_util.cpp

270的linux说明

/*

Copyright (c) 2008, Intel Corporation. 

All rights reserved.

 

Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:


    * Redistributions of source code must retain the above copyright notice, 
this list of conditions and the following disclaimer.

    * 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.

    * Neither the name of Intel Corporation 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.

*/

#include <sys/vfs.h>
#include <mntent.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <stdio.h> 
#include <errno.h>
#include <string.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <string>
using namespace std;

#include "storage_util.h"

int FindRealRootDeviceName(char *dev_name)
{
	    struct dirent *ent;
	    struct stat stat_buf, root_stat;
	    char *file_name = NULL;
	    dev_t dev;
	    DIR *directory;

	    if (stat("/", &root_stat) != 0)
			goto finddone;
	    else {
	        /* This check is here in case they pass in /dev name */
	        if ((root_stat.st_mode & S_IFMT) == S_IFBLK)
   		         dev = root_stat.st_rdev;
	        else
	            dev = root_stat.st_dev;
	        directory = opendir("/dev");
	        if (!directory)
				goto finddone;
	        else {
	            while((ent = readdir(directory)) != NULL) {
	                const char *my_name = ent->d_name;
	                if (my_name[0] == '.' && my_name[1] == '.' && !my_name[2])
		                    continue;
   		             if (strcmp(my_name, "root")==0)
		                    continue;
	                //file_name = strcat("/dev/", my_name);
					 file_name = malloc(256);
					sprintf(file_name, "%s%s", "/dev/", my_name);

					 if (stat(file_name, &stat_buf) == 0 &&
	                         S_ISBLK(stat_buf.st_mode)!=0 &&
	                         stat_buf.st_rdev == dev)
		                     break;
	                 free(file_name);
	                 file_name=NULL;
		        }
		        closedir(directory);
		    }
		}
finddone:
		    if(file_name==NULL)
			{
				        file_name = strdup("/dev/root");
						strcpy(dev_name, file_name);
						free(file_name);
						return -1;
			}
			else
			{
				strcpy(dev_name, file_name);
				free(file_name);
				return 0;
			}
}


int init_store_info(store_info_t* pinfo, struct mntent *e)
{
	struct statfs s;
	char dev_name[256];
	unsigned long long size;

	memset(pinfo, 0 , sizeof(store_info_t));
	strncpy(pinfo->mount_dir, e->mnt_dir, 256);

	strcpy(dev_name, e->mnt_fsname);

	//find the real device
	if(!strncmp(e->mnt_fsname, "/dev/root", 9))
	{
		FindRealRootDeviceName(dev_name);
	}

	//interface
	if(!strncmp(dev_name, INTERNAL_PREFIX_I519, 7) ||
		   !strncmp(dev_name, INTERNAL_PREFIX_Z, 8))
	{
		pinfo->interface = INTERNAL;
		pinfo->valid = 1;
	}
	else if(!strncmp(dev_name, SD_PREFIX, 8))
	{
		pinfo->interface = SD;
		pinfo->valid = 1;
	}
	else if(!strncmp(dev_name, CF_PREFIX, 7))
	{
		pinfo->interface = CF;
		pinfo->valid = 1;
	}
	else if(!strncmp(dev_name, HD_PREFIX, 7))
	{
		pinfo->interface = HD;
		pinfo->valid = 1;
	}
	else
	{
		pinfo->interface = UNKNOWN_INTERFACE;
		pinfo->valid = 0;
	}
	strncpy(pinfo->name, dev_name, 256);

	//access
	if(!strncmp(e->mnt_opts, "ro", 2))
		pinfo->access = RO;
	else if(!strncmp(e->mnt_opts, "rw", 2))
		pinfo->access = RW;
	else
		pinfo->access = UNKNOWN_ACCESS;

	//file system type
	if(!strncmp(e->mnt_type, "jffs2", 5))
		pinfo->fs_type = JJFS;
	else if(!strncmp(e->mnt_type, "ext2", 4))
		pinfo->fs_type = EXT2FS;
	else if(!strncmp(e->mnt_type, "ext3", 4))
		pinfo->fs_type = EXT3FS;
	else if(!strncmp(e->mnt_type, "vfat", 4))
		pinfo->fs_type = VFATFS;
	else
		pinfo->fs_type = UNKNOWN_FS;

	//capacity
	if(statfs(e->mnt_dir,&s) < 0)
	   return -1;

	size = ((s.f_blocks * (long long )s.f_bsize) + 1024/2 ) / 1024;
	pinfo->capacity = size;
	size = ((s.f_bavail * (long long)s.f_bsize) + 1024/2) / 1024;
	pinfo->free = size;

	return 0;
}

FILE *fp;

int FindStoreInit()
{
	//init mnt table
	fp = setmntent(MNT_TABLE_FILE, "r");
	if(fp == NULL)
		return -1;

	return 0;
}

int FindStoreFini()
{
	endmntent(fp);
}

int FindFirstStore(store_info_t* pinfo)
{
	
	struct mntent *e;
	//get first entry

	if(fp == NULL)
		return -1;

	e = getmntent(fp);
	if(e == NULL)
		return -1;

	//fill the info struct
	init_store_info(pinfo, e);
	
	//done
	return 0;
}

int FindNextStore(store_info_t* pinfo)
{
	struct mntent *e;

	if(fp == NULL)
		return -1;

	e = getmntent(fp);

	if(e == NULL)
		return -1;

	init_store_info(pinfo, e);

	return 0;
}

int GetStore(store_info_t* pinfo, char* name)
{
	struct mntent *e;
	FILE *fp;
	//init mnt table
	fp = setmntent(MNT_TABLE_FILE, "r");
	if(fp == NULL)
		return -1;

	//erase pinfo
	memset(pinfo, 0, sizeof(store_info_t));

	while(1)
	{
		//get first entry
		e = getmntent(fp);
		if(e == NULL)
			goto done;
		init_store_info(pinfo, e);
		if(!strcmp(pinfo->name, name))
		{
			goto done;
		}

		memset(pinfo, 0, sizeof(store_info_t));
	}
done:
	endmntent(fp);
	
	if(pinfo->valid != 0)
		return 0;
	else
		return -1;
}

int IsDisk(store_info_t* pinfo)
{
	return pinfo->valid;
}


bool GetDiskList(list<disk_info_t> &dlist)
{
	//clear the list first
	dlist.clear();

	FILE *procpf;
    char line[256], ptname[256], devname[256], *s;
    int major, minor;
	unsigned long long size;

    procpf = fopen(PROC_PARTITIONS, "r");

	if(procpf == NULL)
	{
		return false;
	}

	while (fgets(line, sizeof(line), procpf)) {
        if (sscanf (line, " %d %d %llu %[^\n ]",
                &major, &minor, &size, ptname) != 4)
			continue;
		for (s = ptname; *s; s++);
		//if the end character is digit, it is a partition
		if (isdigit(s[-1]))
		    continue;
		//this is is disk
		sprintf(devname, "/dev/%s", ptname);
		
		//fill disk_info_t struct
		disk_info_t dinfo;

		strncpy(dinfo.name, devname, 256);

		if(!strncmp(devname, INTERNAL_PREFIX_I519, 7) ||
		   !strncmp(devname, INTERNAL_PREFIX_Z, 8))
		{
			dinfo.interface = INTERNAL;
		}
		else if(!strncmp(devname, SD_PREFIX, 8))
		{
			dinfo.interface = SD;
		}
		else if(!strncmp(devname, CF_PREFIX, 7))
		{
			dinfo.interface = CF;
		}
		else if(!strncmp(devname, HD_PREFIX, 7))
		{
			dinfo.interface = HD;
		}
		else
		{
			dinfo.interface = UNKNOWN_INTERFACE;
		}

		dinfo.capacity = size;

		//nhu: this is low performance
		dlist.push_back(dinfo);
	}

	fclose(procpf);
	return true;
}

bool _InitPartitionInfo(part_info_t *pinfo)
{
	struct mntent *e;
	FILE *fp;
	char dev_name[256];

	//init mnt table
	fp = setmntent(MNT_TABLE_FILE, "r");
	if(fp == NULL)
		return false;

	while((e = getmntent(fp)) != NULL)
	{
		//find the real root path
		strncpy(dev_name, e->mnt_fsname, 256);

		if(!strncmp(e->mnt_fsname, "/dev/root", 9))
		{
			FindRealRootDeviceName(dev_name);
		}

		if(strcmp(dev_name, pinfo->name))
			continue;

		//find the partition in mnt table
		//fill the pinfo struct

		//access
		if(!strncmp(e->mnt_opts, "ro", 2))
			pinfo->access = RO;
		else if(!strncmp(e->mnt_opts, "rw", 2))
			pinfo->access = RW;
		else
			pinfo->access = UNKNOWN_ACCESS;

		//file system type
		if(!strncmp(e->mnt_type, "jffs2", 5))
			pinfo->fs_type = JJFS;
		else if(!strncmp(e->mnt_type, "ext2", 4))
			pinfo->fs_type = EXT2FS;
		else if(!strncmp(e->mnt_type, "ext3", 4))
			pinfo->fs_type = EXT3FS;
		else if(!strncmp(e->mnt_type, "vfat", 4))
			pinfo->fs_type = VFATFS;
		else
			pinfo->fs_type = UNKNOWN_FS;

		//capacity