<pre>Hey, I just ran through this post, and since no solution was posted, here's a piece of code that i had written Infact when i wrote this i wanted both the device name and also the file system on that partition. But for this, one needs the root privileges. #include<stdio.h> #include<stdlib.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include<assert.h> #include<blkid/blkid.h> int main(int argc,char *argv[]) { struct blkid_struct_dev *dev; struct blkid_struct_cache *cache; char *type,*dev_name; struct stat buf; assert(argc == 2); assert(argv[1]); assert(lstat(argv[1],&buf) == 0); dev_name=blkid_devno_to_devname(buf.st_dev); assert(dev_name); printf("Device name :%s\n",dev_name); assert(blkid_get_cache(&cache,"/dev/null") == 0); dev = (struct blkid_struct_dev *)blkid_get_dev(cache,dev_name, BLKID_DEV_NORMAL); assert(dev); type = blkid_get_tag_value(cache,"TYPE",dev_name); printf("File System type is : %s\n",type); blkid_free_dev(dev); return (0); } You have to compile it with the libblkid. Do man for libblkid, that should be really helpful. -Smit Shah. --- On Thu, 20/3/08, liuyue <liuyue ncic ac cn> wrote: > From: liuyue <liuyue ncic ac cn> > Subject: Re: How to get device name with device id? > To: "ashitpro yahoo co in" <ashitpro yahoo co in>, "ext3-users redhat com" <ext3-users redhat com> > Date: Thursday, 20 March, 2008, 4:34 PM > ashish mahamuni, > > I guess maybe the following function does what you want. > But it is a kernel function, sorry :( > > int __file_to_disk (char * file_name, char *disk_name) { > int err = 0; > struct nameidata nd; > struct super_block * sb; > struct vfsmount *mnt; > err = path_lookup(file_name, LOOKUP_FOLLOW, > &nd); > if(err){ > DCFS3_ERROR("error to parse the file > name, %s\n", file_name); > goto exit; > } > mnt = nd.mnt; > sb = mnt->mnt_sb; > strcpy (disk_name, > sb->s_bdev->bd_disk->disk_name); > path_release(&nd); > exit: > return err; > } > > ======= 2008-03-20 19:21:04 > 您在来信中写道：======= > > >Hi all, > > > >I want to open a device(/dev/sda1, /dev/hda2 etc) in > which my file exists. > >I've used 'stat' system call to get the > device id. > > > >But now I want the device name from this id(st_dev). > >How to get that one? > >Or > >Do you have any other method to know the device name > where my file resides? > > > >Thanks > > > > > > Bollywood, fun, friendship, sports and more. You > name it, we have it on <a rel="nofollow" href="http://in.promos.yahoo.com/groups">http://in.promos.yahoo.com/groups</a> > > > > > >_______________________________________________ > >Ext3-users mailing list > >Ext3-users redhat com > ><a rel="nofollow" href="https://www.redhat.com/mailman/listinfo/ext3-users">https://www.redhat.com/mailman/listinfo/ext3-users</a> > > > > > > = = = = = = = = = = = = = = = = = = = = > > > 　　　　　　　　致 > 礼！ > > > 　　　　　　　　liuyue > 　　　　　　　　liuyue ncic ac cn > 　　　　　　　　　　2008-03-20 </pre>