cirno/plan9port
1
0
Fork 0
mirror of https://github.com/9fans/plan9port.git synced 2025-01-12 11:10:07 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

display correct size of block devices for linux.

Browse source 
that was surprisingly easy.
This commit is contained in:
rsc 2004-04-25 22:24:56 +00:00
parent 840bb96866
commit 7317e77da3
1 changed files with 29 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

31
src/lib9/_p9dir.c
View file

@ -1,7 +1,6 @@
#include <u.h> #include <u.h>
#define NOPLAN9DEFINES #define NOPLAN9DEFINES
#include <libc.h> #include <libc.h>
#include <sys/types.h> #include <sys/types.h>
#include <sys/stat.h> #include <sys/stat.h>
#include <dirent.h> #include <dirent.h>
@ -43,6 +42,28 @@ isdisk(struct stat *st)
#define _HAVEDISKLABEL #define _HAVEDISKLABEL
#endif #endif
#if defined(__linux__)
#include <linux/hdreg.h>
#include <linux/fs.h>
#include <sys/ioctl.h>
static vlong
disksize(int fd, int dev)
{
u64int u64;
long l;
struct hd_geometry geo;
if(ioctl(fd, BLKGETSIZE64, &u64) >= 0)
return u64;
if(ioctl(fd, BLKGETSIZE, &l) >= 0)
return l*512;
if(ioctl(fd, HDIO_GETGEO, &geo) >= 0)
return (vlong)geo.heads*geo.sectors*geo.cylinders*512;
return 0;
}
#define _HAVEDISKSIZE
#endif
#if !defined(__linux__) && !defined(__sun__) #if !defined(__linux__) && !defined(__sun__)
#define _HAVESTGEN #define _HAVESTGEN
#endif #endif
@ -61,7 +82,7 @@ _p9dir(struct stat *st, char *name, Dir *d, char **str, char *estr)
static struct group *g; static struct group *g;
static struct passwd *p; static struct passwd *p;
static int gid, uid; static int gid, uid;
int sz; int sz, fd;
sz = 0; sz = 0;
if(d) if(d)
@ -154,6 +175,12 @@ _p9dir(struct stat *st, char *name, Dir *d, char **str, char *estr)
} }
/* fetch real size for disks */ /* fetch real size for disks */
#ifdef _HAVEDISKSIZE
if((fd = open(name, O_RDONLY)) >= 0){
d->length = disksize(fd, major(st->st_dev));
close(fd);
}
#endif
#ifdef _HAVEDISKLABEL #ifdef _HAVEDISKLABEL
if(isdisk(st)){ if(isdisk(st)){
int fd, n; int fd, n;