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Use `u_int64_t' arguments and return value to avoid long int overflows on

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2000-01-20  Martin Baulig  <martin@home-of-linux.org>

	* fsusage.c (adjust_blocks): Use `u_int64_t' arguments and
	return value to avoid long int overflows on machines with large
	disks.

	* fsusage.h (struct fs_usage): Use `u_int64_t' here as well.
This commit is contained in:
Martin Baulig
2000-01-20 21:42:24 +00:00
committed by Martin Baulig
parent 3fa1063b74
commit 8da7cfd032
3 changed files with 25 additions and 16 deletions
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8
sysdeps/common/ChangeLog
View File

@@ -1,3 +1,11 @@
2000-01-20 Martin Baulig <martin@home-of-linux.org>
* fsusage.c (adjust_blocks): Use `u_int64_t' arguments and
return value to avoid long int overflows on machines with large
disks.
* fsusage.h (struct fs_usage): Use `u_int64_t' here as well.
1999-10-24 Martin Baulig <martin@home-of-linux.org>
* fsusage.c (_glibtop_sysdeps_fsusage): New static variable.

23
sysdeps/common/fsusage.c
View File

@@ -82,9 +82,9 @@ int safe_read ();
BLOCKS FROMSIZE-byte blocks, rounding away from zero.
TOSIZE must be positive. Return -1 if FROMSIZE is not positive. */
static long
static u_int64_t
adjust_blocks (blocks, fromsize, tosize)
long blocks;
u_int64_t blocks;
int fromsize, tosize;
{
if (tosize <= 0)
@@ -95,9 +95,9 @@ adjust_blocks (blocks, fromsize, tosize)
if (fromsize == tosize) /* e.g., from 512 to 512 */
return blocks;
else if (fromsize > tosize) /* e.g., from 2048 to 512 */
return blocks * (fromsize / tosize);
return blocks * (u_int64_t)(fromsize / tosize);
else /* e.g., from 256 to 512 */
return (blocks + (blocks < 0 ? -1 : 1)) / (tosize / fromsize);
return (blocks + (blocks < 0 ? -1 : 1)) / (u_int64_t)(tosize / fromsize);
}
/* Fill in the fields of FSP with information about space usage for
@@ -114,7 +114,7 @@ get_fs_usage (path, disk, fsp)
struct fs_usage *fsp;
{
#ifdef STAT_STATFS3_OSF1
# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_fsize, 512)
# define CONVERT_BLOCKS(B) adjust_blocks ((u_int64_t)(B), fsd.f_fsize, 512)
struct statfs fsd;
@@ -124,7 +124,7 @@ get_fs_usage (path, disk, fsp)
#endif /* STAT_STATFS3_OSF1 */
#ifdef STAT_STATFS2_FS_DATA /* Ultrix */
# define CONVERT_BLOCKS(B) adjust_blocks ((B), 1024, 512)
# define CONVERT_BLOCKS(B) adjust_blocks ((u_int64_t)(B), 1024, 512)
struct fs_data fsd;
@@ -143,7 +143,7 @@ get_fs_usage (path, disk, fsp)
# define SUPERBOFF (SUPERB * 512)
# endif
# define CONVERT_BLOCKS(B) \
adjust_blocks ((B), (fsd.s_type == Fs2b ? 1024 : 512), 512)
adjust_blocks ((u_int64_t)(B), (fsd.s_type == Fs2b ? 1024 : 512), 512)
struct filsys fsd;
int fd;
@@ -173,7 +173,7 @@ get_fs_usage (path, disk, fsp)
#endif /* STAT_READ_FILSYS */
#ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX */
# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_bsize, 512)
# define CONVERT_BLOCKS(B) adjust_blocks ((u_int64_t)(B), fsd.f_bsize, 512)
struct statfs fsd;
@@ -198,7 +198,7 @@ get_fs_usage (path, disk, fsp)
#endif /* STAT_STATFS2_BSIZE */
#ifdef STAT_STATFS2_FSIZE /* 4.4BSD */
# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_fsize, 512)
# define CONVERT_BLOCKS(B) adjust_blocks ((u_int64_t)(B), fsd.f_fsize, 512)
struct statfs fsd;
@@ -209,7 +209,7 @@ get_fs_usage (path, disk, fsp)
#ifdef STAT_STATFS4 /* SVR3, Dynix, Irix, AIX */
# if _AIX || defined(_CRAY)
# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_bsize, 512)
# define CONVERT_BLOCKS(B) adjust_blocks ((u_int64_t)(B), fsd.f_bsize, 512)
# ifdef _CRAY
# define f_bavail f_bfree
# endif
@@ -234,7 +234,7 @@ get_fs_usage (path, disk, fsp)
#ifdef STAT_STATVFS /* SVR4 */
# define CONVERT_BLOCKS(B) \
adjust_blocks ((B), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
adjust_blocks ((u_int64_t)(B), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
struct statvfs fsd;
@@ -296,6 +296,7 @@ glibtop_get_fsusage_s (glibtop *server, glibtop_fsusage *buf,
glibtop_init_r (&server, 0, 0);
memset (buf, 0, sizeof (glibtop_fsusage));
memset (&fsp, 0, sizeof (struct fs_usage));
if (get_fs_usage (disk, disk, &fsp))
return -1;

10
sysdeps/common/fsusage.h
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@@ -20,10 +20,10 @@
/* Space usage statistics for a filesystem. Blocks are 512-byte. */
struct fs_usage
{
long fsu_blocks; /* Total blocks. */
long fsu_bfree; /* Free blocks available to superuser. */
long fsu_bavail; /* Free blocks available to non-superuser. */
long fsu_files; /* Total file nodes. */
long fsu_ffree; /* Free file nodes. */
u_int64_t fsu_blocks; /* Total blocks. */
u_int64_t fsu_bfree; /* Free blocks available to superuser. */
u_int64_t fsu_bavail; /* Free blocks available to non-superuser. */
u_int64_t fsu_files; /* Total file nodes. */
u_int64_t fsu_ffree; /* Free file nodes. */
};