X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ffsusage.c;h=d60a4c6a73f7981ea7b3457fcd24720392e7d397;hb=880bff095c4a832c6ca0e899485da94a2fa34758;hp=b434913439e67a5c53af495e94e96ef0c240cb1d;hpb=b06578954912a7dcfbe0c6f6efca230b04ad0e7f;p=gnulib.git

diff --git a/lib/fsusage.c b/lib/fsusage.c
index b43491343..d60a4c6a7 100644
--- a/lib/fsusage.c
+++ b/lib/fsusage.c
@@ -15,11 +15,27 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+#ifdef HAVE_CONFIG_H
+#if defined (CONFIG_BROKETS)
+/* We use <config.h> instead of "config.h" so that a compilation
+   using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
+   (which it would do because it found this file in $srcdir).  */
+#include <config.h>
+#else
+#include "config.h"
+#endif
+#endif
+
 #include <sys/types.h>
 #include "fsusage.h"
+#include "safe-stat.h"
 
 int statfs ();
 
+#if defined (STAT_STATFS3_OSF1)	/* DEC Alpha running OSF/1 */
+#  include <sys/mount.h>
+#endif
+
 #if defined(STAT_STATFS2_BSIZE) && !defined(_IBMR2) /* 4.3BSD, SunOS 4, HP-UX, AIX PS/2.  */
 #include <sys/vfs.h>
 #endif
@@ -54,19 +70,25 @@ int statvfs ();
 #endif
 
 /* Return the number of TOSIZE-byte blocks used by
-   BLOCKS FROMSIZE-byte blocks, rounding up.  */
+   BLOCKS FROMSIZE-byte blocks, rounding away from zero.
+   TOSIZE must be positive.  Return -1 if FROMSIZE is not positive.  */
 
 static long
 adjust_blocks (blocks, fromsize, tosize)
      long blocks;
      int fromsize, tosize;
 {
+  if (tosize <= 0)
+    abort ();
+  if (fromsize <= 0)
+    return -1;
+								    
   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);
   else				/* E.g., from 256 to 512.  */
-    return (blocks + 1) / (tosize / fromsize);
+    return (blocks + (blocks < 0 ? -1 : 1)) / (tosize / fromsize);
 }
 
 /* Fill in the fields of FSP with information about space usage for
@@ -80,15 +102,23 @@ get_fs_usage (path, disk, fsp)
      char *path, *disk;
      struct fs_usage *fsp;
 {
+#if defined (STAT_STATFS3_OSF1)
+  struct statfs fsd;
+
+  if (statfs (path, &fsd, sizeof (struct statfs)) != 0)
+    return -1;
+#define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_fsize, 512)
+#endif /* STAT_STATFS3_OSF1 */
+
 #ifdef STAT_STATFS2_FS_DATA	/* Ultrix.  */
   struct fs_data fsd;
 
   if (statfs (path, &fsd) != 1)
     return -1;
-#define convert_blocks(b) adjust_blocks ((b), 1024, 512)
-  fsp->fsu_blocks = convert_blocks (fsd.fd_req.btot);
-  fsp->fsu_bfree = convert_blocks (fsd.fd_req.bfree);
-  fsp->fsu_bavail = convert_blocks (fsd.fd_req.bfreen);
+#define CONVERT_BLOCKS(b) adjust_blocks ((b), 1024, 512)
+  fsp->fsu_blocks = CONVERT_BLOCKS (fsd.fd_req.btot);
+  fsp->fsu_bfree = CONVERT_BLOCKS (fsd.fd_req.bfree);
+  fsp->fsu_bavail = CONVERT_BLOCKS (fsd.fd_req.bfreen);
   fsp->fsu_files = fsd.fd_req.gtot;
   fsp->fsu_ffree = fsd.fd_req.gfree;
 #endif
@@ -110,10 +140,10 @@ get_fs_usage (path, disk, fsp)
       return -1;
     }
   close (fd);
-#define convert_blocks(b) adjust_blocks ((b), (fsd.s_type == Fs2b ? 1024 : 512), 512)
-  fsp->fsu_blocks = convert_blocks (fsd.s_fsize);
-  fsp->fsu_bfree = convert_blocks (fsd.s_tfree);
-  fsp->fsu_bavail = convert_blocks (fsd.s_tfree);
+#define CONVERT_BLOCKS(b) adjust_blocks ((b), (fsd.s_type == Fs2b ? 1024 : 512), 512)
+  fsp->fsu_blocks = CONVERT_BLOCKS (fsd.s_fsize);
+  fsp->fsu_bfree = CONVERT_BLOCKS (fsd.s_tfree);
+  fsp->fsu_bavail = CONVERT_BLOCKS (fsd.s_tfree);
   fsp->fsu_files = (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1);
   fsp->fsu_ffree = fsd.s_tinode;
 #endif
@@ -123,7 +153,7 @@ get_fs_usage (path, disk, fsp)
 
   if (statfs (path, &fsd) < 0)
     return -1;
-#define convert_blocks(b) adjust_blocks ((b), fsd.f_bsize, 512)
+#define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
 #endif
 
 #ifdef STAT_STATFS2_FSIZE	/* 4.4BSD.  */
@@ -131,7 +161,7 @@ get_fs_usage (path, disk, fsp)
 
   if (statfs (path, &fsd) < 0)
     return -1;
-#define convert_blocks(b) adjust_blocks ((b), fsd.f_fsize, 512)
+#define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_fsize, 512)
 #endif
 
 #ifdef STAT_STATFS4		/* SVR3, Dynix, Irix.  */
@@ -142,11 +172,13 @@ get_fs_usage (path, disk, fsp)
   /* Empirically, the block counts on most SVR3 and SVR3-derived
      systems seem to always be in terms of 512-byte blocks,
      no matter what value f_bsize has.  */
-#define convert_blocks(b) (b)
+#define CONVERT_BLOCKS(b) (b)
 #ifndef _SEQUENT_		/* _SEQUENT_ is DYNIX/ptx.  */
+#ifndef DOLPHIN			/* DOLPHIN 3.8.alfa/7.18 has f_bavail */
 #define f_bavail f_bfree
 #endif
 #endif
+#endif
 
 #ifdef STAT_STATVFS		/* SVR4.  */
   struct statvfs fsd;
@@ -154,14 +186,14 @@ get_fs_usage (path, disk, fsp)
   if (statvfs (path, &fsd) < 0)
     return -1;
   /* f_frsize isn't guaranteed to be supported.  */
-#define convert_blocks(b) \
+#define CONVERT_BLOCKS(b) \
   adjust_blocks ((b), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
 #endif
 
 #if !defined(STAT_STATFS2_FS_DATA) && !defined(STAT_READ) /* !Ultrix && !SVR2.  */
-  fsp->fsu_blocks = convert_blocks (fsd.f_blocks);
-  fsp->fsu_bfree = convert_blocks (fsd.f_bfree);
-  fsp->fsu_bavail = convert_blocks (fsd.f_bavail);
+  fsp->fsu_blocks = CONVERT_BLOCKS (fsd.f_blocks);
+  fsp->fsu_bfree = CONVERT_BLOCKS (fsd.f_bfree);
+  fsp->fsu_bavail = CONVERT_BLOCKS (fsd.f_bavail);
   fsp->fsu_files = fsd.f_files;
   fsp->fsu_ffree = fsd.f_ffree;
 #endif
@@ -180,7 +212,7 @@ statfs (path, fsb)
   struct stat stats;
   struct dustat fsd;
 
-  if (stat (path, &stats))
+  if (SAFE_STAT (path, &stats))
     return -1;
   if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
     return -1;