.

[gnulib.git] / lib / fsusage.c

diff --git a/lib/fsusage.c b/lib/fsusage.c
index 503b387..660e33c 100644 (file)
--- a/lib/fsusage.c
+++ b/lib/fsusage.c
@@ -20,8 +20,8 @@
 #endif
 
 #include <sys/types.h>
+#include <sys/stat.h>
 #include "fsusage.h"
-#include "safe-stat.h"
 
 int statfs ();
 
@@ -50,7 +50,6 @@ int statfs ();
 #endif
 
 #ifdef HAVE_DUSTAT_H           /* AIX PS/2.  */
-#include <sys/stat.h>
 #include <sys/dustat.h>
 #endif
 
@@ -59,6 +58,8 @@ int statfs ();
 int statvfs ();
 #endif
 
+int safe_read ();
+
 /* Return the number of TOSIZE-byte blocks used by
    BLOCKS FROMSIZE-byte blocks, rounding away from zero.
    TOSIZE must be positive.  Return -1 if FROMSIZE is not positive.  */
@@ -72,7 +73,7 @@ adjust_blocks (blocks, fromsize, tosize)
     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.  */
@@ -124,7 +125,7 @@ get_fs_usage (path, disk, fsp)
   if (fd < 0)
     return -1;
   lseek (fd, (long) SUPERBOFF, 0);
-  if (read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
+  if (safe_read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
     {
       close (fd);
       return -1;
@@ -143,6 +144,21 @@ get_fs_usage (path, disk, fsp)
 
   if (statfs (path, &fsd) < 0)
     return -1;
+
+#ifdef STATFS_TRUNCATES_BLOCK_COUNTS
+  /* In SunOS 4.1.2, 4.1.3, and 4.1.3_U1, the block counts in the
+     struct statfs are truncated to 2GB.  These conditions detect that
+     truncation, presumably without botching the 4.1.1 case, in which
+     the values are not truncated.  The correct counts are stored in
+     undocumented spare fields.  */
+  if (fsd.f_blocks == 0x1fffff && fsd.f_spare[0] > 0)
+    {
+      fsd.f_blocks = fsd.f_spare[0];
+      fsd.f_bfree = fsd.f_spare[1];
+      fsd.f_bavail = fsd.f_spare[2];
+    }
+#endif /* STATFS_TRUNCATES_BLOCK_COUNTS */
+
 #define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
 #endif
 
@@ -154,7 +170,7 @@ get_fs_usage (path, disk, fsp)
 #define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_fsize, 512)
 #endif
 
-#ifdef STAT_STATFS4            /* SVR3, Dynix, Irix.  */
+#ifdef STAT_STATFS4            /* SVR3, Dynix, Irix, AIX.  */
   struct statfs fsd;
 
   if (statfs (path, &fsd, sizeof fsd, 0) < 0)
@@ -162,15 +178,19 @@ 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)
-#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 HAVE_SYS_STATVFS_H      /* SVR4.  */
+# if _AIX
+#  define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
+# else
+#  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
+#endif
+
+#ifdef STAT_STATVFS            /* SVR4.  */
   struct statvfs fsd;
 
   if (statvfs (path, &fsd) < 0)
@@ -202,7 +222,7 @@ statfs (path, fsb)
   struct stat stats;
   struct dustat fsd;
 
-  if (SAFE_STAT (path, &stats))
+  if (stat (path, &stats))
     return -1;
   if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
     return -1;