sync with glibc and kill dead code to fix issues found by the nftw ltp tests

libc/unistd/pathconf.c

@@ -1,5 +1,5 @@
-/* pathconf -- adjusted for busybox
-   Copyright (C) 1991,95,96,98,99,2000,2001 Free Software Foundation, Inc.
+/* Copyright (C) 1991,1995,1996,1998,2000,2001,2003
+   Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,14 +17,11 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
+/* pathconf -- adjusted for busybox */
 
 /* It would be great it this could be implemented using fpathconf,
  * but that doesn't work out very well (think FIFOs and sockets) */
 
-#include <errno.h>
-#include <unistd.h>
-#include <limits.h>
-#include <sys/statfs.h>
 #include <errno.h>
 #include <stddef.h>
 #include <unistd.h>
@@ -34,219 +31,166 @@
 #include <sys/statfs.h>
 //#include <sys/statvfs.h>
 
-//#include "linux_fsinfo.h"
-
 libc_hidden_proto(statfs)
 libc_hidden_proto(stat)
 
-/* The Linux kernel headers mention this as a kind of generic value.  */
-#define LINUX_LINK_MAX	127
 
-
-/* Get file-specific information about descriptor FD.  */
-long int pathconf(const char *path, int name)
+/* Get file-specific information about PATH.  */
+long int
+pathconf (const char *path, int name)
 {
-    if (path[0] == '\0')
+  if (path[0] == '\0')
     {
-	__set_errno (ENOENT);
-	return -1;
+      __set_errno (ENOENT);
+      return -1;
     }
 
-    if (name == _PC_LINK_MAX)
+  switch (name)
     {
-	/* Cut some corners */
-#if 0
-	struct statfs fsbuf;
-
-	/* Determine the filesystem type.  */
-	if (statfs (path, &fsbuf) < 0)
-	{
-	    if (errno == ENOSYS)
-		/* not possible, return the default value.  */
-		return LINUX_LINK_MAX;
-
-	    /* Some error occured.  */
-	    return -1;
-	}
+    default:
+      __set_errno (EINVAL);
+      return -1;
 
-	switch (fsbuf.f_type)
-	{
-	    case EXT2_SUPER_MAGIC:
-		return EXT2_LINK_MAX;
-
-	    case MINIX_SUPER_MAGIC:
-	    case MINIX_SUPER_MAGIC2:
-		return MINIX_LINK_MAX;
-
-	    case MINIX2_SUPER_MAGIC:
-	    case MINIX2_SUPER_MAGIC2:
-		return MINIX2_LINK_MAX;
-
-	    case XENIX_SUPER_MAGIC:
-		return XENIX_LINK_MAX;
-
-	    case SYSV4_SUPER_MAGIC:
-	    case SYSV2_SUPER_MAGIC:
-		return SYSV_LINK_MAX;
-
-	    case COH_SUPER_MAGIC:
-		return COH_LINK_MAX;
-
-	    case UFS_MAGIC:
-	    case UFS_CIGAM:
-		return UFS_LINK_MAX;
-
-	    case REISERFS_SUPER_MAGIC:
-		return REISERFS_LINK_MAX;
-
-	    default:
-		return LINUX_LINK_MAX;
-	}
+    case _PC_LINK_MAX:
+#ifdef	LINK_MAX
+      return LINK_MAX;
 #else
-	return LINUX_LINK_MAX;
+      return -1;
 #endif
-    }
-
-    switch (name)
-    {
-	default:
-	    __set_errno (EINVAL);
-	    return -1;
 
-	case _PC_MAX_CANON:
+    case _PC_MAX_CANON:
 #ifdef	MAX_CANON
-	    return MAX_CANON;
+      return MAX_CANON;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_MAX_INPUT:
+    case _PC_MAX_INPUT:
 #ifdef	MAX_INPUT
-	    return MAX_INPUT;
+      return MAX_INPUT;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_NAME_MAX:
+    case _PC_NAME_MAX:
 #ifdef	NAME_MAX
-	    {
-		struct statfs buf;
-		int save_errno = errno;
-
-		if (statfs (path, &buf) < 0)
-		{
-		    if (errno == ENOSYS)
-		    {
-			errno = save_errno;
-			return NAME_MAX;
-		    }
-		    return -1;
-		}
-		else
-		{
+      {
+	struct statfs buf;
+	int save_errno = errno;
+
+	if (statfs (path, &buf) < 0)
+	  {
+	    if (errno == ENOSYS)
+	      {
+		errno = save_errno;
+		return NAME_MAX;
+	      }
+	    return -1;
+	  }
+	else
+	  {
 #ifdef _STATFS_F_NAMELEN
-		    return buf.f_namelen;
+	    return buf.f_namelen;
 #else
 # ifdef _STATFS_F_NAME_MAX
-		    return buf.f_name_max;
+	    return buf.f_name_max;
 # else
-		    return NAME_MAX;
+	    return NAME_MAX;
 # endif
 #endif
-		}
-	    }
+	  }
+      }
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_PATH_MAX:
+    case _PC_PATH_MAX:
 #ifdef	PATH_MAX
-	    return PATH_MAX;
+      return PATH_MAX;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_PIPE_BUF:
+    case _PC_PIPE_BUF:
 #ifdef	PIPE_BUF
-	    return PIPE_BUF;
+      return PIPE_BUF;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_CHOWN_RESTRICTED:
+    case _PC_CHOWN_RESTRICTED:
 #ifdef	_POSIX_CHOWN_RESTRICTED
-	    return _POSIX_CHOWN_RESTRICTED;
+      return _POSIX_CHOWN_RESTRICTED;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_NO_TRUNC:
+    case _PC_NO_TRUNC:
 #ifdef	_POSIX_NO_TRUNC
-	    return _POSIX_NO_TRUNC;
+      return _POSIX_NO_TRUNC;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_VDISABLE:
+    case _PC_VDISABLE:
 #ifdef	_POSIX_VDISABLE
-	    return _POSIX_VDISABLE;
+      return _POSIX_VDISABLE;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_SYNC_IO:
+    case _PC_SYNC_IO:
 #ifdef	_POSIX_SYNC_IO
-	    return _POSIX_SYNC_IO;
+      return _POSIX_SYNC_IO;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_ASYNC_IO:
-#if defined _POSIX_ASYNC_IO && defined __UCLIBC_HAS_LFS__ 
-	    {
-		/* AIO is only allowed on regular files and block devices.  */
-		struct stat st;
-
-		if (stat (path, &st) < 0 || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode)))
-		    return -1;
-		else
-		    return 1;
-	    }
+    case _PC_ASYNC_IO:
+#if defined _POSIX_ASYNC_IO && defined __UCLIBC_HAS_LFS__
+      {
+	/* AIO is only allowed on regular files and block devices.  */
+	struct stat st;
+
+	if (stat (path, &st) < 0
+	    || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode)))
+	  return -1;
+	else
+	  return 1;
+      }
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_PRIO_IO:
+    case _PC_PRIO_IO:
 #ifdef	_POSIX_PRIO_IO
-	    return _POSIX_PRIO_IO;
+      return _POSIX_PRIO_IO;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_SOCK_MAXBUF:
+    case _PC_SOCK_MAXBUF:
 #ifdef	SOCK_MAXBUF
-	    return SOCK_MAXBUF;
+      return SOCK_MAXBUF;
 #else
-	    return -1;
+      return -1;
 #endif
 
-	case _PC_FILESIZEBITS:
+    case _PC_FILESIZEBITS:
 #ifdef FILESIZEBITS
-	    return FILESIZEBITS;
+      return FILESIZEBITS;
 #else
-	    /* We let platforms with larger file sizes overwrite this value.  */
-	    return 32;
+      /* We let platforms with larger file sizes overwrite this value.  */
+      return 32;
 #endif
 
-	    /* Be lazy -- skip these */
-	case _PC_REC_INCR_XFER_SIZE:
-	case _PC_REC_MAX_XFER_SIZE:
-	case _PC_REC_MIN_XFER_SIZE:
-	case _PC_REC_XFER_ALIGN:
-	case _PC_ALLOC_SIZE_MIN:
-	case _PC_SYMLINK_MAX:
-	    return -1;
+        /* Be lazy -- skip these */
+    case _PC_REC_INCR_XFER_SIZE:
+    case _PC_REC_MAX_XFER_SIZE:
+    case _PC_REC_MIN_XFER_SIZE:
+    case _PC_REC_XFER_ALIGN:
+    case _PC_ALLOC_SIZE_MIN:
+    case _PC_SYMLINK_MAX:
+      return -1;
     }
-
 }
-