gnu/packages/patches/patch-hurd-path-max.patch

   1 See <http://lists.gnu.org/archive/html/bug-patch/2015-06/msg00009.html>
   2
   3 From 0507dfad5f060161f01840067e1bb1615257b636 Mon Sep 17 00:00:00 2001
   4 From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
   5 Date: Mon, 8 Jun 2015 17:27:56 +0200
   6 Subject: [PATCH] Do not rely on PATH_MAX when reading a symlink target.
   7
   8 * src/util.c (move_file, copy_file): Use 'fromst->st_size + 1' and
   9 'tost->st_size + 1' for the allocation, and 'fromst->st_size' and
  10 'tost->st_size' instead of PATH_MAX.  Fixes compilation on GNU/Hurd.
  11 ---
  12  src/util.c | 8 ++++----
  13  1 file changed, 4 insertions(+), 4 deletions(-)
  14
  15 diff --git a/src/util.c b/src/util.c
  16 index 82a7e37..c4c0f9d 100644
  17 --- a/src/util.c
  18 +++ b/src/util.c
  19 @@ -460,12 +460,12 @@ move_file (char const *from, bool *from_needs_removal,
  20
  21           /* FROM contains the contents of the symlink we have patched; need
  22              to convert that back into a symlink. */
  23 -         char *buffer = xmalloc (PATH_MAX);
  24 +         char *buffer = xmalloc (fromst->st_size + 1);
  25           int fd, size = 0, i;
  26
  27           if ((fd = safe_open (from, O_RDONLY | O_BINARY, 0)) < 0)
  28             pfatal ("Can't reopen file %s", quotearg (from));
  29 -         while ((i = read (fd, buffer + size, PATH_MAX - size)) > 0)
  30 +         while ((i = read (fd, buffer + size, fromst->st_size - size)) > 0)
  31             size += i;
  32           if (i != 0 || close (fd) != 0)
  33             read_fatal ();
  34 @@ -610,9 +610,9 @@ copy_file (char const *from, char const *to, struct stat *tost,
  35
  36    if (S_ISLNK (mode))
  37      {
  38 -      char *buffer = xmalloc (PATH_MAX);
  39 +      char *buffer = xmalloc (tost->st_size + 1);
  40
  41 -      if (safe_readlink (from, buffer, PATH_MAX) < 0)
  42 +      if (safe_readlink (from, buffer, tost->st_size) < 0)
  43         pfatal ("Can't read %s %s", "symbolic link", from);
  44        if (safe_symlink (buffer, to) != 0)
  45         pfatal ("Can't create %s %s", "symbolic link", to);
  46 --
  47 2.4.2
  48