Upstream status: This patch was taken from leptonica upstream.
Backported to ghostscripts bundled leptonica.
From f04da7c816feb1d5f689c34f3d0e7e3621edf1f5 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Wed, 1 Feb 2023 19:35:43 +0100
Subject: [PATCH] Fix GNU/Hurd build
There is no PATH_MAX limitation on GNU/Hurd, and realpath() can be
safely be used with its second parameter set to NULL (as required by
posix since its version 2001).
---
src/sarray1.c | 29 +++++++++++++++++++++++------
1 file changed, 23 insertions(+), 6 deletions(-)
--- a/src/sarray1.c 2023-06-13 12:31:13.393672916 +0200
+++ a/src/sarray1.c 2023-06-13 12:34:13.574237149 +0200
@@ -1953,7 +1953,11 @@
SARRAY *
getFilenamesInDirectory(const char *dirname)
{
+#if _POSIX_VERSION >= 200112 || defined(__GLIBC__)
+char *dir;
+#else
char dir[PATH_MAX + 1];
+#endif
char *realdir, *stat_path, *ignore;
size_t size;
SARRAY *safiles;
@@ -1976,17 +1980,28 @@
* If the file or directory exists, realpath returns its path;
else it returns NULL.
* If the second arg to realpath is passed in, the canonical path
- is returned there. Use a buffer of sufficient size. If the
- second arg is NULL, the path is malloc'd and returned if the
- file or directory exists.
- We pass in a buffer for the second arg, and check that the canonical
- directory path was made. The existence of the directory is checked
- later, after its actual path is returned by genPathname(). */
+ is returned there. Use a buffer of sufficient size.
+ We pass in a buffer for the second arg, and check that the
+ canonical directory path was made. The existence of the
+ directory is checked later, after its actual path is returned by
+ genPathname().
+ With GNU libc or Posix 2001, if the second arg is NULL, the path
+ is malloc'd and returned if the file or directory exists.
+ */
+#if _POSIX_VERSION >= 200112 || defined(__GLIBC__)
+ dir = realpath(dirname, NULL);
+ if (dir == NULL)
+ return (SARRAY *)ERROR_PTR("dir not made", __func__, NULL);
+#else
dir[0] = '\0'; /* init empty in case realpath() fails to write it */
ignore = realpath(dirname, dir);
if (dir[0] == '\0')
return (SARRAY *)ERROR_PTR("dir not made", procName, NULL);
+#endif
realdir = genPathname(dir, NULL);
+#if _POSIX_VERSION >= 200112 || defined(__GLIBC__)
+ LEPT_FREE(dir);
+#endif
if ((pdir = opendir(realdir)) == NULL) {
LEPT_FREE(realdir);
return (SARRAY *)ERROR_PTR("pdir not opened", procName, NULL);
@@ -1998,10 +2013,12 @@
stat_ret = fstatat(dfd, pdirentry->d_name, &st, 0);
#else
size = strlen(realdir) + strlen(pdirentry->d_name) + 2;
+#if _POSIX_VERSION < 200112 && !defined(__GLIBC__)
if (size > PATH_MAX) {
L_ERROR("size = %zu too large; skipping\n", procName, size);
continue;
}
+#endif
stat_path = (char *)LEPT_CALLOC(size, 1);
snprintf(stat_path, size, "%s/%s", realdir, pdirentry->d_name);
stat_ret = stat(stat_path, &st);
