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From 43cea6d5652b6b9e61ac6ecc69419c909b504f47 Mon Sep 17 00:00:00 2001
From: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Mon, 13 Sep 2021 20:48:35 +0530
Subject: [PATCH] iconvconfig: Fix behaviour with --prefix [BZ #28199]
The consolidation of configuration parsing broke behaviour with
--prefix, where the prefix bled into the modules cache. Accept a
prefix which, when non-NULL, is prepended to the path when looking for
configuration files but only the original directory is added to the
modules cache.
This has no effect on the codegen of gconv_conf since it passes NULL.
Reported-by: Patrick McCarty <patrick.mccarty@intel.com>
Reported-by: Michael Hudson-Doyle <michael.hudson@canonical.com>
Reviewed-by: Andreas Schwab <schwab@linux-m68k.org>
---
iconv/gconv_conf.c | 2 +-
iconv/gconv_parseconfdir.h | 22 +++++++++++++++-------
iconv/iconvconfig.c | 16 ++++++++++++----
3 files changed, 28 insertions(+), 12 deletions(-)
diff --git a/iconv/gconv_conf.c b/iconv/gconv_conf.c
index 09ffe02..077082a 100644
--- a/iconv/gconv_conf.c
+++ b/iconv/gconv_conf.c
@@ -477,7 +477,7 @@ __gconv_read_conf (void)
__gconv_get_path ();
for (cnt = 0; __gconv_path_elem[cnt].name != NULL; ++cnt)
- gconv_parseconfdir (__gconv_path_elem[cnt].name,
+ gconv_parseconfdir (NULL, __gconv_path_elem[cnt].name,
__gconv_path_elem[cnt].len);
#endif
diff --git a/iconv/gconv_parseconfdir.h b/iconv/gconv_parseconfdir.h
index 2f06268..a586268 100644
--- a/iconv/gconv_parseconfdir.h
+++ b/iconv/gconv_parseconfdir.h
@@ -39,7 +39,6 @@
/* Name of the file containing the module information in the directories
along the path. */
static const char gconv_conf_filename[] = "gconv-modules";
-static const char gconv_conf_dirname[] = "gconv-modules.d";
static void add_alias (char *);
static void add_module (char *, const char *, size_t, int);
@@ -110,19 +109,28 @@ read_conf_file (const char *filename, const char *directory, size_t dir_len)
return true;
}
+/* Prefix DIR (with length DIR_LEN) with PREFIX if the latter is non-NULL and
+ parse configuration in it. */
+
static __always_inline bool
-gconv_parseconfdir (const char *dir, size_t dir_len)
+gconv_parseconfdir (const char *prefix, const char *dir, size_t dir_len)
{
- /* No slash needs to be inserted between dir and gconv_conf_filename;
- dir already ends in a slash. */
- char *buf = malloc (dir_len + sizeof (gconv_conf_dirname));
+ /* No slash needs to be inserted between dir and gconv_conf_filename; dir
+ already ends in a slash. The additional 2 is to accommodate the ".d"
+ when looking for configuration files in gconv-modules.d. */
+ size_t buflen = dir_len + sizeof (gconv_conf_filename) + 2;
+ char *buf = malloc (buflen + (prefix != NULL ? strlen (prefix) : 0));
+ char *cp = buf;
bool found = false;
if (buf == NULL)
return false;
- char *cp = mempcpy (mempcpy (buf, dir, dir_len), gconv_conf_filename,
- sizeof (gconv_conf_filename));
+ if (prefix != NULL)
+ cp = stpcpy (cp, prefix);
+
+ cp = mempcpy (mempcpy (cp, dir, dir_len), gconv_conf_filename,
+ sizeof (gconv_conf_filename));
/* Read the gconv-modules configuration file first. */
found = read_conf_file (buf, dir, dir_len);
diff --git a/iconv/iconvconfig.c b/iconv/iconvconfig.c
index fd61cf2..a89b62e 100644
--- a/iconv/iconvconfig.c
+++ b/iconv/iconvconfig.c
@@ -652,13 +652,21 @@ add_module (char *rp, const char *directory,
static int
handle_dir (const char *dir)
{
+ char *newp = NULL;
size_t dirlen = strlen (dir);
bool found = false;
- char *fulldir = xasprintf ("%s%s%s", dir[0] == '/' ? prefix : "",
- dir, dir[dirlen - 1] != '/' ? "/" : "");
+ /* End directory path with a '/' if it doesn't already. */
+ if (dir[dirlen - 1] != '/')
+ {
+ newp = xmalloc (dirlen + 2);
+ memcpy (newp, dir, dirlen);
+ newp[dirlen++] = '/';
+ newp[dirlen] = '\0';
+ dir = newp;
+ }
- found = gconv_parseconfdir (fulldir, strlen (fulldir));
+ found = gconv_parseconfdir (dir[0] == '/' ? prefix : NULL, dir, dirlen);
if (!found)
{
@@ -670,7 +678,7 @@ handle_dir (const char *dir)
"configuration files with names ending in .conf.");
}
- free (fulldir);
+ free (newp);
return found ? 0 : 1;
}
--
1.8.3.1
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