dircolors patch for locales like Turkish

[Paul Eggert]

As we've been seeing in bug-gnulib, locales like Turkish say that "i"
and "I" are not lower- and upper-case variants of the same letter, but
are two different letters.  Hence utilities should not rely on
strcasecmp when they want the usual ASCII semantics.  Here's a patch
for coreutils.

2007-02-14  Paul Eggert  <address@hidden>

        * bootstrap.conf (gnulib_modules): Add c-strcase.  Remove strcase.
        * src/dircolors.c: Include c-strcase.h.
        (dc_parse_stream): Use c_strcasecmp rather than
        strcasecmp to avoid unreliable results in locales like Turkish
        where strcasecmp is incompatible with the C locale.

diff --git a/bootstrap.conf b/bootstrap.conf
index 631f2ed..e94478a 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -38,7 +38,8 @@ obsolete_gnulib_modules='
 gnulib_modules="
        $avoided_gnulib_modules
        $obsolete_gnulib_modules
-       acl alloca announce-gen argmatch assert backupfile base64 c-strtod
+       acl alloca announce-gen argmatch assert backupfile base64
+       c-strcase c-strtod
        c-strtold calloc canon-host canonicalize chown cloexec
        config-h configmake
        closeout cycle-check d-ino d-type diacrit dirfd dirname dup2
@@ -60,7 +61,7 @@ gnulib_modules="
        rpmatch
        safe-read same
        save-cwd savedir savewd settime sha1 sig2str ssize_t stat-macros
-       stat-time stdbool stdlib-safer stpcpy strcase strftime
+       stat-time stdbool stdlib-safer stpcpy strftime
        strpbrk strtoimax strtoumax strverscmp sys_stat timespec tzset
        unicodeio unistd-safer unlink-busy unlinkdir unlocked-io
        uptime userspec utimecmp utimens vasprintf verify version-etc-fsf
diff --git a/src/dircolors.c b/src/dircolors.c
index a6c9889..82eb1e0 100644
--- a/src/dircolors.c
+++ b/src/dircolors.c
@@ -24,6 +24,7 @@
 
 #include "system.h"
 #include "dircolors.h"
+#include "c-strcase.h"
 #include "error.h"
 #include "getline.h"
 #include "obstack.h"
@@ -295,7 +296,7 @@ dc_parse_stream (FILE *fp, const char *filename)
        }
 
       unrecognized = false;
-      if (strcasecmp (keywd, "TERM") == 0)
+      if (c_strcasecmp (keywd, "TERM") == 0)
        {
          if (STREQ (arg, term))
            state = ST_TERMSURE;
@@ -324,9 +325,9 @@ dc_parse_stream (FILE *fp, const char *filename)
                  append_quoted (arg);
                  APPEND_CHAR (':');
                }
-             else if (strcasecmp (keywd, "OPTIONS") == 0
-                      || strcasecmp (keywd, "COLOR") == 0
-                      || strcasecmp (keywd, "EIGHTBIT") == 0)
+             else if (c_strcasecmp (keywd, "OPTIONS") == 0
+                      || c_strcasecmp (keywd, "COLOR") == 0
+                      || c_strcasecmp (keywd, "EIGHTBIT") == 0)
                {
                  /* Ignore.  */
                }
@@ -335,7 +336,7 @@ dc_parse_stream (FILE *fp, const char *filename)
                  int i;
 
                  for (i = 0; slack_codes[i] != NULL; ++i)
-                   if (strcasecmp (keywd, slack_codes[i]) == 0)
+                   if (c_strcasecmp (keywd, slack_codes[i]) == 0)
                      break;
 
                  if (slack_codes[i] != NULL)