[PATCH 4/6] iconvconfig: Use common gconv module parsing function

[Siddhesh Poyarekar <siddhesh@sourceware.org>]

Drop local copy of gconv file parsing and use the one in
gconv_parseconfdir.h instead.  Now there is a single implementation of
configuration file parsing.
---
 iconv/iconvconfig.c | 126 ++++----------------------------------------
 1 file changed, 11 insertions(+), 115 deletions(-)

diff --git a/iconv/iconvconfig.c b/iconv/iconvconfig.c
index c9607fb645..53e5c5c6f4 100644
--- a/iconv/iconvconfig.c
+++ b/iconv/iconvconfig.c
@@ -18,7 +18,6 @@
 
 #include <argp.h>
 #include <assert.h>
-#include <dirent.h>
 #include <error.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -34,10 +33,10 @@
 #include <string.h>
 #include <unistd.h>
 #include <sys/cdefs.h>
-#include <sys/types.h>
 #include <sys/uio.h>
 
 #include "iconvconfig.h"
+#include <gconv_parseconfdir.h>
 
 /* Get libc version number.  */
 #include "../version.h"
@@ -568,7 +567,7 @@ new_module (const char *fromname, size_t fromlen, const char *toname,
 
 /* Add new module.  */
 static void
-add_module (char *rp, const char *directory)
+add_module (char *rp, const char *directory, size_t dirlen, int modcount)
 {
   /* We expect now
      1. `from' name
@@ -646,131 +645,28 @@ add_module (char *rp, const char *directory)
 	      cost, need_ext);
 }
 
-/* Read a gconv-modules configuration file.  */
-static bool
-handle_file (const char *dir, const char *infile)
-{
-  FILE *fp;
-  char *line = NULL;
-  size_t linelen = 0;
-
-  fp = fopen (infile, "r");
-  if (fp == NULL)
-    return false;
-
-  /* No threads present.  */
-  __fsetlocking (fp, FSETLOCKING_BYCALLER);
-
-  while (!feof_unlocked (fp))
-    {
-      char *rp, *endp, *word;
-      ssize_t n = __getdelim (&line, &linelen, '\n', fp);
-
-      if (n < 0)
-	/* An error occurred.  */
-	break;
-
-      rp = line;
-      /* Terminate the line (excluding comments or newline) with a NUL
-	 byte to simplify the following code.  */
-      endp = strchr (rp, '#');
-      if (endp != NULL)
-	*endp = '\0';
-      else
-	if (rp[n - 1] == '\n')
-	  rp[n - 1] = '\0';
-
-      while (isspace (*rp))
-	++rp;
-
-      /* If this is an empty line go on with the next one.  */
-      if (rp == endp)
-	continue;
-
-      word = rp;
-      while (*rp != '\0' && !isspace (*rp))
-	++rp;
-
-      if (rp - word == sizeof ("alias") - 1
-	  && memcmp (word, "alias", sizeof ("alias") - 1) == 0)
-	add_alias (rp);
-      else if (rp - word == sizeof ("module") - 1
-	       && memcmp (word, "module", sizeof ("module") - 1) == 0)
-	add_module (rp, dir);
-      /* else */
-	/* Otherwise ignore the line.  */
-    }
-
-  free (line);
-
-  fclose (fp);
-
-  return true;
-}
-
 /* Read config files and add the data for this directory to cache.  */
 static int
 handle_dir (const char *dir)
 {
-  char *cp;
   size_t dirlen = strlen (dir);
   bool found = false;
 
+  /* Add the prefix before sending it off to the parser.  */
+  char *fulldir = xmalloc (prefix_len + dirlen + 2);
+  char *cp = mempcpy (mempcpy (fulldir, prefix, prefix_len), dir, dirlen);
+
   if (dir[dirlen - 1] != '/')
     {
-      char *newp = (char *) xmalloc (dirlen + 2);
-      dir = memcpy (newp, dir, dirlen);
-      newp[dirlen++] = '/';
-      newp[dirlen] = '\0';
+      *cp++ = '/';
+      *cp = '\0';
+      dirlen += 2;
     }
 
-  /* First, look for a gconv-modules file.  */
-  char *buf = malloc (prefix_len + dirlen + sizeof "gconv-modules.d");
-  if (buf == NULL)
-    goto out;
-
-  cp = buf;
-  if (dir[0] == '/')
-    cp = mempcpy (cp, prefix, prefix_len);
-  cp = mempcpy (cp, dir, dirlen);
-  cp = stpcpy (cp, "gconv-modules");
-
-  found |= handle_file (dir, buf);
-
-  /* Next, see if there is a gconv-modules.d directory containing configuration
-     files and if it is non-empty.  */
-  cp[0] = '.';
-  cp[1] = 'd';
-  cp[2] = '\0';
-
-  DIR *confdir = opendir (buf);
-  if (confdir != NULL)
-    {
-      struct dirent *ent;
-      while ((ent = readdir (confdir)) != NULL)
-	{
-	  if (ent->d_type != DT_REG)
-	    continue;
-
-	  size_t len = strlen (ent->d_name);
-	  const char *suffix = ".conf";
-
-	  if (len > strlen (suffix)
-	      && strcmp (ent->d_name + len - strlen (suffix), suffix) == 0)
-	    {
-	      char *conf;
-	      if (asprintf (&conf, "%s/%s", buf, ent->d_name) < 0)
-		continue;
-	      found |= handle_file (dir, conf);
-	      free (conf);
-	    }
-	}
-      closedir (confdir);
-    }
+  found = gconv_parseconfdir (fulldir, dirlen + prefix_len);
 
-  free (buf);
+  free (fulldir);
 
-out:
   if (!found)
     {
       error (0, errno, "failed to open gconv configuration files in `%s'",
-- 
2.31.1