lib/libkiconv/kiconv_sysctl.c

   1 /*-
   2  * Copyright (c) 2005 Ryuichiro Imura
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: head/lib/libkiconv/kiconv_sysctl.c 194663 2009-06-22 21:49:55Z delphij $
  27  */
  28
  29 #include <sys/types.h>
  30 #include <sys/iconv.h>
  31 #include <sys/sysctl.h>
  32
  33 #include <ctype.h>
  34 #include <errno.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 int
  39 kiconv_lookupconv(const char *drvname)
  40 {
  41         size_t size;
  42
  43         if (sysctlbyname("kern.iconv.drvlist", NULL, &size, NULL, 0) == -1)
  44                 return (errno);
  45         if (size > 0) {
  46                 char *drivers, *drvp;
  47
  48                 drivers = malloc(size);
  49                 if (drivers == NULL)
  50                         return (ENOMEM);
  51                 if (sysctlbyname("kern.iconv.drvlist", drivers, &size, NULL, 0) == -1) {
  52                         free(drivers);
  53                         return (errno);
  54                 }
  55                 for (drvp = drivers; *drvp != '\0'; drvp += strlen(drvp) + 1)
  56                         if (strcmp(drvp, drvname) == 0) {
  57                                 free(drivers);
  58                                 return (0);
  59                         }
  60         }
  61         return (ENOENT);
  62 }
  63
  64 int
  65 kiconv_lookupcs(const char *tocode, const char *fromcode)
  66 {
  67         size_t i, size;
  68         struct iconv_cspair_info *csi, *csip;
  69
  70         if (sysctlbyname("kern.iconv.cslist", NULL, &size, NULL, 0) == -1)
  71                 return (errno);
  72         if (size > 0) {
  73                 csi = malloc(size);
  74                 if (csi == NULL)
  75                         return (ENOMEM);
  76                 if (sysctlbyname("kern.iconv.cslist", csi, &size, NULL, 0) == -1) {
  77                         free(csi);
  78                         return (errno);
  79                 }
  80                 for (i = 0, csip = csi; i < (size/sizeof(*csi)); i++, csip++){
  81                         if (strcmp(csip->cs_to, tocode) == 0 &&
  82                             strcmp(csip->cs_from, fromcode) == 0) {
  83                                 free(csi);
  84                                 return (0);
  85                         }
  86                 }
  87         }
  88         return (ENOENT);
  89 }