source4/torture/smbiconv.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Charset module tester
   4
   5    Copyright (C) Jelmer Vernooij 2003
   6    Based on iconv/icon_prog.c from the GNU C Library,
   7       Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 static int process_block (smb_iconv_t cd, const char *addr, size_t len, FILE *output)
  27 {
  28 #define OUTBUF_SIZE     32768
  29   const char *start = addr;
  30   char outbuf[OUTBUF_SIZE];
  31   char *outptr;
  32   size_t outlen;
  33   size_t n;
  34
  35   while (len > 0)
  36     {
  37       outptr = outbuf;
  38       outlen = OUTBUF_SIZE;
  39       n = smb_iconv (cd,  &addr, &len, &outptr, &outlen);
  40
  41       if (outptr != outbuf)
  42         {
  43           /* We have something to write out.  */
  44           int errno_save = errno;
  45
  46           if (fwrite (outbuf, 1, outptr - outbuf, output)
  47               < (size_t) (outptr - outbuf)
  48               || ferror (output))
  49             {
  50               /* Error occurred while printing the result.  */
  51               DEBUG (0, ("conversion stopped due to problem in writing the output"));
  52               return -1;
  53             }
  54
  55           errno = errno_save;
  56         }
  57
  58       if (errno != E2BIG)
  59         {
  60           /* iconv() ran into a problem.  */
  61           switch (errno)
  62             {
  63             case EILSEQ:
  64               DEBUG(0,("illegal input sequence at position %ld",
  65                      (long) (addr - start)));
  66               break;
  67             case EINVAL:
  68               DEBUG(0, ("\
  69 incomplete character or shift sequence at end of buffer"));
  70               break;
  71             case EBADF:
  72               DEBUG(0, ("internal error (illegal descriptor)"));
  73               break;
  74             default:
  75               DEBUG(0, ("unknown iconv() error %d", errno));
  76               break;
  77             }
  78
  79           return -1;
  80         }
  81     }
  82
  83   return 0;
  84 }
  85
  86
  87 static int process_fd (iconv_t cd, int fd, FILE *output)
  88 {
  89   /* we have a problem with reading from a descriptor since we must not
  90      provide the iconv() function an incomplete character or shift
  91      sequence at the end of the buffer.  Since we have to deal with
  92      arbitrary encodings we must read the whole text in a buffer and
  93      process it in one step.  */
  94   static char *inbuf = NULL;
  95   static size_t maxlen = 0;
  96   char *inptr = NULL;
  97   size_t actlen = 0;
  98
  99   while (actlen < maxlen)
 100     {
 101       ssize_t n = read (fd, inptr, maxlen - actlen);
 102
 103       if (n == 0)
 104         /* No more text to read.  */
 105         break;
 106
 107       if (n == -1)
 108         {
 109           /* Error while reading.  */
 110           DEBUG(0, ("error while reading the input"));
 111           return -1;
 112         }
 113
 114       inptr += n;
 115       actlen += n;
 116     }
 117
 118   if (actlen == maxlen)
 119     while (1)
 120       {
 121         ssize_t n;
 122         char *new_inbuf;
 123
 124         /* Increase the buffer.  */
 125         new_inbuf = (char *) realloc (inbuf, maxlen + 32768);
 126         if (new_inbuf == NULL)
 127           {
 128             DEBUG(0, ("unable to allocate buffer for input"));
 129             return -1;
 130           }
 131         inbuf = new_inbuf;
 132         maxlen += 32768;
 133         inptr = inbuf + actlen;
 134
 135         do
 136           {
 137             n = read (fd, inptr, maxlen - actlen);
 138
 139             if (n == 0)
 140               /* No more text to read.  */
 141               break;
 142
 143             if (n == -1)
 144               {
 145                 /* Error while reading.  */
 146                 DEBUG(0, ("error while reading the input"));
 147                 return -1;
 148               }
 149
 150             inptr += n;
 151             actlen += n;
 152           }
 153         while (actlen < maxlen);
 154
 155         if (n == 0)
 156           /* Break again so we leave both loops.  */
 157           break;
 158       }
 159
 160   /* Now we have all the input in the buffer.  Process it in one run.  */
 161   return process_block (cd, inbuf, actlen, output);
 162 }
 163
 164 /* Main function */
 165
 166 int main(int argc, char *argv[])
 167 {
 168         const char *file = NULL;
 169         char *from = "";
 170         char *to = "";
 171         char *output = NULL;
 172         const char *preload_modules[] = {NULL, NULL};
 173         FILE *out = stdout;
 174         int fd;
 175         smb_iconv_t cd;
 176
 177         /* make sure the vars that get altered (4th field) are in
 178            a fixed location or certain compilers complain */
 179         poptContext pc;
 180         struct poptOption long_options[] = {
 181                 POPT_AUTOHELP
 182                 { "from-code", 'f', POPT_ARG_STRING, &from, 0, "Encoding of original text" },
 183                 { "to-code", 't', POPT_ARG_STRING, &to, 0, "Encoding for output" },
 184                 { "output", 'o', POPT_ARG_STRING, &output, 0, "Write output to this file" },
 185                 { "preload-modules", 'p', POPT_ARG_STRING, &preload_modules[0], 0, "Modules to load" },
 186                 { NULL }
 187         };
 188
 189         setlinebuf(stdout);
 190
 191         pc = poptGetContext("smbiconv", argc, (const char **) argv,
 192                             long_options, 0);
 193
 194         poptSetOtherOptionHelp(pc, "[FILE] ...");
 195
 196         while(poptGetNextOpt(pc) != -1);
 197
 198         if (preload_modules[0]) smb_load_modules(preload_modules);
 199
 200         if(output) {
 201                 out = fopen(output, "w");
 202
 203                 if(!out) {
 204                         DEBUG(0, ("Can't open output file '%s': %s, exiting...\n", output, strerror(errno)));
 205                         return 1;
 206                 }
 207         }
 208
 209         cd = smb_iconv_open(to, from);
 210         if((int)cd == -1) {
 211                 DEBUG(0,("unable to find from or to encoding, exiting...\n"));
 212                 return 1;
 213         }
 214
 215         while((file = poptGetArg(pc))) {
 216                 if(strcmp(file, "-") == 0) fd = 0;
 217                 else {
 218                         fd = open(file, O_RDONLY);
 219
 220                         if(!fd) {
 221                                 DEBUG(0, ("Can't open input file '%s': %s, ignoring...\n", file, strerror(errno)));
 222                                 continue;
 223                         }
 224                 }
 225
 226                 /* Loop thru all arguments */
 227                 process_fd(cd, fd, out);
 228
 229                 close(fd);
 230         }
 231         poptFreeContext(pc);
 232
 233         fclose(out);
 234
 235         return 0;
 236 }