1  /* Reading Java ResourceBundles.
       2     Copyright (C) 2001-2003, 2006-2008, 2010-2011, 2017, 2019-2020 Free Software
       3     Foundation, Inc.
       4     Written by Bruno Haible <haible@clisp.cons.org>, 2001.
       5  
       6     This program is free software: you can redistribute it and/or modify
       7     it under the terms of the GNU General Public License as published by
       8     the Free Software Foundation; either version 3 of the License, or
       9     (at your option) any later version.
      10  
      11     This program is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14     GNU General Public License for more details.
      15  
      16     You should have received a copy of the GNU General Public License
      17     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifdef HAVE_CONFIG_H
      20  # include <config.h>
      21  #endif
      22  
      23  /* Specification.  */
      24  #include "read-java.h"
      25  
      26  #include <stdbool.h>
      27  #include <stdio.h>
      28  #include <stdlib.h>
      29  #include <errno.h>
      30  
      31  #include "msgunfmt.h"
      32  #include "relocatable.h"
      33  #include "javaexec.h"
      34  #include "spawn-pipe.h"
      35  #include "wait-process.h"
      36  #include "read-catalog.h"
      37  #include "read-po.h"
      38  #include "error.h"
      39  #include "gettext.h"
      40  
      41  #define _(str) gettext (str)
      42  
      43  
      44  /* A Java resource name can only be manipulated by a Java virtual machine.
      45     So we start a JVM to execute the DumpResource program, and read its
      46     output, which is .po format without comments.  */
      47  
      48  struct locals
      49  {
      50    /* OUT */
      51    msgdomain_list_ty *mdlp;
      52  };
      53  
      54  static bool
      55  execute_and_read_po_output (const char *progname,
      56                              const char *prog_path,
      57                              const char * const *prog_argv,
      58                              void *private_data)
      59  {
      60    struct locals *l = (struct locals *) private_data;
      61    pid_t child;
      62    int fd[1];
      63    FILE *fp;
      64    int exitstatus;
      65  
      66    /* Open a pipe to the JVM.  */
      67    child = create_pipe_in (progname, prog_path, prog_argv, NULL,
      68                            DEV_NULL, false, true, true, fd);
      69  
      70    fp = fdopen (fd[0], "r");
      71    if (fp == NULL)
      72      error (EXIT_FAILURE, errno, _("fdopen() failed"));
      73  
      74    /* Read the message list.  */
      75    l->mdlp = read_catalog_stream (fp, "(pipe)", "(pipe)", &input_format_po);
      76  
      77    fclose (fp);
      78  
      79    /* Remove zombie process from process list, and retrieve exit status.  */
      80    exitstatus =
      81      wait_subprocess (child, progname, false, false, true, true, NULL);
      82    if (exitstatus != 0)
      83      error (EXIT_FAILURE, 0, _("%s subprocess failed with exit code %d"),
      84             progname, exitstatus);
      85  
      86    return false;
      87  }
      88  
      89  
      90  msgdomain_list_ty *
      91  msgdomain_read_java (const char *resource_name, const char *locale_name)
      92  {
      93    const char *class_name = "gnu.gettext.DumpResource";
      94    const char *gettextjar;
      95    const char *args[3];
      96    struct locals locals;
      97  
      98    /* Make it possible to override the gettext.jar location.  This is
      99       necessary for running the testsuite before "make install".  */
     100    gettextjar = getenv ("GETTEXTJAR");
     101    if (gettextjar == NULL || gettextjar[0] == '\0')
     102      gettextjar = relocate (GETTEXTJAR);
     103  
     104    /* Assign a default value to the resource name.  */
     105    if (resource_name == NULL)
     106      resource_name = "Messages";
     107  
     108    /* Prepare arguments.  */
     109    args[0] = resource_name;
     110    if (locale_name != NULL)
     111      {
     112        args[1] = locale_name;
     113        args[2] = NULL;
     114      }
     115    else
     116      args[1] = NULL;
     117  
     118    /* Dump the resource and retrieve the resulting output.
     119       Here we use the user's CLASSPATH, not a minimal one, so that the
     120       resource can be found.  */
     121    if (execute_java_class (class_name, &gettextjar, 1, false, NULL,
     122                            args,
     123                            verbose, false,
     124                            execute_and_read_po_output, &locals))
     125      /* An error message should already have been provided.  */
     126      exit (EXIT_FAILURE);
     127  
     128    return locals.mdlp;
     129  }