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3a285f29fb
* lib/relocatable.h (relocate2): New declaration/macro. * lib/relocatable.c (relocate2): New function. * doc/relocatable-maint.texi (Supporting Relocation): Mention the relocate2 function. * lib/localcharset.c (relocate2): Define fallback. (get_charset_aliases): Invoke relocate2 instead of relocate. Free the allocated memory. * lib/javaversion.c (relocate2): Define fallback. (javaexec_version): Invoke relocate2 instead of relocate. Free the allocated memory.
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/* Determine the Java version supported by javaexec.
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Copyright (C) 2006-2017 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2006.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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/* Specification. */
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#include "javaversion.h"
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#include <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#if ENABLE_RELOCATABLE
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# include "relocatable.h"
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#else
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# define relocate(pathname) (pathname)
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# define relocate2(pathname,allocatedp) (*(allocatedp) = NULL, (pathname))
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#endif
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#include "javaexec.h"
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#include "spawn-pipe.h"
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#include "wait-process.h"
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#include "error.h"
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#include "gettext.h"
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#define _(str) gettext (str)
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/* Get PKGDATADIR. */
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#include "configmake.h"
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struct locals
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{
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/* OUT */
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char *line;
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};
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static bool
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execute_and_read_line (const char *progname,
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const char *prog_path, char **prog_argv,
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void *private_data)
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{
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struct locals *l = (struct locals *) private_data;
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pid_t child;
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int fd[1];
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FILE *fp;
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char *line;
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size_t linesize;
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size_t linelen;
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int exitstatus;
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/* Open a pipe to the JVM. */
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child = create_pipe_in (progname, prog_path, prog_argv, DEV_NULL, false,
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true, false, fd);
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if (child == -1)
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return false;
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/* Retrieve its result. */
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fp = fdopen (fd[0], "r");
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if (fp == NULL)
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{
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error (0, errno, _("fdopen() failed"));
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return false;
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}
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line = NULL; linesize = 0;
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linelen = getline (&line, &linesize, fp);
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if (linelen == (size_t)(-1))
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{
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error (0, 0, _("%s subprocess I/O error"), progname);
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return false;
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}
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if (linelen > 0 && line[linelen - 1] == '\n')
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line[linelen - 1] = '\0';
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fclose (fp);
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/* Remove zombie process from process list, and retrieve exit status. */
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exitstatus =
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wait_subprocess (child, progname, true, false, true, false, NULL);
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if (exitstatus != 0)
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{
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free (line);
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return false;
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}
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l->line = line;
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return false;
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}
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char *
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javaexec_version (void)
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{
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const char *class_name = "javaversion";
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char *malloc_pkgdatadir;
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const char *pkgdatadir = relocate2 (PKGDATADIR, &malloc_pkgdatadir);
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const char *args[1];
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struct locals locals;
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args[0] = NULL;
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locals.line = NULL;
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execute_java_class (class_name, &pkgdatadir, 1, true, NULL, args,
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false, false, execute_and_read_line, &locals);
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free (malloc_pkgdatadir);
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return locals.line;
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}
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