xref: /third_party/elfutils/src/arlib-argp.c (revision da0c48c4) 
1/* Options common to ar and ranlib.
2   Copyright (C) 2012 Red Hat, Inc.
3   This file is part of elfutils.
4
5   This file is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   elfutils is distributed in the hope that it will be useful, but
11   WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#ifdef HAVE_CONFIG_H
19# include <config.h>
20#endif
21
22#include <argp.h>
23
24#include "arlib.h"
25
26bool arlib_deterministic_output = DEFAULT_AR_DETERMINISTIC;
27
28static const struct argp_option options[] =
29  {
30    { NULL, 'D', NULL, 0,
31      N_("Use zero for uid, gid, and date in archive members."), 0 },
32    { NULL, 'U', NULL, 0,
33      N_("Use actual uid, gid, and date in archive members."), 0 },
34
35    { NULL, 0, NULL, 0, NULL, 0 }
36  };
37
38static error_t
39parse_opt (int key, char *arg __attribute__ ((unused)),
40           struct argp_state *state __attribute__ ((unused)))
41{
42  switch (key)
43    {
44    case 'D':
45      arlib_deterministic_output = true;
46      break;
47
48    case 'U':
49      arlib_deterministic_output = false;
50      break;
51
52    default:
53      return ARGP_ERR_UNKNOWN;
54    }
55  return 0;
56}
57
58static char *
59text_for_default (const char *text)
60{
61  char *new_text;
62  if (unlikely (asprintf (&new_text, _("%s (default)"), text) < 0))
63    return (char *) text;
64  return new_text;
65}
66
67static char *
68help_filter (int key, const char *text, void *input __attribute__ ((unused)))
69{
70  switch (key)
71    {
72    case 'D':
73      if (DEFAULT_AR_DETERMINISTIC)
74        return text_for_default (text);
75      break;
76    case 'U':
77      if (! DEFAULT_AR_DETERMINISTIC)
78        return text_for_default (text);
79      break;
80    }
81
82  return (char *) text;
83}
84
85static const struct argp argp =
86  {
87    options, parse_opt, NULL, NULL, NULL, help_filter, NULL
88  };
89
90const struct argp_child arlib_argp_children[] =
91  {
92    { &argp, 0, "", 2 },
93    { NULL, 0, NULL, 0 }
94  };
95