1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/* Test program for argp argument parser
Copyright (C) 1997-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <argp.h>
const char *argp_program_version = "argp-test 1.0";
struct argp_option sub_options[] =
{
{"subopt1", 's', 0, 0, "Nested option 1"},
{"subopt2", 'S', 0, 0, "Nested option 2"},
{ 0, 0, 0, 0, "Some more nested options:", 10},
{"subopt3", 'p', 0, 0, "Nested option 3"},
{"subopt4", 'q', 0, 0, "Nested option 4", 1},
{0}
};
static const char sub_args_doc[] = "STRING...\n-";
static const char sub_doc[] = "\vThis is the doc string from the sub-arg-parser.";
static error_t
sub_parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case ARGP_KEY_NO_ARGS:
printf ("NO SUB ARGS\n");
break;
case ARGP_KEY_ARG:
printf ("SUB ARG: %s\n", arg);
break;
case 's' : case 'S': case 'p': case 'q':
printf ("SUB KEY %c\n", key);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static char *
sub_help_filter (int key, const char *text, void *input)
{
if (key == ARGP_KEY_HELP_EXTRA)
return strdup ("This is some extra text from the sub parser (note that it \
is preceded by a blank line).");
else
return (char *)text;
}
static struct argp sub_argp = {
sub_options, sub_parse_opt, sub_args_doc, sub_doc, 0, sub_help_filter
};
/* Structure used to communicate with the parsing functions. */
struct params
{
unsigned foonly; /* Value parsed for foonly. */
unsigned foonly_default; /* Default value for it. */
};
#define OPT_PGRP 1
#define OPT_SESS 2
struct argp_option options[] =
{
{"pid", 'p', "PID", 0, "List the process PID"},
{"pgrp", OPT_PGRP,"PGRP",0, "List processes in the process group PGRP"},
{"no-parent", 'P', 0, 0, "Include processes without parents"},
{0, 'x', 0, OPTION_ALIAS},
{"all-fields",'Q', 0, 0, "Don't elide unusable fields (normally"
" if there's some reason ps can't"
" print a field for any process, it's"
" removed from the output entirely)" },
{"reverse", 'r', 0, 0, "Reverse the order of any sort"},
{"gratuitously-long-reverse-option", 0, 0, OPTION_ALIAS},
{"session", OPT_SESS,"SID", OPTION_ARG_OPTIONAL,
"Add the processes from the session"
" SID (which defaults to the sid of"
" the current process)" },
{0,0,0,0, "Here are some more options:"},
{"foonly", 'f', "ZOT", OPTION_ARG_OPTIONAL, "Glork a foonly"},
{"zaza", 'z', 0, 0, "Snit a zar"},
{0}
};
static const char args_doc[] = "STRING";
static const char doc[] = "Test program for argp."
"\vThis doc string comes after the options."
"\nHey! Some manual formatting!"
"\nThe current time is: %s";
static void
popt (int key, char *arg)
{
char buf[12];
if (isprint (key))
sprintf (buf, "%c", key);
else
sprintf (buf, "%d", key);
if (arg)
printf ("KEY %s: %s\n", buf, arg);
else
printf ("KEY %s\n", buf);
}
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
struct params *params = state->input;
switch (key)
{
case ARGP_KEY_NO_ARGS:
printf ("NO ARGS\n");
break;
case ARGP_KEY_ARG:
if (state->arg_num > 0)
return ARGP_ERR_UNKNOWN; /* Leave it for the sub-arg parser. */
printf ("ARG: %s\n", arg);
break;
case 'f':
if (arg)
params->foonly = atoi (arg);
else
params->foonly = params->foonly_default;
popt (key, arg);
break;
case 'p': case 'P': case OPT_PGRP: case 'x': case 'Q':
case 'r': case OPT_SESS: case 'z':
popt (key, arg);
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static char *
help_filter (int key, const char *text, void *input)
{
char *new_text;
struct params *params = input;
if (key == ARGP_KEY_HELP_POST_DOC && text)
{
time_t now = time (0);
asprintf (&new_text, text, ctime (&now));
}
else if (key == 'f')
/* Show the default for the --foonly option. */
asprintf (&new_text, "%s (ZOT defaults to %x)",
text, params->foonly_default);
else
new_text = (char *)text;
return new_text;
}
static struct argp_child argp_children[] = { { &sub_argp }, { 0 } };
static struct argp argp = {
options, parse_opt, args_doc, doc, argp_children, help_filter
};
int
main (int argc, char **argv)
{
struct params params;
params.foonly = 0;
params.foonly_default = random ();
argp_parse (&argp, argc, argv, 0, 0, ¶ms);
printf ("After parsing: foonly = %x\n", params.foonly);
return 0;
}
|
