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
|
/* basename -- strip directory and suffix from file names
Copyright (C) 1990-2016 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <getopt.h>
#include <stdio.h>
#include <sys/types.h>
#include "system.h"
#include "error.h"
#include "quote.h"
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "basename"
#define AUTHORS proper_name ("David MacKenzie")
static struct option const longopts[] =
{
{"multiple", no_argument, NULL, 'a'},
{"suffix", required_argument, NULL, 's'},
{"zero", no_argument, NULL, 'z'},
{GETOPT_HELP_OPTION_DECL},
{GETOPT_VERSION_OPTION_DECL},
{NULL, 0, NULL, 0}
};
void
usage (int status)
{
if (status != EXIT_SUCCESS)
emit_try_help ();
else
{
printf (_("\
Usage: %s NAME [SUFFIX]\n\
or: %s OPTION... NAME...\n\
"),
program_name, program_name);
fputs (_("\
Print NAME with any leading directory components removed.\n\
If specified, also remove a trailing SUFFIX.\n\
"), stdout);
emit_mandatory_arg_note ();
fputs (_("\
-a, --multiple support multiple arguments and treat each as a NAME\n\
-s, --suffix=SUFFIX remove a trailing SUFFIX; implies -a\n\
-z, --zero end each output line with NUL, not newline\n\
"), stdout);
fputs (HELP_OPTION_DESCRIPTION, stdout);
fputs (VERSION_OPTION_DESCRIPTION, stdout);
printf (_("\
\n\
Examples:\n\
%s /usr/bin/sort -> \"sort\"\n\
%s include/stdio.h .h -> \"stdio\"\n\
%s -s .h include/stdio.h -> \"stdio\"\n\
%s -a any/str1 any/str2 -> \"str1\" followed by \"str2\"\n\
"),
program_name, program_name, program_name, program_name);
emit_ancillary_info (PROGRAM_NAME);
}
exit (status);
}
/* Remove SUFFIX from the end of NAME if it is there, unless NAME
consists entirely of SUFFIX. */
static void
remove_suffix (char *name, const char *suffix)
{
char *np;
const char *sp;
np = name + strlen (name);
sp = suffix + strlen (suffix);
while (np > name && sp > suffix)
if (*--np != *--sp)
return;
if (np > name)
*np = '\0';
}
/* Perform the basename operation on STRING. If SUFFIX is non-NULL, remove
the trailing SUFFIX. Finally, output the result string. */
static void
perform_basename (const char *string, const char *suffix, bool use_nuls)
{
char *name = base_name (string);
strip_trailing_slashes (name);
/* Per POSIX, 'basename // /' must return '//' on platforms with
distinct //. On platforms with drive letters, this generalizes
to making 'basename c: :' return 'c:'. This rule is captured by
skipping suffix stripping if base_name returned an absolute path
or a drive letter (only possible if name is a file-system
root). */
if (suffix && IS_RELATIVE_FILE_NAME (name) && ! FILE_SYSTEM_PREFIX_LEN (name))
remove_suffix (name, suffix);
fputs (name, stdout);
putchar (use_nuls ? '\0' : '\n');
free (name);
}
int
main (int argc, char **argv)
{
bool multiple_names = false;
bool use_nuls = false;
const char *suffix = NULL;
initialize_main (&argc, &argv);
set_program_name (argv[0]);
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEDIR);
textdomain (PACKAGE);
atexit (close_stdout);
while (true)
{
int c = getopt_long (argc, argv, "+as:z", longopts, NULL);
if (c == -1)
break;
switch (c)
{
case 's':
suffix = optarg;
/* Fall through: -s implies -a. */
case 'a':
multiple_names = true;
break;
case 'z':
use_nuls = true;
break;
case_GETOPT_HELP_CHAR;
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
default:
usage (EXIT_FAILURE);
}
}
if (argc < optind + 1)
{
error (0, 0, _("missing operand"));
usage (EXIT_FAILURE);
}
if (!multiple_names && optind + 2 < argc)
{
error (0, 0, _("extra operand %s"), quote (argv[optind + 2]));
usage (EXIT_FAILURE);
}
if (multiple_names)
{
for (; optind < argc; optind++)
perform_basename (argv[optind], suffix, use_nuls);
}
else
perform_basename (argv[optind],
optind + 2 == argc ? argv[optind + 1] : NULL, use_nuls);
return EXIT_SUCCESS;
}
|
