/* basename -- strip directory and suffix from file names This is the basename utility
Copyright (C) 1990-2018 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 <https://www.gnu.org/licenses/>. */ The GNUv3 license
#include <config.h> Provides system specific information
#include <getopt.h> ...!includes auto-comment...
#include <stdio.h> Provides standard I/O capability
#include <sys/types.h> Provides system data types
#include "system.h" ...!includes auto-comment...
#include "error.h" ...!includes auto-comment...
#include "quote.h" ...!includes auto-comment...
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "basename" Line 27
#define AUTHORS proper_name ("David MacKenzie") Line 29
static struct option const longopts[] = Line 31
{
{"multiple", no_argument, NULL, 'a'}, Line 33
{"suffix", required_argument, NULL, 's'}, Line 34
{"zero", no_argument, NULL, 'z'}, Line 35
{GETOPT_HELP_OPTION_DECL}, Line 36
{GETOPT_VERSION_OPTION_DECL}, Line 37
{NULL, 0, NULL, 0} Line 38
}; Block 1
void Line 41
usage (int status) Line 42
{
if (status != EXIT_SUCCESS) Line 44
emit_try_help (); ...!common auto-comment...
else Line 46
{
printf (_("\ Line 48
Usage: %s NAME [SUFFIX]\n\ Line 49
or: %s OPTION... NAME...\n\ Line 50
"), Line 51
program_name, program_name); Line 52
fputs (_("\ Line 53
Print NAME with any leading directory components removed.\n\ Line 54
If specified, also remove a trailing SUFFIX.\n\ Line 55
"), stdout); Line 56
emit_mandatory_arg_note (); ...!common auto-comment...
fputs (_("\ Line 60
-a, --multiple support multiple arguments and treat each as a NAME\n\ Line 61
-s, --suffix=SUFFIX remove a trailing SUFFIX; implies -a\n\ Line 62
-z, --zero end each output line with NUL, not newline\n\ Line 63
"), stdout); Line 64
fputs (HELP_OPTION_DESCRIPTION, stdout); Line 65
fputs (VERSION_OPTION_DESCRIPTION, stdout); Line 66
printf (_("\ Line 67
\n\
Examples:\n\ Line 69
%s /usr/bin/sort -> \"sort\"\n\ Line 70
%s include/stdio.h .h -> \"stdio\"\n\ Provides standard I/O capability
%s -s .h include/stdio.h -> \"stdio\"\n\ Provides standard I/O capability
%s -a any/str1 any/str2 -> \"str1\" followed by \"str2\"\n\ Line 73
"), Line 74
program_name, program_name, program_name, program_name); Line 75
emit_ancillary_info (PROGRAM_NAME); Line 76
}
exit (status); Line 78
} Block 2
/* Remove SUFFIX from the end of NAME if it is there, unless NAME
consists entirely of SUFFIX. */
static void Line 84
remove_suffix (char *name, const char *suffix) Line 85
{
char *np; Line 87
const char *sp; Line 88
np = name + strlen (name); Line 90
sp = suffix + strlen (suffix); Line 91
while (np > name && sp > suffix) Line 93
if (*--np != *--sp) Line 94
return; Line 95
if (np > name) Line 96
*np = '\0'; Line 97
} Block 3
/* Perform the basename operation on STRING. If SUFFIX is non-NULL, remove
the trailing SUFFIX. Finally, output the result string. */
static void Line 103
perform_basename (const char *string, const char *suffix, bool use_nuls) Line 104
{
char *name = base_name (string); Line 106
strip_trailing_slashes (name); Line 107
/* Per POSIX, 'basename // /' must return '//' on platforms with
distinct //. On platforms with drive letters, this generalizes Line 110
to making 'basename c: :' return 'c:'. This rule is captured by Line 111
skipping suffix stripping if base_name returned an absolute path Line 112
or a drive letter (only possible if name is a file-system Line 113
root). */
if (suffix && IS_RELATIVE_FILE_NAME (name) && ! FILE_SYSTEM_PREFIX_LEN (name))Line 115
remove_suffix (name, suffix); Line 116
fputs (name, stdout); Line 118
putchar (use_nuls ? '\0' : '\n'); Line 119
free (name); Line 120
} Block 4
int
main (int argc, char **argv) Line 124
{
bool multiple_names = false; Line 126
bool use_nuls = false; Line 127
const char *suffix = NULL; Line 128
initialize_main (&argc, &argv); VMS-specific entry point handling wildcard expansion
set_program_name (argv[0]); Retains program name and discards path
setlocale (LC_ALL, ""); Sets up internationalization (i18n)
bindtextdomain (PACKAGE, LOCALEDIR); Assigns i18n directorySets text domain for _() [gettext()] function
textdomain (PACKAGE); Sets text domain for _() [gettext()] function
atexit (close_stdout); Close stdout on exit (see gnulib)
while (true) Line 138
{
int c = getopt_long (argc, argv, "+as:z", longopts, NULL); Line 140
if (c == -1) Line 142
break; Line 143
switch (c) Line 145
{
case 's': Line 147
suffix = optarg; Line 148
/* -s implies -a, so... */
FALLTHROUGH; Line 150
case 'a': Line 152
multiple_names = true; Line 153
break; Line 154
case 'z': Line 156
use_nuls = true; Line 157
break; Line 158
case_GETOPT_HELP_CHAR; Line 160
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS); Line 161
default: Line 163
usage (EXIT_FAILURE); Line 164
}
}
if (argc < optind + 1) Line 168
{
error (0, 0, _("missing operand")); Line 170
usage (EXIT_FAILURE); Line 171
}
if (!multiple_names && optind + 2 < argc) Line 174
{
error (0, 0, _("extra operand %s"), quote (argv[optind + 2])); Line 176
usage (EXIT_FAILURE); Line 177
}
if (multiple_names) Line 180
{
for (; optind < argc; optind++) Line 182
perform_basename (argv[optind], suffix, use_nuls); Line 183
}
else Line 185
perform_basename (argv[optind], Line 186
optind + 2 == argc ? argv[optind + 1] : NULL, use_nuls); Line 187
return EXIT_SUCCESS; Line 189
} Block 5