1 /* dirname -- strip suffix from file name
3 Copyright (C) 1990-2013 Free Software Foundation, Inc.
5 This program 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.
10 This program is distributed in the hope that it will be useful,
11 but 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.
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/>. */
18 /* Written by David MacKenzie and Jim Meyering. */
23 #include <sys/types.h>
28 /* The official name of this program (e.g., no 'g' prefix). */
29 #define PROGRAM_NAME "dirname"
32 proper_name ("David MacKenzie"), \
33 proper_name ("Jim Meyering")
35 static struct option const longopts[] =
37 {"zero", no_argument, NULL, 'z'},
38 {GETOPT_HELP_OPTION_DECL},
39 {GETOPT_VERSION_OPTION_DECL},
46 if (status != EXIT_SUCCESS)
51 Usage: %s [OPTION] NAME...\n\
55 Output each NAME with its last non-slash component and trailing slashes\n\
56 removed; if NAME contains no /'s, output '.' (meaning the current directory).\n\
60 -z, --zero separate output with NUL rather than newline\n\
62 fputs (HELP_OPTION_DESCRIPTION, stdout);
63 fputs (VERSION_OPTION_DESCRIPTION, stdout);
67 %s /usr/bin/ -> \"/usr\"\n\
68 %s dir1/str dir2/str -> \"dir1\" followed by \"dir2\"\n\
69 %s stdio.h -> \".\"\n\
71 program_name, program_name, program_name);
72 emit_ancillary_info ();
78 main (int argc, char **argv)
80 static char const dot = '.';
81 bool use_nuls = false;
85 initialize_main (&argc, &argv);
86 set_program_name (argv[0]);
87 setlocale (LC_ALL, "");
88 bindtextdomain (PACKAGE, LOCALEDIR);
91 atexit (close_stdout);
95 int c = getopt_long (argc, argv, "z", longopts, NULL);
106 case_GETOPT_HELP_CHAR;
107 case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
110 usage (EXIT_FAILURE);
114 if (argc < optind + 1)
116 error (0, 0, _("missing operand"));
117 usage (EXIT_FAILURE);
120 for (; optind < argc; optind++)
122 result = argv[optind];
123 len = dir_len (result);
131 fwrite (result, 1, len, stdout);
132 putchar (use_nuls ? '\0' :'\n');