mirror of
git://git.sv.gnu.org/coreutils.git
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71ea30a742
NULL is best for C as discussed at: https://bugs.gnu.org/66221#53 * bootstrap.conf: Remove dependency on nullptr. * s/nullptr/NULL/.
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/* dirname -- strip suffix from file name
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Copyright (C) 1990-2026 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by David MacKenzie and Jim Meyering. */
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#include <config.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include "system.h"
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/* The official name of this program (e.g., no 'g' prefix). */
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#define PROGRAM_NAME "dirname"
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#define AUTHORS \
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proper_name ("David MacKenzie"), \
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proper_name ("Jim Meyering")
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static struct option const longopts[] =
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{
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{"zero", no_argument, NULL, 'z'},
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{GETOPT_HELP_OPTION_DECL},
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{GETOPT_VERSION_OPTION_DECL},
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{NULL, 0, NULL, 0}
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};
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void
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usage (int status)
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{
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if (status != EXIT_SUCCESS)
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emit_try_help ();
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else
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{
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printf (_("\
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Usage: %s [OPTION] NAME...\n\
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"),
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program_name);
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fputs (_("\
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Output each NAME with its last non-slash component and trailing slashes\n\
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removed; if NAME contains no /'s, output '.' (meaning the current directory).\n\
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\n\
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"), stdout);
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fputs (_("\
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-z, --zero end each output line with NUL, not newline\n\
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"), stdout);
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fputs (HELP_OPTION_DESCRIPTION, stdout);
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fputs (VERSION_OPTION_DESCRIPTION, stdout);
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printf (_("\
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\n\
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Examples:\n\
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%s /usr/bin/ -> \"/usr\"\n\
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%s dir1/str dir2/str -> \"dir1\" followed by \"dir2\"\n\
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%s stdio.h -> \".\"\n\
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"),
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program_name, program_name, program_name);
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emit_ancillary_info (PROGRAM_NAME);
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}
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exit (status);
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}
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int
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main (int argc, char **argv)
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{
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bool use_nuls = false;
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initialize_main (&argc, &argv);
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set_program_name (argv[0]);
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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atexit (close_stdout);
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while (true)
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{
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int c = getopt_long (argc, argv, "z", longopts, NULL);
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if (c == -1)
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break;
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switch (c)
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{
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case 'z':
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use_nuls = true;
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break;
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case_GETOPT_HELP_CHAR;
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case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
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default:
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usage (EXIT_FAILURE);
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}
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}
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if (argc < optind + 1)
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{
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error (0, 0, _("missing operand"));
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usage (EXIT_FAILURE);
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}
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for (; optind < argc; optind++)
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{
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char const *result = argv[optind];
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idx_t len = dir_len (result);
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if (! len)
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{
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static char const dot = '.';
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result = ˙
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len = 1;
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}
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fwrite (result, 1, len, stdout);
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putchar (use_nuls ? '\0' :'\n');
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}
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return EXIT_SUCCESS;
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}
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