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/* dirname -- strip suffix from file name
Copyright (C) 1990-2020 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/>. */
/* Written by David MacKenzie and Jim Meyering. */
#include <config.h>
#include <getopt.h>
#include <stdio.h>
#include <sys/types.h>
#include "system.h"
#include "error.h"
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "dirname"
#define AUTHORS \
proper_name ("David MacKenzie"), \
proper_name ("Jim Meyering")
static struct option const longopts[] =
{
{"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 [OPTION] NAME...\n\
"),
program_name);
fputs (_("\
Output each NAME with its last non-slash component and trailing slashes\n\
removed; if NAME contains no /'s, output '.' (meaning the current directory).\n\
\n\
"), stdout);
fputs (_("\
-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/ -> \"/usr\"\n\
%s dir1/str dir2/str -> \"dir1\" followed by \"dir2\"\n\
%s stdio.h -> \".\"\n\
"),
program_name, program_name, program_name);
emit_ancillary_info (PROGRAM_NAME);
}
exit (status);
}
int
main (int argc, char **argv)
{
static char const dot = '.';
bool use_nuls = false;
char const *result;
size_t len;
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, "z", longopts, NULL);
if (c == -1)
break;
switch (c)
{
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);
}
for (; optind < argc; optind++)
{
result = argv[optind];
len = dir_len (result);
if (! len)
{
result = ˙
len = 1;
}
fwrite (result, 1, len, stdout);
putchar (use_nuls ? '\0' :'\n');
}
return EXIT_SUCCESS;
}
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