702 lines
17 KiB
C
702 lines
17 KiB
C
/* $NetBSD: ls.c,v 1.70 2012/11/20 12:37:29 abs Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Michael Fischbein.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94";
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#else
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__RCSID("$NetBSD: ls.c,v 1.70 2012/11/20 12:37:29 abs Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <fts.h>
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#include <locale.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <termios.h>
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#include <pwd.h>
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#include <grp.h>
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#include <util.h>
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#include "ls.h"
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#include "extern.h"
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static void display(FTSENT *, FTSENT *);
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static int mastercmp(const FTSENT **, const FTSENT **);
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static void traverse(int, char **, int);
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static void (*printfcn)(DISPLAY *);
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static int (*sortfcn)(const FTSENT *, const FTSENT *);
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#define BY_NAME 0
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#define BY_SIZE 1
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#define BY_TIME 2
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long blocksize; /* block size units */
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int termwidth = 80; /* default terminal width */
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int sortkey = BY_NAME;
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int rval = EXIT_SUCCESS; /* exit value - set if error encountered */
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/* flags */
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int f_accesstime; /* use time of last access */
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int f_column; /* columnated format */
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int f_columnacross; /* columnated format, sorted across */
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int f_flags; /* show flags associated with a file */
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int f_grouponly; /* long listing without owner */
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int f_humanize; /* humanize the size field */
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int f_commas; /* separate size field with comma */
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int f_inode; /* print inode */
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int f_listdir; /* list actual directory, not contents */
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int f_listdot; /* list files beginning with . */
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int f_longform; /* long listing format */
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int f_nonprint; /* show unprintables as ? */
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int f_nosort; /* don't sort output */
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int f_numericonly; /* don't convert uid/gid to name */
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int f_octal; /* print octal escapes for nongraphic characters */
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int f_octal_escape; /* like f_octal but use C escapes if possible */
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int f_recursive; /* ls subdirectories also */
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int f_reversesort; /* reverse whatever sort is used */
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int f_sectime; /* print the real time for all files */
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int f_singlecol; /* use single column output */
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int f_size; /* list size in short listing */
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int f_statustime; /* use time of last mode change */
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int f_stream; /* stream format */
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int f_type; /* add type character for non-regular files */
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int f_typedir; /* add type character for directories */
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int f_whiteout; /* show whiteout entries */
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__dead static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: %s [-1AaBbCcdFfghikLlMmnopqRrSsTtuWwx] [file ...]\n",
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getprogname());
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exit(EXIT_FAILURE);
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/* NOTREACHED */
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}
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int
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ls_main(int argc, char *argv[])
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{
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static char dot[] = ".", *dotav[] = { dot, NULL };
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struct winsize win;
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int ch, fts_options;
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int kflag = 0;
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const char *p;
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setprogname(argv[0]);
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(void)setlocale(LC_ALL, "");
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/* Terminal defaults to -Cq, non-terminal defaults to -1. */
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if (isatty(STDOUT_FILENO)) {
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 &&
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win.ws_col > 0)
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termwidth = win.ws_col;
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f_column = f_nonprint = 1;
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} else
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f_singlecol = 1;
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/* Root is -A automatically. */
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if (!getuid())
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f_listdot = 1;
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fts_options = FTS_PHYSICAL;
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while ((ch = getopt(argc, argv, "1ABCFLMRSTWabcdfghiklmnopqrstuwx")) != -1) {
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switch (ch) {
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/*
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* The -1, -C, -l, -m and -x options all override each other so
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* shell aliasing works correctly.
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*/
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case '1':
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f_singlecol = 1;
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f_column = f_columnacross = f_longform = f_stream = 0;
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break;
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case 'C':
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f_column = 1;
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f_columnacross = f_longform = f_singlecol = f_stream =
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0;
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break;
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case 'g':
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if (f_grouponly != -1)
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f_grouponly = 1;
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f_longform = 1;
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f_column = f_columnacross = f_singlecol = f_stream = 0;
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break;
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case 'l':
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f_longform = 1;
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f_column = f_columnacross = f_singlecol = f_stream = 0;
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/* Never let -g take precedence over -l. */
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f_grouponly = -1;
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break;
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case 'm':
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f_stream = 1;
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f_column = f_columnacross = f_longform = f_singlecol =
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0;
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break;
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case 'x':
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f_columnacross = 1;
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f_column = f_longform = f_singlecol = f_stream = 0;
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break;
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/* The -c and -u options override each other. */
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case 'c':
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f_statustime = 1;
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f_accesstime = 0;
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break;
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case 'u':
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f_accesstime = 1;
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f_statustime = 0;
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break;
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case 'F':
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f_type = 1;
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break;
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case 'L':
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fts_options &= ~FTS_PHYSICAL;
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fts_options |= FTS_LOGICAL;
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break;
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case 'R':
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f_recursive = 1;
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break;
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case 'a':
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fts_options |= FTS_SEEDOT;
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/* FALLTHROUGH */
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case 'A':
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f_listdot = 1;
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break;
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/* The -B option turns off the -b, -q and -w options. */
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case 'B':
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f_nonprint = 0;
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f_octal = 1;
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f_octal_escape = 0;
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break;
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/* The -b option turns off the -B, -q and -w options. */
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case 'b':
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f_nonprint = 0;
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f_octal = 0;
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f_octal_escape = 1;
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break;
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/* The -d option turns off the -R option. */
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case 'd':
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f_listdir = 1;
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f_recursive = 0;
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break;
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case 'f':
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f_nosort = 1;
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break;
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case 'i':
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f_inode = 1;
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break;
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case 'k':
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blocksize = 1024;
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kflag = 1;
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f_humanize = 0;
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break;
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/* The -h option forces all sizes to be measured in bytes. */
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case 'h':
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f_humanize = 1;
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kflag = 0;
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f_commas = 0;
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break;
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case 'M':
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f_humanize = 0;
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f_commas = 1;
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break;
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case 'n':
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f_numericonly = 1;
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f_longform = 1;
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f_column = f_columnacross = f_singlecol = f_stream = 0;
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break;
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case 'o':
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f_flags = 1;
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break;
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case 'p':
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f_typedir = 1;
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break;
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/* The -q option turns off the -B, -b and -w options. */
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case 'q':
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f_nonprint = 1;
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f_octal = 0;
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f_octal_escape = 0;
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break;
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case 'r':
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f_reversesort = 1;
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break;
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case 'S':
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sortkey = BY_SIZE;
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break;
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case 's':
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f_size = 1;
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break;
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case 'T':
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f_sectime = 1;
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break;
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case 't':
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sortkey = BY_TIME;
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break;
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case 'W':
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f_whiteout = 1;
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break;
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/* The -w option turns off the -B, -b and -q options. */
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case 'w':
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f_nonprint = 0;
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f_octal = 0;
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f_octal_escape = 0;
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break;
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default:
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case '?':
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (f_column || f_columnacross || f_stream) {
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if ((p = getenv("COLUMNS")) != NULL)
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termwidth = atoi(p);
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}
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/*
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* If both -g and -l options, let -l take precedence.
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*/
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if (f_grouponly == -1)
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f_grouponly = 0;
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/*
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* If not -F, -i, -l, -p, -S, -s or -t options, don't require stat
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* information.
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*/
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if (!f_inode && !f_longform && !f_size && !f_type && !f_typedir &&
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sortkey == BY_NAME)
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fts_options |= FTS_NOSTAT;
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/*
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* If not -F, -d or -l options, follow any symbolic links listed on
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* the command line.
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*/
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if (!f_longform && !f_listdir && !f_type)
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fts_options |= FTS_COMFOLLOW;
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/*
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* If -W, show whiteout entries
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*/
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#ifdef FTS_WHITEOUT
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if (f_whiteout)
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fts_options |= FTS_WHITEOUT;
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#endif
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/* If -i, -l, or -s, figure out block size. */
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if (f_inode || f_longform || f_size) {
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if (!kflag)
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(void)getbsize(NULL, &blocksize);
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blocksize /= 512;
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}
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/* Select a sort function. */
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if (f_reversesort) {
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switch (sortkey) {
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case BY_NAME:
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sortfcn = revnamecmp;
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break;
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case BY_SIZE:
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sortfcn = revsizecmp;
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break;
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case BY_TIME:
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if (f_accesstime)
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sortfcn = revacccmp;
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else if (f_statustime)
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sortfcn = revstatcmp;
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else /* Use modification time. */
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sortfcn = revmodcmp;
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break;
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}
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} else {
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switch (sortkey) {
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case BY_NAME:
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sortfcn = namecmp;
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break;
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case BY_SIZE:
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sortfcn = sizecmp;
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break;
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case BY_TIME:
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if (f_accesstime)
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sortfcn = acccmp;
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else if (f_statustime)
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sortfcn = statcmp;
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else /* Use modification time. */
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sortfcn = modcmp;
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break;
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}
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}
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/* Select a print function. */
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if (f_singlecol)
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printfcn = printscol;
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else if (f_columnacross)
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printfcn = printacol;
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else if (f_longform)
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printfcn = printlong;
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else if (f_stream)
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printfcn = printstream;
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else
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printfcn = printcol;
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if (argc)
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traverse(argc, argv, fts_options);
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else
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traverse(1, dotav, fts_options);
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return rval;
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/* NOTREACHED */
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}
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static int output; /* If anything output. */
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/*
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* Traverse() walks the logical directory structure specified by the argv list
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* in the order specified by the mastercmp() comparison function. During the
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* traversal it passes linked lists of structures to display() which represent
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* a superset (may be exact set) of the files to be displayed.
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*/
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static void
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traverse(int argc, char *argv[], int options)
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{
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FTS *ftsp;
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FTSENT *p, *chp;
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int ch_options, error;
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if ((ftsp =
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fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
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err(EXIT_FAILURE, NULL);
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display(NULL, fts_children(ftsp, 0));
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if (f_listdir) {
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(void)fts_close(ftsp);
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return;
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}
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/*
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* If not recursing down this tree and don't need stat info, just get
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* the names.
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*/
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ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
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while ((p = fts_read(ftsp)) != NULL)
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switch (p->fts_info) {
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case FTS_DC:
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warnx("%s: directory causes a cycle", p->fts_name);
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break;
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case FTS_DNR:
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case FTS_ERR:
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warnx("%s: %s", p->fts_name, strerror(p->fts_errno));
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rval = EXIT_FAILURE;
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break;
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case FTS_D:
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if (p->fts_level != FTS_ROOTLEVEL &&
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p->fts_name[0] == '.' && !f_listdot)
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break;
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/*
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* If already output something, put out a newline as
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* a separator. If multiple arguments, precede each
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* directory with its name.
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*/
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if (output)
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(void)printf("\n%s:\n", p->fts_path);
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else if (argc > 1) {
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(void)printf("%s:\n", p->fts_path);
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output = 1;
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}
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chp = fts_children(ftsp, ch_options);
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display(p, chp);
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if (!f_recursive && chp != NULL)
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(void)fts_set(ftsp, p, FTS_SKIP);
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break;
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}
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error = errno;
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(void)fts_close(ftsp);
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errno = error;
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if (errno)
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err(EXIT_FAILURE, "fts_read");
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}
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/*
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* Display() takes a linked list of FTSENT structures and passes the list
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* along with any other necessary information to the print function. P
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* points to the parent directory of the display list.
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*/
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static void
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display(FTSENT *p, FTSENT *list)
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{
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struct stat *sp;
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DISPLAY d;
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FTSENT *cur;
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NAMES *np;
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u_int64_t btotal, stotal;
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off_t maxsize;
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blkcnt_t maxblock;
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ino_t maxinode;
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int maxmajor, maxminor;
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uint32_t maxnlink;
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int bcfile, entries, flen, glen, ulen, maxflags, maxgroup;
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unsigned int maxlen;
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int maxuser, needstats;
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const char *user, *group;
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char buf[21]; /* 64 bits == 20 digits, +1 for NUL */
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char nuser[12], ngroup[12];
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char *flags = NULL;
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/*
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* If list is NULL there are two possibilities: that the parent
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* directory p has no children, or that fts_children() returned an
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* error. We ignore the error case since it will be replicated
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* on the next call to fts_read() on the post-order visit to the
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* directory p, and will be signalled in traverse().
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*/
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if (list == NULL)
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return;
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needstats = f_inode || f_longform || f_size;
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flen = 0;
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maxinode = maxnlink = 0;
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bcfile = 0;
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maxuser = maxgroup = maxflags = maxlen = 0;
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btotal = stotal = maxblock = maxsize = 0;
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maxmajor = maxminor = 0;
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for (cur = list, entries = 0; cur; cur = cur->fts_link) {
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if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
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warnx("%s: %s",
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cur->fts_name, strerror(cur->fts_errno));
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cur->fts_number = NO_PRINT;
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rval = EXIT_FAILURE;
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continue;
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}
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/*
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* P is NULL if list is the argv list, to which different rules
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* apply.
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*/
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if (p == NULL) {
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/* Directories will be displayed later. */
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|
if (cur->fts_info == FTS_D && !f_listdir) {
|
|
cur->fts_number = NO_PRINT;
|
|
continue;
|
|
}
|
|
} else {
|
|
/* Only display dot file if -a/-A set. */
|
|
if (cur->fts_name[0] == '.' && !f_listdot) {
|
|
cur->fts_number = NO_PRINT;
|
|
continue;
|
|
}
|
|
}
|
|
if (cur->fts_namelen > maxlen)
|
|
maxlen = cur->fts_namelen;
|
|
if (needstats) {
|
|
sp = cur->fts_statp;
|
|
if (sp->st_blocks > maxblock)
|
|
maxblock = sp->st_blocks;
|
|
if (sp->st_ino > maxinode)
|
|
maxinode = sp->st_ino;
|
|
if (sp->st_nlink > maxnlink)
|
|
maxnlink = sp->st_nlink;
|
|
if (sp->st_size > maxsize)
|
|
maxsize = sp->st_size;
|
|
if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) {
|
|
bcfile = 1;
|
|
if (major(sp->st_rdev) > maxmajor)
|
|
maxmajor = major(sp->st_rdev);
|
|
if (minor(sp->st_rdev) > maxminor)
|
|
maxminor = minor(sp->st_rdev);
|
|
}
|
|
|
|
btotal += sp->st_blocks;
|
|
stotal += sp->st_size;
|
|
if (f_longform) {
|
|
if (f_numericonly ||
|
|
(user = user_from_uid(sp->st_uid, 0)) ==
|
|
NULL) {
|
|
(void)snprintf(nuser, sizeof(nuser),
|
|
"%u", sp->st_uid);
|
|
user = nuser;
|
|
}
|
|
if (f_numericonly ||
|
|
(group = group_from_gid(sp->st_gid, 0)) ==
|
|
NULL) {
|
|
(void)snprintf(ngroup, sizeof(ngroup),
|
|
"%u", sp->st_gid);
|
|
group = ngroup;
|
|
}
|
|
if ((ulen = strlen(user)) > maxuser)
|
|
maxuser = ulen;
|
|
if ((glen = strlen(group)) > maxgroup)
|
|
maxgroup = glen;
|
|
if (f_flags) {
|
|
flags =
|
|
flags_to_string((u_long)sp->st_flags, "-");
|
|
if ((flen = strlen(flags)) > maxflags)
|
|
maxflags = flen;
|
|
} else
|
|
flen = 0;
|
|
|
|
if ((np = malloc(sizeof(NAMES) +
|
|
ulen + glen + flen + 2)) == NULL)
|
|
err(EXIT_FAILURE, NULL);
|
|
|
|
np->user = &np->data[0];
|
|
(void)strcpy(np->user, user);
|
|
np->group = &np->data[ulen + 1];
|
|
(void)strcpy(np->group, group);
|
|
|
|
if (f_flags) {
|
|
np->flags = &np->data[ulen + glen + 2];
|
|
(void)strcpy(np->flags, flags);
|
|
free(flags);
|
|
}
|
|
cur->fts_pointer = np;
|
|
}
|
|
}
|
|
++entries;
|
|
}
|
|
|
|
if (!entries)
|
|
return;
|
|
|
|
d.list = list;
|
|
d.entries = entries;
|
|
d.maxlen = maxlen;
|
|
if (needstats) {
|
|
d.btotal = btotal;
|
|
d.stotal = stotal;
|
|
if (f_humanize) {
|
|
d.s_block = 4; /* min buf length for humanize_number */
|
|
} else {
|
|
(void)snprintf(buf, sizeof(buf), "%llu",
|
|
(long long)howmany(maxblock, blocksize));
|
|
d.s_block = strlen(buf);
|
|
if (f_commas) /* allow for commas before every third digit */
|
|
d.s_block += (d.s_block - 1) / 3;
|
|
}
|
|
d.s_flags = maxflags;
|
|
d.s_group = maxgroup;
|
|
(void)snprintf(buf, sizeof(buf), "%llu",
|
|
(unsigned long long)maxinode);
|
|
d.s_inode = strlen(buf);
|
|
(void)snprintf(buf, sizeof(buf), "%u", maxnlink);
|
|
d.s_nlink = strlen(buf);
|
|
if (f_humanize) {
|
|
d.s_size = 4; /* min buf length for humanize_number */
|
|
} else {
|
|
(void)snprintf(buf, sizeof(buf), "%llu",
|
|
(long long)maxsize);
|
|
d.s_size = strlen(buf);
|
|
if (f_commas) /* allow for commas before every third digit */
|
|
d.s_size += (d.s_size - 1) / 3;
|
|
}
|
|
d.s_user = maxuser;
|
|
if (bcfile) {
|
|
(void)snprintf(buf, sizeof(buf), "%u", maxmajor);
|
|
d.s_major = strlen(buf);
|
|
(void)snprintf(buf, sizeof(buf), "%u", maxminor);
|
|
d.s_minor = strlen(buf);
|
|
if (d.s_major + d.s_minor + 2 > d.s_size)
|
|
d.s_size = d.s_major + d.s_minor + 2;
|
|
else if (d.s_size - d.s_minor - 2 > d.s_major)
|
|
d.s_major = d.s_size - d.s_minor - 2;
|
|
} else {
|
|
d.s_major = 0;
|
|
d.s_minor = 0;
|
|
}
|
|
}
|
|
|
|
printfcn(&d);
|
|
output = 1;
|
|
|
|
if (f_longform)
|
|
for (cur = list; cur; cur = cur->fts_link)
|
|
free(cur->fts_pointer);
|
|
}
|
|
|
|
/*
|
|
* Ordering for mastercmp:
|
|
* If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
|
|
* as larger than directories. Within either group, use the sort function.
|
|
* All other levels use the sort function. Error entries remain unsorted.
|
|
*/
|
|
static int
|
|
mastercmp(const FTSENT **a, const FTSENT **b)
|
|
{
|
|
int a_info, b_info;
|
|
|
|
a_info = (*a)->fts_info;
|
|
if (a_info == FTS_ERR)
|
|
return (0);
|
|
b_info = (*b)->fts_info;
|
|
if (b_info == FTS_ERR)
|
|
return (0);
|
|
|
|
if (a_info == FTS_NS || b_info == FTS_NS) {
|
|
if (b_info != FTS_NS)
|
|
return (1);
|
|
else if (a_info != FTS_NS)
|
|
return (-1);
|
|
else
|
|
return (namecmp(*a, *b));
|
|
}
|
|
|
|
if (a_info != b_info && !f_listdir &&
|
|
(*a)->fts_level == FTS_ROOTLEVEL) {
|
|
if (a_info == FTS_D)
|
|
return (1);
|
|
else if (b_info == FTS_D)
|
|
return (-1);
|
|
}
|
|
return (sortfcn(*a, *b));
|
|
}
|