676 lines
16 KiB
C
676 lines
16 KiB
C
/*
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* Mini ls implementation for busybox
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*
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* Copyright (C) 1998 by Erik Andersen <andersee@debian.org>
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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 GNU
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* General Public License for more details.
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*
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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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#if fooBar
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#include <stdio.h>
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#include <unistd.h>
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#include <dirent.h>
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#include "internal.h"
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static const char ls_usage[] = "ls [OPTION]... [FILE]...\n"
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"List information about the FILEs (the current directory by default).\n";
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int oneFlag=FALSE;
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int allFlag=FALSE;
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int directoryFlag=FALSE;
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int longFlag=FALSE;
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int typeFlag=FALSE;
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int dereferenceFlag=FALSE;
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int recursiveFlag=FALSE;
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static int fileAction(const char *fileName)
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{
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if ( allFlag==FALSE && ((strcmp(fileName, "..") == 0)
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|| (strcmp(fileName, ".") == 0)) ) {
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return( TRUE);
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}
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//struct stat statBuf;
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//if (stat(fileName, &statBuf) > 0) {
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fprintf(stdout, "%s\n", fileName);
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return( TRUE);
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//}
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//else {
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// perror(fileName);
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// return( FALSE);
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// }
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}
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static int dirAction(const char *fileName)
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{
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DIR *dir;
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struct dirent *entry;
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fprintf(stdout, "%s\n", fileName);
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dir = opendir( fileName);
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if (!dir) {
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perror("Can't open directory");
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exit(FALSE);
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}
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while ((entry = readdir(dir)) != NULL) {
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recursiveAction( entry->d_name, recursiveFlag, dereferenceFlag, FALSE, fileAction, dirAction);
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}
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return( TRUE);
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}
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int ls_main(int argc, char **argv)
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{
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if (argc <= 1) {
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char buf[NAME_MAX];
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getcwd( buf, NAME_MAX);
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dirAction( buf);
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}
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/* peel of the "ls" */
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argc--;
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argv++;
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/* Parse any options */
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while (**argv == '-') {
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while (*++(*argv)) switch (**argv) {
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case '1':
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oneFlag = TRUE;
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break;
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case 'a':
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allFlag = TRUE;
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break;
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case 'd':
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directoryFlag = TRUE;
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break;
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case 'l':
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longFlag = TRUE;
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break;
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case 'F':
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typeFlag = TRUE;
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break;
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case 'L':
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dereferenceFlag = TRUE;
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break;
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case 'R':
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recursiveFlag = TRUE;
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break;
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default:
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fprintf(stderr, "Usage: %s\n", ls_usage);
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exit( FALSE);
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}
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argc--;
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argv++;
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}
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/* Ok, ready to do the deed now */
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fprintf(stderr, "B\n");
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while (argc-- > 1) {
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fprintf(stderr, "C\n");
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recursiveAction( *argv, recursiveFlag, dereferenceFlag, fileAction, dirAction);
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}
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exit(TRUE);
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}
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#else
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#include "internal.h"
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/*
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* tiny-ls.c version 0.1.0: A minimalist 'ls'
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* Copyright (C) 1996 Brian Candler <B.Candler@pobox.com>
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* To achieve a small memory footprint, this version of 'ls' doesn't do any
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* file sorting, and only has the most essential command line switches
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* (i.e. the ones I couldn't live without :-) All features which involve
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* linking in substantial chunks of libc can be disabled.
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*
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* Although I don't really want to add new features to this program to
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* keep it small, I *am* interested to receive bug fixes and ways to make
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* it more portable.
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*
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* KNOWN BUGS:
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* 1. messy output if you mix files and directories on the command line
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* 2. ls -l of a directory doesn't give "total <blocks>" header
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* 3. ls of a symlink to a directory doesn't list directory contents
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* 4. hidden files can make column width too large
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* NON-OPTIMAL BEHAVIOUR:
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* 1. autowidth reads directories twice
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* 2. if you do a short directory listing without filetype characters
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* appended, there's no need to stat each one
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* PORTABILITY:
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* 1. requires lstat (BSD) - how do you do it without?
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*/
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#define FEATURE_USERNAME /* show username/groupnames (libc6 uses NSS) */
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#define FEATURE_TIMESTAMPS /* show file timestamps */
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#define FEATURE_AUTOWIDTH /* calculate terminal & column widths */
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#define FEATURE_FILETYPECHAR /* enable -p and -F */
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#define TERMINAL_WIDTH 80 /* use 79 if your terminal has linefold bug */
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#define COLUMN_WIDTH 14 /* default if AUTOWIDTH not defined */
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#define COLUMN_GAP 2 /* includes the file type char, if present */
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#define HAS_REWINDDIR
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/************************************************************************/
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#if 1 /* FIXME libc 6 */
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# include <linux/types.h>
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#else
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# include <sys/types.h>
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#endif
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#include <sys/stat.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <errno.h>
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#include <stdio.h>
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#ifdef FEATURE_USERNAME
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#include <pwd.h>
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#include <grp.h>
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#endif
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#ifdef FEATURE_TIMESTAMPS
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#include <time.h>
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#endif
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#define TYPEINDEX(mode) (((mode) >> 12) & 0x0f)
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#define TYPECHAR(mode) ("0pcCd?bB-?l?s???" [TYPEINDEX(mode)])
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#ifdef FEATURE_FILETYPECHAR
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#define APPCHAR(mode) ("\0|\0\0/\0\0\0\0\0@\0=\0\0\0" [TYPEINDEX(mode)])
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#endif
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#ifndef MAJOR
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#define MAJOR(dev) (((dev)>>8)&0xff)
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#define MINOR(dev) ((dev)&0xff)
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#endif
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#define MODE1 "rwxrwxrwx"
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#define MODE0 "---------"
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#define SMODE1 "..s..s..t"
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#define SMODE0 "..S..S..T"
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/* The 9 mode bits to test */
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static const umode_t MBIT[] = {
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S_IRUSR, S_IWUSR, S_IXUSR,
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S_IRGRP, S_IWGRP, S_IXGRP,
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S_IROTH, S_IWOTH, S_IXOTH
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};
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/* The special bits. If set, display SMODE0/1 instead of MODE0/1 */
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static const umode_t SBIT[] = {
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0, 0, S_ISUID,
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0, 0, S_ISGID,
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0, 0, S_ISVTX
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};
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#define FMT_AUTO 0
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#define FMT_LONG 1 /* one record per line, extended info */
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#define FMT_SINGLE 2 /* one record per line */
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#define FMT_ROWS 3 /* print across rows */
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#define FMT_COLUMNS 3 /* fill columns (same, since we don't sort) */
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#define TIME_MOD 0
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#define TIME_CHANGE 1
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#define TIME_ACCESS 2
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#define DISP_FTYPE 1 /* show character for file type */
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#define DISP_EXEC 2 /* show '*' if regular executable file */
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#define DISP_HIDDEN 4 /* show files starting . (except . and ..) */
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#define DISP_DOT 8 /* show . and .. */
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#define DISP_NUMERIC 16 /* numeric uid and gid */
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#define DISP_FULLTIME 32 /* show extended time display */
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#define DIR_NOLIST 64 /* show directory as itself, not contents */
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#define DISP_DIRNAME 128 /* show directory name (for internal use) */
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#define DIR_RECURSE 256 /* -R (not yet implemented) */
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static unsigned char display_fmt = FMT_AUTO;
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static unsigned short opts = 0;
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static unsigned short column = 0;
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#ifdef FEATURE_AUTOWIDTH
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static unsigned short terminal_width = 0, column_width = 0;
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#else
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#define terminal_width TERMINAL_WIDTH
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#define column_width COLUMN_WIDTH
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#endif
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#ifdef FEATURE_TIMESTAMPS
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static unsigned char time_fmt = TIME_MOD;
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#endif
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#define wr(data,len) fwrite(data, 1, len, stdout)
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static void writenum(long val, short minwidth)
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{
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char scratch[20];
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char *p = scratch + sizeof(scratch);
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short len = 0;
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short neg = (val < 0);
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if (neg) val = -val;
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do
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*--p = (val % 10) + '0', len++, val /= 10;
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while (val);
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if (neg)
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*--p = '-', len++;
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while (len < minwidth)
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*--p = ' ', len++;
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wr(p, len);
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column += len;
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}
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static void newline(void)
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{
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if (column > 0) {
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wr("\n", 1);
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column = 0;
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}
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}
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static void tab(short col)
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{
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static const char spaces[] = " ";
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#define nspaces ((sizeof spaces)-1) /* null terminator! */
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short n = col - column;
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if (n > 0) {
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column = col;
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while (n > nspaces) {
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wr(spaces, nspaces);
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n -= nspaces;
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}
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/* must be 1...(sizeof spaces) left */
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wr(spaces, n);
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}
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#undef nspaces
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}
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#ifdef FEATURE_FILETYPECHAR
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static char append_char(umode_t mode)
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{
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if (!(opts & DISP_FTYPE))
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return '\0';
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if ((opts & DISP_EXEC) && S_ISREG(mode) && (mode & (S_IXUSR|S_IXGRP|S_IXOTH)))
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return '*';
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return APPCHAR(mode);
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}
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#endif
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/**
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**
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** Display a file or directory as a single item
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** (in either long or short format)
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**
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**/
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static void list_single(const char *name, struct stat *info)
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{
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char scratch[20];
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short len = strlen(name);
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#ifdef FEATURE_FILETYPECHAR
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char append = append_char(info->st_mode);
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#endif
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if (display_fmt == FMT_LONG) {
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umode_t mode = info->st_mode;
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int i;
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scratch[0] = TYPECHAR(mode);
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for (i=0; i<9; i++)
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if (mode & SBIT[i])
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scratch[i+1] = (mode & MBIT[i])
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? SMODE1[i]
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: SMODE0[i];
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else
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scratch[i+1] = (mode & MBIT[i])
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? MODE1[i]
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: MODE0[i];
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newline();
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wr(scratch, 10);
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column=10;
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writenum((long)info->st_nlink,(short)4);
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fputs(" ", stdout);
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#ifdef FEATURE_USERNAME
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if (!(opts & DISP_NUMERIC)) {
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struct passwd *pw = getpwuid(info->st_uid);
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if (pw)
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fputs(pw->pw_name, stdout);
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else
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writenum((long)info->st_uid,(short)0);
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} else
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#endif
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writenum((long)info->st_uid,(short)0);
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tab(24);
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#ifdef FEATURE_USERNAME
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if (!(opts & DISP_NUMERIC)) {
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struct group *gr = getgrgid(info->st_gid);
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if (gr)
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fputs(gr->gr_name, stdout);
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else
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writenum((long)info->st_gid,(short)0);
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} else
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#endif
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writenum((long)info->st_gid,(short)0);
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tab(33);
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if (S_ISBLK(mode) || S_ISCHR(mode)) {
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writenum((long)MAJOR(info->st_rdev),(short)3);
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fputs(", ", stdout);
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writenum((long)MINOR(info->st_rdev),(short)3);
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}
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else
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writenum((long)info->st_size,(short)8);
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fputs(" ", stdout);
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#ifdef FEATURE_TIMESTAMPS
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{
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time_t cal;
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char *string;
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switch(time_fmt) {
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case TIME_CHANGE:
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cal=info->st_ctime; break;
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case TIME_ACCESS:
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cal=info->st_atime; break;
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default:
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cal=info->st_mtime; break;
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}
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string=ctime(&cal);
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if (opts & DISP_FULLTIME)
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wr(string,24);
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else {
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time_t age = time(NULL) - cal;
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wr(string+4,7); /* mmm_dd_ */
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if(age < 3600L*24*365/2 && age > -15*60)
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/* hh:mm if less than 6 months old */
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wr(string+11,5);
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else
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/* _yyyy otherwise */
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wr(string+19,5);
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}
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wr(" ", 1);
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}
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#else
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fputs("--- -- ----- ", stdout);
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#endif
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wr(name, len);
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if (S_ISLNK(mode)) {
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wr(" -> ", 4);
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len = readlink(name, scratch, sizeof scratch);
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if (len > 0) fwrite(scratch, 1, len, stdout);
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#ifdef FEATURE_FILETYPECHAR
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/* show type of destination */
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if (opts & DISP_FTYPE) {
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if (!stat(name, info)) {
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append = append_char(info->st_mode);
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if (append)
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fputc(append, stdout);
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}
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}
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#endif
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}
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#ifdef FEATURE_FILETYPECHAR
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else if (append)
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wr(&append, 1);
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#endif
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} else {
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static short nexttab = 0;
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/* sort out column alignment */
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if (column == 0)
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; /* nothing to do */
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else if (display_fmt == FMT_SINGLE)
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newline();
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else {
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if (nexttab + column_width > terminal_width
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#ifndef FEATURE_AUTOWIDTH
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|| nexttab + len >= terminal_width
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#endif
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)
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newline();
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else
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tab(nexttab);
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}
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/* work out where next column starts */
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#ifdef FEATURE_AUTOWIDTH
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/* we know the calculated width is big enough */
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nexttab = column + column_width + COLUMN_GAP;
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#else
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/* might cover more than one fixed-width column */
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nexttab = column;
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do
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nexttab += column_width + COLUMN_GAP;
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while (nexttab < (column + len + COLUMN_GAP));
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#endif
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/* now write the data */
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wr(name, len);
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column = column + len;
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#ifdef FEATURE_FILETYPECHAR
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if (append)
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wr(&append, 1), column++;
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#endif
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}
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}
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/**
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**
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** List the given file or directory, expanding a directory
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** to show its contents if required
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**
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**/
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static int list_item(const char *name)
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{
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struct stat info;
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DIR *dir;
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struct dirent *entry;
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char fullname[MAXNAMLEN+1], *fnend;
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if (lstat(name, &info))
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goto listerr;
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if (!S_ISDIR(info.st_mode) ||
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(opts & DIR_NOLIST)) {
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list_single(name, &info);
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return 0;
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}
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/* Otherwise, it's a directory we want to list the contents of */
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if (opts & DISP_DIRNAME) { /* identify the directory */
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if (column)
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wr("\n\n", 2), column = 0;
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wr(name, strlen(name));
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wr(":\n", 2);
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}
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dir = opendir(name);
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if (!dir) goto listerr;
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#ifdef FEATURE_AUTOWIDTH
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column_width = 0;
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while ((entry = readdir(dir)) != NULL) {
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short w = strlen(entry->d_name);
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if (column_width < w)
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column_width = w;
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}
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#ifdef HAS_REWINDDIR
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rewinddir(dir);
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#else
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closedir(dir);
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dir = opendir(name);
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if (!dir) goto listerr;
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#endif
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#endif
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/* List the contents */
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strcpy(fullname,name); /* *** ignore '.' by itself */
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fnend=fullname+strlen(fullname);
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if (fnend[-1] != '/')
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*fnend++ = '/';
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while ((entry = readdir(dir)) != NULL) {
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const char *en=entry->d_name;
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if (en[0] == '.') {
|
|
if (!en[1] || (en[1] == '.' && !en[2])) { /* . or .. */
|
|
if (!(opts & DISP_DOT))
|
|
continue;
|
|
}
|
|
else if (!(opts & DISP_HIDDEN))
|
|
continue;
|
|
}
|
|
/* FIXME: avoid stat if not required */
|
|
strcpy(fnend, entry->d_name);
|
|
if (lstat(fullname, &info))
|
|
goto direrr; /* (shouldn't fail) */
|
|
list_single(entry->d_name, &info);
|
|
}
|
|
closedir(dir);
|
|
return 0;
|
|
|
|
direrr:
|
|
closedir(dir);
|
|
listerr:
|
|
newline();
|
|
perror(name);
|
|
return 1;
|
|
}
|
|
|
|
const char ls_usage[] = "Usage: ls [-1a"
|
|
#ifdef FEATURE_TIMESTAMPS
|
|
"c"
|
|
#endif
|
|
"d"
|
|
#ifdef FEATURE_TIMESTAMPS
|
|
"e"
|
|
#endif
|
|
"ln"
|
|
#ifdef FEATURE_FILETYPECHAR
|
|
"p"
|
|
#endif
|
|
#ifdef FEATURE_TIMESTAMPS
|
|
"u"
|
|
#endif
|
|
"xAC"
|
|
#ifdef FEATURE_FILETYPECHAR
|
|
"F"
|
|
#endif
|
|
#ifdef FEATURE_RECURSIVE
|
|
"R"
|
|
#endif
|
|
"] [filenames...]\n";
|
|
|
|
extern int
|
|
ls_main(int argc, char * * argv)
|
|
{
|
|
int argi=1, i;
|
|
|
|
/* process options */
|
|
while (argi < argc && argv[argi][0] == '-') {
|
|
const char *p = &argv[argi][1];
|
|
|
|
if (!*p) goto print_usage_message; /* "-" by itself not allowed */
|
|
if (*p == '-') {
|
|
if (!p[1]) { /* "--" forces end of options */
|
|
argi++;
|
|
break;
|
|
}
|
|
/* it's a long option name - we don't support them */
|
|
goto print_usage_message;
|
|
}
|
|
|
|
while (*p)
|
|
switch (*p++) {
|
|
case 'l': display_fmt = FMT_LONG; break;
|
|
case '1': display_fmt = FMT_SINGLE; break;
|
|
case 'x': display_fmt = FMT_ROWS; break;
|
|
case 'C': display_fmt = FMT_COLUMNS; break;
|
|
#ifdef FEATURE_FILETYPECHAR
|
|
case 'p': opts |= DISP_FTYPE; break;
|
|
case 'F': opts |= DISP_FTYPE|DISP_EXEC; break;
|
|
#endif
|
|
case 'A': opts |= DISP_HIDDEN; break;
|
|
case 'a': opts |= DISP_HIDDEN|DISP_DOT; break;
|
|
case 'n': opts |= DISP_NUMERIC; break;
|
|
case 'd': opts |= DIR_NOLIST; break;
|
|
#ifdef FEATURE_RECURSIVE
|
|
case 'R': opts |= DIR_RECURSE; break;
|
|
#endif
|
|
#ifdef FEATURE_TIMESTAMPS
|
|
case 'u': time_fmt = TIME_ACCESS; break;
|
|
case 'c': time_fmt = TIME_CHANGE; break;
|
|
case 'e': opts |= DISP_FULLTIME; break;
|
|
#endif
|
|
default: goto print_usage_message;
|
|
}
|
|
|
|
argi++;
|
|
}
|
|
|
|
/* choose a display format */
|
|
if (display_fmt == FMT_AUTO)
|
|
display_fmt = isatty(STDOUT_FILENO) ? FMT_COLUMNS : FMT_SINGLE;
|
|
if (argi < argc - 1)
|
|
opts |= DISP_DIRNAME; /* 2 or more items? label directories */
|
|
#ifdef FEATURE_AUTOWIDTH
|
|
/* could add a -w option and/or TIOCGWINSZ call */
|
|
if (terminal_width < 1) terminal_width = TERMINAL_WIDTH;
|
|
|
|
for (i = argi; i < argc; i++) {
|
|
int len = strlen(argv[i]);
|
|
if (column_width < len)
|
|
column_width = len;
|
|
}
|
|
#endif
|
|
|
|
/* process files specified, or current directory if none */
|
|
i=0;
|
|
if (argi == argc)
|
|
i = list_item(".");
|
|
while (argi < argc)
|
|
i |= list_item(argv[argi++]);
|
|
newline();
|
|
exit( i);
|
|
|
|
print_usage_message:
|
|
fprintf(stderr, "Usage: %s\n", ls_usage);
|
|
exit( FALSE);
|
|
}
|
|
|
|
#endif
|