1077 lines
27 KiB
C
1077 lines
27 KiB
C
/* vi: set sw=4 ts=4: */
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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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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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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. ls -l of a directory doesn't give "total <blocks>" header
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* 2. ls of a symlink to a directory doesn't list directory contents
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* 3. hidden files can make column width too large
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*
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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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enum {
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TERMINAL_WIDTH = 80, /* use 79 if terminal has linefold bug */
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COLUMN_GAP = 2, /* includes the file type char */
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};
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/************************************************************************/
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#include "busybox.h"
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#include <getopt.h>
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/* what is the overall style of the listing */
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#define STYLE_COLUMNS (1U<<21) /* fill columns */
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#define STYLE_LONG (2U<<21) /* one record per line, extended info */
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#define STYLE_SINGLE (3U<<21) /* one record per line */
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#define STYLE_MASK STYLE_SINGLE
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#define STYLE_ONE_RECORD_FLAG STYLE_LONG
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/* 51306 lrwxrwxrwx 1 root root 2 May 11 01:43 /bin/view -> vi* */
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/* what file information will be listed */
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#define LIST_INO (1U<<0)
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#define LIST_BLOCKS (1U<<1)
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#define LIST_MODEBITS (1U<<2)
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#define LIST_NLINKS (1U<<3)
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#define LIST_ID_NAME (1U<<4)
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#define LIST_ID_NUMERIC (1U<<5)
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#define LIST_CONTEXT (1U<<6)
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#define LIST_SIZE (1U<<7)
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#define LIST_DEV (1U<<8)
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#define LIST_DATE_TIME (1U<<9)
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#define LIST_FULLTIME (1U<<10)
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#define LIST_FILENAME (1U<<11)
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#define LIST_SYMLINK (1U<<12)
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#define LIST_FILETYPE (1U<<13)
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#define LIST_EXEC (1U<<14)
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#define LIST_MASK ((LIST_EXEC << 1) - 1)
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/* what files will be displayed */
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#define DISP_DIRNAME (1U<<15) /* 2 or more items? label directories */
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#define DISP_HIDDEN (1U<<16) /* show filenames starting with . */
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#define DISP_DOT (1U<<17) /* show . and .. */
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#define DISP_NOLIST (1U<<18) /* show directory as itself, not contents */
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#define DISP_RECURSIVE (1U<<19) /* show directory and everything below it */
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#define DISP_ROWS (1U<<20) /* print across rows */
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#define DISP_MASK (((DISP_ROWS << 1) - 1) & ~(DISP_DIRNAME - 1))
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// CONFIG_FEATURE_LS_SORTFILES
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/* how will the files be sorted */
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#define SORT_ORDER_FORWARD 0 /* sort in reverse order */
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#define SORT_ORDER_REVERSE (1U<<27) /* sort in reverse order */
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#define SORT_NAME 0 /* sort by file name */
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#define SORT_SIZE (1U<<28) /* sort by file size */
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#define SORT_ATIME (2U<<28) /* sort by last access time */
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#define SORT_CTIME (3U<<28) /* sort by last change time */
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#define SORT_MTIME (4U<<28) /* sort by last modification time */
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#define SORT_VERSION (5U<<28) /* sort by version */
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#define SORT_EXT (6U<<28) /* sort by file name extension */
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#define SORT_DIR (7U<<28) /* sort by file or directory */
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#define SORT_MASK (7U<<28)
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/* which of the three times will be used */
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#define TIME_CHANGE ((1U<<23) * ENABLE_FEATURE_LS_TIMESTAMPS)
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#define TIME_ACCESS ((1U<<24) * ENABLE_FEATURE_LS_TIMESTAMPS)
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#define TIME_MASK ((3U<<23) * ENABLE_FEATURE_LS_TIMESTAMPS)
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#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
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#define FOLLOW_LINKS (1U<<25)
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#endif
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#ifdef CONFIG_FEATURE_HUMAN_READABLE
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#define LS_DISP_HR (1U<<26)
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#endif
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#define LIST_SHORT (LIST_FILENAME)
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#define LIST_ISHORT (LIST_INO | LIST_FILENAME)
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#define LIST_LONG (LIST_MODEBITS | LIST_NLINKS | LIST_ID_NAME | LIST_SIZE | \
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LIST_DATE_TIME | LIST_FILENAME | LIST_SYMLINK)
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#define LIST_ILONG (LIST_INO | LIST_LONG)
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#define SPLIT_DIR 1
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#define SPLIT_FILE 0
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#define SPLIT_SUBDIR 2
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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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#if defined(CONFIG_FEATURE_LS_FILETYPES) || defined(CONFIG_FEATURE_LS_COLOR)
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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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/* colored LS support by JaWi, janwillem.janssen@lxtreme.nl */
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#ifdef CONFIG_FEATURE_LS_COLOR
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static int show_color = 0;
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/* long option entry used only for --color, which has no short option
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* equivalent. */
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static const struct option ls_color_opt[] =
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{
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{"color", optional_argument, NULL, 1},
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{NULL, 0, NULL, 0}
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};
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#define COLOR(mode) ("\000\043\043\043\042\000\043\043"\
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"\000\000\044\000\043\000\000\040" [TYPEINDEX(mode)])
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#define ATTR(mode) ("\00\00\01\00\01\00\01\00"\
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"\00\00\01\00\01\00\00\01" [TYPEINDEX(mode)])
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#endif
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/*
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* a directory entry and its stat info are stored here
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*/
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struct dnode { /* the basic node */
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char *name; /* the dir entry name */
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char *fullname; /* the dir entry name */
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int allocated;
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struct stat dstat; /* the file stat info */
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#ifdef CONFIG_SELINUX
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security_context_t sid;
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#endif
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struct dnode *next; /* point at the next node */
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};
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typedef struct dnode dnode_t;
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static struct dnode **list_dir(const char *);
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static struct dnode **dnalloc(int);
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static int list_single(struct dnode *);
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static unsigned int all_fmt;
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#ifdef CONFIG_FEATURE_AUTOWIDTH
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static unsigned terminal_width = TERMINAL_WIDTH;
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static unsigned tabstops = COLUMN_GAP;
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#else
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#define tabstops COLUMN_GAP
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#define terminal_width TERMINAL_WIDTH
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#endif
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static int status = EXIT_SUCCESS;
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static struct dnode *my_stat(char *fullname, char *name)
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{
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struct stat dstat;
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struct dnode *cur;
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#ifdef CONFIG_SELINUX
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security_context_t sid=NULL;
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#endif
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#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
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if (all_fmt & FOLLOW_LINKS) {
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#ifdef CONFIG_SELINUX
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if (is_selinux_enabled()) {
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getfilecon(fullname,&sid);
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}
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#endif
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if (stat(fullname, &dstat)) {
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bb_perror_msg("%s", fullname);
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status = EXIT_FAILURE;
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return 0;
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}
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} else
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#endif
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{
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#ifdef CONFIG_SELINUX
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if (is_selinux_enabled()) {
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lgetfilecon(fullname,&sid);
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}
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#endif
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if (lstat(fullname, &dstat)) {
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bb_perror_msg("%s", fullname);
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status = EXIT_FAILURE;
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return 0;
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}
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}
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cur = (struct dnode *) xmalloc(sizeof(struct dnode));
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cur->fullname = fullname;
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cur->name = name;
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cur->dstat = dstat;
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#ifdef CONFIG_SELINUX
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cur->sid = sid;
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#endif
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return cur;
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}
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/*----------------------------------------------------------------------*/
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#ifdef CONFIG_FEATURE_LS_COLOR
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static char fgcolor(mode_t mode)
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{
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/* Check wheter the file is existing (if so, color it red!) */
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if (errno == ENOENT) {
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return '\037';
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}
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if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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return COLOR(0xF000); /* File is executable ... */
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return COLOR(mode);
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}
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/*----------------------------------------------------------------------*/
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static char bgcolor(mode_t mode)
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{
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if (S_ISREG(mode) && (mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
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return ATTR(0xF000); /* File is executable ... */
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return ATTR(mode);
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}
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#endif
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/*----------------------------------------------------------------------*/
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#if defined(CONFIG_FEATURE_LS_FILETYPES) || defined(CONFIG_FEATURE_LS_COLOR)
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static char append_char(mode_t mode)
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{
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if (!(all_fmt & LIST_FILETYPE))
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return '\0';
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if (S_ISDIR(mode))
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return '/';
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if (!(all_fmt & LIST_EXEC))
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return '\0';
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if (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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#define countdirs(A,B) count_dirs((A), (B), 1)
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#define countsubdirs(A,B) count_dirs((A), (B), 0)
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static int count_dirs(struct dnode **dn, int nfiles, int notsubdirs)
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{
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int i, dirs;
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if (dn == NULL || nfiles < 1)
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return (0);
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dirs = 0;
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for (i = 0; i < nfiles; i++) {
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if (S_ISDIR(dn[i]->dstat.st_mode)
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&& (notsubdirs ||
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((dn[i]->name[0] != '.') || (dn[i]->name[1]
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&& ((dn[i]->name[1] != '.')
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|| dn[i]->name[2])))))
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dirs++;
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}
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return (dirs);
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}
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static int countfiles(struct dnode **dnp)
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{
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int nfiles;
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struct dnode *cur;
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if (dnp == NULL)
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return (0);
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nfiles = 0;
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for (cur = dnp[0]; cur->next != NULL; cur = cur->next)
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nfiles++;
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nfiles++;
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return (nfiles);
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}
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/* get memory to hold an array of pointers */
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static struct dnode **dnalloc(int num)
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{
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struct dnode **p;
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if (num < 1)
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return (NULL);
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p = (struct dnode **) xzalloc(num * sizeof(struct dnode *));
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return (p);
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}
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#ifdef CONFIG_FEATURE_LS_RECURSIVE
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static void dfree(struct dnode **dnp, int nfiles)
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{
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int i;
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if (dnp == NULL)
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return;
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for (i = 0; i < nfiles; i++) {
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struct dnode *cur = dnp[i];
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if(cur->allocated)
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free(cur->fullname); /* free the filename */
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free(cur); /* free the dnode */
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}
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free(dnp); /* free the array holding the dnode pointers */
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}
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#else
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#define dfree(...)
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#endif
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static struct dnode **splitdnarray(struct dnode **dn, int nfiles, int which)
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{
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int dncnt, i, d;
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struct dnode **dnp;
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if (dn == NULL || nfiles < 1)
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return (NULL);
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/* count how many dirs and regular files there are */
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if (which == SPLIT_SUBDIR)
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dncnt = countsubdirs(dn, nfiles);
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else {
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dncnt = countdirs(dn, nfiles); /* assume we are looking for dirs */
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if (which == SPLIT_FILE)
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dncnt = nfiles - dncnt; /* looking for files */
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}
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/* allocate a file array and a dir array */
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dnp = dnalloc(dncnt);
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/* copy the entrys into the file or dir array */
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for (d = i = 0; i < nfiles; i++) {
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if (S_ISDIR(dn[i]->dstat.st_mode)) {
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if (which & (SPLIT_DIR|SPLIT_SUBDIR)) {
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if ((which & SPLIT_DIR)
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|| ((dn[i]->name[0] != '.')
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|| (dn[i]->name[1]
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&& ((dn[i]->name[1] != '.')
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|| dn[i]->name[2])))) {
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dnp[d++] = dn[i];
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}
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}
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} else if (!(which & (SPLIT_DIR|SPLIT_SUBDIR))) {
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dnp[d++] = dn[i];
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}
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}
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return (dnp);
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}
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/*----------------------------------------------------------------------*/
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#ifdef CONFIG_FEATURE_LS_SORTFILES
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static int sortcmp(const void *a, const void *b)
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{
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struct dnode *d1 = *(struct dnode **)a;
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struct dnode *d2 = *(struct dnode **)b;
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unsigned int sort_opts = all_fmt & SORT_MASK;
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int dif;
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dif = 0; /* assume SORT_NAME */
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if (sort_opts == SORT_SIZE) {
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dif = (int) (d2->dstat.st_size - d1->dstat.st_size);
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} else if (sort_opts == SORT_ATIME) {
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dif = (int) (d2->dstat.st_atime - d1->dstat.st_atime);
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} else if (sort_opts == SORT_CTIME) {
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dif = (int) (d2->dstat.st_ctime - d1->dstat.st_ctime);
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} else if (sort_opts == SORT_MTIME) {
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dif = (int) (d2->dstat.st_mtime - d1->dstat.st_mtime);
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} else if (sort_opts == SORT_DIR) {
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dif = S_ISDIR(d2->dstat.st_mode) - S_ISDIR(d1->dstat.st_mode);
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/* } else if (sort_opts == SORT_VERSION) { */
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/* } else if (sort_opts == SORT_EXT) { */
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}
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if (dif == 0) {
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/* sort by name- may be a tie_breaker for time or size cmp */
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if (ENABLE_LOCALE_SUPPORT) dif = strcoll(d1->name, d2->name);
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else dif = strcmp(d1->name, d2->name);
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}
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if (all_fmt & SORT_ORDER_REVERSE) {
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dif = -dif;
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}
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return (dif);
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}
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/*----------------------------------------------------------------------*/
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static void dnsort(struct dnode **dn, int size)
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{
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qsort(dn, size, sizeof *dn, sortcmp);
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}
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#else
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#define sortcmp(a, b) 0
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#define dnsort(dn, size)
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#endif
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/*----------------------------------------------------------------------*/
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static void showfiles(struct dnode **dn, int nfiles)
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{
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int i, ncols, nrows, row, nc;
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int column = 0;
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int nexttab = 0;
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int column_width = 0; /* for STYLE_LONG and STYLE_SINGLE not used */
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if (dn == NULL || nfiles < 1)
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return;
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if (all_fmt & STYLE_ONE_RECORD_FLAG) {
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ncols = 1;
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} else {
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/* find the longest file name- use that as the column width */
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for (i = 0; i < nfiles; i++) {
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int len = strlen(dn[i]->name) +
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#ifdef CONFIG_SELINUX
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((all_fmt & LIST_CONTEXT) ? 33 : 0) +
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#endif
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((all_fmt & LIST_INO) ? 8 : 0) +
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((all_fmt & LIST_BLOCKS) ? 5 : 0);
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if (column_width < len)
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column_width = len;
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}
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column_width += tabstops;
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ncols = (int) (terminal_width / column_width);
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}
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if (ncols > 1) {
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nrows = nfiles / ncols;
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if ((nrows * ncols) < nfiles)
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nrows++; /* round up fractionals */
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} else {
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nrows = nfiles;
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ncols = 1;
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}
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for (row = 0; row < nrows; row++) {
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for (nc = 0; nc < ncols; nc++) {
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/* reach into the array based on the column and row */
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i = (nc * nrows) + row; /* assume display by column */
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if (all_fmt & DISP_ROWS)
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i = (row * ncols) + nc; /* display across row */
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if (i < nfiles) {
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if (column > 0) {
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nexttab -= column;
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while (nexttab--) {
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putchar(' ');
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column++;
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}
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}
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nexttab = column + column_width;
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column += list_single(dn[i]);
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}
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}
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putchar('\n');
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column = 0;
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}
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}
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/*----------------------------------------------------------------------*/
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static void showdirs(struct dnode **dn, int ndirs, int first)
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{
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int i, nfiles;
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struct dnode **subdnp;
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int dndirs;
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struct dnode **dnd;
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if (dn == NULL || ndirs < 1)
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return;
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for (i = 0; i < ndirs; i++) {
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if (all_fmt & (DISP_DIRNAME | DISP_RECURSIVE)) {
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if (!first)
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printf("\n");
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first = 0;
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printf("%s:\n", dn[i]->fullname);
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}
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subdnp = list_dir(dn[i]->fullname);
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nfiles = countfiles(subdnp);
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|
if (nfiles > 0) {
|
|
/* list all files at this level */
|
|
if (ENABLE_FEATURE_LS_SORTFILES) dnsort(subdnp, nfiles);
|
|
showfiles(subdnp, nfiles);
|
|
if (ENABLE_FEATURE_LS_RECURSIVE) {
|
|
if (all_fmt & DISP_RECURSIVE) {
|
|
/* recursive- list the sub-dirs */
|
|
dnd = splitdnarray(subdnp, nfiles, SPLIT_SUBDIR);
|
|
dndirs = countsubdirs(subdnp, nfiles);
|
|
if (dndirs > 0) {
|
|
if (ENABLE_FEATURE_LS_SORTFILES) dnsort(dnd, dndirs);
|
|
showdirs(dnd, dndirs, 0);
|
|
/* free the array of dnode pointers to the dirs */
|
|
free(dnd);
|
|
}
|
|
}
|
|
/* free the dnodes and the fullname mem */
|
|
dfree(subdnp, nfiles);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
static struct dnode **list_dir(const char *path)
|
|
{
|
|
struct dnode *dn, *cur, **dnp;
|
|
struct dirent *entry;
|
|
DIR *dir;
|
|
int i, nfiles;
|
|
|
|
if (path == NULL)
|
|
return (NULL);
|
|
|
|
dn = NULL;
|
|
nfiles = 0;
|
|
dir = warn_opendir(path);
|
|
if (dir == NULL) {
|
|
status = EXIT_FAILURE;
|
|
return (NULL); /* could not open the dir */
|
|
}
|
|
while ((entry = readdir(dir)) != NULL) {
|
|
char *fullname;
|
|
|
|
/* are we going to list the file- it may be . or .. or a hidden file */
|
|
if (entry->d_name[0] == '.') {
|
|
if ((entry->d_name[1] == 0 || (
|
|
entry->d_name[1] == '.'
|
|
&& entry->d_name[2] == 0))
|
|
&& !(all_fmt & DISP_DOT))
|
|
continue;
|
|
if (!(all_fmt & DISP_HIDDEN))
|
|
continue;
|
|
}
|
|
fullname = concat_path_file(path, entry->d_name);
|
|
cur = my_stat(fullname, strrchr(fullname, '/') + 1);
|
|
if (!cur)
|
|
continue;
|
|
cur->allocated = 1;
|
|
cur->next = dn;
|
|
dn = cur;
|
|
nfiles++;
|
|
}
|
|
closedir(dir);
|
|
|
|
/* now that we know how many files there are
|
|
** allocate memory for an array to hold dnode pointers
|
|
*/
|
|
if (dn == NULL)
|
|
return (NULL);
|
|
dnp = dnalloc(nfiles);
|
|
for (i = 0, cur = dn; i < nfiles; i++) {
|
|
dnp[i] = cur; /* save pointer to node in array */
|
|
cur = cur->next;
|
|
}
|
|
|
|
return (dnp);
|
|
}
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
static int list_single(struct dnode *dn)
|
|
{
|
|
int i, column = 0;
|
|
|
|
#ifdef CONFIG_FEATURE_LS_USERNAME
|
|
char scratch[16];
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
|
|
char *filetime;
|
|
time_t ttime, age;
|
|
#endif
|
|
#if defined(CONFIG_FEATURE_LS_FILETYPES) || defined (CONFIG_FEATURE_LS_COLOR)
|
|
struct stat info;
|
|
char append;
|
|
#endif
|
|
|
|
if (dn->fullname == NULL)
|
|
return (0);
|
|
|
|
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
|
|
ttime = dn->dstat.st_mtime; /* the default time */
|
|
if (all_fmt & TIME_ACCESS)
|
|
ttime = dn->dstat.st_atime;
|
|
if (all_fmt & TIME_CHANGE)
|
|
ttime = dn->dstat.st_ctime;
|
|
filetime = ctime(&ttime);
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_FILETYPES
|
|
append = append_char(dn->dstat.st_mode);
|
|
#endif
|
|
|
|
for (i = 0; i <= 31; i++) {
|
|
switch (all_fmt & (1 << i)) {
|
|
case LIST_INO:
|
|
column += printf("%7ld ", (long int) dn->dstat.st_ino);
|
|
break;
|
|
case LIST_BLOCKS:
|
|
#if _FILE_OFFSET_BITS == 64
|
|
column += printf("%4lld ", (long long)dn->dstat.st_blocks >> 1);
|
|
#else
|
|
column += printf("%4ld ", dn->dstat.st_blocks >> 1);
|
|
#endif
|
|
break;
|
|
case LIST_MODEBITS:
|
|
column += printf("%-10s ", (char *) bb_mode_string(dn->dstat.st_mode));
|
|
break;
|
|
case LIST_NLINKS:
|
|
column += printf("%4ld ", (long) dn->dstat.st_nlink);
|
|
break;
|
|
case LIST_ID_NAME:
|
|
#ifdef CONFIG_FEATURE_LS_USERNAME
|
|
bb_getpwuid(scratch, dn->dstat.st_uid, sizeof(scratch));
|
|
printf("%-8.8s ", scratch);
|
|
bb_getgrgid(scratch, dn->dstat.st_gid, sizeof(scratch));
|
|
printf("%-8.8s", scratch);
|
|
column += 17;
|
|
break;
|
|
#endif
|
|
case LIST_ID_NUMERIC:
|
|
column += printf("%-8d %-8d", dn->dstat.st_uid, dn->dstat.st_gid);
|
|
break;
|
|
case LIST_SIZE:
|
|
case LIST_DEV:
|
|
if (S_ISBLK(dn->dstat.st_mode) || S_ISCHR(dn->dstat.st_mode)) {
|
|
column += printf("%4d, %3d ", (int) major(dn->dstat.st_rdev),
|
|
(int) minor(dn->dstat.st_rdev));
|
|
} else {
|
|
#ifdef CONFIG_FEATURE_HUMAN_READABLE
|
|
if (all_fmt & LS_DISP_HR) {
|
|
column += printf("%9s ",
|
|
make_human_readable_str(dn->dstat.st_size, 1, 0));
|
|
} else
|
|
#endif
|
|
{
|
|
#if _FILE_OFFSET_BITS == 64
|
|
column += printf("%9lld ", (long long) dn->dstat.st_size);
|
|
#else
|
|
column += printf("%9ld ", dn->dstat.st_size);
|
|
#endif
|
|
}
|
|
}
|
|
break;
|
|
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
|
|
case LIST_FULLTIME:
|
|
printf("%24.24s ", filetime);
|
|
column += 25;
|
|
break;
|
|
case LIST_DATE_TIME:
|
|
if ((all_fmt & LIST_FULLTIME) == 0) {
|
|
age = time(NULL) - ttime;
|
|
printf("%6.6s ", filetime + 4);
|
|
if (age < 3600L * 24 * 365 / 2 && age > -15 * 60) {
|
|
/* hh:mm if less than 6 months old */
|
|
printf("%5.5s ", filetime + 11);
|
|
} else {
|
|
printf(" %4.4s ", filetime + 20);
|
|
}
|
|
column += 13;
|
|
}
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_SELINUX
|
|
case LIST_CONTEXT:
|
|
{
|
|
char context[80];
|
|
int len = 0;
|
|
|
|
if (dn->sid) {
|
|
/* I assume sid initilized with NULL */
|
|
len = strlen(dn->sid)+1;
|
|
safe_strncpy(context, dn->sid, len);
|
|
freecon(dn->sid);
|
|
}else {
|
|
safe_strncpy(context, "unknown", 8);
|
|
}
|
|
printf("%-32s ", context);
|
|
column += MAX(33, len);
|
|
}
|
|
break;
|
|
#endif
|
|
case LIST_FILENAME:
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
errno = 0;
|
|
if (show_color && !lstat(dn->fullname, &info)) {
|
|
printf("\033[%d;%dm", bgcolor(info.st_mode),
|
|
fgcolor(info.st_mode));
|
|
}
|
|
#endif
|
|
column += printf("%s", dn->name);
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
if (show_color) {
|
|
printf("\033[0m");
|
|
}
|
|
#endif
|
|
break;
|
|
case LIST_SYMLINK:
|
|
if (S_ISLNK(dn->dstat.st_mode)) {
|
|
char *lpath = xreadlink(dn->fullname);
|
|
|
|
if (lpath) {
|
|
printf(" -> ");
|
|
#if defined(CONFIG_FEATURE_LS_FILETYPES) || defined (CONFIG_FEATURE_LS_COLOR)
|
|
if (!stat(dn->fullname, &info)) {
|
|
append = append_char(info.st_mode);
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
if (show_color) {
|
|
errno = 0;
|
|
printf("\033[%d;%dm", bgcolor(info.st_mode),
|
|
fgcolor(info.st_mode));
|
|
}
|
|
#endif
|
|
column += printf("%s", lpath) + 4;
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
if (show_color) {
|
|
printf("\033[0m");
|
|
}
|
|
#endif
|
|
free(lpath);
|
|
}
|
|
}
|
|
break;
|
|
#ifdef CONFIG_FEATURE_LS_FILETYPES
|
|
case LIST_FILETYPE:
|
|
if (append != '\0') {
|
|
printf("%1c", append);
|
|
column++;
|
|
}
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return column;
|
|
}
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
|
|
/* "[-]Cadil1", POSIX mandated options, busybox always supports */
|
|
/* "[-]gnsx", POSIX non-mandated options, busybox always supports */
|
|
/* "[-]Ak" GNU options, busybox always supports */
|
|
/* "[-]FLRctur", POSIX mandated options, busybox optionally supports */
|
|
/* "[-]p", POSIX non-mandated options, busybox optionally supports */
|
|
/* "[-]SXvThw", GNU options, busybox optionally supports */
|
|
/* "[-]K", SELinux mandated options, busybox optionally supports */
|
|
/* "[-]e", I think we made this one up */
|
|
|
|
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
|
|
# define LS_STR_TIMESTAMPS "cetu"
|
|
#else
|
|
# define LS_STR_TIMESTAMPS ""
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_LS_FILETYPES
|
|
# define LS_STR_FILETYPES "Fp"
|
|
#else
|
|
# define LS_STR_FILETYPES ""
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
|
|
# define LS_STR_FOLLOW_LINKS "L"
|
|
#else
|
|
# define LS_STR_FOLLOW_LINKS ""
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_LS_RECURSIVE
|
|
# define LS_STR_RECURSIVE "R"
|
|
#else
|
|
# define LS_STR_RECURSIVE ""
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_HUMAN_READABLE
|
|
# define LS_STR_HUMAN_READABLE "h"
|
|
#else
|
|
# define LS_STR_HUMAN_READABLE ""
|
|
#endif
|
|
|
|
#ifdef CONFIG_SELINUX
|
|
# define LS_STR_SELINUX "K"
|
|
#else
|
|
# define LS_STR_SELINUX ""
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_AUTOWIDTH
|
|
# define LS_STR_AUTOWIDTH "T:w:"
|
|
#else
|
|
# define LS_STR_AUTOWIDTH ""
|
|
#endif
|
|
|
|
static const char ls_options[]="Cadil1gnsxAk" \
|
|
LS_STR_TIMESTAMPS \
|
|
USE_FEATURE_LS_SORTFILES("SXrv") \
|
|
LS_STR_FILETYPES \
|
|
LS_STR_FOLLOW_LINKS \
|
|
LS_STR_RECURSIVE \
|
|
LS_STR_HUMAN_READABLE \
|
|
LS_STR_SELINUX \
|
|
LS_STR_AUTOWIDTH;
|
|
|
|
#define LIST_MASK_TRIGGER 0
|
|
#define STYLE_MASK_TRIGGER STYLE_MASK
|
|
#define SORT_MASK_TRIGGER SORT_MASK
|
|
#define DISP_MASK_TRIGGER DISP_ROWS
|
|
|
|
static const unsigned opt_flags[] = {
|
|
LIST_SHORT | STYLE_COLUMNS, /* C */
|
|
DISP_HIDDEN | DISP_DOT, /* a */
|
|
DISP_NOLIST, /* d */
|
|
LIST_INO, /* i */
|
|
LIST_LONG | STYLE_LONG, /* l - remember LS_DISP_HR in mask! */
|
|
LIST_SHORT | STYLE_SINGLE, /* 1 */
|
|
0, /* g - ingored */
|
|
LIST_ID_NUMERIC, /* n */
|
|
LIST_BLOCKS, /* s */
|
|
DISP_ROWS, /* x */
|
|
DISP_HIDDEN, /* A */
|
|
#ifdef CONFIG_SELINUX
|
|
LIST_CONTEXT, /* k */
|
|
#else
|
|
0, /* k - ingored */
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_TIMESTAMPS
|
|
TIME_CHANGE | (ENABLE_FEATURE_LS_SORTFILES * SORT_CTIME), /* c */
|
|
LIST_FULLTIME, /* e */
|
|
ENABLE_FEATURE_LS_SORTFILES * SORT_MTIME, /* t */
|
|
TIME_ACCESS | (ENABLE_FEATURE_LS_SORTFILES * SORT_ATIME), /* u */
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_SORTFILES
|
|
SORT_SIZE, /* S */
|
|
SORT_EXT, /* X */
|
|
SORT_ORDER_REVERSE, /* r */
|
|
SORT_VERSION, /* v */
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_FILETYPES
|
|
LIST_FILETYPE | LIST_EXEC, /* F */
|
|
LIST_FILETYPE, /* p */
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_FOLLOWLINKS
|
|
FOLLOW_LINKS, /* L */
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_RECURSIVE
|
|
DISP_RECURSIVE, /* R */
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_HUMAN_READABLE
|
|
LS_DISP_HR, /* h */
|
|
#endif
|
|
#ifdef CONFIG_SELINUX
|
|
LIST_MODEBITS|LIST_NLINKS|LIST_CONTEXT|LIST_SIZE|LIST_DATE_TIME, /* K */
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_AUTOWIDTH
|
|
0, 0, /* T, w - ignored */
|
|
#endif
|
|
(1U<<31)
|
|
};
|
|
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
|
|
int ls_main(int argc, char **argv)
|
|
{
|
|
struct dnode **dnd;
|
|
struct dnode **dnf;
|
|
struct dnode **dnp;
|
|
struct dnode *dn;
|
|
struct dnode *cur;
|
|
unsigned opt;
|
|
int nfiles = 0;
|
|
int dnfiles;
|
|
int dndirs;
|
|
int oi;
|
|
int ac;
|
|
int i;
|
|
char **av;
|
|
#ifdef CONFIG_FEATURE_AUTOWIDTH
|
|
char *tabstops_str = NULL;
|
|
char *terminal_width_str = NULL;
|
|
#endif
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
char *color_opt;
|
|
#endif
|
|
|
|
all_fmt = LIST_SHORT |
|
|
(ENABLE_FEATURE_LS_SORTFILES * (SORT_NAME | SORT_ORDER_FORWARD));
|
|
|
|
#ifdef CONFIG_FEATURE_AUTOWIDTH
|
|
/* Obtain the terminal width. */
|
|
get_terminal_width_height(STDOUT_FILENO, &terminal_width, NULL);
|
|
/* Go one less... */
|
|
terminal_width--;
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
applet_long_options = ls_color_opt;
|
|
#endif
|
|
|
|
/* process options */
|
|
#ifdef CONFIG_FEATURE_AUTOWIDTH
|
|
opt = getopt32(argc, argv, ls_options, &tabstops_str, &terminal_width_str
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
, &color_opt
|
|
#endif
|
|
);
|
|
if (tabstops_str) {
|
|
tabstops = xatou(tabstops_str);
|
|
}
|
|
if (terminal_width_str) {
|
|
terminal_width = xatou(terminal_width_str);
|
|
}
|
|
#else
|
|
opt = getopt32(argc, argv, ls_options
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
, &color_opt
|
|
#endif
|
|
);
|
|
#endif
|
|
for (i = 0; opt_flags[i] != (1U<<31); i++) {
|
|
if (opt & (1 << i)) {
|
|
unsigned int flags = opt_flags[i];
|
|
|
|
if (flags & LIST_MASK_TRIGGER) {
|
|
all_fmt &= ~LIST_MASK;
|
|
}
|
|
if (flags & STYLE_MASK_TRIGGER) {
|
|
all_fmt &= ~STYLE_MASK;
|
|
}
|
|
if (ENABLE_FEATURE_LS_SORTFILES && (flags & SORT_MASK_TRIGGER)) {
|
|
all_fmt &= ~SORT_MASK;
|
|
}
|
|
if (flags & DISP_MASK_TRIGGER) {
|
|
all_fmt &= ~DISP_MASK;
|
|
}
|
|
if (flags & TIME_MASK) {
|
|
all_fmt &= ~TIME_MASK;
|
|
}
|
|
if (flags & LIST_CONTEXT) {
|
|
all_fmt |= STYLE_SINGLE;
|
|
}
|
|
#ifdef CONFIG_FEATURE_HUMAN_READABLE
|
|
if (opt == 'l') {
|
|
all_fmt &= ~LS_DISP_HR;
|
|
}
|
|
#endif
|
|
all_fmt |= flags;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_LS_COLOR
|
|
{
|
|
/* find color bit value - last position for short getopt */
|
|
|
|
#if CONFIG_FEATURE_LS_COLOR_IS_DEFAULT
|
|
char *p;
|
|
|
|
if ((p = getenv ("LS_COLORS")) != NULL &&
|
|
(*p == '\0' || (strcmp(p, "none") == 0))) {
|
|
;
|
|
} else if (isatty(STDOUT_FILENO)) {
|
|
show_color = 1;
|
|
}
|
|
#endif
|
|
|
|
if((opt & (1 << i))) { /* next flag after short options */
|
|
if (color_opt == NULL || strcmp("always", color_opt) == 0)
|
|
show_color = 1;
|
|
else if (color_opt != NULL && strcmp("never", color_opt) == 0)
|
|
show_color = 0;
|
|
else if (color_opt != NULL && strcmp("auto", color_opt) == 0 && isatty(STDOUT_FILENO))
|
|
show_color = 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* sort out which command line options take precedence */
|
|
#ifdef CONFIG_FEATURE_LS_RECURSIVE
|
|
if (all_fmt & DISP_NOLIST)
|
|
all_fmt &= ~DISP_RECURSIVE; /* no recurse if listing only dir */
|
|
#endif
|
|
if (ENABLE_FEATURE_LS_TIMESTAMPS && ENABLE_FEATURE_LS_SORTFILES) {
|
|
if (all_fmt & TIME_CHANGE)
|
|
all_fmt = (all_fmt & ~SORT_MASK) | SORT_CTIME;
|
|
if (all_fmt & TIME_ACCESS)
|
|
all_fmt = (all_fmt & ~SORT_MASK) | SORT_ATIME;
|
|
}
|
|
if ((all_fmt & STYLE_MASK) != STYLE_LONG) /* only for long list */
|
|
all_fmt &= ~(LIST_ID_NUMERIC|LIST_FULLTIME|LIST_ID_NAME|LIST_ID_NUMERIC);
|
|
#ifdef CONFIG_FEATURE_LS_USERNAME
|
|
if ((all_fmt & STYLE_MASK) == STYLE_LONG && (all_fmt & LIST_ID_NUMERIC))
|
|
all_fmt &= ~LIST_ID_NAME; /* don't list names if numeric uid */
|
|
#endif
|
|
|
|
/* choose a display format */
|
|
if (!(all_fmt & STYLE_MASK))
|
|
all_fmt |= (isatty(STDOUT_FILENO) ? STYLE_COLUMNS : STYLE_SINGLE);
|
|
|
|
/*
|
|
* when there are no cmd line args we have to supply a default "." arg.
|
|
* we will create a second argv array, "av" that will hold either
|
|
* our created "." arg, or the real cmd line args. The av array
|
|
* just holds the pointers- we don't move the date the pointers
|
|
* point to.
|
|
*/
|
|
ac = argc - optind; /* how many cmd line args are left */
|
|
if (ac < 1) {
|
|
static const char * const dotdir[] = { "." };
|
|
|
|
av = (char **) dotdir;
|
|
ac = 1;
|
|
} else {
|
|
av = argv + optind;
|
|
}
|
|
|
|
/* now, everything is in the av array */
|
|
if (ac > 1)
|
|
all_fmt |= DISP_DIRNAME; /* 2 or more items? label directories */
|
|
|
|
/* stuff the command line file names into an dnode array */
|
|
dn = NULL;
|
|
for (oi = 0; oi < ac; oi++) {
|
|
cur = my_stat(av[oi], av[oi]);
|
|
if (!cur)
|
|
continue;
|
|
cur->allocated = 0;
|
|
cur->next = dn;
|
|
dn = cur;
|
|
nfiles++;
|
|
}
|
|
|
|
/* now that we know how many files there are
|
|
** allocate memory for an array to hold dnode pointers
|
|
*/
|
|
dnp = dnalloc(nfiles);
|
|
for (i = 0, cur = dn; i < nfiles; i++) {
|
|
dnp[i] = cur; /* save pointer to node in array */
|
|
cur = cur->next;
|
|
}
|
|
|
|
if (all_fmt & DISP_NOLIST) {
|
|
if (ENABLE_FEATURE_LS_SORTFILES) dnsort(dnp, nfiles);
|
|
if (nfiles > 0)
|
|
showfiles(dnp, nfiles);
|
|
} else {
|
|
dnd = splitdnarray(dnp, nfiles, SPLIT_DIR);
|
|
dnf = splitdnarray(dnp, nfiles, SPLIT_FILE);
|
|
dndirs = countdirs(dnp, nfiles);
|
|
dnfiles = nfiles - dndirs;
|
|
if (dnfiles > 0) {
|
|
if (ENABLE_FEATURE_LS_SORTFILES) dnsort(dnf, dnfiles);
|
|
showfiles(dnf, dnfiles);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(dnf);
|
|
}
|
|
if (dndirs > 0) {
|
|
if (ENABLE_FEATURE_LS_SORTFILES) dnsort(dnd, dndirs);
|
|
showdirs(dnd, dndirs, dnfiles == 0);
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
free(dnd);
|
|
}
|
|
}
|
|
if (ENABLE_FEATURE_CLEAN_UP)
|
|
dfree(dnp, nfiles);
|
|
return (status);
|
|
}
|