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freebsd-skq/bin/ls/ls.c
Robert Watson 317f1d53c8 When mac_from_text() fails with -Z, print "-" rather than "" so that 
scripts parsing ls(1) output can still count columns.

Obtained from:	TrustedBSD Project
Sponsored by:	DARPA, Network Associates Laboratories
2003-04-26 02:31:26 +00:00

851 lines
21 KiB
C
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/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Michael Fischbein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993, 1994\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#if 0
#ifndef lint
static char sccsid[] = "@(#)ls.c 8.5 (Berkeley) 4/2/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mac.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fts.h>
#include <grp.h>
#include <limits.h>
#include <locale.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#ifdef COLORLS
#include <termcap.h>
#include <signal.h>
#endif
#include "ls.h"
#include "extern.h"
/*
* Upward approximation of the maximum number of characters needed to
* represent a value of integral type t as a string, excluding the
* NUL terminator, with provision for a sign.
*/
#define STRBUF_SIZEOF(t) (1 + CHAR_BIT * sizeof(t) / 3 + 1)
static void display(FTSENT *, FTSENT *, int);
static u_quad_t makenines(u_long);
static int mastercmp(const FTSENT * const *, const FTSENT * const *);
static void traverse(int, char **, int);
static void (*printfcn)(DISPLAY *);
static int (*sortfcn)(const FTSENT *, const FTSENT *);
long blocksize; /* block size units */
int termwidth = 80; /* default terminal width */
/* flags */
int f_accesstime; /* use time of last access */
int f_flags; /* show flags associated with a file */
int f_humanval; /* show human-readable file sizes */
int f_inode; /* print inode */
static int f_kblocks; /* print size in kilobytes */
static int f_listdir; /* list actual directory, not contents */
static int f_listdot; /* list files beginning with . */
int f_longform; /* long listing format */
int f_nonprint; /* show unprintables as ? */
static int f_nosort; /* don't sort output */
int f_notabs; /* don't use tab-separated multi-col output */
static int f_numericonly; /* don't convert uid/gid to name */
int f_octal; /* show unprintables as \xxx */
int f_octal_escape; /* like f_octal but use C escapes if possible */
static int f_recursive; /* ls subdirectories also */
static int f_reversesort; /* reverse whatever sort is used */
int f_sectime; /* print the real time for all files */
static int f_singlecol; /* use single column output */
int f_size; /* list size in short listing */
int f_slash; /* similar to f_type, but only for dirs */
int f_sortacross; /* sort across rows, not down columns */
int f_statustime; /* use time of last mode change */
int f_stream; /* stream the output, separate with commas */
static int f_timesort; /* sort by time vice name */
int f_type; /* add type character for non-regular files */
static int f_whiteout; /* show whiteout entries */
int f_label; /* show MAC label */
#ifdef COLORLS
int f_color; /* add type in color for non-regular files */
char *ansi_bgcol; /* ANSI sequence to set background colour */
char *ansi_fgcol; /* ANSI sequence to set foreground colour */
char *ansi_coloff; /* ANSI sequence to reset colours */
char *attrs_off; /* ANSI sequence to turn off attributes */
char *enter_bold; /* ANSI sequence to set color to bold mode */
#endif
static int rval;
int
main(int argc, char *argv[])
{
static char dot[] = ".", *dotav[] = {dot, NULL};
struct winsize win;
int ch, fts_options, notused;
char *p;
#ifdef COLORLS
char termcapbuf[1024]; /* termcap definition buffer */
char tcapbuf[512]; /* capability buffer */
char *bp = tcapbuf;
#endif
(void)setlocale(LC_ALL, "");
/* Terminal defaults to -Cq, non-terminal defaults to -1. */
if (isatty(STDOUT_FILENO)) {
termwidth = 80;
if ((p = getenv("COLUMNS")) != NULL && *p != '\0')
termwidth = atoi(p);
else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) != -1 &&
win.ws_col > 0)
termwidth = win.ws_col;
f_nonprint = 1;
} else {
f_singlecol = 1;
/* retrieve environment variable, in case of explicit -C */
p = getenv("COLUMNS");
if (p)
termwidth = atoi(p);
}
/* Root is -A automatically. */
if (!getuid())
f_listdot = 1;
fts_options = FTS_PHYSICAL;
while ((ch = getopt(argc, argv, "1ABCFGHLPRTWZabcdfghiklmnopqrstuwx"))
!= -1) {
switch (ch) {
/*
* The -1, -C, -x and -l options all override each other so
* shell aliasing works right.
*/
case '1':
f_singlecol = 1;
f_longform = 0;
f_stream = 0;
break;
case 'B':
f_nonprint = 0;
f_octal = 1;
f_octal_escape = 0;
break;
case 'C':
f_sortacross = f_longform = f_singlecol = 0;
break;
case 'l':
f_longform = 1;
f_singlecol = 0;
f_stream = 0;
break;
case 'x':
f_sortacross = 1;
f_longform = 0;
f_singlecol = 0;
break;
/* The -c and -u options override each other. */
case 'c':
f_statustime = 1;
f_accesstime = 0;
break;
case 'u':
f_accesstime = 1;
f_statustime = 0;
break;
case 'F':
f_type = 1;
f_slash = 0;
break;
case 'H':
fts_options |= FTS_COMFOLLOW;
break;
case 'G':
setenv("CLICOLOR", "", 1);
break;
case 'L':
fts_options &= ~FTS_PHYSICAL;
fts_options |= FTS_LOGICAL;
break;
case 'P':
fts_options &= ~FTS_COMFOLLOW;
fts_options &= ~FTS_LOGICAL;
fts_options |= FTS_PHYSICAL;
break;
case 'R':
f_recursive = 1;
break;
case 'a':
fts_options |= FTS_SEEDOT;
/* FALLTHROUGH */
case 'A':
f_listdot = 1;
break;
/* The -d option turns off the -R option. */
case 'd':
f_listdir = 1;
f_recursive = 0;
break;
case 'f':
f_nosort = 1;
break;
case 'g': /* Compatibility with 4.3BSD. */
break;
case 'h':
f_humanval = 1;
break;
case 'i':
f_inode = 1;
break;
case 'k':
f_kblocks = 1;
break;
case 'm':
f_stream = 1;
f_singlecol = 0;
f_longform = 0;
break;
case 'n':
f_numericonly = 1;
break;
case 'o':
f_flags = 1;
break;
case 'p':
f_slash = 1;
f_type = 1;
break;
case 'q':
f_nonprint = 1;
f_octal = 0;
f_octal_escape = 0;
break;
case 'r':
f_reversesort = 1;
break;
case 's':
f_size = 1;
break;
case 'T':
f_sectime = 1;
break;
case 't':
f_timesort = 1;
break;
case 'W':
f_whiteout = 1;
break;
case 'b':
f_nonprint = 0;
f_octal = 0;
f_octal_escape = 1;
break;
case 'w':
f_nonprint = 0;
f_octal = 0;
f_octal_escape = 0;
break;
case 'Z':
f_label = 1;
break;
default:
case '?':
usage();
}
}
argc -= optind;
argv += optind;
/* Enabling of colours is conditional on the environment. */
if (getenv("CLICOLOR") &&
(isatty(STDOUT_FILENO) || getenv("CLICOLOR_FORCE")))
#ifdef COLORLS
if (tgetent(termcapbuf, getenv("TERM")) == 1) {
ansi_fgcol = tgetstr("AF", &bp);
ansi_bgcol = tgetstr("AB", &bp);
attrs_off = tgetstr("me", &bp);
enter_bold = tgetstr("md", &bp);
/* To switch colours off use 'op' if
* available, otherwise use 'oc', or
* don't do colours at all. */
ansi_coloff = tgetstr("op", &bp);
if (!ansi_coloff)
ansi_coloff = tgetstr("oc", &bp);
if (ansi_fgcol && ansi_bgcol && ansi_coloff)
f_color = 1;
}
#else
warnx("color support not compiled in");
#endif /*COLORLS*/
#ifdef COLORLS
if (f_color) {
/*
* We can't put tabs and color sequences together:
* column number will be incremented incorrectly
* for "stty oxtabs" mode.
*/
f_notabs = 1;
(void)signal(SIGINT, colorquit);
(void)signal(SIGQUIT, colorquit);
parsecolors(getenv("LSCOLORS"));
}
#endif
/*
* If not -F, -i, -l, -s or -t options, don't require stat
* information, unless in color mode in which case we do
* need this to determine which colors to display.
*/
if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type
#ifdef COLORLS
&& !f_color
#endif
)
fts_options |= FTS_NOSTAT;
/*
* If not -F, -d or -l options, follow any symbolic links listed on
* the command line.
*/
if (!f_longform && !f_listdir && !f_type)
fts_options |= FTS_COMFOLLOW;
/*
* If -W, show whiteout entries
*/
#ifdef FTS_WHITEOUT
if (f_whiteout)
fts_options |= FTS_WHITEOUT;
#endif
/* If -l or -s, figure out block size. */
if (f_longform || f_size) {
if (f_kblocks)
blocksize = 2;
else {
(void)getbsize(&notused, &blocksize);
blocksize /= 512;
}
}
/* Select a sort function. */
if (f_reversesort) {
if (!f_timesort)
sortfcn = revnamecmp;
else if (f_accesstime)
sortfcn = revacccmp;
else if (f_statustime)
sortfcn = revstatcmp;
else /* Use modification time. */
sortfcn = revmodcmp;
} else {
if (!f_timesort)
sortfcn = namecmp;
else if (f_accesstime)
sortfcn = acccmp;
else if (f_statustime)
sortfcn = statcmp;
else /* Use modification time. */
sortfcn = modcmp;
}
/* Select a print function. */
if (f_singlecol)
printfcn = printscol;
else if (f_longform)
printfcn = printlong;
else if (f_stream)
printfcn = printstream;
else
printfcn = printcol;
if (argc)
traverse(argc, argv, fts_options);
else
traverse(1, dotav, fts_options);
exit(rval);
}
static int output; /* If anything output. */
/*
* Traverse() walks the logical directory structure specified by the argv list
* in the order specified by the mastercmp() comparison function. During the
* traversal it passes linked lists of structures to display() which represent
* a superset (may be exact set) of the files to be displayed.
*/
static void
traverse(int argc, char *argv[], int options)
{
FTS *ftsp;
FTSENT *p, *chp;
int ch_options;
if ((ftsp =
fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
err(1, "fts_open");
display(NULL, fts_children(ftsp, 0), options);
if (f_listdir)
return;
/*
* If not recursing down this tree and don't need stat info, just get
* the names.
*/
ch_options = !f_recursive && !f_label &&
options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
while ((p = fts_read(ftsp)) != NULL)
switch (p->fts_info) {
case FTS_DC:
warnx("%s: directory causes a cycle", p->fts_name);
break;
case FTS_DNR:
case FTS_ERR:
warnx("%s: %s", p->fts_name, strerror(p->fts_errno));
rval = 1;
break;
case FTS_D:
if (p->fts_level != FTS_ROOTLEVEL &&
p->fts_name[0] == '.' && !f_listdot)
break;
/*
* If already output something, put out a newline as
* a separator. If multiple arguments, precede each
* directory with its name.
*/
if (output) {
putchar('\n');
printname(p->fts_path);
puts(":");
} else if (argc > 1) {
printname(p->fts_path);
puts(":");
output = 1;
}
chp = fts_children(ftsp, ch_options);
display(p, chp, options);
if (!f_recursive && chp != NULL)
(void)fts_set(ftsp, p, FTS_SKIP);
break;
default:
break;
}
if (errno)
err(1, "fts_read");
}
/*
* Display() takes a linked list of FTSENT structures and passes the list
* along with any other necessary information to the print function. P
* points to the parent directory of the display list.
*/
static void
display(FTSENT *p, FTSENT *list, int options)
{
struct stat *sp;
DISPLAY d;
FTSENT *cur;
NAMES *np;
off_t maxsize;
u_long btotal, labelstrlen, maxblock, maxinode, maxlen, maxnlink;
u_long maxlabelstr;
int bcfile, maxflags;
gid_t maxgroup;
uid_t maxuser;
size_t flen, ulen, glen;
char *initmax;
int entries, needstats;
const char *user, *group;
char *flags, *labelstr = NULL;
char buf[STRBUF_SIZEOF(u_quad_t) + 1];
char ngroup[STRBUF_SIZEOF(uid_t) + 1];
char nuser[STRBUF_SIZEOF(gid_t) + 1];
/*
* If list is NULL there are two possibilities: that the parent
* directory p has no children, or that fts_children() returned an
* error. We ignore the error case since it will be replicated
* on the next call to fts_read() on the post-order visit to the
* directory p, and will be signaled in traverse().
*/
if (list == NULL)
return;
needstats = f_inode || f_longform || f_size;
flen = 0;
btotal = 0;
initmax = getenv("LS_COLWIDTHS");
/* Fields match -lios order. New ones should be added at the end. */
maxlabelstr = maxblock = maxinode = maxlen = maxnlink =
maxuser = maxgroup = maxflags = maxsize = 0;
if (initmax != NULL && *initmax != '\0') {
char *initmax2, *jinitmax;
int ninitmax;
/* Fill-in "::" as "0:0:0" for the sake of scanf. */
jinitmax = initmax2 = malloc(strlen(initmax) * 2 + 2);
if (jinitmax == NULL)
err(1, "malloc");
if (*initmax == ':')
strcpy(initmax2, "0:"), initmax2 += 2;
else
*initmax2++ = *initmax, *initmax2 = '\0';
for (initmax++; *initmax != '\0'; initmax++) {
if (initmax[-1] == ':' && initmax[0] == ':') {
*initmax2++ = '0';
*initmax2++ = initmax[0];
initmax2[1] = '\0';
} else {
*initmax2++ = initmax[0];
initmax2[1] = '\0';
}
}
if (initmax2[-1] == ':')
strcpy(initmax2, "0");
ninitmax = sscanf(jinitmax,
" %lu : %lu : %lu : %i : %i : %i : %llu : %lu : %lu ",
&maxinode, &maxblock, &maxnlink, &maxuser,
&maxgroup, &maxflags, &maxsize, &maxlen, &maxlabelstr);
f_notabs = 1;
switch (ninitmax) {
case 0:
maxinode = 0;
/* FALLTHROUGH */
case 1:
maxblock = 0;
/* FALLTHROUGH */
case 2:
maxnlink = 0;
/* FALLTHROUGH */
case 3:
maxuser = 0;
/* FALLTHROUGH */
case 4:
maxgroup = 0;
/* FALLTHROUGH */
case 5:
maxflags = 0;
/* FALLTHROUGH */
case 6:
maxsize = 0;
/* FALLTHROUGH */
case 7:
maxlen = 0;
/* FALLTHROUGH */
case 8:
maxlabelstr = 0;
/* FALLTHROUGH */
#ifdef COLORLS
if (!f_color)
#endif
f_notabs = 0;
/* FALLTHROUGH */
default:
break;
}
maxinode = makenines(maxinode);
maxblock = makenines(maxblock);
maxnlink = makenines(maxnlink);
maxsize = makenines(maxsize);
}
bcfile = 0;
flags = NULL;
for (cur = list, entries = 0; cur; cur = cur->fts_link) {
if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
warnx("%s: %s",
cur->fts_name, strerror(cur->fts_errno));
cur->fts_number = NO_PRINT;
rval = 1;
continue;
}
/*
* P is NULL if list is the argv list, to which different rules
* apply.
*/
if (p == NULL) {
/* Directories will be displayed later. */
if (cur->fts_info == FTS_D && !f_listdir) {
cur->fts_number = NO_PRINT;
continue;
}
} else {
/* Only display dot file if -a/-A set. */
if (cur->fts_name[0] == '.' && !f_listdot) {
cur->fts_number = NO_PRINT;
continue;
}
}
if (cur->fts_namelen > maxlen)
maxlen = cur->fts_namelen;
if (f_octal || f_octal_escape) {
u_long t = len_octal(cur->fts_name, cur->fts_namelen);
if (t > maxlen)
maxlen = t;
}
if (needstats) {
sp = cur->fts_statp;
if (sp->st_blocks > maxblock)
maxblock = sp->st_blocks;
if (sp->st_ino > maxinode)
maxinode = sp->st_ino;
if (sp->st_nlink > maxnlink)
maxnlink = sp->st_nlink;
if (sp->st_size > maxsize)
maxsize = sp->st_size;
btotal += sp->st_blocks;
if (f_longform) {
if (f_numericonly) {
(void)snprintf(nuser, sizeof(nuser),
"%u", sp->st_uid);
(void)snprintf(ngroup, sizeof(ngroup),
"%u", sp->st_gid);
user = nuser;
group = ngroup;
} else {
user = user_from_uid(sp->st_uid, 0);
group = group_from_gid(sp->st_gid, 0);
}
if ((ulen = strlen(user)) > maxuser)
maxuser = ulen;
if ((glen = strlen(group)) > maxgroup)
maxgroup = glen;
if (f_flags) {
flags = fflagstostr(sp->st_flags);
if (flags != NULL && *flags == '\0') {
free(flags);
flags = strdup("-");
}
if (flags == NULL)
err(1, "fflagstostr");
flen = strlen(flags);
if (flen > (size_t)maxflags)
maxflags = flen;
} else
flen = 0;
labelstr = NULL;
if (f_label) {
char name[PATH_MAX + 1];
mac_t label;
int error;
error = mac_prepare_file_label(&label);
if (error == -1) {
warn("MAC label for %s/%s",
cur->fts_parent->fts_path,
cur->fts_name);
goto label_out;
}
if (cur->fts_level == FTS_ROOTLEVEL)
snprintf(name, sizeof(name),
"%s", cur->fts_name);
else
snprintf(name, sizeof(name),
"%s/%s", cur->fts_parent->
fts_accpath, cur->fts_name);
if (options & FTS_LOGICAL)
error = mac_get_file(name,
label);
else
error = mac_get_link(name,
label);
if (error == -1) {
warn("MAC label for %s/%s",
cur->fts_parent->fts_path,
cur->fts_name);
mac_free(label);
goto label_out;
}
error = mac_to_text(label,
&labelstr);
if (error == -1) {
warn("MAC label for %s/%s",
cur->fts_parent->fts_path,
cur->fts_name);
mac_free(label);
goto label_out;
}
mac_free(label);
label_out:
if (labelstr == NULL)
labelstr = strdup("-");
labelstrlen = strlen(labelstr);
if (labelstrlen > maxlabelstr)
maxlabelstr = labelstrlen;
} else
labelstrlen = 0;
if ((np = malloc(sizeof(NAMES) + labelstrlen +
ulen + glen + flen + 4)) == NULL)
err(1, "malloc");
np->user = &np->data[0];
(void)strcpy(np->user, user);
np->group = &np->data[ulen + 1];
(void)strcpy(np->group, group);
if (S_ISCHR(sp->st_mode) ||
S_ISBLK(sp->st_mode))
bcfile = 1;
if (f_flags) {
np->flags = &np->data[ulen + glen + 2];
(void)strcpy(np->flags, flags);
free(flags);
}
if (f_label) {
np->label = &np->data[ulen + glen + 2
+ (f_flags ? flen + 1 : 0)];
(void)strcpy(np->label, labelstr);
free(labelstr);
}
cur->fts_pointer = np;
}
}
++entries;
}
if (!entries)
return;
d.list = list;
d.entries = entries;
d.maxlen = maxlen;
if (needstats) {
d.bcfile = bcfile;
d.btotal = btotal;
(void)snprintf(buf, sizeof(buf), "%lu", maxblock);
d.s_block = strlen(buf);
d.s_flags = maxflags;
d.s_label = maxlabelstr;
d.s_group = maxgroup;
(void)snprintf(buf, sizeof(buf), "%lu", maxinode);
d.s_inode = strlen(buf);
(void)snprintf(buf, sizeof(buf), "%lu", maxnlink);
d.s_nlink = strlen(buf);
(void)snprintf(buf, sizeof(buf), "%qu", maxsize);
d.s_size = strlen(buf);
d.s_user = maxuser;
}
printfcn(&d);
output = 1;
if (f_longform)
for (cur = list; cur; cur = cur->fts_link)
free(cur->fts_pointer);
}
/*
* Ordering for mastercmp:
* If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
* as larger than directories. Within either group, use the sort function.
* All other levels use the sort function. Error entries remain unsorted.
*/
static int
mastercmp(const FTSENT * const *a, const FTSENT * const *b)
{
int a_info, b_info;
a_info = (*a)->fts_info;
if (a_info == FTS_ERR)
return (0);
b_info = (*b)->fts_info;
if (b_info == FTS_ERR)
return (0);
if (a_info == FTS_NS || b_info == FTS_NS)
return (namecmp(*a, *b));
if (a_info != b_info &&
(*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) {
if (a_info == FTS_D)
return (1);
if (b_info == FTS_D)
return (-1);
}
return (sortfcn(*a, *b));
}
/*
* Makenines() returns (10**n)-1. This is useful for converting a width
* into a number that wide in decimal.
*/
static u_quad_t
makenines(u_long n)
{
u_long i;
u_quad_t reg;
reg = 1;
/* Use a loop instead of pow(), since all values of n are small. */
for (i = 0; i < n; i++)
reg *= 10;
reg--;
return reg;
}
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