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freebsd-dev/bin/ls/print.c
Warner Losh fbbd9655e5 Renumber copyright clause 4 
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00

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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. 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.
*/
#if 0
#ifndef lint
static char sccsid[] = "@(#)print.c 8.4 (Berkeley) 4/17/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/acl.h>
#include <err.h>
#include <errno.h>
#include <fts.h>
#include <langinfo.h>
#include <libutil.h>
#include <limits.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <wchar.h>
#ifdef COLORLS
#include <ctype.h>
#include <termcap.h>
#include <signal.h>
#endif
#include <libxo/xo.h>
#include "ls.h"
#include "extern.h"
static int printaname(const FTSENT *, u_long, u_long);
static void printdev(size_t, dev_t);
static void printlink(const FTSENT *);
static void printtime(const char *, time_t);
static int printtype(u_int);
static void printsize(const char *, size_t, off_t);
#ifdef COLORLS
static void endcolor(int);
static int colortype(mode_t);
#endif
static void aclmode(char *, const FTSENT *);
#define IS_NOPRINT(p) ((p)->fts_number == NO_PRINT)
#ifdef COLORLS
/* Most of these are taken from <sys/stat.h> */
typedef enum Colors {
C_DIR, /* directory */
C_LNK, /* symbolic link */
C_SOCK, /* socket */
C_FIFO, /* pipe */
C_EXEC, /* executable */
C_BLK, /* block special */
C_CHR, /* character special */
C_SUID, /* setuid executable */
C_SGID, /* setgid executable */
C_WSDIR, /* directory writeble to others, with sticky
* bit */
C_WDIR, /* directory writeble to others, without
* sticky bit */
C_NUMCOLORS /* just a place-holder */
} Colors;
static const char *defcolors = "exfxcxdxbxegedabagacad";
/* colors for file types */
static struct {
int num[2];
int bold;
} colors[C_NUMCOLORS];
#endif
static size_t padding_for_month[12];
static size_t month_max_size = 0;
void
printscol(const DISPLAY *dp)
{
FTSENT *p;
xo_open_list("entry");
for (p = dp->list; p; p = p->fts_link) {
if (IS_NOPRINT(p))
continue;
xo_open_instance("entry");
(void)printaname(p, dp->s_inode, dp->s_block);
xo_close_instance("entry");
xo_emit("\n");
}
xo_close_list("entry");
}
/*
* print name in current style
*/
int
printname(const char *field, const char *name)
{
char fmt[BUFSIZ];
char *s = getname(name);
int rc;
snprintf(fmt, sizeof(fmt), "{:%s/%%hs}", field);
rc = xo_emit(fmt, s);
free(s);
return rc;
}
static const char *
get_abmon(int mon)
{
switch (mon) {
case 0: return (nl_langinfo(ABMON_1));
case 1: return (nl_langinfo(ABMON_2));
case 2: return (nl_langinfo(ABMON_3));
case 3: return (nl_langinfo(ABMON_4));
case 4: return (nl_langinfo(ABMON_5));
case 5: return (nl_langinfo(ABMON_6));
case 6: return (nl_langinfo(ABMON_7));
case 7: return (nl_langinfo(ABMON_8));
case 8: return (nl_langinfo(ABMON_9));
case 9: return (nl_langinfo(ABMON_10));
case 10: return (nl_langinfo(ABMON_11));
case 11: return (nl_langinfo(ABMON_12));
}
/* should never happen */
abort();
}
static size_t
mbswidth(const char *month)
{
wchar_t wc;
size_t width, donelen, clen, w;
width = donelen = 0;
while ((clen = mbrtowc(&wc, month + donelen, MB_LEN_MAX, NULL)) != 0) {
if (clen == (size_t)-1 || clen == (size_t)-2)
return (-1);
donelen += clen;
if ((w = wcwidth(wc)) == (size_t)-1)
return (-1);
width += w;
}
return (width);
}
static void
compute_abbreviated_month_size(void)
{
int i;
size_t width;
size_t months_width[12];
for (i = 0; i < 12; i++) {
width = mbswidth(get_abmon(i));
if (width == (size_t)-1) {
month_max_size = -1;
return;
}
months_width[i] = width;
if (width > month_max_size)
month_max_size = width;
}
for (i = 0; i < 12; i++)
padding_for_month[i] = month_max_size - months_width[i];
}
/*
* print name in current style
*/
char *
getname(const char *name)
{
if (f_octal || f_octal_escape)
return get_octal(name);
else if (f_nonprint)
return get_printable(name);
else
return strdup(name);
}
void
printlong(const DISPLAY *dp)
{
struct stat *sp;
FTSENT *p;
NAMES *np;
char buf[20];
#ifdef COLORLS
int color_printed = 0;
#endif
if ((dp->list == NULL || dp->list->fts_level != FTS_ROOTLEVEL) &&
(f_longform || f_size)) {
xo_emit("{L:total} {:total-blocks/%lu}\n",
howmany(dp->btotal, blocksize));
}
xo_open_list("entry");
for (p = dp->list; p; p = p->fts_link) {
char *name, *type;
if (IS_NOPRINT(p))
continue;
xo_open_instance("entry");
sp = p->fts_statp;
name = getname(p->fts_name);
if (name)
xo_emit("{ke:name/%hs}", name);
if (f_inode)
xo_emit("{t:inode/%*ju} ",
dp->s_inode, (uintmax_t)sp->st_ino);
if (f_size)
xo_emit("{t:blocks/%*jd} ",
dp->s_block, howmany(sp->st_blocks, blocksize));
strmode(sp->st_mode, buf);
aclmode(buf, p);
np = p->fts_pointer;
xo_attr("value", "%03o", (int) sp->st_mode & ALLPERMS);
if (f_numericonly) {
xo_emit("{t:mode/%s}{e:mode_octal/%03o} {t:links/%*ju} {td:user/%-*s}{e:user/%ju} {td:group/%-*s}{e:group/%ju} ",
buf, (int) sp->st_mode & ALLPERMS, dp->s_nlink, (uintmax_t)sp->st_nlink,
dp->s_user, np->user, (uintmax_t)sp->st_uid, dp->s_group, np->group, (uintmax_t)sp->st_gid);
} else {
xo_emit("{t:mode/%s}{e:mode_octal/%03o} {t:links/%*ju} {t:user/%-*s} {t:group/%-*s} ",
buf, (int) sp->st_mode & ALLPERMS, dp->s_nlink, (uintmax_t)sp->st_nlink,
dp->s_user, np->user, dp->s_group, np->group);
}
if (S_ISBLK(sp->st_mode))
asprintf(&type, "block");
if (S_ISCHR(sp->st_mode))
asprintf(&type, "character");
if (S_ISDIR(sp->st_mode))
asprintf(&type, "directory");
if (S_ISFIFO(sp->st_mode))
asprintf(&type, "fifo");
if (S_ISLNK(sp->st_mode))
asprintf(&type, "symlink");
if (S_ISREG(sp->st_mode))
asprintf(&type, "regular");
if (S_ISSOCK(sp->st_mode))
asprintf(&type, "socket");
if (S_ISWHT(sp->st_mode))
asprintf(&type, "whiteout");
xo_emit("{e:type/%s}", type);
free(type);
if (f_flags)
xo_emit("{:flags/%-*s} ", dp->s_flags, np->flags);
if (f_label)
xo_emit("{t:label/%-*s} ", dp->s_label, np->label);
if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode))
printdev(dp->s_size, sp->st_rdev);
else
printsize("size", dp->s_size, sp->st_size);
if (f_accesstime)
printtime("access-time", sp->st_atime);
else if (f_birthtime)
printtime("birth-time", sp->st_birthtime);
else if (f_statustime)
printtime("change-time", sp->st_ctime);
else
printtime("modify-time", sp->st_mtime);
#ifdef COLORLS
if (f_color)
color_printed = colortype(sp->st_mode);
#endif
if (name) {
xo_emit("{dk:name/%hs}", name);
free(name);
}
#ifdef COLORLS
if (f_color && color_printed)
endcolor(0);
#endif
if (f_type)
(void)printtype(sp->st_mode);
if (S_ISLNK(sp->st_mode))
printlink(p);
xo_close_instance("entry");
xo_emit("\n");
}
xo_close_list("entry");
}
void
printstream(const DISPLAY *dp)
{
FTSENT *p;
int chcnt;
xo_open_list("entry");
for (p = dp->list, chcnt = 0; p; p = p->fts_link) {
if (p->fts_number == NO_PRINT)
continue;
/* XXX strlen does not take octal escapes into account. */
if (strlen(p->fts_name) + chcnt +
(p->fts_link ? 2 : 0) >= (unsigned)termwidth) {
xo_emit("\n");
chcnt = 0;
}
xo_open_instance("file");
chcnt += printaname(p, dp->s_inode, dp->s_block);
xo_close_instance("file");
if (p->fts_link) {
xo_emit(", ");
chcnt += 2;
}
}
xo_close_list("entry");
if (chcnt)
xo_emit("\n");
}
void
printcol(const DISPLAY *dp)
{
static FTSENT **array;
static int lastentries = -1;
FTSENT *p;
FTSENT **narray;
int base;
int chcnt;
int cnt;
int col;
int colwidth;
int endcol;
int num;
int numcols;
int numrows;
int row;
int tabwidth;
if (f_notabs)
tabwidth = 1;
else
tabwidth = 8;
/*
* Have to do random access in the linked list -- build a table
* of pointers.
*/
if (dp->entries > lastentries) {
if ((narray =
realloc(array, dp->entries * sizeof(FTSENT *))) == NULL) {
printscol(dp);
return;
}
lastentries = dp->entries;
array = narray;
}
for (p = dp->list, num = 0; p; p = p->fts_link)
if (p->fts_number != NO_PRINT)
array[num++] = p;
colwidth = dp->maxlen;
if (f_inode)
colwidth += dp->s_inode + 1;
if (f_size)
colwidth += dp->s_block + 1;
if (f_type)
colwidth += 1;
colwidth = (colwidth + tabwidth) & ~(tabwidth - 1);
if (termwidth < 2 * colwidth) {
printscol(dp);
return;
}
numcols = termwidth / colwidth;
numrows = num / numcols;
if (num % numcols)
++numrows;
if ((dp->list == NULL || dp->list->fts_level != FTS_ROOTLEVEL) &&
(f_longform || f_size)) {
xo_emit("{L:total} {:total-blocks/%lu}\n",
howmany(dp->btotal, blocksize));
}
xo_open_list("entry");
base = 0;
for (row = 0; row < numrows; ++row) {
endcol = colwidth;
if (!f_sortacross)
base = row;
for (col = 0, chcnt = 0; col < numcols; ++col) {
xo_open_instance("entry");
chcnt += printaname(array[base], dp->s_inode,
dp->s_block);
xo_close_instance("entry");
if (f_sortacross)
base++;
else
base += numrows;
if (base >= num)
break;
while ((cnt = ((chcnt + tabwidth) & ~(tabwidth - 1)))
<= endcol) {
if (f_sortacross && col + 1 >= numcols)
break;
xo_emit(f_notabs ? " " : "\t");
chcnt = cnt;
}
endcol += colwidth;
}
xo_emit("\n");
}
xo_close_list("entry");
}
/*
* print [inode] [size] name
* return # of characters printed, no trailing characters.
*/
static int
printaname(const FTSENT *p, u_long inodefield, u_long sizefield)
{
struct stat *sp;
int chcnt;
#ifdef COLORLS
int color_printed = 0;
#endif
sp = p->fts_statp;
chcnt = 0;
if (f_inode)
chcnt += xo_emit("{t:inode/%*ju} ",
(int)inodefield, (uintmax_t)sp->st_ino);
if (f_size)
chcnt += xo_emit("{t:size/%*jd} ",
(int)sizefield, howmany(sp->st_blocks, blocksize));
#ifdef COLORLS
if (f_color)
color_printed = colortype(sp->st_mode);
#endif
chcnt += printname("name", p->fts_name);
#ifdef COLORLS
if (f_color && color_printed)
endcolor(0);
#endif
if (f_type)
chcnt += printtype(sp->st_mode);
return (chcnt);
}
/*
* Print device special file major and minor numbers.
*/
static void
printdev(size_t width, dev_t dev)
{
xo_emit("{:device/%#*jx} ", (u_int)width, (uintmax_t)dev);
}
static size_t
ls_strftime(char *str, size_t len, const char *fmt, const struct tm *tm)
{
char *posb, nfmt[BUFSIZ];
const char *format = fmt;
size_t ret;
if ((posb = strstr(fmt, "%b")) != NULL) {
if (month_max_size == 0) {
compute_abbreviated_month_size();
}
if (month_max_size > 0) {
snprintf(nfmt, sizeof(nfmt), "%.*s%s%*s%s",
(int)(posb - fmt), fmt,
get_abmon(tm->tm_mon),
(int)padding_for_month[tm->tm_mon],
"",
posb + 2);
format = nfmt;
}
}
ret = strftime(str, len, format, tm);
return (ret);
}
static void
printtime(const char *field, time_t ftime)
{
char longstring[80];
char fmt[BUFSIZ];
static time_t now = 0;
const char *format;
static int d_first = -1;
if (d_first < 0)
d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
if (now == 0)
now = time(NULL);
#define SIXMONTHS ((365 / 2) * 86400)
if (f_timeformat) /* user specified format */
format = f_timeformat;
else if (f_sectime)
/* mmm dd hh:mm:ss yyyy || dd mmm hh:mm:ss yyyy */
format = d_first ? "%e %b %T %Y" : "%b %e %T %Y";
else if (ftime + SIXMONTHS > now && ftime < now + SIXMONTHS)
/* mmm dd hh:mm || dd mmm hh:mm */
format = d_first ? "%e %b %R" : "%b %e %R";
else
/* mmm dd yyyy || dd mmm yyyy */
format = d_first ? "%e %b %Y" : "%b %e %Y";
ls_strftime(longstring, sizeof(longstring), format, localtime(&ftime));
snprintf(fmt, sizeof(fmt), "{d:%s/%%hs} ", field);
xo_attr("value", "%ld", (long) ftime);
xo_emit(fmt, longstring);
snprintf(fmt, sizeof(fmt), "{en:%s/%%ld}", field);
xo_emit(fmt, (long) ftime);
}
static int
printtype(u_int mode)
{
if (f_slash) {
if ((mode & S_IFMT) == S_IFDIR) {
xo_emit("{D:\\/}{e:type/directory}");
return (1);
}
return (0);
}
switch (mode & S_IFMT) {
case S_IFDIR:
xo_emit("{D:/\\/}{e:type/directory}");
return (1);
case S_IFIFO:
xo_emit("{D:|}{e:type/fifo}");
return (1);
case S_IFLNK:
xo_emit("{D:@}{e:type/link}");
return (1);
case S_IFSOCK:
xo_emit("{D:=}{e:type/socket}");
return (1);
case S_IFWHT:
xo_emit("{D:%%}{e:type/whiteout}");
return (1);
default:
break;
}
if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
xo_emit("{D:*}{e:executable/}");
return (1);
}
return (0);
}
#ifdef COLORLS
static int
putch(int c)
{
xo_emit("{D:/%c}", c);
return 0;
}
static int
writech(int c)
{
char tmp = (char)c;
(void)write(STDOUT_FILENO, &tmp, 1);
return 0;
}
static void
printcolor(Colors c)
{
char *ansiseq;
if (colors[c].bold)
tputs(enter_bold, 1, putch);
if (colors[c].num[0] != -1) {
ansiseq = tgoto(ansi_fgcol, 0, colors[c].num[0]);
if (ansiseq)
tputs(ansiseq, 1, putch);
}
if (colors[c].num[1] != -1) {
ansiseq = tgoto(ansi_bgcol, 0, colors[c].num[1]);
if (ansiseq)
tputs(ansiseq, 1, putch);
}
}
static void
endcolor(int sig)
{
tputs(ansi_coloff, 1, sig ? writech : putch);
tputs(attrs_off, 1, sig ? writech : putch);
}
static int
colortype(mode_t mode)
{
switch (mode & S_IFMT) {
case S_IFDIR:
if (mode & S_IWOTH)
if (mode & S_ISTXT)
printcolor(C_WSDIR);
else
printcolor(C_WDIR);
else
printcolor(C_DIR);
return (1);
case S_IFLNK:
printcolor(C_LNK);
return (1);
case S_IFSOCK:
printcolor(C_SOCK);
return (1);
case S_IFIFO:
printcolor(C_FIFO);
return (1);
case S_IFBLK:
printcolor(C_BLK);
return (1);
case S_IFCHR:
printcolor(C_CHR);
return (1);
default:;
}
if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
if (mode & S_ISUID)
printcolor(C_SUID);
else if (mode & S_ISGID)
printcolor(C_SGID);
else
printcolor(C_EXEC);
return (1);
}
return (0);
}
void
parsecolors(const char *cs)
{
int i;
int j;
size_t len;
char c[2];
short legacy_warn = 0;
if (cs == NULL)
cs = ""; /* LSCOLORS not set */
len = strlen(cs);
for (i = 0; i < (int)C_NUMCOLORS; i++) {
colors[i].bold = 0;
if (len <= 2 * (size_t)i) {
c[0] = defcolors[2 * i];
c[1] = defcolors[2 * i + 1];
} else {
c[0] = cs[2 * i];
c[1] = cs[2 * i + 1];
}
for (j = 0; j < 2; j++) {
/* Legacy colours used 0-7 */
if (c[j] >= '0' && c[j] <= '7') {
colors[i].num[j] = c[j] - '0';
if (!legacy_warn) {
xo_warnx("LSCOLORS should use "
"characters a-h instead of 0-9 ("
"see the manual page)");
}
legacy_warn = 1;
} else if (c[j] >= 'a' && c[j] <= 'h')
colors[i].num[j] = c[j] - 'a';
else if (c[j] >= 'A' && c[j] <= 'H') {
colors[i].num[j] = c[j] - 'A';
colors[i].bold = 1;
} else if (tolower((unsigned char)c[j]) == 'x')
colors[i].num[j] = -1;
else {
xo_warnx("invalid character '%c' in LSCOLORS"
" env var", c[j]);
colors[i].num[j] = -1;
}
}
}
}
void
colorquit(int sig)
{
endcolor(sig);
(void)signal(sig, SIG_DFL);
(void)kill(getpid(), sig);
}
#endif /* COLORLS */
static void
printlink(const FTSENT *p)
{
int lnklen;
char name[MAXPATHLEN + 1];
char path[MAXPATHLEN + 1];
if (p->fts_level == FTS_ROOTLEVEL)
(void)snprintf(name, sizeof(name), "%s", p->fts_name);
else
(void)snprintf(name, sizeof(name),
"%s/%s", p->fts_parent->fts_accpath, p->fts_name);
if ((lnklen = readlink(name, path, sizeof(path) - 1)) == -1) {
xo_error("\nls: %s: %s\n", name, strerror(errno));
return;
}
path[lnklen] = '\0';
xo_emit(" -> ");
(void)printname("target", path);
}
static void
printsize(const char *field, size_t width, off_t bytes)
{
char fmt[BUFSIZ];
if (f_humanval) {
/*
* Reserve one space before the size and allocate room for
* the trailing '\0'.
*/
char buf[HUMANVALSTR_LEN - 1 + 1];
humanize_number(buf, sizeof(buf), (int64_t)bytes, "",
HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
snprintf(fmt, sizeof(fmt), "{:%s/%%%ds} ", field, (int) width);
xo_attr("value", "%jd", (intmax_t) bytes);
xo_emit(fmt, buf);
} else { /* with commas */
/* This format assignment needed to work round gcc bug. */
snprintf(fmt, sizeof(fmt), "{:%s/%%%dj%sd} ",
field, (int) width, f_thousands ? "'" : "");
xo_emit(fmt, (intmax_t) bytes);
}
}
/*
* Add a + after the standard rwxrwxrwx mode if the file has an
* ACL. strmode() reserves space at the end of the string.
*/
static void
aclmode(char *buf, const FTSENT *p)
{
char name[MAXPATHLEN + 1];
int ret, trivial;
static dev_t previous_dev = NODEV;
static int supports_acls = -1;
static int type = ACL_TYPE_ACCESS;
acl_t facl;
/*
* XXX: ACLs are not supported on whiteouts and device files
* residing on UFS.
*/
if (S_ISCHR(p->fts_statp->st_mode) || S_ISBLK(p->fts_statp->st_mode) ||
S_ISWHT(p->fts_statp->st_mode))
return;
if (previous_dev == p->fts_statp->st_dev && supports_acls == 0)
return;
if (p->fts_level == FTS_ROOTLEVEL)
snprintf(name, sizeof(name), "%s", p->fts_name);
else
snprintf(name, sizeof(name), "%s/%s",
p->fts_parent->fts_accpath, p->fts_name);
if (previous_dev != p->fts_statp->st_dev) {
previous_dev = p->fts_statp->st_dev;
supports_acls = 0;
ret = lpathconf(name, _PC_ACL_NFS4);
if (ret > 0) {
type = ACL_TYPE_NFS4;
supports_acls = 1;
} else if (ret < 0 && errno != EINVAL) {
xo_warn("%s", name);
return;
}
if (supports_acls == 0) {
ret = lpathconf(name, _PC_ACL_EXTENDED);
if (ret > 0) {
type = ACL_TYPE_ACCESS;
supports_acls = 1;
} else if (ret < 0 && errno != EINVAL) {
xo_warn("%s", name);
return;
}
}
}
if (supports_acls == 0)
return;
facl = acl_get_link_np(name, type);
if (facl == NULL) {
xo_warn("%s", name);
return;
}
if (acl_is_trivial_np(facl, &trivial)) {
acl_free(facl);
xo_warn("%s", name);
return;
}
if (!trivial)
buf[10] = '+';
acl_free(facl);
}
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