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D56772.diff
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D56772.diff

diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -51,6 +51,9 @@
# xargs -n1 | sort | uniq -d;
# done
+# 20260504: readlink is now a separate utility
+OLD_FILES+=usr/tests/usr.bin/stat/readlink_test
+
# 20260503: Kill off MANSUBDIRs
OLD_FILES+=usr/share/man/man8/amd64/apm.8.gz
OLD_FILES+=usr/share/man/man8/amd64/apmconf.8.gz
diff --git a/etc/mtree/BSD.tests.dist b/etc/mtree/BSD.tests.dist
--- a/etc/mtree/BSD.tests.dist
+++ b/etc/mtree/BSD.tests.dist
@@ -1217,6 +1217,8 @@
..
procstat
..
+ readlink
+ ..
renice
..
rs
diff --git a/usr.bin/Makefile b/usr.bin/Makefile
--- a/usr.bin/Makefile
+++ b/usr.bin/Makefile
@@ -118,6 +118,7 @@
procstat \
protect \
rctl \
+ readlink \
renice \
resizewin \
rev \
diff --git a/usr.bin/stat/Makefile b/usr.bin/readlink/Makefile
copy from usr.bin/stat/Makefile
copy to usr.bin/readlink/Makefile
--- a/usr.bin/stat/Makefile
+++ b/usr.bin/readlink/Makefile
@@ -1,9 +1,6 @@
.include <src.opts.mk>
-PROG= stat
-
-LINKS= ${BINDIR}/stat ${BINDIR}/readlink
-MLINKS= stat.1 readlink.1
+PROG= readlink
HAS_TESTS=
SUBDIR.${MK_TESTS}+= tests
diff --git a/usr.bin/readlink/readlink.1 b/usr.bin/readlink/readlink.1
new file mode 100644
--- /dev/null
+++ b/usr.bin/readlink/readlink.1
@@ -0,0 +1,51 @@
+.\"-
+.\" Copyright (c) 2026 Dag-Erling Smørgrav
+.\"
+.\" SPDX-License-Identifier: BSD-2-Clause
+.\"
+.Dd May 2, 2026
+.Dt READLINK 1
+.Os
+.Sh NAME
+.Nm readlink
+.Nd display the target of a symbolic link
+.Sh SYNOPSIS
+.Nm
+.Op Fl fn
+.Ar file
+.Op Ar ...
+.Sh DESCRIPTION
+If
+.Ar file
+is a symbolic link, the
+.Nm
+utility prints the target of said symbolic link to standard output.
+Otherwise, it prints an error message to standard error and exits with
+a non-zero status.
+.Pp
+The following options are available:
+.Bl -tag -width indent
+.It Fl f
+Print the canonical path of the target, even if the final component of
+the resolved path does not exist.
+.It Fl n
+Do not print a newline.
+.El
+.Sh EXIT STATUS
+.Ex -std
+.Sh SEE ALSO
+.Xr realpath 1 ,
+.Xr readlink 2
+.Sh STANDARDS
+The
+.Nm
+utility conforms to
+.St -p1003.1-2024 .
+Support for multiple arguments and the
+.Fl f
+option are non-standard extensions.
+.Sh AUTHORS
+The
+.Nm
+utility and this manual page were written by
+.An Dag-Erling Sm\(/orgrav Aq Mt des@FreeBSD.org .
diff --git a/usr.bin/readlink/readlink.c b/usr.bin/readlink/readlink.c
new file mode 100644
--- /dev/null
+++ b/usr.bin/readlink/readlink.c
@@ -0,0 +1,66 @@
+/*-
+ * Copyright (c) 2026 Dag-Erling Smørgrav <des@FreeBSD.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static void usage(void)
+{
+ fprintf(stderr, "usage: readlink [-fn] file [...]\n");
+ exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+ char path[PATH_MAX];
+ ssize_t len;
+ bool fflag, nflag;
+ int opt;
+
+ fflag = nflag = false;
+ while ((opt = getopt(argc, argv, "fn")) != -1) {
+ switch (opt) {
+ case 'f':
+ fflag = true;
+ break;
+ case 'n':
+ nflag = true;
+ break;
+ default:
+ usage();
+ }
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if (argc == 0)
+ usage();
+
+ while (argc-- > 0) {
+ if (fflag) {
+ if (realpath(*argv, path) == NULL && errno != ENOENT)
+ err(EXIT_FAILURE, "%s", *argv);
+ } else {
+ if ((len = readlink(*argv, path, sizeof(path))) < 0)
+ err(EXIT_FAILURE, "%s", *argv);
+ path[len] = '\0';
+ }
+ (void)printf("%s%s", path, nflag ? "" : "\n");
+ argv++;
+ }
+
+ if (fflush(stdout) != 0)
+ err(EXIT_FAILURE, "stdout");
+
+ exit(EXIT_SUCCESS);
+}
diff --git a/usr.bin/stat/tests/Makefile b/usr.bin/readlink/tests/Makefile
copy from usr.bin/stat/tests/Makefile
copy to usr.bin/readlink/tests/Makefile
--- a/usr.bin/stat/tests/Makefile
+++ b/usr.bin/readlink/tests/Makefile
@@ -1,4 +1,3 @@
ATF_TESTS_SH+= readlink_test
-ATF_TESTS_SH+= stat_test
.include <bsd.test.mk>
diff --git a/usr.bin/readlink/tests/readlink_test.sh b/usr.bin/readlink/tests/readlink_test.sh
new file mode 100755
--- /dev/null
+++ b/usr.bin/readlink/tests/readlink_test.sh
@@ -0,0 +1,105 @@
+#
+# Copyright (c) 2026 Dag-Erling Smørgrav <des@FreeBSD.org>
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+
+atf_test_case basic
+basic_head()
+{
+ atf_set "descr" "Basic usage"
+}
+basic_body()
+{
+ atf_check ln -s target link
+ atf_check -o inline:"target\n" readlink link
+ atf_check mkdir target
+ atf_check -o inline:"target\n" readlink link
+}
+
+atf_test_case noarg
+noarg_head()
+{
+ atf_set "descr" "No argument"
+}
+noarg_body()
+{
+ atf_check -s exit:1 -e match:"usage:" readlink
+}
+
+atf_test_case notlink
+notlink_head()
+{
+ atf_set "descr" "Argument is not a symbolic link"
+}
+notlink_body()
+{
+ atf_check touch file
+ atf_check mkdir dir
+ atf_check -s exit:1 -e match:"Invalid argument" readlink file
+ atf_check -s exit:1 -e match:"Invalid argument" readlink dir
+}
+
+atf_test_case multi
+multi_head()
+{
+ atf_set "descr" "Multiple arguments"
+}
+multi_body()
+{
+ atf_check ln -s targetA linkA
+ atf_check ln -s targetB linkB
+ atf_check -o inline:"targetA\ntargetB\n" readlink linkA linkB
+}
+
+atf_test_case f_flag
+f_flag_head()
+{
+ atf_set "descr" "Test the -f flag"
+}
+f_flag_body()
+{
+ cd "$(realpath "$PWD")" || atf_fail "failed to canonicalize $PWD"
+ atf_check ln -s target link
+ atf_check -o inline:"$PWD/target\n" readlink -f link
+}
+
+atf_test_case n_flag
+n_flag_head()
+{
+ atf_set "descr" "Test the -n flag"
+}
+n_flag_body()
+{
+ atf_check ln -s target link
+ atf_check -o inline:"target" readlink -n link
+}
+
+atf_test_case stdout
+stdout_head()
+{
+ atf_set "descr" "Failure to write to stdout"
+}
+stdout_body()
+{
+ atf_check ln -s target link
+ (
+ trap "" PIPE
+ sleep 1
+ readlink link 2>stderr
+ echo $? >result
+ ) | true
+ atf_check -o inline:"1\n" cat result
+ atf_check -o match:"stdout" cat stderr
+}
+
+atf_init_test_cases()
+{
+ atf_add_test_case basic
+ atf_add_test_case noarg
+ atf_add_test_case notlink
+ atf_add_test_case multi
+ atf_add_test_case f_flag
+ atf_add_test_case n_flag
+ atf_add_test_case stdout
+}
diff --git a/usr.bin/stat/Makefile b/usr.bin/stat/Makefile
--- a/usr.bin/stat/Makefile
+++ b/usr.bin/stat/Makefile
@@ -2,9 +2,6 @@
PROG= stat
-LINKS= ${BINDIR}/stat ${BINDIR}/readlink
-MLINKS= stat.1 readlink.1
-
HAS_TESTS=
SUBDIR.${MK_TESTS}+= tests
diff --git a/usr.bin/stat/stat.1 b/usr.bin/stat/stat.1
--- a/usr.bin/stat/stat.1
+++ b/usr.bin/stat/stat.1
@@ -33,8 +33,7 @@
.Dt STAT 1
.Os
.Sh NAME
-.Nm stat ,
-.Nm readlink
+.Nm stat
.Nd display file status
.Sh SYNOPSIS
.Nm
@@ -42,9 +41,6 @@
.Op Fl f Ar format | Fl l | r | s | x
.Op Fl t Ar timefmt
.Op Ar
-.Nm readlink
-.Op Fl fn
-.Op Ar
.Sh DESCRIPTION
The
.Nm
@@ -57,24 +53,6 @@
.Nm
displays information about the file descriptor for standard input.
.Pp
-When invoked as
-.Nm readlink ,
-only the target of the symbolic link is printed.
-If the given argument is not a symbolic link and the
-.Fl f
-option is not specified,
-.Nm readlink
-will print nothing and exit with an error.
-If the
-.Fl f
-option is specified, the output is canonicalized by following every symlink
-in every component of the given path recursively.
-.Nm readlink
-will resolve both absolute and relative paths, and return the absolute pathname
-corresponding to
-.Ar file .
-In this case, the argument does not need to be a symbolic link.
-.Pp
The information displayed is obtained by calling
.Xr lstat 2
with the given argument and evaluating the returned structure.
@@ -194,9 +172,6 @@
or
.Xr lstat 2
fail.
-When run as
-.Nm readlink ,
-error messages are automatically suppressed.
.It Fl f Ar format
Display information using the specified format.
See the
@@ -512,7 +487,7 @@
which default to
.Cm S .
.Sh EXIT STATUS
-.Ex -std stat readlink
+.Ex -std stat
.Sh EXAMPLES
If no options are specified, the default format is
"%d %i %Sp %l %Su %Sg %r %z \e"%Sa\e" \e"%Sm\e" \e"%Sc\e" \e"%SB\e" %k %b %#Xf %N".
@@ -624,7 +599,6 @@
.Xr file 1 ,
.Xr ls 1 ,
.Xr lstat 2 ,
-.Xr readlink 2 ,
.Xr stat 2 ,
.Xr printf 3 ,
.Xr strftime 3
diff --git a/usr.bin/stat/stat.c b/usr.bin/stat/stat.c
--- a/usr.bin/stat/stat.c
+++ b/usr.bin/stat/stat.c
@@ -138,7 +138,6 @@
#define SHOW_filename 'N'
#define SHOW_sizerdev 'Z'
-static void usage(const char *);
static void output(const struct stat *, const char *, const char *, int);
static int format1(const struct stat *, /* stat info */
const char *, /* the file name */
@@ -152,7 +151,6 @@
static int listholes(const char *);
static const char *timefmt;
-static int linkfail;
static bool nonl;
#define addchar(s, c, nl) \
@@ -161,18 +159,27 @@
(*nl) = ((c) == '\n'); \
} while (0/*CONSTCOND*/)
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr, "usage: stat [-FHhLnq] "
+ "[-f format | -l | -r | -s | -x] "
+ "[-t timefmt] [file|handle ...]");
+ exit(1);
+}
+
int
main(int argc, char *argv[])
{
struct stat st;
char dname[sizeof(_PATH_DEV) + SPECNAMELEN] = _PATH_DEV;
- const char *statfmt, *options, *synopsis;
+ const char *statfmt;
const char *file;
fhandle_t fhnd;
- int ch, rc, errs, am_readlink, fn, fmtchar;
+ int ch, rc, errs, fn, fmtchar;
bool lsF, holes, usestat, nfs_handle, quiet;
- am_readlink = 0;
errs = 0;
lsF = false;
fmtchar = '\0';
@@ -181,24 +188,10 @@
nfs_handle = false;
nonl = false;
quiet = false;
- linkfail = 0;
statfmt = NULL;
timefmt = NULL;
- if (strcmp(getprogname(), "readlink") == 0) {
- am_readlink = 1;
- options = "fn";
- synopsis = "[-fn] [file ...]";
- statfmt = "%Y";
- fmtchar = 'f';
- quiet = 1;
- } else {
- options = "Ff:HhLlnqrst:x";
- synopsis = "[-FHhLnq] [-f format | -l | -r | -s | -x] "
- "[-t timefmt] [file|handle ...]";
- }
-
- while ((ch = getopt(argc, argv, options)) != -1)
+ while ((ch = getopt(argc, argv, "Ff:HhLlnqrst:x")) != -1)
switch (ch) {
case 'F':
lsF = true;
@@ -223,10 +216,6 @@
break;
/* remaining cases are purposefully out of order */
case 'f':
- if (am_readlink) {
- statfmt = "%R";
- break;
- }
statfmt = optarg;
/* FALLTHROUGH */
case 'l':
@@ -239,7 +228,7 @@
fmtchar = ch;
break;
default:
- usage(synopsis);
+ usage();
}
argc -= optind;
@@ -248,7 +237,7 @@
if (holes) {
if (fmtchar || lsF || nfs_handle || usestat || timefmt)
- usage(synopsis);
+ usage();
if (argc > 0) {
while (argc-- > 0) {
if (listholes(*argv) != 0) {
@@ -299,7 +288,7 @@
timefmt = "%c";
break;
default:
- usage(synopsis);
+ usage();
/*NOTREACHED*/
}
@@ -354,7 +343,6 @@
if (rc == -1) {
errs = 1;
- linkfail = 1;
if (!quiet)
warn("%s", file);
} else
@@ -365,7 +353,7 @@
fn++;
} while (argc > 0);
- return (am_readlink ? linkfail : errs);
+ return (errs);
}
/*
@@ -385,13 +373,6 @@
return (str);
}
-static void
-usage(const char *synopsis)
-{
- (void)fprintf(stderr, "usage: %s %s\n", getprogname(), synopsis);
- exit(1);
-}
-
/*
* Parses a format string.
*/
@@ -797,7 +778,6 @@
} else {
snprintf(path, sizeof(path), " -> ");
if (realpath(file, path + 4) == NULL) {
- linkfail = 1;
l = 0;
path[0] = '\0';
}
@@ -815,7 +795,6 @@
snprintf(path, sizeof(path), " -> ");
l = readlink(file, path + 4, sizeof(path) - 4 - 1);
if (l == -1) {
- linkfail = 1;
l = 0;
path[0] = '\0';
}
@@ -823,7 +802,6 @@
sdata = path + (ofmt == FMTF_STRING ? 0 : 4);
}
else {
- linkfail = 1;
sdata = "";
}
formats = FMTF_STRING;
diff --git a/usr.bin/stat/tests/Makefile b/usr.bin/stat/tests/Makefile
--- a/usr.bin/stat/tests/Makefile
+++ b/usr.bin/stat/tests/Makefile
@@ -1,4 +1,3 @@
-ATF_TESTS_SH+= readlink_test
ATF_TESTS_SH+= stat_test
.include <bsd.test.mk>
diff --git a/usr.bin/stat/tests/readlink_test.sh b/usr.bin/stat/tests/readlink_test.sh
deleted file mode 100755
--- a/usr.bin/stat/tests/readlink_test.sh
+++ /dev/null
@@ -1,75 +0,0 @@
-#
-# Copyright (c) 2017 Dell EMC
-# All rights reserved.
-#
-# 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.
-#
-# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
-#
-
-atf_test_case basic
-basic_head()
-{
- atf_set "descr" "Verify that calling readlink without any flags " \
- "prints out the symlink target for a file"
-}
-basic_body()
-{
- atf_check ln -s foo bar
- atf_check -o inline:"foo\n" readlink bar
-}
-
-atf_test_case f_flag
-f_flag_head()
-{
- atf_set "descr" "Verify that calling readlink with -f will not emit " \
- "an error message/exit with a non-zero code"
-}
-f_flag_body()
-{
- cd "$(realpath "$PWD")"
- atf_check touch A.file
- atf_check ln -s nonexistent A.link
- atf_check -o inline:"nonexistent\n" \
- -s exit:1 readlink A.file A.link
- atf_check -o inline:"$(realpath A.file)\n$PWD/nonexistent\n" \
- -s exit:1 readlink -f A.file A.link
-}
-
-atf_test_case n_flag
-n_flag_head()
-{
- atf_set "descr" "Verify that calling readlink with -n will not emit " \
- "a newline character."
-}
-n_flag_body()
-{
- atf_check ln -s nonexistent.A A
- atf_check ln -s nonexistent.B B
- atf_check -o inline:"nonexistent.A\nnonexistent.B\n" readlink A B
- atf_check -o inline:"nonexistent.Anonexistent.B" readlink -n A B
-}
-
-atf_init_test_cases()
-{
- atf_add_test_case basic
- atf_add_test_case f_flag
- atf_add_test_case n_flag
-}

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