utils

commit: 2ad2f5fd5e92dc1fe38025a3be0865ac4bdb60d5
parent 950e3a9c99ff0d965077b3013783a3612d7d7b38
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Tue, 10 May 2022 18:59:34 +0200

bin/unlink: New util

Diffstat:
A
bin/unlink.1
25
+++++++++++++++++++++++++
A
bin/unlink.c
19
+++++++++++++++++++
M
coreutils.txt
2
+-
M
test-bin/Kyuafile
1
+
A
test-bin/unlink
21
+++++++++++++++++++++

5 files changed, 67 insertions(+), 1 deletion(-)
diff --git a/bin/unlink.1 b/bin/unlink.1
@@ -0,0 +1,25 @@
+.\" Collection of Unix tools, comparable to coreutils
+.\" Copyright 2017-2022 Haelwenn (lanodan) Monnier <contact+utils@hacktivis.me>
+.\" SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+.Dd 2022-05-10
+.Dt UNLINK 1
+.Os
+.Sh NAME
+.Nm unlink
+.Nd unlink filenames and possibly the referred files
+.Sh SYNOPSIS
+.Nm
+.Op Ar files ...
+.Sh DESCRIPTION
+.Nm
+deletes a filename from the filesystem.
+If that filename was the last link to a file and no processes have the file open, the file is deleted.
+.Sh EXIT STATUS
+.Ex -std
+.Sh STANDARDS
+.Nm
+is compliant with the
+.St -p1003.1-2008
+specification.
+.Sh AUTHORS
+.An Haelwenn (lanodan) Monnier Aq Mt contact@hacktivis.me
diff --git a/bin/unlink.c b/bin/unlink.c
@@ -0,0 +1,19 @@
+#include <errno.h>  // errno
+#include <stdio.h>  // fprintf
+#include <string.h> // strerror
+#include <unistd.h> // unlink
+
+int
+main(int argc, char *argv[])
+{
+	for(int i = 1; i < argc; i++)
+	{
+		if(unlink(argv[i]) != 0)
+		{
+			fprintf(stderr, "unlink: Cannot unlink ‘%s’: %s\n", argv[i], strerror(errno));
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/coreutils.txt b/coreutils.txt
@@ -95,7 +95,7 @@ tty: Done
 uname: Use sname
 unexpand: Use sed
 uniq: Todo
-unlink: Todo
+unlink: Done
 users: No, use who
 vdir: No, use ls
 wc: Todo
diff --git a/test-bin/Kyuafile b/test-bin/Kyuafile
@@ -29,3 +29,4 @@ atf_test_program{name="tee", required_files=basedir.."/bin/tee", timeout=1}
 atf_test_program{name="true", required_files=basedir.."/bin/true", timeout=1}
 atf_test_program{name="tty", required_files=basedir.."/bin/tty", timeout=1}
 atf_test_program{name="xcd", required_files=basedir.."/bin/xcd", timeout=1}
+atf_test_program{name="unlink", required_files=basedir.."/bin/unlink", timeout=1}
diff --git a/test-bin/unlink b/test-bin/unlink
@@ -0,0 +1,21 @@
+#!/usr/bin/env atf-sh
+atf_test_case basic cleanup
+basic_body() {
+	touch inputs/unlink-this || atf_fail "touch inputs/unlink-this"
+	atf_check ../bin/unlink inputs/unlink-this
+}
+basic_cleanup() {
+	rm -f inputs/unlink-this || atf_fail "rm -f inputs/unlink-this"
+}
+
+atf_test_case enoent
+enoent_body() {
+	# shellcheck disable=SC1112
+	atf_check -s exit:1 -e 'inline:unlink: Cannot unlink ‘/var/empty/e/no/ent’: No such file or directory\n' ../bin/unlink /var/empty/e/no/ent
+}
+
+atf_init_test_cases() {
+	cd "$(atf_get_srcdir)" || exit 1
+	atf_add_test_case basic
+	atf_add_test_case enoent
+}