Page MenuHomeFreeBSD
Files F142720749

D49850.id153716.diff
No OneTemporary
Actions

D49850.id153716.diff
View Options

diff --git a/usr.bin/runat/Makefile.xattr b/usr.bin/runat/Makefile
--- a/usr.bin/runat/Makefile.xattr
+++ b/usr.bin/runat/Makefile
@@ -0,0 +1,3 @@
+PROG= runat
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/runat/runat.1.xattr b/usr.bin/runat/runat.1
--- a/usr.bin/runat/runat.1.xattr
+++ b/usr.bin/runat/runat.1
@@ -0,0 +1,76 @@
+.\" Copyright (c) 2025 Rick Macklem.
+.\"
+.\" 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 COPYRIGHT HOLDERS ``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 COPYRIGHT HOLDERS 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.
+.\"
+.Dd April 15, 2025
+.Dt RUNAT 1
+.Os
+.Sh NAME
+.Nm runat
+.Nd run a shell command on a named attribute directory
+.Sh SYNOPSIS
+.Nm
+.Op Fl c
+.Op Fl -
+.Op Ar file
+.Op Ar shell command
+.Sh DESCRIPTION
+The
+.Nm
+utility runs the shell command on the named attribute directory for the
+.Fa file
+argument.
+It does a
+.Fn fchdir
+system call in a child process to change the current working directory into the
+named attribute directory for the
+.Fa file
+argument and then performs the shell command via
+.Xr system 3 .
+.Pp
+The options are as follows:
+.Bl -tag -width indent
+.It Fl c
+Create the named attribute directory if it does not already exist.
+.It Fl -
+Used if the
+.Fa file
+argument happens to be called
+.Dq -c .
+.El
+.Sh EXAMPLES
+For a file called
+.Dq myfile :
+.Bd -literal
+$ runat myfile ls -l # lists the attributes for myfile
+$ runat myfile cp /etc/hosts attrhosts # creates attrhosts
+$ runat myfile cat attrhosts # displays contents of attrhosts
+.Ed
+.Sh SEE ALSO
+.Xr open 2 ,
+.Xr system 3 ,
+.Xr named_attribute 7
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Fx 15.0 .
diff --git a/usr.bin/runat/runat.c.xattr b/usr.bin/runat/runat.c
--- a/usr.bin/runat/runat.c.xattr
+++ b/usr.bin/runat/runat.c
@@ -0,0 +1,115 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2025 Rick Macklem
+ *
+ * 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.
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/wait.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static void
+usage(void)
+{
+ (void)fprintf(stderr, "usage: runat [-create/-nocreate] <file> "
+ "<shell command>\n");
+ exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+ int fmode, i, nameddir_fd, outsiz, sysret;
+ char *buf;
+ long named_enabled;
+ size_t pos, siz;
+ pid_t child;
+
+ fmode = O_NAMEDATTR;
+ if (argc <= 2)
+ usage();
+ argv++;
+ argc--;
+ if (strcmp(argv[0], "-create") == 0) {
+ fmode |= O_CREAT;
+ argv++;
+ argc--;
+ } else if (strcmp(argv[0], "--") == 0) {
+ argv++;
+ argc--;
+ }
+ if (argc < 2)
+ usage();
+
+ named_enabled = pathconf(argv[0], _PC_NAMEDATTR_ENABLED);
+ if (named_enabled <= 0)
+ errx(1, "Named attributes not enabled for %s", argv[0]);
+
+ /* Generate the string for system(3). */
+ siz = 0;
+ for (i = 1; i < argc; i++)
+ siz += strlen(argv[i]) + 1;
+ buf = malloc(siz);
+ if (buf == NULL)
+ errx(1, "Cannot malloc");
+ pos = 0;
+ for (i = 1; i < argc; i++) {
+ outsiz = snprintf(&buf[pos], siz, "%s ", argv[i]);
+ if ((size_t)outsiz > siz)
+ errx(1, "Arguments too large");
+ pos += outsiz;
+ siz -= outsiz;
+ }
+ buf[pos - 1] = '\0';
+
+ nameddir_fd = open(argv[0], fmode, 0);
+ if (nameddir_fd < 0)
+ err(1, "Cannot open named attribute directory "
+ "for %s", argv[0]);
+
+ /* Fork a child that can chdir and do system. */
+ child = fork();
+ if (child == -1)
+ err(1, "Cannot fork");
+ if (child == 0) {
+ if (fchdir(nameddir_fd) < 0)
+ err(1, "Cannot fchdir to named "
+ "attribute dir");
+ close(nameddir_fd);
+ sysret = system(buf);
+ if (sysret == -1 || sysret == 127)
+ sysret = 1;
+ exit(sysret);
+ } else {
+ /* Wait for child to terminate. */
+ (void)waitpid(child, &sysret, 0);
+ exit(sysret);
+ }
+}

File Metadata

Mime Type
text/plain
Expires
Fri, Jan 23, 4:15 PM (4 h, 27 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
27887446
Default Alt Text
D49850.id153716.diff (6 KB)

Event Timeline