v.0.2 first commit

Author: rd235

COPYING

@@ -0,0 +1,60 @@
+bin_PROGRAMS = nshold nslist nsrelease netnsjoin
+
+nshold_SOURCES = nshold.c catargv.c prefix.c
+
+nshold_LDADD = -lbsd -lcap
+
+nslist_SOURCES = nslist.c catargv.c memogetusername.c prefix.c printflen.c
+
+nsrelease_SOURCES = nsrelease.c nssearch.c catargv.c prefix.c
+
+netnsjoin_SOURCES = netnsjoin.c nssearch.c catargv.c prefix.c
+
+netnsjoin_LDADD = -lcap
+
+man_MANS = netnsjoin.1 nshold.1 nslist.1 nsrelease.1
+ 
+install-exec-hook:
+	ln -sf nshold $(DESTDIR)$(bindir)/cgroupnshold
+	ln -sf nslist $(DESTDIR)$(bindir)/cgroupnslist
+	ln -sf nsrelease $(DESTDIR)$(bindir)/cgroupnsrelease
+	ln -sf nshold $(DESTDIR)$(bindir)/ipcnshold
+	ln -sf nslist $(DESTDIR)$(bindir)/ipcnslist
+	ln -sf nsrelease $(DESTDIR)$(bindir)/ipcnsrelease
+	ln -sf nshold $(DESTDIR)$(bindir)/mntnshold
+	ln -sf nslist $(DESTDIR)$(bindir)/mntnslist
+	ln -sf nsrelease $(DESTDIR)$(bindir)/mntnsrelease
+	ln -sf nshold $(DESTDIR)$(bindir)/netnshold
+	ln -sf nslist $(DESTDIR)$(bindir)/netnslist
+	ln -sf nsrelease $(DESTDIR)$(bindir)/netnsrelease
+	ln -sf nshold $(DESTDIR)$(bindir)/pidnshold
+	ln -sf nslist $(DESTDIR)$(bindir)/pidnslist
+	ln -sf nsrelease $(DESTDIR)$(bindir)/pidnsrelease
+	ln -sf nshold $(DESTDIR)$(bindir)/usernshold
+	ln -sf nslist $(DESTDIR)$(bindir)/usernslist
+	ln -sf nsrelease $(DESTDIR)$(bindir)/usernsrelease
+	ln -sf nshold $(DESTDIR)$(bindir)/utsnshold
+	ln -sf nslist $(DESTDIR)$(bindir)/utsnslist
+	ln -sf nsrelease $(DESTDIR)$(bindir)/utsnsrelease
+	setcap cap_sys_ptrace,cap_sys_admin+p $(DESTDIR)$(bindir)/netnsjoin
+	ln -sf nshold.1 $(DESTDIR)$(man1dir)/cgroupnshold.1
+	ln -sf nslist.1 $(DESTDIR)$(man1dir)/cgroupnslist.1
+	ln -sf nsrelease.1 $(DESTDIR)$(man1dir)/cgroupnsrelease.1
+	ln -sf nshold.1 $(DESTDIR)$(man1dir)/ipcnshold.1
+	ln -sf nslist.1 $(DESTDIR)$(man1dir)/ipcnslist.1
+	ln -sf nsrelease.1 $(DESTDIR)$(man1dir)/ipcnsrelease.1
+	ln -sf nshold.1 $(DESTDIR)$(man1dir)/mntnshold.1
+	ln -sf nslist.1 $(DESTDIR)$(man1dir)/mntnslist.1
+	ln -sf nsrelease.1 $(DESTDIR)$(man1dir)/mntnsrelease.1
+	ln -sf nshold.1 $(DESTDIR)$(man1dir)/netnshold.1
+	ln -sf nslist.1 $(DESTDIR)$(man1dir)/netnslist.1
+	ln -sf nsrelease.1 $(DESTDIR)$(man1dir)/netnsrelease.1
+	ln -sf nshold.1 $(DESTDIR)$(man1dir)/pidnshold.1
+	ln -sf nslist.1 $(DESTDIR)$(man1dir)/pidnslist.1
+	ln -sf nsrelease.1 $(DESTDIR)$(man1dir)/pidnsrelease.1
+	ln -sf nshold.1 $(DESTDIR)$(man1dir)/usernshold.1
+	ln -sf nslist.1 $(DESTDIR)$(man1dir)/usernslist.1
+	ln -sf nsrelease.1 $(DESTDIR)$(man1dir)/usernsrelease.1
+	ln -sf nshold.1 $(DESTDIR)$(man1dir)/utsnshold.1
+	ln -sf nslist.1 $(DESTDIR)$(man1dir)/utsnslist.1
+	ln -sf nsrelease.1 $(DESTDIR)$(man1dir)/utsnsrelease.1

Makefile.am

@@ -1 +1,14 @@
-# nsutils
+#NSUTILS: Linux namespace utilities
+
+Nsutils include a number of utilities to list, add/remove tag, and join namespaces.
+
+INSTALL:
+
+get the source code, from the root of the source tree run:
+```
+$ autoreconf -if
+$ ./configure
+$ make
+$ sudo make install
+
+

README.md

@@ -0,0 +1,37 @@
+/* 
+ * nsutils: namespace utilities
+ * Copyright (C) 2016  Renzo Davoli, University of Bologna
+ * 
+ * catargv: create a malloc-ed copy of all the argv arguments as a string
+ *
+ * Cado is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; If not, see <http://www.gnu.org/licenses/>. 
+ *
+ */
+
+#include <stdio.h>
+
+/* join all the args in a single string */
+char *catargv(char *argv[]) {
+	char *out = NULL;
+	size_t len = 0;
+	FILE *fout = open_memstream(&out, &len);
+	if (fout) {
+		while (*argv) {
+			fprintf(fout, "%s",*argv++);
+			if (*argv) fprintf(fout," ");
+		}
+		fclose(fout);
+	}
+	return out;
+}

catargv.c

@@ -0,0 +1,7 @@
+#ifndef CATARGV_H
+#define CATARGV_H
+#include <stdio.h>
+
+char *catargv(char *argv[]);
+
+#endif //CATARGV_H

catargv.h

@@ -0,0 +1,101 @@
+/* config.h.  Generated from config.h.in by configure.  */
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if you have the <fcntl.h> header file. */
+#define HAVE_FCNTL_H 1
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#define HAVE_INTTYPES_H 1
+
+/* Define to 1 if you have the <memory.h> header file. */
+#define HAVE_MEMORY_H 1
+
+/* Define to 1 if you have the <regex.h> header file. */
+#define HAVE_REGEX_H 1
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#define HAVE_STDINT_H 1
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#define HAVE_STDLIB_H 1
+
+/* Define to 1 if you have the `strdup' function. */
+#define HAVE_STRDUP 1
+
+/* Define to 1 if you have the <strings.h> header file. */
+#define HAVE_STRINGS_H 1
+
+/* Define to 1 if you have the <string.h> header file. */
+#define HAVE_STRING_H 1
+
+/* Define to 1 if you have the `strtoull' function. */
+#define HAVE_STRTOULL 1
+
+/* Define to 1 if you have the <sys/capability.h> header file. */
+#define HAVE_SYS_CAPABILITY_H 1
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#define HAVE_SYS_STAT_H 1
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#define HAVE_SYS_TYPES_H 1
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#define HAVE_UNISTD_H 1
+
+/* Name of package */
+#define PACKAGE "nsutils"
+
+/* Define to the address where bug reports for this package should be sent. */
+#define PACKAGE_BUGREPORT "[email protected]"
+
+/* Define to the full name of this package. */
+#define PACKAGE_NAME "nsutils"
+
+/* Define to the full name and version of this package. */
+#define PACKAGE_STRING "nsutils 0.2"
+
+/* Define to the one symbol short name of this package. */
+#define PACKAGE_TARNAME "nsutils"
+
+/* Define to the home page for this package. */
+#define PACKAGE_URL ""
+
+/* Define to the version of this package. */
+#define PACKAGE_VERSION "0.2"
+
+/* Define to 1 if you have the ANSI C header files. */
+#define STDC_HEADERS 1
+
+/* Version number of package */
+#define VERSION "0.2"
+
+/* Define for Solaris 2.5.1 so the uint32_t typedef from <sys/synch.h>,
+   <pthread.h>, or <semaphore.h> is not used. If the typedef were allowed, the
+   #define below would cause a syntax error. */
+/* #undef _UINT32_T */
+
+/* Define for Solaris 2.5.1 so the uint64_t typedef from <sys/synch.h>,
+   <pthread.h>, or <semaphore.h> is not used. If the typedef were allowed, the
+   #define below would cause a syntax error. */
+/* #undef _UINT64_T */
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+/* #undef gid_t */
+
+/* Define to `int' if <sys/types.h> does not define. */
+/* #undef pid_t */
+
+/* Define to `int' if <sys/types.h> does not define. */
+/* #undef ssize_t */
+
+/* Define to `int' if <sys/types.h> doesn't define. */
+/* #undef uid_t */
+
+/* Define to the type of an unsigned integer type of width exactly 32 bits if
+   such a type exists and the standard includes do not define it. */
+/* #undef uint32_t */
+
+/* Define to the type of an unsigned integer type of width exactly 64 bits if
+   such a type exists and the standard includes do not define it. */
+/* #undef uint64_t */

config.h

@@ -0,0 +1,33 @@
+utoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.69])
+AC_INIT([nsutils], [0.2], [[email protected]])
+AM_INIT_AUTOMAKE([foreign dist-bzip2])
+AC_CONFIG_SRCDIR([nssearch.h])
+AC_CONFIG_HEADERS([config.h])
+CFLAGS="$CFLAGS -Wall"
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_INSTALL
+
+# Checks for libraries.
+
+# Checks for header files.
+AC_CHECK_HEADERS([fcntl.h stdint.h stdlib.h string.h unistd.h regex.h])
+AC_CHECK_HEADERS([sys/capability.h],
+		[],
+		[AC_MSG_ERROR([missing libcap header])])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_TYPE_UID_T
+AC_TYPE_PID_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+
+# Checks for library functions.
+AC_CHECK_FUNCS([strdup strtoull])
+
+AC_OUTPUT([Makefile])

configure.ac

@@ -0,0 +1,73 @@
+/* 
+ * nsutils: namespace utilities
+ * Copyright (C) 2016  Renzo Davoli, University of Bologna
+ * 
+ * memogetpwuid: memoize version of getpwuid
+ *
+ * Cado is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; If not, see <http://www.gnu.org/licenses/>. 
+ *
+ */
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pwd.h>
+#include <sys/types.h>
+
+struct memopw {
+	uid_t   pw_uid;        /* user ID */
+	char   *pw_name;       /* username */
+	struct memopw *next;
+};
+
+static struct memopw *memohead;
+
+static char *memogetpw(struct memopw **scan, uid_t pw_uid) {
+	while (*scan != NULL && (*scan)->pw_uid < pw_uid)
+		scan = &((*scan)->next);	
+	if (*scan != NULL  && (*scan)->pw_uid == pw_uid)
+		return (*scan)->pw_name;
+	else {
+		struct passwd *pwd = getpwuid(pw_uid);
+		struct memopw *new = malloc(sizeof(struct memopw));
+		if (new) {
+			new->pw_uid = pw_uid;
+			if (pwd)
+				new->pw_name = strdup(pwd->pw_name);
+			else
+				asprintf(&new->pw_name,"%d",pw_uid);
+			new->next = *scan;
+			*scan = new;
+			return new->pw_name;
+		} else
+			return pwd ? pwd->pw_name : "";
+	}
+}
+
+/* return the username from the uid. Memoize the results */
+char *memogetusername(uid_t pw_uid) {
+	return memogetpw(&memohead, pw_uid);
+}
+
+#if 0
+#include <stdio.h>
+int main(int argc, char *argv[]) {
+	while (1) {
+		uid_t uid;
+		scanf("%d", &uid);
+		printf("%d %s\n",uid,memogetusername(uid));
+	}
+}
+#endif

memogetusername.c

@@ -0,0 +1,8 @@
+#ifndef MEMOGETPWUID_C
+#define MEMOGETPWUID_C
+#define _GNU_SOURCE
+#include <pwd.h>
+
+char *memogetusername(uid_t pw_uid); 
+
+#endif // MEMOGETPWUID_C

memogetusername.h

@@ -0,0 +1,34 @@
+.TH NETNSJOIN 1 "August 14, 2016" "VirtualSquare Labs"
+.SH NAME
+netnsjoin \- Join the net namespace of another process
+.SH SYNOPSIS
+
+.B cado
+.I pid_or_net_namespace_id_or_placeholder_tag
+.I command
+[
+.I args
+]
+
+.B cado
+.I long placeholder tag
+.R --
+.I command
+[
+.I args
+]
+
+.SH DESCRIPTION
+\fBnetnsjoin\fR joins the net namespace of another process.
+
+The namespace to join can be identified by the pid of a process belonging to
+that namespace, by the namespace id (e.g. net:[1234567890]) or using a tag defined by \fBnetnshold(1)\fR
+
+Root access or CAP_NET_ADMIN is required to run the program. CAP_NET_ADMIN can be delegated to
+specific users by \fBcado(1)\fR (if installed).
+
+.SH SEE ALSO
+\fBnetnshold\fR(1)
+\fBnetnslist\fR(1)
+\fBnetnsrelease\fR(1)
+\fBcado\fR(1)