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-rw-r--r--utilities/smb4k_umount.cpp570
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diff --git a/utilities/smb4k_umount.cpp b/utilities/smb4k_umount.cpp
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+++ b/utilities/smb4k_umount.cpp
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+/***************************************************************************
+ smb4k_umount - This is the unmount utility of Smb4K.
+ -------------------
+ begin : Sa Sep 25 2004
+ copyright : (C) 2004-2007 by Alexander Reinholdt
+ email : dustpuppy@users.berlios.de
+ ***************************************************************************/
+
+/***************************************************************************
+ * This program 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, write to the *
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, *
+ * MA 02110-1301 USA *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#if !defined(__FreeBSD__) && !defined(__solaris__) && !defined(USE_SOLARIS)
+#include <sys/statfs.h>
+#elif defined(__solaris__) || defined(USE_SOLARIS)
+#include <sys/types.h>
+#include <sys/statvfs.h>
+#elif defined(__FreeBSD__)
+#include <sys/param.h>
+#include <sys/mount.h>
+#endif
+
+#ifdef __linux__
+#include <sys/utsname.h>
+#endif
+
+#include <locale.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <iostream>
+using namespace std;
+
+#define SMB4K_UMOUNT_VERSION "0.14"
+
+
+void info()
+{
+ cout << "This is smb4k_umount (version " << SMB4K_UMOUNT_VERSION << "), the unmount utility of Smb4K" << endl;
+ cout << "Copyright (C) 2004-2007, Alexander Reinholdt" << endl;
+ cout << endl;
+ cout << "Usage:" << endl;
+#ifndef __FreeBSD__
+ cout << " smb4k_umount {mode} {options} {mountpoint}" << endl;
+#else
+ cout << " smb4k_umount {mountpoint}" << endl;
+#endif
+ cout << " smb4k_umount --help" << endl;
+ cout << " smb4k_umount --version" << endl;
+ cout << endl;
+ cout << "Arguments:" << endl;
+ cout << " {mode}" << endl;
+#ifndef __FreeBSD__
+ cout << " --no-suid\tsmb4k_umount is run in normal user mode, so smbumount or" << endl;
+ cout << "\t\tumount.cifs is invoked." << endl;
+ cout << " --suid\tsmb4k_umount is run in super user mode, so umount is invoked." << endl;
+ cout << " -n\t\tThe same as the '--no-suid' argument." << endl;
+ cout << " -s\t\tThe same as the '--suid' argument." << endl;
+ cout << endl;
+ cout << " {options}" << endl;
+ cout << " -t <fs>\tThe file system that should be used for unmounting. Only 'smbfs'" << endl;
+ cout << "\t\tand 'cifs' are supported. All other file systems will result in" << endl;
+ cout << "\t\tan error. Please note, that this argument is mandatory." << endl;
+#endif
+#ifdef __linux__
+ cout << " -l\t\tPerform a lazy unmount. See the manual page of umount for" << endl;
+ cout << "\t\tmore information. Please note, that this argument is only" << endl;
+ cout << "\t\trecognized in super user mode, i.e. if '--suid' is supplied," << endl;
+ cout << "\t\tand that you need kernel version 2.4.11 or later." << endl;
+#endif
+ cout << endl;
+ cout << " {mountpoint}\tThe path where the share is mounted to." << endl;
+ cout << endl;
+ cout << " --help\tDisplay this help screen and exit." << endl;
+ cout << " --version\tDisplay the version information and exit." << endl;
+ cout << endl;
+}
+
+
+void version()
+{
+ cout << "Version " << SMB4K_UMOUNT_VERSION << endl;
+}
+
+
+bool find_program( const char *name, char *path )
+{
+ const char *paths[] = { "/bin/", "/sbin/", "/usr/bin/", "/usr/sbin/", "/usr/local/bin/", "/usr/local/sbin/" };
+ string file = "";
+
+ for ( uint i = 0; i < sizeof( paths ) / sizeof( char * ); i++ )
+ {
+ string p( paths[i] );
+ p.append( name );
+
+ if ( access( p.c_str(), X_OK ) == 0 )
+ {
+ file.assign( p );
+ break;
+ }
+ }
+
+ if ( !strcmp( file.c_str(), "" ) )
+ {
+ cerr << "smb4k_umount: Could not find " << name << " binary" << endl;
+
+ return false;
+ }
+
+ int len = strlen( file.c_str() ) + 1;
+ strncpy( path, file.c_str(), len );
+ path[len-1] = '\0';
+
+ return true;
+}
+
+
+bool check_filesystem( const char *path, const char *fs )
+{
+ bool ok = false;
+
+#if !defined(__solaris__) && !defined(USE_SOLARIS)
+ struct statfs filesystem;
+#else
+ struct statvfs filesystem;
+#endif
+
+#if !defined(__solaris__) && !defined(USE_SOLARIS) && !defined(__irix__)
+ if ( statfs( path, &filesystem ) == -1 )
+#elif defined(__irix__)
+ if ( statfs( path, &filesystem, sizeof( filesystem ), 0 ) == -1 )
+#else
+ if ( statvfs( path, &filesystem ) == -1 )
+#endif
+ {
+ int err_code = errno;
+
+ if ( err_code != EIO && err_code != EACCES )
+ {
+ // ok is still FALSE
+ cerr << "smb4k_umount: " << strerror( err_code ) << endl;
+ }
+ else
+ {
+ ok = true; // Bypass the check below, because it would yield ok == FALSE
+ // and we want to be able to unmount broken shares as well.
+ }
+
+ return ok;
+ }
+
+#if !defined(__FreeBSD__) && !defined(__solaris__) && !defined(USE_SOLARIS) && !defined(__irix__)
+ // First entry is for CIFS, the second for SMBFS.
+ if ( (uint)filesystem.f_type == 0xFF534D42 && !strncmp( fs, "cifs", strlen( fs )+1 ) )
+ {
+ ok = true;
+ }
+ else if ( (uint)filesystem.f_type == 0x517B && !strncmp( fs, "smbfs", strlen( fs )+1 ) )
+ {
+ ok = true;
+ }
+#elif defined(__FreeBSD__)
+ if ( !strncmp( filesystem.f_fstypename, fs, strlen( fs ) ) )
+ {
+ ok = true;
+ }
+#elif defined(__solaris__) || defined(USE_SOLARIS)
+ if ( (uint)filesystem.f_basetype == 0xFF534D42 && !strncmp( fs, "cifs", strlen( fs )+1 ) )
+ {
+ ok = true;
+ }
+ else if ( (uint)filesystem.f_basetype == 0x517B && !strncmp( fs, "smbfs", strlen( fs )+1 ) )
+ {
+ ok = true;
+ }
+#elif defined(__irix__)
+ if ( (uint)filesystem.f_fstyp == 0xFF534D42 && !strncmp( fs, "cifs", strlen( fs )+1 ) )
+ {
+ ok = true;
+ }
+ else if ( (uint)filesystem.f_basetype == 0x517B && !strncmp( fs, "smbfs", strlen( fs )+1 ) )
+ {
+ ok = true;
+ }
+#endif
+ else
+ {
+ // ok is still FALSE.
+ cerr << "smb4k_umount: Wrong file system specified" << endl;
+ }
+
+ return ok;
+}
+
+
+int main( int argc, char *argv[], char *envp[] )
+{
+ // First of all, set the locale
+ (void) setlocale( LC_ALL, "" );
+
+ if ( argc < 2 )
+ {
+ info();
+ exit( EXIT_FAILURE );
+ }
+
+ int new_argc = argc + 1;
+ char *new_argv[new_argc];
+ int index = 0;
+ char path[255];
+ path[0] = '\0';
+ char *mountpoint = NULL;
+#ifndef __FreeBSD__
+ char *filesystem = NULL;
+ bool normal_user_mode = true;
+ bool have_user_mode = false;
+#ifdef __linux__
+ bool lazy_unmount = false;
+#endif
+#endif
+
+ // Get the options that were passed:
+ int c;
+
+ while ( 1 )
+ {
+ int option_index = 0;
+
+ static struct option long_options[] =
+ {
+ { "help", 0, 0, 0 },
+ { "version", 0, 0, 0 },
+#ifndef __FreeBSD__
+ { "suid", 0, 0, 0 },
+ { "no-suid", 0, 0, 0 },
+#endif
+ { 0, 0, 0, 0 }
+ };
+#ifdef __linux__
+ c = getopt_long( argc, argv, "t:nsl", long_options, &option_index );
+#else
+#ifndef __FreeBSD__
+ c = getopt_long( argc, argv, "t:ns", long_options, &option_index );
+#else
+ c = getopt_long( argc, argv, "", long_options, &option_index );
+#endif
+#endif
+
+ if ( c == -1 )
+ {
+ break;
+ }
+
+ switch ( c )
+ {
+ case 0:
+ {
+ int len = strlen( long_options[option_index].name ) + 1;
+ char opt[len];
+ opt[0] = '\0';
+ (void) strncpy( opt, long_options[option_index].name, len );
+ opt[len-1] = '\0';
+
+ if ( !strncmp( opt, "help", len ) )
+ {
+ info();
+
+ exit( EXIT_SUCCESS );
+ }
+ else if ( !strncmp( opt, "version", len ) )
+ {
+ version();
+
+ exit( EXIT_SUCCESS );
+ }
+#ifndef __FreeBSD__
+ else if ( !strncmp( opt, "suid", len ) )
+ {
+ // Enter super user mode
+
+ normal_user_mode = false;
+ have_user_mode = true;
+
+ break;
+ }
+ else if ( !strncmp( opt, "no-suid", len ) )
+ {
+ // Enter normal user mode
+
+ normal_user_mode = true;
+ have_user_mode = true;
+
+ break;
+ }
+#endif
+ else
+ {
+ break;
+ }
+
+ break;
+ }
+#ifndef __FreeBSD__
+ case 't':
+ {
+ // Get the length of the option argument:
+ int len = strlen( optarg ) + 1;
+
+ if ( strncmp( "smbfs", optarg, len) != 0 &&
+ strncmp( "cifs", optarg, len ) != 0 )
+ {
+ cerr << "smb4k_umount: File system " << optarg << " is not supported" << endl;
+ exit( EXIT_FAILURE );
+ }
+
+ if ( !filesystem )
+ {
+ filesystem = new char[len];
+ filesystem[0] = '\0';
+ (void) strncpy( filesystem, optarg, len );
+ filesystem[len-1] = '\0';
+ }
+
+ break;
+ }
+ case 's':
+ {
+ // Enter super user mode
+ normal_user_mode = false;
+ have_user_mode = true;
+
+ break;
+ }
+ case 'n':
+ {
+ // Enter normal user mode
+ normal_user_mode = true;
+ have_user_mode = true;
+
+ break;
+ }
+#endif
+#ifdef __linux__
+ case 'l':
+ {
+ // Initiate a lazy unmount. The umount binary
+ // will complain, if '-l' is not supported.
+ lazy_unmount = true;
+
+ break;
+ }
+#endif
+ case '?':
+ {
+ // Abort the program if an unknown option
+ // is encountered:
+ exit( EXIT_FAILURE );
+ }
+ default:
+ {
+ break;
+ }
+ };
+ }
+
+#ifndef __FreeBSD__
+ // Error out if no user mode was specified.
+ if ( !have_user_mode )
+ {
+ cerr << "smb4k_umount: No mode was specified" << endl;
+ exit( EXIT_FAILURE );
+ }
+
+ // Error out if the user did not specify any file system.
+ if ( !filesystem )
+ {
+ cerr << "smb4k_umount: No file system was specified" << endl;
+ exit( EXIT_FAILURE );
+ }
+
+ if ( normal_user_mode )
+ {
+ int len = strlen( filesystem ) + 1;
+
+ if ( !strncmp( "smbfs", filesystem, len ) )
+ {
+ if ( !find_program( "smbumount", path ) )
+ {
+ exit( EXIT_FAILURE );
+ }
+ }
+ else
+ {
+ if ( !find_program( "umount.cifs", path ) )
+ {
+ exit( EXIT_FAILURE );
+ }
+ }
+
+ len = strlen( path ) + 1;
+
+ new_argv[index] = new char[len];
+ new_argv[index][0] = '\0';
+ (void) strncpy( new_argv[index], path, len );
+ new_argv[index][len-1] = '\0';
+
+ index++;
+ }
+ else
+ {
+ if ( !find_program( "umount", path ) )
+ {
+ exit( EXIT_FAILURE );
+ }
+
+ int len = strlen( path ) + 1;
+
+ new_argv[index] = new char[len];
+ new_argv[index][0] = '\0';
+ (void) strncpy( new_argv[index], path, len );
+ new_argv[index][len-1] = '\0';
+
+ index++;
+
+ len = strlen( "-t" ) + 1;
+
+ new_argv[index] = new char[len];
+ new_argv[index][0] = '\0';
+ (void) strncpy( new_argv[index], "-t", len );
+ new_argv[index][len-1] = '\0';
+
+ index++;
+
+ len = strlen( filesystem ) + 1;
+
+ new_argv[index] = new char[len];
+ new_argv[index][0] = '\0';
+ (void) strncpy( new_argv[index], filesystem, len );
+ new_argv[index][len-1] = '\0';
+
+ index++;
+
+#ifdef __linux__
+ // Lazy unmount?
+ if ( lazy_unmount )
+ {
+ len = strlen( "-l" ) + 1;
+
+ new_argv[index] = new char[len];
+ new_argv[index][0] = '\0';
+ (void) strncpy( new_argv[index], "-l", len );
+ new_argv[index][len-1] = '\0';
+
+ index++;
+ }
+#endif
+ }
+#else
+ // We do not need to care about the user mode and
+ // we also need not to check for the file system,
+ // since there is only one.
+ if ( !find_program( "umount", path ) )
+ {
+ exit( EXIT_FAILURE );
+ }
+
+ int length = strlen( path ) + 1;
+ new_argv[index] = new char[length];
+ new_argv[index][0] = '\0';
+ (void) strncpy( new_argv[index], path, length );
+ new_argv[index][length-1] = '\0';
+
+ index++;
+#endif
+
+ // Add the mount point:
+ if ( optind < argc )
+ {
+ while ( optind < argc )
+ {
+ if ( !mountpoint )
+ {
+ if ( argv[optind][0] != '\057' )
+ {
+ cerr << "smb4k_umount: Argument " << optind << " is not a mount point" << endl;
+ exit( EXIT_FAILURE );
+ }
+#ifndef __FreeBSD__
+ if ( !check_filesystem( argv[optind], filesystem ) )
+#else
+ if ( !check_filesystem( argv[optind], "smbfs" ) )
+#endif
+ {
+ // Error message is given by check_filesystem()
+ exit( EXIT_FAILURE );
+ }
+
+ int len = strlen( argv[optind] ) + 1;
+
+ mountpoint = new char[len];
+ mountpoint[0] = '\0';
+ (void) strncpy( mountpoint, argv[optind], len );
+ mountpoint[len-1] = '\0';
+
+ optind++;
+ }
+ else
+ {
+ break;
+ }
+ }
+ }
+
+ if ( !mountpoint )
+ {
+ cerr << "smb4k_umount: No mount point was specified" << endl;
+ exit( EXIT_FAILURE );
+ }
+ else
+ {
+ int len = strlen( mountpoint ) + 1;
+ new_argv[index] = new char[len];
+ new_argv[index][0] = '\0';
+ (void) strncpy( new_argv[index], mountpoint, len );
+ new_argv[index][len-1] = '\0';
+
+ index++;
+ }
+
+
+ if ( index >= new_argc )
+ {
+ cerr << "smb4k_umount: There are too many arguments" << endl;
+ exit( EXIT_FAILURE );
+ }
+
+ // Terminate new_argv:
+ new_argv[index] = NULL;
+
+ // Execute command:
+ if ( execve( new_argv[0], new_argv, envp ) == -1 )
+ {
+ int err = errno;
+ cerr << "smb4k_umount: " << strerror( err ) << endl;
+
+ exit( EXIT_FAILURE );
+ }
+
+ return EXIT_SUCCESS;
+}
+
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