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Wanderlei Hüttel 2023-11-06 19:38:13 -03:00
parent e28af92dd0
commit 694d5ab55e
5 changed files with 1065 additions and 1065 deletions
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156
doc/vchanger-example.conf
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@ -1,78 +1,78 @@
# Example vchanger 1.0.2 config file
#
# Storage Resource Name of the Storage resource defined in bacula-dir.conf
# that is associated with this changer.
# [Default: 'vchanger' ]
#Storage Resource = "vchanger"
#
# User User to run as when invoked by root. This must be the
# owner of the volume files controlled by this changer, and
# so will need to be the same user that bacula-sd runs as.
# [Default: bacula ]
#User = bacula
#
# Group Group to run as when invoked by root. This should be the
# owner group of the volume files controlled by this changer,
# and should also be the default group of the user that
# bacula-sd runs as.
# [Default: tape ]
#group = tape
#
# Work Dir Directory where virtual drive and magazine state information
# and symlinks for this changer are stored.
# [Default: /var/spool/vchanger/{StorageResource} ]
#work dir = "/var/spool/vchanger/vcahnger"
#
# Logfile Path to log file for this changer.
# [Default: {WorkDir}/{StorageResource}.log ]
#logfile = "/var/spool/vchanger/vchanger.log"
#
# Log Level Sets the level of detail being logged. An integer value from
# 0-7 is expected, where 7 logs the most detail. The levels
# correspond to LOG_EMERG - LOG_DEBUG. (See man 3 syslog)
# [Default: 3 (LOG_ERR) ]
#log_level = 3
#
# bconsole Sets the path to the bconsole binary that vchanger will run
# in order to send 'update slots' and 'label barcodes' commands
# to Bacula. To disable sending commands to Bacula, set
# bconsole="".
# [Default: "/usr/sbin/bconsole" ]
#bconsole = "/usr/sbin/bconsole"
#
# bconsole config Path to the config file bconsole will use when vchanger
# invokes bconsole. By default, bconsole will be invoked
# without the -c flag. The file must be readable by the user
# vchanger is run as.
# [Default: none ]
#bconsole config = /etc/bacula/bconsole.conf
#
# Default Pool Name of the pool that new volumes created by vcahnger
# should be placed into when using bconsole to send a
# 'label barcodes' command.
# [Default: "Scratch" ]
#default pool = "Scratch"
#
# Magazine [Required] Gives the list of magazines known to this changer.
# One or more magazine directives must be specified. A magazine
# may be specified as either a directory path or as the UUID
# of a filesystem partition. A magazine is specified by UUID
# by prefixing the string "UUID:" to the filesystem's UUID.
# For magazines specified by UUID, the mountpoint of the
# filesystem will be queried from the system. Note that vchanger
# does not attempt to mount the magazines that are specified
# by filesystem UUID. Vchanger utilizes all magazines that are
# already mounted at the time it is invoked.
# [Default: none ]
#magazine = "uuid:4fcb1422-f15c-4d7a-8a32-a4dcc0af5e00"
#Magazine = "/mnt/backup2"
# Example vchanger 1.0.2 config file
#
# Storage Resource Name of the Storage resource defined in bacula-dir.conf
# that is associated with this changer.
# [Default: 'vchanger' ]
#Storage Resource = "vchanger"
#
# User User to run as when invoked by root. This must be the
# owner of the volume files controlled by this changer, and
# so will need to be the same user that bacula-sd runs as.
# [Default: bacula ]
#User = bacula
#
# Group Group to run as when invoked by root. This should be the
# owner group of the volume files controlled by this changer,
# and should also be the default group of the user that
# bacula-sd runs as.
# [Default: tape ]
#group = tape
#
# Work Dir Directory where virtual drive and magazine state information
# and symlinks for this changer are stored.
# [Default: /var/spool/vchanger/{StorageResource} ]
#work dir = "/var/spool/vchanger/vcahnger"
#
# Logfile Path to log file for this changer.
# [Default: {WorkDir}/{StorageResource}.log ]
#logfile = "/var/spool/vchanger/vchanger.log"
#
# Log Level Sets the level of detail being logged. An integer value from
# 0-7 is expected, where 7 logs the most detail. The levels
# correspond to LOG_EMERG - LOG_DEBUG. (See man 3 syslog)
# [Default: 3 (LOG_ERR) ]
#log_level = 3
#
# bconsole Sets the path to the bconsole binary that vchanger will run
# in order to send 'update slots' and 'label barcodes' commands
# to Bacula. To disable sending commands to Bacula, set
# bconsole="".
# [Default: "/usr/sbin/bconsole" ]
#bconsole = "/usr/sbin/bconsole"
#
# bconsole config Path to the config file bconsole will use when vchanger
# invokes bconsole. By default, bconsole will be invoked
# without the -c flag. The file must be readable by the user
# vchanger is run as.
# [Default: none ]
#bconsole config = /etc/bacula/bconsole.conf
#
# Default Pool Name of the pool that new volumes created by vcahnger
# should be placed into when using bconsole to send a
# 'label barcodes' command.
# [Default: "Scratch" ]
#default pool = "Scratch"
#
# Magazine [Required] Gives the list of magazines known to this changer.
# One or more magazine directives must be specified. A magazine
# may be specified as either a directory path or as the UUID
# of a filesystem partition. A magazine is specified by UUID
# by prefixing the string "UUID:" to the filesystem's UUID.
# For magazines specified by UUID, the mountpoint of the
# filesystem will be queried from the system. Note that vchanger
# does not attempt to mount the magazines that are specified
# by filesystem UUID. Vchanger utilizes all magazines that are
# already mounted at the time it is invoked.
# [Default: none ]
#magazine = "uuid:4fcb1422-f15c-4d7a-8a32-a4dcc0af5e00"
#Magazine = "/mnt/backup2"

48
src/targetver.h
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@ -1,24 +1,24 @@
/* The following macros define the minimum required platform. The minimum required platform
* is the earliest version of Windows, Internet Explorer etc. that has the necessary features to run
* your application. The macros work by enabling all features available on platform versions up to and
* including the version specified.
*
* Modify the following defines if you have to target a platform prior to the ones specified below.
* Refer to MSDN for the latest info on corresponding values for different platforms.
*/
#ifndef _TARGETVER_H_
#define _TARGETVER_H_ 1
#ifdef HAVE_WINDOWS_H
#ifndef WINVER
#define WINVER 0x0600
#endif
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0600
#endif
#ifndef _WIN32_IE
#define _WIN32_IE 0x0700
#endif
#define _POSIX 1
#endif
#endif
/* The following macros define the minimum required platform. The minimum required platform
* is the earliest version of Windows, Internet Explorer etc. that has the necessary features to run
* your application. The macros work by enabling all features available on platform versions up to and
* including the version specified.
*
* Modify the following defines if you have to target a platform prior to the ones specified below.
* Refer to MSDN for the latest info on corresponding values for different platforms.
*/
#ifndef _TARGETVER_H_
#define _TARGETVER_H_ 1
#ifdef HAVE_WINDOWS_H
#ifndef WINVER
#define WINVER 0x0600
#endif
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0600
#endif
#ifndef _WIN32_IE
#define _WIN32_IE 0x0700
#endif
#define _POSIX 1
#endif
#endif

384
src/util.cpp
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@ -1,192 +1,192 @@
/* util.cpp
*
* This file is part of vchanger by Josh Fisher.
*
* vchanger copyright (C) 2008-2014 Josh Fisher
*
* vchanger is free software.
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License version 2, as published by the Free
* Software Foundation.
*
* vchanger 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 vchanger. See the file "COPYING". If not,
* write to: The Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* This file simply provides some utility functions
*/
#include "config.h"
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDARG_H
#include <stdarg.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include "util.h"
/*-------------------------------------------------
* Function to return elapsed time between two struct timeval values
* in microseconds.
*------------------------------------------------*/
long timeval_et(struct timeval *tv1, struct timeval *tv2)
{
if (!tv1 || !tv2) return 0;
return ((tv2->tv_sec - tv1->tv_sec) * 1000000) + tv2->tv_usec - tv1->tv_usec;
}
/*-------------------------------------------------
* Function to open file 'fname' for write in exclusive access mode.
* On success, returns the opened stream. Otherwise, on error returns
* NULL.
*------------------------------------------------*/
int exclusive_fopen(const char *fname, FILE **fs)
{
int fd, result = 0;
*fs = NULL;
fd = open(fname, O_CREAT | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR);
if (fd > 0) {
*fs = fdopen(fd, "w");
if (*fs == NULL) {
result = errno;
close(fd);
unlink(fname);
}
} else {
result = errno;
}
return result;
}
/*-------------------------------------------------
* Function to copy file 'from_path' to new file 'to_path'.
* On success returns zero, else returns errno
*------------------------------------------------*/
int file_copy(const char *to_path, const char *from_path)
{
int rc;
size_t n;
FILE *to, *from;
char *buf;
size_t buf_sz = 1024 * 1024;
if (access(to_path, F_OK) == 0) return EEXIST;
from = fopen(from_path, "r");
if (!from) return errno;
to = fopen(to_path, "w");
if (!to) {
rc = errno;
fclose(from);
return rc;
}
buf = (char*)malloc(buf_sz);
while ((n = fread(buf, 1, buf_sz, from)) > 0) {
if (fwrite(buf, 1 , n, to) != n) {
rc = ferror(to);
fclose(to);
unlink(to_path);
fclose(from);
free(buf);
return rc;
}
}
free(buf);
fclose(to);
if (!feof(from)) {
rc = ferror(from);
unlink(to_path);
fclose(from);
return rc;
}
fclose(from);
return 0;
}
/*-------------------------------------------------
* Function to drop root privileges and change persona to uid:gid
* of the given user name and group name.
* On success returns zero, else on error returns errno.
*------------------------------------------------*/
int drop_privs(const char *uname, const char *gname)
{
#ifdef HAVE_WINDOWS_H
return 0; /* For windows ignore user switching */
#else
gid_t new_gid;
struct passwd *pw;
struct group *gr;
if (!uname || !uname[0] || getuid()) return 0; /* Nothing to do */
if ((pw = getpwnam(uname)) == NULL) return errno;
if (pw->pw_uid == 0) return 0; /* already running as root */
new_gid = pw->pw_gid;
if (gname && gname[0]) {
/* find given group */
if ((gr = getgrnam(gname)) == NULL) return errno; /* no such group */
new_gid = gr->gr_gid;
}
/* Set supplemental groups */
if (initgroups(uname, new_gid)) return errno;
/* Start running as given group */
if (setgid(new_gid)) return errno;
/* Drop root and run as given user */
if (setuid(pw->pw_uid)) return errno;
return 0;
#endif
}
/*-------------------------------------------------
* Function returns zero if current user not superuser
* else non-zero.
*------------------------------------------------*/
int is_root_user()
{
#ifndef HAVE_WINDOWS_H
return getuid() == 0 ? 1 : 0;
#endif
return 0;
}
/* util.cpp
*
* This file is part of vchanger by Josh Fisher.
*
* vchanger copyright (C) 2008-2014 Josh Fisher
*
* vchanger is free software.
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License version 2, as published by the Free
* Software Foundation.
*
* vchanger 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 vchanger. See the file "COPYING". If not,
* write to: The Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* This file simply provides some utility functions
*/
#include "config.h"
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDARG_H
#include <stdarg.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include "util.h"
/*-------------------------------------------------
* Function to return elapsed time between two struct timeval values
* in microseconds.
*------------------------------------------------*/
long timeval_et(struct timeval *tv1, struct timeval *tv2)
{
if (!tv1 || !tv2) return 0;
return ((tv2->tv_sec - tv1->tv_sec) * 1000000) + tv2->tv_usec - tv1->tv_usec;
}
/*-------------------------------------------------
* Function to open file 'fname' for write in exclusive access mode.
* On success, returns the opened stream. Otherwise, on error returns
* NULL.
*------------------------------------------------*/
int exclusive_fopen(const char *fname, FILE **fs)
{
int fd, result = 0;
*fs = NULL;
fd = open(fname, O_CREAT | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR);
if (fd > 0) {
*fs = fdopen(fd, "w");
if (*fs == NULL) {
result = errno;
close(fd);
unlink(fname);
}
} else {
result = errno;
}
return result;
}
/*-------------------------------------------------
* Function to copy file 'from_path' to new file 'to_path'.
* On success returns zero, else returns errno
*------------------------------------------------*/
int file_copy(const char *to_path, const char *from_path)
{
int rc;
size_t n;
FILE *to, *from;
char *buf;
size_t buf_sz = 1024 * 1024;
if (access(to_path, F_OK) == 0) return EEXIST;
from = fopen(from_path, "r");
if (!from) return errno;
to = fopen(to_path, "w");
if (!to) {
rc = errno;
fclose(from);
return rc;
}
buf = (char*)malloc(buf_sz);
while ((n = fread(buf, 1, buf_sz, from)) > 0) {
if (fwrite(buf, 1 , n, to) != n) {
rc = ferror(to);
fclose(to);
unlink(to_path);
fclose(from);
free(buf);
return rc;
}
}
free(buf);
fclose(to);
if (!feof(from)) {
rc = ferror(from);
unlink(to_path);
fclose(from);
return rc;
}
fclose(from);
return 0;
}
/*-------------------------------------------------
* Function to drop root privileges and change persona to uid:gid
* of the given user name and group name.
* On success returns zero, else on error returns errno.
*------------------------------------------------*/
int drop_privs(const char *uname, const char *gname)
{
#ifdef HAVE_WINDOWS_H
return 0; /* For windows ignore user switching */
#else
gid_t new_gid;
struct passwd *pw;
struct group *gr;
if (!uname || !uname[0] || getuid()) return 0; /* Nothing to do */
if ((pw = getpwnam(uname)) == NULL) return errno;
if (pw->pw_uid == 0) return 0; /* already running as root */
new_gid = pw->pw_gid;
if (gname && gname[0]) {
/* find given group */
if ((gr = getgrnam(gname)) == NULL) return errno; /* no such group */
new_gid = gr->gr_gid;
}
/* Set supplemental groups */
if (initgroups(uname, new_gid)) return errno;
/* Start running as given group */
if (setgid(new_gid)) return errno;
/* Drop root and run as given user */
if (setuid(pw->pw_uid)) return errno;
return 0;
#endif
}
/*-------------------------------------------------
* Function returns zero if current user not superuser
* else non-zero.
*------------------------------------------------*/
int is_root_user()
{
#ifndef HAVE_WINDOWS_H
return getuid() == 0 ? 1 : 0;
#endif
return 0;
}

74
src/uuidlookup.h
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@ -1,37 +1,37 @@
/* uuidlookup.h
*
* This file is part of vchanger by Josh Fisher.
*
* vchanger copyright (C) 2008-2013 Josh Fisher
*
* vchanger is free software.
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License version 2, as published by the Free
* Software Foundation.
*
* vchanger 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 vchanger. See the file "COPYING". If not,
* write to: The Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __UUIDLOOKUP_H_
#define __UUIDLOOKUP_H_
#ifdef __cplusplus
extern "C" {
#endif
int GetMountpointFromUUID(char *mountp, size_t mountp_sz, const char *uuid_str);
#ifdef __cplusplus
}
#endif
#endif /* __UUIDLOOKUP_H_ */
/* uuidlookup.h
*
* This file is part of vchanger by Josh Fisher.
*
* vchanger copyright (C) 2008-2013 Josh Fisher
*
* vchanger is free software.
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License version 2, as published by the Free
* Software Foundation.
*
* vchanger 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 vchanger. See the file "COPYING". If not,
* write to: The Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __UUIDLOOKUP_H_
#define __UUIDLOOKUP_H_
#ifdef __cplusplus
extern "C" {
#endif
int GetMountpointFromUUID(char *mountp, size_t mountp_sz, const char *uuid_str);
#ifdef __cplusplus
}
#endif
#endif /* __UUIDLOOKUP_H_ */

1468
src/vchanger.cpp
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