Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 529 insertions, 0 deletions

diff --git a/include/iprt/linux/Makefile.kup b/include/iprt/linux/Makefile.kup
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/include/iprt/linux/Makefile.kup
diff --git a/include/iprt/linux/symvers.h b/include/iprt/linux/symvers.h
new file mode 100644
index 00000000..8fb96d97
--- /dev/null
+++ b/include/iprt/linux/symvers.h
@@ -0,0 +1,76 @@
+/** @file
+ * IPRT - Linux symver and compatibility definitions.
+ */
+
+/*
+ * Copyright (C) 2008-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+/* Various tricks to produce binaries which can be run on old Linux
+ * distributions.  This will almost certainly need updating as time
+ * goes by. */
+
+#ifndef IPRT_INCLUDED_linux_symvers_h
+#define IPRT_INCLUDED_linux_symvers_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+/* Please use -fno-stack-protector on the command line to avoid stack check
+ * functions which are not available in EL3 for 32-bit builds. */
+
+/* Use versions of glibc symbols which are available in 32-bit EL3 or
+ * 64-bit EL4.  Currently only those symbols needed by the Additions,
+ * though this could probably be extended to work for host builds too. */
+#if defined(RT_ARCH_AMD64)
+__asm__(".symver memcpy,memcpy@GLIBC_2.2.5");
+__asm__(".symver posix_spawn,posix_spawn@GLIBC_2.2.5");
+#else  /* RT_ARCH_X86 */
+__asm__(".symver posix_spawn,posix_spawn@GLIBC_2.2");
+#endif
+
+/* Do not use *_chk functions */
+#undef _FORTIFY_SOURCE
+
+/* Do not use __isoc99_* functions */
+#undef __USE_GNU
+#define __USE_GNU 1
+
+/* And EL5 wants this too with __USE_GNU */
+#undef _GNU_SOURCE
+#define _GNU_SOURCE 1
+
+/* Tell IPRT not to use newer functions */
+#include <features.h>
+#undef __GLIBC_MINOR__
+#define __GLIBC_MINOR__ 3
+
+/* Do not use fcntl64 */
+#include <fcntl.h>
+#ifdef fnctl
+# undef fcntl
+#endif
+#if defined(RT_ARCH_AMD64)
+__asm__(".symver fcntl64,fcntl@GLIBC_2.2.5");
+#else
+__asm__(".symver fcntl64,fcntl@GLIBC_2.0");
+#endif
+
+#endif /* !IPRT_INCLUDED_linux_symvers_h */
diff --git a/include/iprt/linux/sysfs.h b/include/iprt/linux/sysfs.h
new file mode 100644
index 00000000..502d9831
--- /dev/null
+++ b/include/iprt/linux/sysfs.h
@@ -0,0 +1,453 @@
+/* $Id: sysfs.h $ */
+/** @file
+ * IPRT - Linux sysfs access.
+ */
+
+/*
+ * Copyright (C) 2008-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+#ifndef IPRT_INCLUDED_linux_sysfs_h
+#define IPRT_INCLUDED_linux_sysfs_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+#include <iprt/types.h>
+#include <iprt/stdarg.h>
+
+#include <sys/types.h> /* for dev_t */
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_rt_linux_sysfs    RTLinuxSysfs - Linux sysfs
+ * @ingroup grp_rt
+ * @{
+ */
+
+/**
+ * Checks if a sysfs file (or directory, device, symlink, whatever) exists.
+ *
+ * @returns true if the sysfs object exists.
+ *          false otherwise or if an error occurred.
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   va          The format args.
+ */
+RTDECL(bool) RTLinuxSysFsExistsV(const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(1, 0);
+
+/**
+ * Checks if a sysfs object (directory, device, symlink, whatever) exists.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS if the sysfs object exists.
+ * @retval  VERR_FILE_NOT_FOUND if the sysfs object does not exist.
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   va          The format args.
+ */
+RTDECL(int) RTLinuxSysFsExistsExV(const char *pszFormat, va_list va)  RT_IPRT_FORMAT_ATTR(1, 0);
+
+/**
+ * Checks if a sysfs file (or directory, device, symlink, whatever) exists.
+ *
+ * @returns true if the sysfs object exists.
+ *          false otherwise or if an error occurred.
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   ...         The format args.
+ */
+RTDECL(bool) RTLinuxSysFsExists(const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(1, 2);
+
+/**
+ * Checks if a sysfs object (directory, device, symlink, whatever) exists.
+ *
+ * @returns IPRT status code.
+ * @retval  VINF_SUCCESS if the sysfs object exists.
+ * @retval  VERR_FILE_NOT_FOUND if the sysfs object does not exist.
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   ...         The format args.
+ */
+RTDECL(int) RTLinuxSysFsExistsEx(const char *pszFormat, ...)  RT_IPRT_FORMAT_ATTR(1, 2);
+
+/**
+ * Opens a sysfs file for reading.
+ *
+ * @returns IPRT status code.
+ * @param   phFile      Where to store the file handle on success.
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   va          The format args.
+ *
+ * @note Close the file using RTFileClose().
+ */
+RTDECL(int) RTLinuxSysFsOpenV(PRTFILE phFile, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(2, 0);
+
+/**
+ * Opens a sysfs file - extended version.
+ *
+ * @returns IPRT status code.
+ * @param   phFile      Where to store the file handle on success.
+ * @param   fOpen       Open flags, see RTFileOpen().
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   va          The format args.
+ */
+RTDECL(int) RTLinuxSysFsOpenExV(PRTFILE phFile, uint64_t fOpen, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(3, 0);
+
+/**
+ * Opens a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   phFile      Where to store the file handle on success.
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   ...         The format args.
+ *
+ * @note Close the file using RTFileClose().
+ */
+RTDECL(int) RTLinuxSysFsOpen(PRTFILE phFile, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(2, 3);
+
+/**
+ * Opens a sysfs file - extended version.
+ *
+ * @returns IPRT status code.
+ * @param   phFile      Where to store the file handle on success.
+ * @param   fOpen       Open flags, see RTFileOpen().
+ * @param   pszFormat   The name format, either absolute or relative to "/sys/".
+ * @param   ...         The format args.
+ */
+RTDECL(int) RTLinuxSysFsOpenEx(PRTFILE phFile, uint64_t fOpen, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4);
+
+/**
+ * Reads a string from a file opened with RTLinuxSysFsOpen or RTLinuxSysFsOpenV.
+ *
+ * Expects to read the whole file, mind, and will return VERR_BUFFER_OVERFLOW if
+ * that is not possible with the given buffer size.
+ *
+ * @returns IPRT status code.
+ * @param   hFile       The file descriptor returned by RTLinuxSysFsOpen or RTLinuxSysFsOpenV.
+ * @param   pszBuf      Where to store the string.
+ * @param   cchBuf      The size of the buffer. Must be at least 2 bytes.
+ * @param   pcchRead    Where to store the amount of characters read on success - optional.
+ */
+RTDECL(int) RTLinuxSysFsReadStr(RTFILE hFile, char *pszBuf, size_t cchBuf, size_t *pcchRead);
+
+/**
+ * Writes a string to a file opened with RTLinuxSysFsOpenEx or RTLinuxSysFsOpenExV for writing.
+ *
+ * @returns IPRT status code.
+ * @param   hFile       The file descriptor returned by RTLinuxSysFsOpenEx or RTLinuxSysFsOpenExV.
+ * @param   pszBuf      The string to write.
+ * @param   cchBuf      The length of the string to write - if 0 is given
+ *                      the string length is determined before writing it including the zero terminator.
+ * @param   pcchWritten Where to store the amount of characters written on success - optional.
+ */
+RTDECL(int) RTLinuxSysFsWriteStr(RTFILE hFile, const char *pszBuf, size_t cchBuf, size_t *pcchWritten);
+
+/**
+ * Reads the remainder of a file opened with RTLinuxSysFsOpen or
+ * RTLinuxSysFsOpenV.
+ *
+ * @returns IPRT status code.
+ * @param   hFile       The file descriptor returned by RTLinuxSysFsOpen or RTLinuxSysFsOpenV.
+ * @param   pvBuf       Where to store the bits from the file.
+ * @param   cbBuf       The size of the buffer.
+ * @param   pcbRead     Where to return the number of bytes read.  Optional.
+ */
+RTDECL(int) RTLinuxSysFsReadFile(RTFILE hFile, void *pvBuf, size_t cbBuf, size_t *pcbRead);
+
+/**
+ * Writes the given buffer to a file opened with RTLinuxSysFsOpenEx or
+ * RTLinuxSysFsOpenExV.
+ *
+ * @returns IPRT status code.
+ * @param   hFile       The file descriptor returned by RTLinuxSysFsOpenEx or RTLinuxSysFsOpenExV.
+ * @param   pvBuf       The data to write.
+ * @param   cbBuf       The size of the buffer.
+ * @param   pcbWritten  Where to return the number of bytes read.  Optional.
+ */
+RTDECL(int) RTLinuxSysFsWriteFile(RTFILE hFile, void *pvBuf, size_t cbBuf, size_t *pcbWritten);
+
+/**
+ * Reads a number from a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The number base, 0 for autodetect.
+ * @param   pi64        Where to store the 64-bit signed on success.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsReadIntFileV(unsigned uBase, int64_t *pi64, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(3, 0);
+
+/**
+ * Reads a number from a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The number base, 0 for autodetect.
+ * @param   pi64        Where to store the 64-bit signed on success.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsReadIntFile(unsigned uBase, int64_t *pi64, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4);
+
+/**
+ * Writes an unsigned 8-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u8          The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU8FileV(unsigned uBase, uint8_t u8, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(3, 0);
+
+/**
+ * Writes an unsigned 8-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u8          The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU8File(unsigned uBase, uint8_t u8, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4);
+
+/**
+ * Writes an unsigned 16-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u16         The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU16FileV(unsigned uBase, uint16_t u16, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(3, 0);
+
+/**
+ * Writes an unsigned 16-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u16         The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU16File(unsigned uBase, uint16_t u16, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4);
+
+/**
+ * Writes an unsigned 32-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u32         The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU32FileV(unsigned uBase, uint32_t u32, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(3, 0);
+
+/**
+ * Writes an unsigned 8-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u32         The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU32File(unsigned uBase, uint32_t u32, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4);
+
+/**
+ * Writes an unsigned 64-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u64         The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU64FileV(unsigned uBase, uint64_t u64, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(3, 0);
+
+/**
+ * Writes an unsigned 8-bit number to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   uBase       The base format to write the number. Passing 16 here for
+ *                      example writes the number as a hexadecimal string with 0x prepended.
+ * @param   u64         The number to write.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteU64File(unsigned uBase, uint32_t u64, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(3, 4);
+
+/**
+ * Reads a device number from a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   pDevNum     Where to store the device number on success.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsReadDevNumFileV(dev_t *pDevNum, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(2, 0);
+
+/**
+ * Reads a device number from a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   pDevNum     Where to store the device number on success.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsReadDevNumFile(dev_t *pDevNum, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(2, 3);
+
+/**
+ * Reads a string from a sysfs file.
+ *
+ * If the file contains a newline, we only return the text up until there.  This
+ * differs from the RTLinuxSysFsReadStr() behaviour.
+ *
+ * @returns IPRT status code.
+ * @param   pszBuf      Where to store the path element.  Must be at least two
+ *                      characters, but a longer buffer would be advisable.
+ * @param   cchBuf      The size of the buffer pointed to by @a pszBuf.
+ * @param   pcchRead    Where to store the amount of characters read on success - optional.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsReadStrFileV(char *pszBuf, size_t cchBuf, size_t *pcchRead, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(4, 0);
+
+/**
+ * Reads a string from a sysfs file.  If the file contains a newline, we only
+ * return the text up until there.
+ *
+ * @returns IPRT status code.
+ * @param   pszBuf      Where to store the path element.  Must be at least two
+ *                      characters, but a longer buffer would be advisable.
+ * @param   cchBuf      The size of the buffer pointed to by @a pszBuf.
+ * @param   pcchRead    Where to store the amount of characters read on success - optional.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsReadStrFile(char *pszBuf, size_t cchBuf, size_t *pcchRead, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(4, 5);
+
+/**
+ * Writes a string to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   pszBuf      The string to write.
+ * @param   cchBuf      The size of the buffer pointed to by @a pszBuf.
+ * @param   pcchWritten Where to store the amount of characters written on success - optional.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va          Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteStrFileV(const char *pszBuf, size_t cchBuf, size_t *pcchWritten, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(4, 0);
+
+/**
+ * Writes a string to a sysfs file.
+ *
+ * @returns IPRT status code.
+ * @param   pszBuf      The string to write.
+ * @param   cchBuf      The size of the buffer pointed to by @a pszBuf.
+ * @param   pcchWritten Where to store the amount of characters written on success - optional.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsWriteStrFile(const char *pszBuf, size_t cchBuf, size_t *pcchWritten, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(4, 5);
+
+/**
+ * Reads the last element of the path of the file pointed to by the symbolic
+ * link specified.
+ *
+ * This is needed at least to get the name of the driver associated with a
+ * device, where pszFormat should be the "driver" link in the devices sysfs
+ * directory.
+ *
+ * @returns IPRT status code.
+ * @param   pszBuf      Where to store the path element.  Must be at least two
+ *                      characters, but a longer buffer would be advisable.
+ * @param   cchBuf      The size of the buffer pointed to by @a pszBuf.
+ * @param   pchBuf      Where to store the length of the returned string on success - optional.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   va           Format args.
+ */
+RTDECL(int) RTLinuxSysFsGetLinkDestV(char *pszBuf, size_t cchBuf, size_t *pchBuf, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(4, 0);
+
+/**
+ * Reads the last element of the path of the file pointed to by the symbolic
+ * link specified.
+ *
+ * This is needed at least to get the name of the driver associated with a
+ * device, where pszFormat should be the "driver" link in the devices sysfs
+ * directory.
+ *
+ * @returns IPRT status code.
+ * @param   pszBuf      Where to store the path element.  Must be at least two
+ *                      characters, but a longer buffer would be advisable.
+ * @param   cchBuf      The size of the buffer pointed to by @a pszBuf.
+ * @param   pchBuf      Where to store the length of the returned string on success - optional.
+ * @param   pszFormat   The filename format, either absolute or relative to "/sys/".
+ * @param   ...         Format args.
+ */
+RTDECL(int) RTLinuxSysFsGetLinkDest(char *pszBuf, size_t cchBuf, size_t *pchBuf, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(4, 5);
+
+/**
+ * Check the path of a device node under /dev, given the device number and a
+ * pattern and store the path into @a pszBuf.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_FILE_NOT_FOUND if no matching device node could be found.
+ * @param   DevNum         The device number to search for.
+ * @param   fMode          The type of device - only RTFS_TYPE_DEV_CHAR and
+ *                         RTFS_TYPE_DEV_BLOCK are valid values.
+ * @param   pszBuf         Where to store the path.
+ * @param   cchBuf         The size of the buffer.
+ * @param   pszPattern     The expected path format of the device node, either
+ *                         absolute or relative to "/dev".
+ * @param   va             Format args.
+ */
+RTDECL(int) RTLinuxCheckDevicePathV(dev_t DevNum, RTFMODE fMode, char *pszBuf, size_t cchBuf,
+                                    const char *pszPattern, va_list va) RT_IPRT_FORMAT_ATTR(5, 0);
+
+/**
+ * Check the path of a device node under /dev, given the device number and a
+ * pattern and store the path into @a pszBuf.
+ *
+ * @returns IPRT status code.
+ * @retval  VERR_FILE_NOT_FOUND if no matching device node could be found.
+ * @param   DevNum          The device number to search for
+ * @param   fMode           The type of device - only RTFS_TYPE_DEV_CHAR and
+ *                          RTFS_TYPE_DEV_BLOCK are valid values
+ * @param   pszBuf          Where to store the path.
+ * @param   cchBuf          The size of the buffer.
+ * @param   pszPattern      The expected path format of the device node, either
+ *                          absolute or relative to "/dev".
+ * @param   ...             Format args.
+ */
+RTDECL(int) RTLinuxCheckDevicePath(dev_t DevNum, RTFMODE fMode, char *pszBuf, size_t cchBuf,
+                                   const char *pszPattern, ...) RT_IPRT_FORMAT_ATTR(5, 6);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_linux_sysfs_h */
+