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New API call iso_local_create_dev()

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This commit is contained in:
Thomas Schmitt 2025-04-16 09:19:10 +02:00
parent f314f3059b
commit 955a7cd3bb
6 changed files with 158 additions and 3 deletions
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25
libisofs/aaip-os-dummy.c
View File

@ -11,7 +11,7 @@
To be included by aaip_0_2.c
Copyright (c) 2009 - 2024 Thomas Schmitt
Copyright (c) 2009 - 2025 Thomas Schmitt
This file is part of the libisofs project; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
@ -176,3 +176,26 @@ int aaip_set_projid(char *path, uint32_t projid, int *os_errno, int flag)
}
/* -------- API for creating device files in the local filesystem --------- */
/* API */
/* @param flag bit0= do not issue error messages
*/
int iso_local_create_dev(char *disk_path, mode_t st_mode, dev_t dev,
int *os_errno, int flag)
{
/* From man mknod:
POSIX.1-2001 says: "The only portable use of mknod() is to create a
FIFO-special file. If mode is not S_IFIFO or dev is not 0, the behav‐
ior of mknod() is unspecified."
*/
*os_errno= 0;
if(!(flag & 1))
iso_msg_submit(-1, ISO_DEV_NO_CREATION, 0,
"File \"%s\" cannot be created because device file creation is not enabled",
disk_path);
return ISO_DEV_NO_CREATION;
}

43
libisofs/aaip-os-freebsd.c
View File

@ -7,7 +7,7 @@
To be included by aaip_0_2.c for FreeBSD, NetBSD, and OpenBSD
Copyright (c) 2009 - 2024 Thomas Schmitt
Copyright (c) 2009 - 2025 Thomas Schmitt
This file is part of the libisofs project; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
@ -1146,3 +1146,44 @@ int aaip_set_projid(char *path, uint32_t projid, int *os_errno, int flag)
}
/* -------- API for creating device files in the local filesystem --------- */
/* API */
/* @param flag bit0= do not issue error messages
*/
int iso_local_create_dev(char *disk_path, mode_t st_mode, dev_t dev,
int *os_errno, int flag)
{
int ret;
*os_errno= 0;
if((st_mode & S_IFMT) != S_IFBLK && (st_mode & S_IFMT) != S_IFCHR) {
if(!(flag & 1))
iso_msg_submit(-1, ISO_DEV_NO_CREATION, 0,
"Device file \"%s\" cannot be created because not of type S_IFBLK or S_IFCHR",
disk_path);
return ISO_DEV_NO_CREATION;
}
st_mode&= (S_IFMT | 07777);
ret= mknod(disk_path, st_mode, dev);
if(ret == -1) {
*os_errno= errno;
if(!(flag & 1)) {
if(errno > 0) {
iso_msg_submit(-1, ISO_DEV_NOT_CREATED, 0,
"Creation of device file \"%s\" failed with %d '%s'",
disk_path, errno, strerror(errno));
} else {
iso_msg_submit(-1, ISO_DEV_NOT_CREATED, 0,
"Creation of device file \"%s\" failed without error code",
disk_path);
}
}
return ISO_DEV_NOT_CREATED;
}
return(ISO_SUCCESS);
}

45
libisofs/aaip-os-linux.c
View File

@ -7,7 +7,7 @@
To be included by aaip_0_2.c for Linux
Copyright (c) 2009 - 2024 Thomas Schmitt
Copyright (c) 2009 - 2025 Thomas Schmitt
This file is part of the libisofs project; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
@ -27,6 +27,7 @@
#include <string.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
@ -1125,3 +1126,45 @@ int aaip_set_projid(char *path, uint32_t projid, int *os_errno, int flag)
return(ret);
}
/* -------- API for creating device files in the local filesystem --------- */
/* API */
/* @param flag bit0= do not issue error messages
*/
int iso_local_create_dev(char *disk_path, mode_t st_mode, dev_t dev,
int *os_errno, int flag)
{
int ret;
*os_errno= 0;
if((st_mode & S_IFMT) != S_IFBLK && (st_mode & S_IFMT) != S_IFCHR) {
if(!(flag & 1))
iso_msg_submit(-1, ISO_DEV_NO_CREATION, 0,
"Device file \"%s\" cannot be created because not of type S_IFBLK or S_IFCHR",
disk_path);
return ISO_DEV_NO_CREATION;
}
st_mode&= (S_IFMT | 07777);
ret= mknod(disk_path, st_mode, dev);
if(ret == -1) {
*os_errno= errno;
if(!(flag & 1)) {
if(errno > 0) {
iso_msg_submit(-1, ISO_DEV_NOT_CREATED, 0,
"Creation of device file \"%s\" failed with %d '%s'",
disk_path, errno, strerror(errno));
} else {
iso_msg_submit(-1, ISO_DEV_NOT_CREATED, 0,
"Creation of device file \"%s\" failed without error code",
disk_path);
}
}
return ISO_DEV_NOT_CREATED;
}
return(ISO_SUCCESS);
}

43
libisofs/libisofs.h
View File

@ -8381,6 +8381,42 @@ int iso_local_set_projid(char *disk_path, uint32_t projid, int *os_errno,
int flag);
/* -------- API for creating device files in the local filesystem --------- */
/**
* Create a device file in the local filesystem.
* Equivalent of non-portable and possibly obsolete mknod(2).
* Whether this makes sense on modern systems is very questionable. But as
* libisofs records device files, it should try to restore them where
* device creation might be supported.
*
* @param disk_path
* Path in the local filesystem where to create the file.
* @param st_mode
* File type and permission bits as of man stat(2) field st_mode.
* Possibly supported file types are: S_IFCHR , S_IFBLK
* @param dev
* System specific parameters for the new device file. It should have
* been originally obtained by a stat(2) call on a system with compatible
* device parameters.
* @param os_errno
* Will get filled with errno if a system call fails.
* Else it will be filled with 0.
* @param flag
* Bitfield for control purposes.
* bit0= do not issue error messages
* @return
* ISO_SUCCESS or <0 to indicate error.
*
* @since 1.5.8
*/
int iso_local_create_dev(char *disk_path, mode_t st_mode, dev_t dev,
int *os_errno, int flag);
/* ------------------------------------------------------------------------- */
/* Default in case that the compile environment has no macro PATH_MAX.
*/
#define Libisofs_default_path_maX 4096
@ -9910,6 +9946,13 @@ int iso_conv_name_chars(IsoWriteOpts *opts, char *name, size_t name_len,
/** More than 4294967295 bytes of Continuation area (WARNING,HIGH, -441) */
#define ISO_INSANE_CE_SIZE 0xD030FE47
/** Creation of device file in local filesystem failed (FAILURE,HIGH, -442) */
#define ISO_DEV_NOT_CREATED 0xE830FE46
/** Creation of device file type in local filesystem is not enabled
(FAILURE,HIGH, -443) */
#define ISO_DEV_NO_CREATION 0xE830FE45
/* Internal developer note:
Place new error codes directly above this comment.

1
libisofs/libisofs.ver
View File

@ -386,6 +386,7 @@ local: *;
};
LIBISOFS6_1.5.8 {
iso_local_create_dev;
iso_local_get_lfa_flags;
iso_local_get_projid;
iso_local_set_lfa_flags;

4
libisofs/messages.c
View File

@ -597,6 +597,10 @@ const char *iso_error_to_msg(int errcode)
return "Size calculation mismatch with directory record or continuation area";
case ISO_INSANE_CE_SIZE:
return "More than 4294967295 bytes of Continuation area";
case ISO_DEV_NOT_CREATED:
return "Creation of device file in local filesystem failed";
case ISO_DEV_NO_CREATION:
return "Creation of device file type in local filesystem not enabled";
default:
return "Unknown error";
}