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/* vi: set sw=4 ts=4: */
/*
* See README for additional information
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#include "libbb.h"
#include "e2fs_lib.h"
#define HAVE_EXT2_IOCTLS 1
#if INT_MAX == LONG_MAX
#define IF_LONG_IS_SAME(...) __VA_ARGS__
#define IF_LONG_IS_WIDER(...)
#else
#define IF_LONG_IS_SAME(...)
#define IF_LONG_IS_WIDER(...) __VA_ARGS__
#endif
static void close_silently(int fd)
{
int e = errno;
close(fd);
errno = e;
}
/* Iterate a function on each entry of a directory */
int iterate_on_dir(const char *dir_name,
int FAST_FUNC (*func)(const char *, struct dirent *, void *),
void *private)
{
DIR *dir;
struct dirent *de;
dir = opendir(dir_name);
if (dir == NULL) {
return -1;
}
while ((de = readdir(dir)) != NULL) {
func(dir_name, de, private);
}
closedir(dir);
return 0;
}
/* Get/set a file version on an ext2 file system */
int fgetsetversion(const char *name, unsigned long *get_version, unsigned long set_version)
{
#if HAVE_EXT2_IOCTLS
int fd, r;
IF_LONG_IS_WIDER(unsigned ver;)
fd = open(name, O_RDONLY | O_NONBLOCK);
if (fd == -1)
return -1;
if (!get_version) {
IF_LONG_IS_WIDER(
ver = (unsigned) set_version;
r = ioctl(fd, EXT2_IOC_SETVERSION, &ver);
)
IF_LONG_IS_SAME(
r = ioctl(fd, EXT2_IOC_SETVERSION, (void*)&set_version);
)
} else {
IF_LONG_IS_WIDER(
r = ioctl(fd, EXT2_IOC_GETVERSION, &ver);
*get_version = ver;
)
IF_LONG_IS_SAME(
r = ioctl(fd, EXT2_IOC_GETVERSION, (void*)get_version);
)
}
close_silently(fd);
return r;
#else /* ! HAVE_EXT2_IOCTLS */
errno = EOPNOTSUPP;
return -1;
#endif /* ! HAVE_EXT2_IOCTLS */
}
int fgetsetprojid(const char *name, uint32_t *get, uint32_t set)
{
#if HAVE_EXT2_IOCTLS
struct ext2_fsxattr fsxattr;
int fd, r;
fd = open(name, O_RDONLY | O_NONBLOCK);
if (fd == -1)
return -1;
r = ioctl(fd, EXT2_IOC_FSGETXATTR, &fsxattr);
/* note: ^^^ may fail in 32-bit userspace on 64-bit kernel (seen on 4.12.0) */
if (r == 0) {
if (get) {
*get = fsxattr.fsx_projid;
} else {
fsxattr.fsx_projid = set;
r = ioctl(fd, EXT2_IOC_FSSETXATTR, &fsxattr);
}
}
close_silently(fd);
return r;
#else /* ! HAVE_EXT2_IOCTLS */
errno = EOPNOTSUPP;
return -1;
#endif /* ! HAVE_EXT2_IOCTLS */
}
/* Get/set a file flags on an ext2 file system */
int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags)
{
#if HAVE_EXT2_IOCTLS
struct stat buf;
int fd, r;
IF_LONG_IS_WIDER(unsigned f;)
if (stat(name, &buf) == 0 /* stat is ok */
&& !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)
) {
goto notsupp;
}
fd = open(name, O_RDONLY | O_NONBLOCK); /* neither read nor write asked for */
if (fd == -1)
return -1;
if (!get_flags) {
IF_LONG_IS_WIDER(
f = (unsigned) set_flags;
r = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
)
IF_LONG_IS_SAME(
r = ioctl(fd, EXT2_IOC_SETFLAGS, (void*)&set_flags);
)
} else {
IF_LONG_IS_WIDER(
r = ioctl(fd, EXT2_IOC_GETFLAGS, &f);
*get_flags = f;
)
IF_LONG_IS_SAME(
r = ioctl(fd, EXT2_IOC_GETFLAGS, (void*)get_flags);
)
}
close_silently(fd);
return r;
notsupp:
#endif /* HAVE_EXT2_IOCTLS */
errno = EOPNOTSUPP;
return -1;
}
/* Print file attributes on an ext2 file system */
const uint32_t e2attr_flags_value[] ALIGN4 = {
#ifdef ENABLE_COMPRESSION
EXT2_COMPRBLK_FL,
EXT2_DIRTY_FL,
EXT2_NOCOMPR_FL,
#endif
EXT2_SECRM_FL,
EXT2_UNRM_FL,
EXT2_SYNC_FL,
EXT2_DIRSYNC_FL,
EXT2_IMMUTABLE_FL,
EXT2_APPEND_FL,
EXT2_NODUMP_FL,
EXT2_NOATIME_FL,
EXT2_COMPR_FL,
EXT2_ECOMPR_FL,
EXT3_JOURNAL_DATA_FL,
EXT2_INDEX_FL,
EXT2_NOTAIL_FL,
EXT2_TOPDIR_FL,
EXT2_EXTENT_FL,
EXT2_NOCOW_FL,
EXT2_CASEFOLD_FL,
EXT2_INLINE_DATA_FL,
EXT2_PROJINHERIT_FL,
EXT2_VERITY_FL,
};
const char e2attr_flags_sname[] ALIGN1 =
#ifdef ENABLE_COMPRESSION
"BZX"
#endif
"suSDiadAcEjItTeCFNPV";
static const char e2attr_flags_lname[] ALIGN1 =
#ifdef ENABLE_COMPRESSION
"Compressed_File" "\0"
"Compressed_Dirty_File" "\0"
"Compression_Raw_Access" "\0"
#endif
"Secure_Deletion" "\0"
"Undelete" "\0"
"Synchronous_Updates" "\0"
"Synchronous_Directory_Updates" "\0"
"Immutable" "\0"
"Append_Only" "\0"
"No_Dump" "\0"
"No_Atime" "\0"
"Compression_Requested" "\0"
"Encrypted" "\0"
"Journaled_Data" "\0"
"Indexed_directory" "\0"
"No_Tailmerging" "\0"
"Top_of_Directory_Hierarchies" "\0"
"Extents" "\0"
"No_COW" "\0"
"Casefold" "\0"
"Inline_Data" "\0"
"Project_Hierarchy" "\0"
"Verity" "\0"
/* Another trailing NUL is added by compiler */;
void print_e2flags(FILE *f, unsigned long flags, unsigned options)
{
const uint32_t *fv;
const char *fn;
fv = e2attr_flags_value;
if (options & PFOPT_LONG) {
int first = 1;
fn = e2attr_flags_lname;
do {
if (flags & *fv) {
if (!first)
fputs(", ", f);
fputs(fn, f);
first = 0;
}
fv++;
fn += strlen(fn) + 1;
} while (*fn);
if (first)
fputs("---", f);
} else {
fn = e2attr_flags_sname;
do {
char c = '-';
if (flags & *fv)
c = *fn;
fputc(c, f);
fv++;
fn++;
} while (*fn);
}
}
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