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/* vi: set sw=4 ts=4: */
/*
* See README for additional information
*
* Licensed under GPLv2, see file LICENSE in this tarball for details.
*/
#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 (*func)(const char *, struct dirent *, void *),
void * private)
{
DIR *dir;
struct dirent *de, *dep;
int max_len, len;
max_len = PATH_MAX + sizeof(struct dirent);
de = xmalloc(max_len+1);
memset(de, 0, max_len+1);
dir = opendir(dir_name);
if (dir == NULL) {
free(de);
return -1;
}
while ((dep = readdir(dir))) {
len = sizeof(struct dirent);
if (len < dep->d_reclen)
len = dep->d_reclen;
if (len > max_len)
len = max_len;
memcpy(de, dep, len);
func(dir_name, de, private);
}
closedir(dir);
free(de);
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(int ver;)
fd = open(name, O_NONBLOCK);
if (fd == -1)
return -1;
if (!get_version) {
IF_LONG_IS_WIDER(
ver = (int) 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 */
}
/* 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(int 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_NONBLOCK); /* neither read nor write asked for */
if (fd == -1)
return -1;
if (!get_flags) {
IF_LONG_IS_WIDER(
f = (int) 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[] = {
#ifdef ENABLE_COMPRESSION
EXT2_COMPRBLK_FL,
EXT2_DIRTY_FL,
EXT2_NOCOMPR_FL,
EXT2_ECOMPR_FL,
#endif
EXT2_INDEX_FL,
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,
EXT3_JOURNAL_DATA_FL,
EXT2_NOTAIL_FL,
EXT2_TOPDIR_FL
};
const char e2attr_flags_sname[] =
#ifdef ENABLE_COMPRESSION
"BZXE"
#endif
"I"
"suSDiadAcjtT";
static const char e2attr_flags_lname[] =
#ifdef ENABLE_COMPRESSION
"Compressed_File" "\0"
"Compressed_Dirty_File" "\0"
"Compression_Raw_Access" "\0"
"Compression_Error" "\0"
#endif
"Indexed_directory" "\0"
"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"
"Journaled_Data" "\0"
"No_Tailmerging" "\0"
"Top_of_Directory_Hierarchies" "\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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