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/* vi: set sw=4 ts=4: */
/*
* See README for additional information
*
* This file can be redistributed under the terms of the GNU Library General
* Public License
*/
#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 */
struct flags_name {
unsigned long flag;
char short_name;
const char *long_name;
};
/* TODO: apart from I and (disabled) COMPRESSION flags, this
* is a duplicate of a table from chattr. Merge? */
static const struct flags_name flags_array[] = {
{ EXT2_SECRM_FL, 's', "Secure_Deletion" },
{ EXT2_UNRM_FL, 'u' , "Undelete" },
{ EXT2_SYNC_FL, 'S', "Synchronous_Updates" },
{ EXT2_DIRSYNC_FL, 'D', "Synchronous_Directory_Updates" },
{ EXT2_IMMUTABLE_FL, 'i', "Immutable" },
{ EXT2_APPEND_FL, 'a', "Append_Only" },
{ EXT2_NODUMP_FL, 'd', "No_Dump" },
{ EXT2_NOATIME_FL, 'A', "No_Atime" },
{ EXT2_COMPR_FL, 'c', "Compression_Requested" },
#ifdef ENABLE_COMPRESSION
{ EXT2_COMPRBLK_FL, 'B', "Compressed_File" },
{ EXT2_DIRTY_FL, 'Z', "Compressed_Dirty_File" },
{ EXT2_NOCOMPR_FL, 'X', "Compression_Raw_Access" },
{ EXT2_ECOMPR_FL, 'E', "Compression_Error" },
#endif
{ EXT3_JOURNAL_DATA_FL, 'j', "Journaled_Data" },
{ EXT2_INDEX_FL, 'I', "Indexed_directory" },
{ EXT2_NOTAIL_FL, 't', "No_Tailmerging" },
{ EXT2_TOPDIR_FL, 'T', "Top_of_Directory_Hierarchies" },
{ 0, '\0', NULL }
};
void print_flags(FILE *f, unsigned long flags, unsigned options)
{
const struct flags_name *fp;
if (options & PFOPT_LONG) {
int first = 1;
for (fp = flags_array; fp->short_name; fp++) {
if (flags & fp->flag) {
if (!first)
fputs(", ", f);
fputs(fp->long_name, f);
first = 0;
}
}
if (first)
fputs("---", f);
} else {
for (fp = flags_array; fp->short_name; fp++) {
char c = '-';
if (flags & fp->flag)
c = fp->short_name;
fputc(c, f);
}
}
}
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