mirror of
https://github.com/sheumann/hush.git
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198 lines
4.2 KiB
C
198 lines
4.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* See README for additional information
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*
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* This file can be redistributed under the terms of the GNU Library General
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* Public License
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*/
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#include "libbb.h"
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#include "e2fs_lib.h"
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#define HAVE_EXT2_IOCTLS 1
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#if INT_MAX == LONG_MAX
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#define IF_LONG_IS_SAME(x) x
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#define IF_LONG_IS_WIDER(x)
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#else
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#define IF_LONG_IS_SAME(x)
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#define IF_LONG_IS_WIDER(x) x
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#endif
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static void close_silently(int fd)
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{
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int e = errno;
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close(fd);
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errno = e;
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}
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/* Iterate a function on each entry of a directory */
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int iterate_on_dir(const char *dir_name,
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int (*func)(const char *, struct dirent *, void *),
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void * private)
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{
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DIR *dir;
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struct dirent *de, *dep;
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int max_len, len;
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max_len = PATH_MAX + sizeof(struct dirent);
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de = xmalloc(max_len+1);
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memset(de, 0, max_len+1);
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dir = opendir(dir_name);
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if (dir == NULL) {
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free(de);
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return -1;
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}
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while ((dep = readdir(dir))) {
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len = sizeof(struct dirent);
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if (len < dep->d_reclen)
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len = dep->d_reclen;
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if (len > max_len)
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len = max_len;
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memcpy(de, dep, len);
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func(dir_name, de, private);
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}
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closedir(dir);
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free(de);
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return 0;
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}
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/* Get/set a file version on an ext2 file system */
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int fgetsetversion(const char *name, unsigned long *get_version, unsigned long set_version)
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{
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#if HAVE_EXT2_IOCTLS
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int fd, r;
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IF_LONG_IS_WIDER(int ver;)
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fd = open(name, O_NONBLOCK);
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if (fd == -1)
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return -1;
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if (!get_version) {
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IF_LONG_IS_WIDER(
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ver = (int) set_version;
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r = ioctl(fd, EXT2_IOC_SETVERSION, &ver);
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)
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IF_LONG_IS_SAME(
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r = ioctl(fd, EXT2_IOC_SETVERSION, (void*)&set_version);
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)
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} else {
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IF_LONG_IS_WIDER(
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r = ioctl(fd, EXT2_IOC_GETVERSION, &ver);
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*get_version = ver;
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)
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IF_LONG_IS_SAME(
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r = ioctl(fd, EXT2_IOC_GETVERSION, (void*)get_version);
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)
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}
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close_silently(fd);
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return r;
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#else /* ! HAVE_EXT2_IOCTLS */
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errno = EOPNOTSUPP;
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return -1;
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#endif /* ! HAVE_EXT2_IOCTLS */
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}
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/* Get/set a file flags on an ext2 file system */
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int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags)
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{
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#if HAVE_EXT2_IOCTLS
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struct stat buf;
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int fd, r;
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IF_LONG_IS_WIDER(int f;)
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if (stat(name, &buf) == 0 /* stat is ok */
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&& !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)
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) {
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goto notsupp;
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}
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fd = open(name, O_NONBLOCK); /* neither read nor write asked for */
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if (fd == -1)
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return -1;
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if (!get_flags) {
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IF_LONG_IS_WIDER(
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f = (int) set_flags;
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r = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
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)
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IF_LONG_IS_SAME(
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r = ioctl(fd, EXT2_IOC_SETFLAGS, (void*)&set_flags);
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)
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} else {
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IF_LONG_IS_WIDER(
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r = ioctl(fd, EXT2_IOC_GETFLAGS, &f);
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*get_flags = f;
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)
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IF_LONG_IS_SAME(
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r = ioctl(fd, EXT2_IOC_GETFLAGS, (void*)get_flags);
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)
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}
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close_silently(fd);
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return r;
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notsupp:
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#endif /* HAVE_EXT2_IOCTLS */
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errno = EOPNOTSUPP;
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return -1;
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}
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/* Print file attributes on an ext2 file system */
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struct flags_name {
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unsigned long flag;
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char short_name;
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const char *long_name;
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};
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static const struct flags_name flags_array[] = {
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{ EXT2_SECRM_FL, 's', "Secure_Deletion" },
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{ EXT2_UNRM_FL, 'u' , "Undelete" },
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{ EXT2_SYNC_FL, 'S', "Synchronous_Updates" },
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{ EXT2_DIRSYNC_FL, 'D', "Synchronous_Directory_Updates" },
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{ EXT2_IMMUTABLE_FL, 'i', "Immutable" },
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{ EXT2_APPEND_FL, 'a', "Append_Only" },
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{ EXT2_NODUMP_FL, 'd', "No_Dump" },
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{ EXT2_NOATIME_FL, 'A', "No_Atime" },
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{ EXT2_COMPR_FL, 'c', "Compression_Requested" },
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#ifdef ENABLE_COMPRESSION
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{ EXT2_COMPRBLK_FL, 'B', "Compressed_File" },
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{ EXT2_DIRTY_FL, 'Z', "Compressed_Dirty_File" },
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{ EXT2_NOCOMPR_FL, 'X', "Compression_Raw_Access" },
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{ EXT2_ECOMPR_FL, 'E', "Compression_Error" },
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#endif
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{ EXT3_JOURNAL_DATA_FL, 'j', "Journaled_Data" },
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{ EXT2_INDEX_FL, 'I', "Indexed_directory" },
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{ EXT2_NOTAIL_FL, 't', "No_Tailmerging" },
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{ EXT2_TOPDIR_FL, 'T', "Top_of_Directory_Hierarchies" },
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{ 0, '\0', NULL }
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};
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void print_flags(FILE *f, unsigned long flags, unsigned options)
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{
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const struct flags_name *fp;
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if (options & PFOPT_LONG) {
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int first = 1;
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for (fp = flags_array; fp->short_name; fp++) {
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if (flags & fp->flag) {
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if (!first)
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fputs(", ", f);
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fputs(fp->long_name, f);
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first = 0;
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}
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}
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if (first)
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fputs("---", f);
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} else {
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for (fp = flags_array; fp->short_name; fp++) {
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char c = '-';
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if (flags & fp->flag)
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c = fp->short_name;
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fputc(c, f);
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}
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}
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}
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