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Added O_RDONLY where improves readability. Note: O_RDONLY == 0, so it is there even if not specified. function old new delta stty_main 1289 1235 -54 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
214 lines
4.1 KiB
C
214 lines
4.1 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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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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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(...) __VA_ARGS__
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#define IF_LONG_IS_WIDER(...)
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#else
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#define IF_LONG_IS_SAME(...)
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#define IF_LONG_IS_WIDER(...) __VA_ARGS__
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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 FAST_FUNC (*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;
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dir = opendir(dir_name);
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if (dir == NULL) {
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return -1;
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}
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while ((de = readdir(dir)) != NULL) {
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func(dir_name, de, private);
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}
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closedir(dir);
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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_RDONLY | 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_RDONLY | 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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const uint32_t e2attr_flags_value[] = {
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#ifdef ENABLE_COMPRESSION
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EXT2_COMPRBLK_FL,
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EXT2_DIRTY_FL,
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EXT2_NOCOMPR_FL,
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EXT2_ECOMPR_FL,
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#endif
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EXT2_INDEX_FL,
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EXT2_SECRM_FL,
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EXT2_UNRM_FL,
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EXT2_SYNC_FL,
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EXT2_DIRSYNC_FL,
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EXT2_IMMUTABLE_FL,
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EXT2_APPEND_FL,
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EXT2_NODUMP_FL,
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EXT2_NOATIME_FL,
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EXT2_COMPR_FL,
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EXT3_JOURNAL_DATA_FL,
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EXT2_NOTAIL_FL,
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EXT2_TOPDIR_FL
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};
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const char e2attr_flags_sname[] =
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#ifdef ENABLE_COMPRESSION
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"BZXE"
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#endif
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"I"
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"suSDiadAcjtT";
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static const char e2attr_flags_lname[] =
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#ifdef ENABLE_COMPRESSION
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"Compressed_File" "\0"
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"Compressed_Dirty_File" "\0"
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"Compression_Raw_Access" "\0"
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"Compression_Error" "\0"
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#endif
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"Indexed_directory" "\0"
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"Secure_Deletion" "\0"
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"Undelete" "\0"
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"Synchronous_Updates" "\0"
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"Synchronous_Directory_Updates" "\0"
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"Immutable" "\0"
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"Append_Only" "\0"
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"No_Dump" "\0"
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"No_Atime" "\0"
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"Compression_Requested" "\0"
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"Journaled_Data" "\0"
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"No_Tailmerging" "\0"
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"Top_of_Directory_Hierarchies" "\0"
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/* Another trailing NUL is added by compiler */;
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void print_e2flags(FILE *f, unsigned long flags, unsigned options)
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{
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const uint32_t *fv;
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const char *fn;
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fv = e2attr_flags_value;
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if (options & PFOPT_LONG) {
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int first = 1;
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fn = e2attr_flags_lname;
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do {
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if (flags & *fv) {
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if (!first)
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fputs(", ", f);
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fputs(fn, f);
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first = 0;
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}
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fv++;
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fn += strlen(fn) + 1;
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} while (*fn);
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if (first)
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fputs("---", f);
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} else {
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fn = e2attr_flags_sname;
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do {
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char c = '-';
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if (flags & *fv)
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c = *fn;
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fputc(c, f);
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fv++;
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fn++;
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} while (*fn);
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}
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}
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