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https://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
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9e51eca782
message.c (safe_print): New function which prints strings, converting non-printable characters using the '^' and M-notation. This function is now used to print directory name entries and pathnames. ChangeLog: Update for release of E2fsprogs 1.14.
412 lines
8.1 KiB
C
412 lines
8.1 KiB
C
/*
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* message.c --- print e2fsck messages (with compression)
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*
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* Copyright 1996, 1997 by Theodore Ts'o
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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*
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* print_e2fsck_message() prints a message to the user, using
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* compression techniques and expansions of abbreviations.
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*
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* The following % expansions are supported:
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*
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* %b <blk> block number
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* %B <blkcount> integer
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* %c <blk2> block number
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* %di <dirent>->ino inode number
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* %dn <dirent>->name string
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* %dr <dirent>->rec_len
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* %dl <dirent>->name_len
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* %D <dir> inode number
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* %g <group> integer
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* %i <ino> inode number
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* %Is <inode> -> i_size
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* %Ib <inode> -> i_blocks
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* %Il <inode> -> i_links_count
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* %Im <inode> -> i_mode
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* %IM <inode> -> i_mtime
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* %IF <inode> -> i_faddr
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* %If <inode> -> i_file_acl
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* %Id <inode> -> i_dir_acl
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* %j <ino2> inode number
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* %m <com_err error message>
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* %N <num>
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* %p ext2fs_get_pathname of directory <ino>
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* %P ext2fs_get_pathname of <dirent>->ino with <ino2> as
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* the containing directory. (If dirent is NULL
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* then return the pathname of directory <ino2>)
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* %q ext2fs_get_pathname of directory <dir>
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* %Q ext2fs_get_pathname of directory <ino> with <dir> as
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* the containing directory.
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* %s <str> miscellaneous string
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* %S backup superblock
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*
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* The following '@' expansions are supported:
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*
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* @A error allocating
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* @b block
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* @B bitmap
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* @C conflicts with some other fs block
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* @i inode
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* @I illegal
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* @D deleted
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* @d directory
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* @e entry
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* @E Entry '%Dn' in %p (%i)
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* @f filesystem
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* @F for @i %i (%Q) is
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* @g group
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* @l lost+found
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* @L is a link
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* @u unattached
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* @r root inode
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* @s should be
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* @S superblock
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* @z zero-length
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#include <termios.h>
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#include "e2fsck.h"
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#include "problem.h"
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#ifdef __GNUC__
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#define _INLINE_ __inline__
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#else
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#define _INLINE_
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#endif
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/*
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* This structure defines the abbreviations used by the text strings
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* below. The first character in the string is the index letter. An
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* abbreviation of the form '@<i>' is expanded by looking up the index
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* letter <i> in the table below.
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*/
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static const char *abbrevs[] = {
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"Aerror allocating",
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"bblock",
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"Bbitmap",
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"Cconflicts with some other fs @b",
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"iinode",
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"Iillegal",
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"Ddeleted",
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"ddirectory",
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"eentry",
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"E@e '%Dn' in %p (%i)",
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"ffilesystem",
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"Ffor @i %i (%Q) is",
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"ggroup",
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"llost+found",
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"Lis a link",
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"uunattached",
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"rroot @i",
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"sshould be",
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"Ssuper@b",
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"zzero-length",
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"@@",
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0
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};
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/*
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* Give more user friendly names to the "special" inodes.
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*/
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#define num_special_inodes 7
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static const char *special_inode_name[] =
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{
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"<The NULL inode>", /* 0 */
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"<The bad blocks inode>", /* 1 */
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"/", /* 2 */
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"<The ACL index inode>", /* 3 */
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"<The ACL data inode>", /* 4 */
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"<The boot loader inode>", /* 5 */
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"<The undelete directory inode>" /* 6 */
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};
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/*
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* This function does "safe" printing. It will convert non-printable
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* ASCII characters using '^' and M- notation.
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*/
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static void safe_print(const unsigned char *cp, int len)
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{
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unsigned char ch;
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if (len < 0)
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len = strlen(cp);
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while (len--) {
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ch = *cp++;
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if (ch > 128) {
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fputs("M-", stdout);
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ch -= 128;
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}
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if (ch < 32) {
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fputc('^', stdout);
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ch += 32;
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}
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fputc(ch, stdout);
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}
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}
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/*
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* This function prints a pathname, using the ext2fs_get_pathname
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* function
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*/
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static void print_pathname(ext2_filsys fs, ino_t dir, ino_t ino)
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{
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errcode_t retval;
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char *path;
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if (!dir && (ino < num_special_inodes)) {
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fputs(special_inode_name[ino], stdout);
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return;
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}
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retval = ext2fs_get_pathname(fs, dir, ino, &path);
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if (retval)
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fputs("???", stdout);
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else {
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safe_print(path, -1);
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ext2fs_free_mem((void **) &path);
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}
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}
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/*
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* This function handles the '@' expansion. We allow recursive
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* expansion; an @ expression can contain further '@' and '%'
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* expressions.
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*/
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static _INLINE_ void expand_at_expression(e2fsck_t ctx, char ch,
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struct problem_context *pctx,
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int *first)
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{
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const char **cpp, *str;
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/* Search for the abbreviation */
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for (cpp = abbrevs; *cpp; cpp++) {
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if (ch == *cpp[0])
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break;
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}
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if (*cpp) {
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str = (*cpp) + 1;
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if (*first && islower(*str)) {
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*first = 0;
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fputc(toupper(*str++), stdout);
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}
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print_e2fsck_message(ctx, str, pctx, *first);
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} else
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printf("@%c", ch);
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}
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/*
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* This function expands '%kX' expressions
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*/
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static _INLINE_ void expand_inode_expression(char ch,
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struct problem_context *ctx)
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{
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struct ext2_inode *inode;
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char * time_str;
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time_t t;
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if (!ctx || !ctx->inode)
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goto no_inode;
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inode = ctx->inode;
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switch (ch) {
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case 's':
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if (LINUX_S_ISDIR(inode->i_mode))
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printf("%u", inode->i_size);
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else {
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#ifdef EXT2_NO_64_TYPE
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if (inode->i_size_high)
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printf("0x%x%08x", inode->i_size_high,
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inode->i_size);
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else
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printf("%u", inode->i_size);
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#else
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printf("%llu", (inode->i_size |
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((__u64) inode->i_size_high << 32)));
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#endif
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}
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break;
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case 'b':
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printf("%u", inode->i_blocks);
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break;
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case 'l':
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printf("%d", inode->i_links_count);
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break;
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case 'm':
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printf("0%o", inode->i_mode);
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break;
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case 'M':
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t = inode->i_mtime;
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time_str = ctime(&t);
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printf("%.24s", time_str);
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break;
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case 'F':
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printf("%u", inode->i_faddr);
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break;
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case 'f':
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printf("%u", inode->i_file_acl);
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break;
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case 'd':
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printf("%u", (LINUX_S_ISDIR(inode->i_mode) ?
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inode->i_dir_acl : 0));
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break;
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default:
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no_inode:
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printf("%%I%c", ch);
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break;
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}
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}
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/*
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* This function expands '%dX' expressions
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*/
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static _INLINE_ void expand_dirent_expression(char ch,
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struct problem_context *ctx)
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{
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struct ext2_dir_entry *dirent;
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int len;
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if (!ctx || !ctx->dirent)
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goto no_dirent;
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dirent = ctx->dirent;
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switch (ch) {
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case 'i':
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printf("%u", dirent->inode);
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break;
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case 'n':
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len = dirent->name_len & 0xFF;
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if (len > EXT2_NAME_LEN)
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len = EXT2_NAME_LEN;
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if (len > dirent->rec_len)
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len = dirent->rec_len;
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safe_print(dirent->name, len);
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break;
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case 'r':
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printf("%u", dirent->rec_len);
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break;
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case 'l':
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printf("%u", dirent->name_len & 0xFF);
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break;
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default:
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no_dirent:
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printf("%%D%c", ch);
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break;
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}
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}
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static _INLINE_ void expand_percent_expression(ext2_filsys fs, char ch,
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struct problem_context *ctx)
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{
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if (!ctx)
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goto no_context;
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switch (ch) {
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case '%':
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fputc('%', stdout);
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break;
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case 'b':
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printf("%u", ctx->blk);
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break;
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case 'B':
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#ifdef EXT2_NO_64_TYPE
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printf("%d", ctx->blkcount);
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#else
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printf("%lld", ctx->blkcount);
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#endif
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break;
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case 'c':
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printf("%u", ctx->blk2);
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break;
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case 'd':
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printf("%lu", ctx->dir);
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break;
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case 'g':
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printf("%d", ctx->group);
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break;
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case 'i':
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printf("%lu", ctx->ino);
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break;
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case 'j':
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printf("%lu", ctx->ino2);
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break;
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case 'm':
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printf("%s", error_message(ctx->errcode));
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break;
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case 'N':
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#ifdef EXT2_NO_64_TYPE
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printf("%u", ctx->num);
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#else
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printf("%llu", ctx->num);
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#endif
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break;
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case 'p':
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print_pathname(fs, ctx->ino, 0);
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break;
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case 'P':
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print_pathname(fs, ctx->ino2,
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ctx->dirent ? ctx->dirent->inode : 0);
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break;
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case 'q':
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print_pathname(fs, ctx->dir, 0);
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break;
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case 'Q':
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print_pathname(fs, ctx->dir, ctx->ino);
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break;
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case 'S':
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printf("%d", get_backup_sb(fs));
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break;
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case 's':
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printf("%s", ctx->str);
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break;
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default:
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no_context:
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printf("%%%c", ch);
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break;
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}
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}
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void print_e2fsck_message(e2fsck_t ctx, const char *msg,
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struct problem_context *pctx, int first)
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{
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ext2_filsys fs = ctx->fs;
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const char * cp;
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int i;
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for (cp = msg; *cp; cp++) {
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if (cp[0] == '@') {
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cp++;
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expand_at_expression(ctx, *cp, pctx, &first);
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} else if (cp[0] == '%' && cp[1] == 'I') {
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cp += 2;
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expand_inode_expression(*cp, pctx);
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} else if (cp[0] == '%' && cp[1] == 'D') {
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cp += 2;
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expand_dirent_expression(*cp, pctx);
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} else if ((cp[0] == '%')) {
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cp++;
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expand_percent_expression(fs, *cp, pctx);
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} else {
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for (i=0; cp[i]; i++)
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if ((cp[i] == '@') || cp[i] == '%')
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break;
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printf("%.*s", i, cp);
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cp += i-1;
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}
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first = 0;
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}
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}
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