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ChangeLog, chattr.1.in, chattr.c:
chattr.c (decode_arg, get_flag): Use a table-driven method for decoding the ext2 file flags character options. Add support for the journaled data flag. chattr.1.in: Document the -j/+j/=j flag.
This commit is contained in:
Theodore Ts'o
parent
2fe1efe2e5
commit
9a71884968
@ -1,3 +1,11 @@
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2000-12-31 <tytso@snap.thunk.org>
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* chattr.c (decode_arg, get_flag): Use a table-driven method for
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decoding the ext2 file flags character options. Add
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support for the journaled data flag.
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* chattr.1.in: Document the -j/+j/=j flag.
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2000-12-30 <tytso@snap.thunk.org>
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* mke2fs.8.in: Minor clarity edit.
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@ -25,9 +25,9 @@ The operator `+' causes the selected attributes to be added to the
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existing attributes of the files; `-' causes them to be removed; and
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`=' causes them to be the only attributes that the files have.
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.PP
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The letters `ASacdisu' select the new attributes for the files:
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The letters `ASacdijsu' select the new attributes for the files:
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don't update atime (A), synchronous updates (S), append only (a),
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compressed (c), immutable (i), no dump (d),
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compressed (c), no dump (d), immutable (i), data journalling (j),
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secure deletion (s), and undeletable (u).
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.SH OPTIONS
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.TP
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@ -61,6 +61,12 @@ A file with the `i' attribute cannot be modified: it cannot be deleted or
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renamed, no link can be created to this file and no data can be written
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to the file. Only the superuser can set or clear this attribute.
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.PP
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A file with the `j' attribute has all of its data written to the ext3
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journal before being written to the file itself, if the filesystem is
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mounted with the "data=ordered" or "data=writeback" options. When the
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filesystem is mounted with the "data=journalled" option all file data
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is already journalled and this attribute has no effect.
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.PP
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When a file with the `s' attribute set is deleted, its blocks are zeroed and
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written back to the disk.
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.PP
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@ -76,9 +82,10 @@ This allows the user to ask for its undeletion.
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was written by Remy Card <Remy.Card@linux.org>.
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.SH BUGS AND LIMITATIONS
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As of Linux 2.2, the `c', 's', and `u' attribute are not honored
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by the kernel code.
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by the kernel filesystem code. These attributes will be implemented
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in a future ext2 fs version.
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.PP
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These attributes will be implemented in a future ext2 fs version.
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The `j' option is only useful if the filesystem is mounted as ext3.
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.SH AVAILABILITY
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.B chattr
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is part of the e2fsprogs package and is available for anonymous
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180
misc/chattr.c
180
misc/chattr.c
@ -48,15 +48,15 @@
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static const char * program_name = "chattr";
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static int add = 0;
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static int rem = 0;
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static int set = 0;
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static int set_version = 0;
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static int add;
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static int rem;
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static int set;
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static int set_version;
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static unsigned long version;
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static int recursive = 0;
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static int verbose = 0;
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static int recursive;
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static int verbose;
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static unsigned long af;
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static unsigned long rf;
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@ -68,142 +68,92 @@ static void fatal_error(const char * fmt_string, int errcode)
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exit (errcode);
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}
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#define usage() fatal_error(_("usage: %s [-RV] [-+=AacdisSu] [-v version] files...\n"), \
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#define usage() fatal_error(_("usage: %s [-RV] [-+=AacdijsSu] [-v version] files...\n"), \
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1)
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struct flags_char {
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unsigned long flag;
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char optchar;
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};
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static const struct flags_char flags_array[] = {
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{ EXT2_NOATIME_FL, 'A' },
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{ EXT2_SYNC_FL, 'S' },
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{ EXT2_APPEND_FL, 'a' },
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{ EXT2_COMPR_FL, 'c' },
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{ EXT2_NODUMP_FL, 'd' },
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{ EXT2_IMMUTABLE_FL, 'i' },
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{ EXT3_JOURNAL_DATA_FL, 'j' },
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{ EXT2_SECRM_FL, 's' },
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{ EXT2_UNRM_FL, 'u' },
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{ 0, 0 }
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};
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static unsigned long get_flag(char c)
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{
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const struct flags_char *fp;
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for (fp = flags_array; fp->flag != 0; fp++) {
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if (fp->optchar == c)
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return fp->flag;
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}
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return 0;
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}
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static int decode_arg (int * i, int argc, char ** argv)
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{
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char * p;
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char * tmp;
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unsigned long fl;
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switch (argv[*i][0])
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{
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case '-':
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for (p = &argv[*i][1]; *p; p++)
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switch (*p)
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{
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case 'A':
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rf |= EXT2_NOATIME_FL;
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rem = 1;
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break;
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case 'R':
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for (p = &argv[*i][1]; *p; p++) {
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if (*p == 'R') {
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recursive = 1;
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break;
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case 'S':
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rf |= EXT2_SYNC_FL;
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rem = 1;
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break;
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case 'V':
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continue;
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}
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if (*p == 'V') {
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verbose = 1;
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break;
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case 'a':
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rf |= EXT2_APPEND_FL;
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rem = 1;
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break;
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case 'c':
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rf |= EXT2_COMPR_FL;
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rem = 1;
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break;
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case 'd':
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rf |= EXT2_NODUMP_FL;
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rem = 1;
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break;
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case 'i':
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rf |= EXT2_IMMUTABLE_FL;
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rem = 1;
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break;
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case 's':
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rf |= EXT2_SECRM_FL;
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rem = 1;
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break;
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case 'u':
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rf |= EXT2_UNRM_FL;
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rem = 1;
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break;
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case 'v':
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continue;
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}
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if (*p == 'v') {
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(*i)++;
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if (*i >= argc)
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usage ();
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version = strtol (argv[*i], &tmp, 0);
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if (*tmp)
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{
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if (*tmp) {
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com_err (program_name, 0,
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_("bad version - %s\n"), argv[*i]);
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_("bad version - %s\n"),
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argv[*i]);
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usage ();
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}
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set_version = 1;
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break;
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default:
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fprintf (stderr, _("%s: Unrecognized argument: %c\n"),
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program_name, *p);
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usage ();
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continue;
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}
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if ((fl = get_flag(*p)) == 0)
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usage();
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rf |= fl;
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rem = 1;
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}
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break;
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case '+':
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add = 1;
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for (p = &argv[*i][1]; *p; p++)
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switch (*p)
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{
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case 'A':
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af |= EXT2_NOATIME_FL;
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break;
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case 'S':
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af |= EXT2_SYNC_FL;
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break;
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case 'a':
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af |= EXT2_APPEND_FL;
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break;
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case 'c':
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af |= EXT2_COMPR_FL;
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break;
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case 'd':
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af |= EXT2_NODUMP_FL;
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break;
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case 'i':
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af |= EXT2_IMMUTABLE_FL;
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break;
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case 's':
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af |= EXT2_SECRM_FL;
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break;
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case 'u':
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af |= EXT2_UNRM_FL;
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break;
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default:
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usage ();
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}
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for (p = &argv[*i][1]; *p; p++) {
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if ((fl = get_flag(*p)) == 0)
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usage();
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af |= fl;
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}
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break;
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case '=':
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set = 1;
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for (p = &argv[*i][1]; *p; p++)
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switch (*p)
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{
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case 'A':
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sf |= EXT2_NOATIME_FL;
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break;
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case 'S':
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sf |= EXT2_SYNC_FL;
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break;
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case 'a':
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sf |= EXT2_APPEND_FL;
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break;
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case 'c':
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sf |= EXT2_COMPR_FL;
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break;
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case 'd':
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sf |= EXT2_NODUMP_FL;
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break;
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case 'i':
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sf |= EXT2_IMMUTABLE_FL;
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break;
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case 's':
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sf |= EXT2_SECRM_FL;
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break;
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case 'u':
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sf |= EXT2_UNRM_FL;
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break;
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default:
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usage ();
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}
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for (p = &argv[*i][1]; *p; p++) {
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if ((fl = get_flag(*p)) == 0)
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usage();
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sf |= fl;
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}
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break;
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default:
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return EOF;
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