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(main): Check for incompatible options. -R --dereference

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requires either -H or -L, and -R -h requires -P.  If -H, specify
FTS_PHYSICAL as well as FTS_COMFOLLOW; this is faster.  Make this
file as much like chown.c as possible.
This commit is contained in:
Jim Meyering
2004-06-08 13:40:00 +00:00
parent 5d13dbcb1e
commit 5e1dd2ecb5
1 changed files with 33 additions and 5 deletions
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src/chgrp.c
+33 -5
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@@ -169,10 +169,16 @@ int
main (int argc, char **argv)
{
gid_t gid;
/* Bit flags that control how fts works. */
int bit_flags = FTS_PHYSICAL;
/* 1 if --dereference, 0 if --no-dereference, -1 if neither has been
specified. */
int dereference = -1;
struct Chown_option chopt;
int fail = 0;
int fail;
int optc;
initialize_main (&argc, &argv);
@@ -194,7 +200,7 @@ main (int argc, char **argv)
break;
case 'H': /* Traverse command-line symlinks-to-directories. */
bit_flags = FTS_COMFOLLOW;
bit_flags = FTS_COMFOLLOW | FTS_PHYSICAL;
break;
case 'L': /* Traverse all symlinks-to-directories. */
@@ -206,12 +212,12 @@ main (int argc, char **argv)
break;
case 'h': /* --no-dereference: affect symlinks */
chopt.affect_symlink_referent = false;
dereference = 0;
break;
case DEREFERENCE_OPTION: /* --dereference: affect the referent
of each symlink */
chopt.affect_symlink_referent = true;
dereference = 1;
break;
case REFERENCE_FILE_OPTION:
@@ -241,6 +247,28 @@ main (int argc, char **argv)
}
}
if (chopt.recurse)
{
if (bit_flags == FTS_PHYSICAL)
{
if (dereference == 1)
error (EXIT_FAILURE, 0,
_("-R --dereference requires either -H or -L"));
chopt.affect_symlink_referent = false;
}
else
{
if (dereference == 0)
error (EXIT_FAILURE, 0, _("-R -h requires -P"));
chopt.affect_symlink_referent = true;
}
}
else
{
bit_flags = FTS_PHYSICAL;
chopt.affect_symlink_referent = (dereference != 0);
}
if (argc - optind + (reference_file ? 1 : 0) <= 1)
{
error (0, 0, _("too few arguments"));
@@ -254,8 +282,8 @@ main (int argc, char **argv)
error (EXIT_FAILURE, errno, _("failed to get attributes of %s"),
quote (reference_file));
chopt.group_name = gid_to_name (ref_stats.st_gid);
gid = ref_stats.st_gid;
chopt.group_name = gid_to_name (ref_stats.st_gid);
}
else
{