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Move lsattr/chattr commands into separate file, we need to add some more options here soon for IRIX so these are getting enough code to warrant separate sources.  No functional change.
Merge of xfs-cmds-melb:slinx:19483a by kenmcd.

/*
 * Copyright (c) 2003-2004 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */

#include <xfs/libxfs.h>
#include "command.h"
#include "input.h"
#include "init.h"
#include "io.h"

static cmdinfo_t chattr_cmd;
static cmdinfo_t lsattr_cmd;

#define CHATTR_XFLAG_LIST	"riasAdtPn"

static struct xflags {
	uint	flag;
	char	*shortname;
	char	*longname;
} xflags[] = {
	{ XFS_XFLAG_REALTIME,	"r", "realtime" },
	{ XFS_XFLAG_PREALLOC,	"p", "prealloc" },
	{ XFS_XFLAG_IMMUTABLE,	"i", "immutable" },
	{ XFS_XFLAG_APPEND,	"a", "append-only" },
	{ XFS_XFLAG_SYNC,	"s", "sync" },
	{ XFS_XFLAG_NOATIME,	"A", "no-atime" },
	{ XFS_XFLAG_NODUMP,	"d", "no-dump" },
	{ XFS_XFLAG_RTINHERIT,	"t", "rt-inherit" },
	{ XFS_XFLAG_PROJINHERIT,"P", "proj-inherit" },
	{ XFS_XFLAG_NOSYMLINKS,	"n", "nosymlinks" },
	{ 0, NULL, NULL }
};

static void
lsattr_help(void)
{
	printf(_(
"\n"
" displays the set of extended inode flags associated with the current file\n"
"\n"
" Each individual flag is displayed as a single character, in this order:\n"
" r -- file data is stored in the realtime section\n"
" p -- file has preallocated extents (cannot be changed using chattr)\n"
" i -- immutable, file cannot be modified\n"
" a -- append-only, file can only be appended to\n"
" s -- all updates are synchronous\n"
" A -- the access time is not updated for this inode\n"
" d -- do not include this file in a dump of the filesystem\n"
" t -- child created in this directory has realtime bit set by default\n"
" P -- child created in this directory has parents project ID by default\n"
" n -- symbolic links cannot be created in this directory\n"
"\n"
" Options:\n"
" -a -- show all flags which can be set alongside those which are set\n"
" -v -- verbose mode; show long names of flags, not single characters\n"
"\n"));
}

static void
chattr_help(void)
{
	printf(_(
"\n"
" modifies the set of extended inode flags associated with the current file\n"
"\n"
" Examples:\n"
" 'chattr +a' - sets the append-only flag\n"
" 'chattr -a' - clears the append-only flag\n"
"\n"
" +/-r -- set/clear the realtime flag\n"
" +/-i -- set/clear the immutable flag\n"
" +/-a -- set/clear the append-only flag\n"
" +/-s -- set/clear the sync flag\n"
" +/-A -- set/clear the no-atime flag\n"
" +/-d -- set/clear the no-dump flag\n"
" +/-t -- set/clear the realtime inheritance flag\n"
" +/-P -- set/clear the project ID inheritance flag\n"
" +/-n -- set/clear the no-symbolic-links flag\n"
" Note1: user must have certain capabilities to modify immutable/append-only.\n"
" Note2: immutable/append-only files cannot be deleted; removing these files\n"
"        requires the immutable/append-only flag to be cleared first.\n"
" Note3: the realtime flag can only be set if the filesystem has a realtime\n"
"        section, and the (regular) file must be empty when the flag is set.\n"
"\n"));
}

void
printxattr(
	uint		flags,
	int		verbose,
	int		dofname,
	const char	*fname,
	int		dobraces,
	int		doeol)
{
	struct xflags	*p;
	int		first = 1;

	if (dobraces)
		fputs("[", stdout);
	for (p = xflags; p->flag; p++) {
		if (flags & p->flag) {
			if (verbose) {
				if (first)
					first = 0;
				else
					fputs(", ", stdout);
				fputs(p->longname, stdout);
			} else {
				fputs(p->shortname, stdout);
			}
		} else if (!verbose) {
			fputs("-", stdout);
		}
	}
	if (dobraces)
		fputs("]", stdout);
	if (dofname)
		printf(" %s ", fname);
	if (doeol)
		fputs("\n", stdout);
}

static int
lsattr_f(
	int		argc,
	char		**argv)
{
	struct fsxattr	fsx;
	char		*name = file->name;
	int		c, aflag = 0, vflag = 0;

	while ((c = getopt(argc, argv, "av")) != EOF) {
		switch (c) {
		case 'a':
			aflag = 1;
			vflag = 0;
			break;
		case 'v':
			aflag = 0;
			vflag = 1;
			break;
		default:
			printf(_("invalid lsattr argument -- '%c'\n"), c);
			return 0;
		}
	}

	if ((xfsctl(name, file->fd, XFS_IOC_FSGETXATTR, &fsx)) < 0) {
		perror("XFS_IOC_FSGETXATTR");
	} else {
		printxattr(fsx.fsx_xflags, vflag, !aflag, name, vflag, !aflag);
		if (aflag) {
			fputs("/", stdout);
			printxattr(-1, 0, 1, name, 0, 1);
		}
	}
	return 0;
}

static int
chattr_f(
	int		argc,
	char		**argv)
{
	struct fsxattr	attr;
	struct xflags	*p;
	unsigned int	i = 0;
	char		*c, *name = file->name;

	if (xfsctl(name, file->fd, XFS_IOC_FSGETXATTR, &attr) < 0) {
		perror("XFS_IOC_FSGETXATTR");
		return 0;
	}
	while (++i < argc) {
		if (argv[i][0] == '+') {
			for (c = &argv[i][1]; *c; c++) {
				for (p = xflags; p->flag; p++) {
					if (strncmp(p->shortname, c, 1) == 0) {
						attr.fsx_xflags |= p->flag;
						break;
					}
				}
				if (!p->flag) {
					fprintf(stderr, _("%s: unknown flag\n"),
						progname);
					return 0;
				}
			}
		} else if (argv[i][0] == '-') {
			for (c = &argv[i][1]; *c; c++) {
				for (p = xflags; p->flag; p++) {
					if (strncmp(p->shortname, c, 1) == 0) {
						attr.fsx_xflags &= ~p->flag;
						break;
					}
				}
				if (!p->flag) {
					fprintf(stderr, _("%s: unknown flag\n"),
						progname);
					return 0;
				}
			}
		} else {
			fprintf(stderr, _("%s: bad chattr command, not +/-X\n"),
				progname);
			return 0;
		}
	}
	if (xfsctl(name, file->fd, XFS_IOC_FSSETXATTR, &attr) < 0)
		perror("XFS_IOC_FSSETXATTR");
	return 0;
}

void
attr_init(void)
{
	chattr_cmd.name = _("chattr");
	chattr_cmd.cfunc = chattr_f;
	chattr_cmd.args = _("[+/-"CHATTR_XFLAG_LIST"]");
	chattr_cmd.argmin = 1;
	chattr_cmd.argmax = -1;
	chattr_cmd.flags = CMD_NOMAP_OK;
	chattr_cmd.oneline =
		_("change extended inode flags on the currently open file");
	chattr_cmd.help = chattr_help;

	lsattr_cmd.name = _("lsattr");
	lsattr_cmd.cfunc = lsattr_f;
	lsattr_cmd.args = _("[-a|-v]");
	lsattr_cmd.argmin = 0;
	lsattr_cmd.argmax = 1;
	lsattr_cmd.flags = CMD_NOMAP_OK;
	lsattr_cmd.oneline =
		_("list extended inode flags set on the currently open file");
	lsattr_cmd.help = lsattr_help;

	add_command(&chattr_cmd);
	add_command(&lsattr_cmd);
}