1  /*
       2   * Copyright (c) 2002-2005 Roland McGrath <roland@redhat.com>
       3   * Copyright (c) 2004 Ulrich Drepper <drepper@redhat.com>
       4   * Copyright (c) 2005-2021 Dmitry V. Levin <ldv@strace.io>
       5   * All rights reserved.
       6   *
       7   * SPDX-License-Identifier: LGPL-2.1-or-later
       8   */
       9  
      10  #include "defs.h"
      11  
      12  #ifdef HAVE_SYS_XATTR_H
      13  # include <sys/xattr.h>
      14  #endif
      15  
      16  #include "xlat/xattrflags.h"
      17  
      18  #ifndef XATTR_SIZE_MAX
      19  # define XATTR_SIZE_MAX 65536
      20  #endif
      21  
      22  static void
      23  print_xattr_val(struct tcb *const tcp,
      24  		const kernel_ulong_t addr,
      25  		const kernel_ulong_t insize,
      26  		const kernel_ulong_t size)
      27  {
      28  	/* value */
      29  	if (size > XATTR_SIZE_MAX)
      30  		printaddr(addr);
      31  	else
      32  		printstr_ex(tcp, addr, size, QUOTE_OMIT_TRAILING_0);
      33  	tprint_arg_next();
      34  
      35  	/* size */
      36  	PRINT_VAL_U(insize);
      37  }
      38  
      39  SYS_FUNC(setxattr)
      40  {
      41  	/* pathname */
      42  	printpath(tcp, tcp->u_arg[0]);
      43  	tprint_arg_next();
      44  
      45  	/* name */
      46  	printstr(tcp, tcp->u_arg[1]);
      47  	tprint_arg_next();
      48  
      49  	print_xattr_val(tcp, tcp->u_arg[2], tcp->u_arg[3], tcp->u_arg[3]);
      50  	tprint_arg_next();
      51  
      52  	/* flags */
      53  	printflags(xattrflags, tcp->u_arg[4], "XATTR_???");
      54  	return RVAL_DECODED;
      55  }
      56  
      57  SYS_FUNC(fsetxattr)
      58  {
      59  	/* fd */
      60  	printfd(tcp, tcp->u_arg[0]);
      61  	tprint_arg_next();
      62  
      63  	/* name */
      64  	printstr(tcp, tcp->u_arg[1]);
      65  	tprint_arg_next();
      66  
      67  	print_xattr_val(tcp, tcp->u_arg[2], tcp->u_arg[3], tcp->u_arg[3]);
      68  	tprint_arg_next();
      69  
      70  	/* flags */
      71  	printflags(xattrflags, tcp->u_arg[4], "XATTR_???");
      72  	return RVAL_DECODED;
      73  }
      74  
      75  SYS_FUNC(getxattr)
      76  {
      77  	if (entering(tcp)) {
      78  		/* pathname */
      79  		printpath(tcp, tcp->u_arg[0]);
      80  		tprint_arg_next();
      81  
      82  		/* name */
      83  		printstr(tcp, tcp->u_arg[1]);
      84  		tprint_arg_next();
      85  	} else {
      86  		print_xattr_val(tcp, tcp->u_arg[2], tcp->u_arg[3], tcp->u_rval);
      87  	}
      88  	return 0;
      89  }
      90  
      91  SYS_FUNC(fgetxattr)
      92  {
      93  	if (entering(tcp)) {
      94  		/* fd */
      95  		printfd(tcp, tcp->u_arg[0]);
      96  		tprint_arg_next();
      97  
      98  		/* name */
      99  		printstr(tcp, tcp->u_arg[1]);
     100  		tprint_arg_next();
     101  	} else {
     102  		print_xattr_val(tcp, tcp->u_arg[2], tcp->u_arg[3], tcp->u_rval);
     103  	}
     104  	return 0;
     105  }
     106  
     107  static void
     108  print_xattr_list(struct tcb *const tcp, const kernel_ulong_t addr,
     109  		 const kernel_ulong_t size)
     110  {
     111  	/* list */
     112  	if (!size || syserror(tcp)) {
     113  		printaddr(addr);
     114  	} else {
     115  		printstrn(tcp, addr, tcp->u_rval);
     116  	}
     117  	tprint_arg_next();
     118  
     119  	/* size */
     120  	PRINT_VAL_U(size);
     121  }
     122  
     123  SYS_FUNC(listxattr)
     124  {
     125  	if (entering(tcp)) {
     126  		/* pathname */
     127  		printpath(tcp, tcp->u_arg[0]);
     128  		tprint_arg_next();
     129  	} else {
     130  		print_xattr_list(tcp, tcp->u_arg[1], tcp->u_arg[2]);
     131  	}
     132  	return 0;
     133  }
     134  
     135  SYS_FUNC(flistxattr)
     136  {
     137  	if (entering(tcp)) {
     138  		/* fd */
     139  		printfd(tcp, tcp->u_arg[0]);
     140  		tprint_arg_next();
     141  	} else {
     142  		print_xattr_list(tcp, tcp->u_arg[1], tcp->u_arg[2]);
     143  	}
     144  	return 0;
     145  }
     146  
     147  SYS_FUNC(removexattr)
     148  {
     149  	/* pathname */
     150  	printpath(tcp, tcp->u_arg[0]);
     151  	tprint_arg_next();
     152  
     153  	/* name */
     154  	printstr(tcp, tcp->u_arg[1]);
     155  	return RVAL_DECODED;
     156  }
     157  
     158  SYS_FUNC(fremovexattr)
     159  {
     160  	/* fd */
     161  	printfd(tcp, tcp->u_arg[0]);
     162  	tprint_arg_next();
     163  
     164  	/* name */
     165  	printstr(tcp, tcp->u_arg[1]);
     166  	return RVAL_DECODED;
     167  }