granicus.if.org Git - strace/blob - xattr.c

   1 #include "defs.h"
   2
   3 #ifdef HAVE_LINUX_XATTR_H
   4 # include <linux/xattr.h>
   5 #else
   6 # define XATTR_CREATE 1
   7 # define XATTR_REPLACE 2
   8 #endif
   9
  10 #include "xlat/xattrflags.h"
  11
  12 static void
  13 print_xattr_val(struct tcb *tcp, int failed,
  14                 unsigned long arg,
  15                 unsigned long insize,
  16                 unsigned long size)
  17 {
  18         char *buf;
  19         unsigned int len;
  20
  21         if (insize == 0)
  22                 goto failed;
  23
  24         len = size;
  25         if (size != (unsigned long) len)
  26                 goto failed;
  27
  28         if (!len) {
  29                 tprintf(", \"\", %ld", insize);
  30                 return;
  31         }
  32
  33         buf = malloc(len);
  34         if (!buf)
  35                 goto failed;
  36
  37         if (umoven(tcp, arg, len, buf) < 0) {
  38                 free(buf);
  39                 goto failed;
  40         }
  41
  42         /* Don't print terminating NUL if there is one. */
  43         if (buf[len - 1] == '\0')
  44                 --len;
  45
  46         tprints(", ");
  47         print_quoted_string(buf, len, 0);
  48         tprintf(", %ld", insize);
  49
  50         free(buf);
  51         return;
  52
  53 failed:
  54         tprintf(", 0x%lx, %ld", arg, insize);
  55 }
  56
  57 SYS_FUNC(setxattr)
  58 {
  59         if (entering(tcp)) {
  60                 printpath(tcp, tcp->u_arg[0]);
  61                 tprints(", ");
  62                 printstr(tcp, tcp->u_arg[1], -1);
  63                 print_xattr_val(tcp, 0, tcp->u_arg[2], tcp->u_arg[3], tcp->u_arg[3]);
  64                 tprints(", ");
  65                 printflags(xattrflags, tcp->u_arg[4], "XATTR_???");
  66         }
  67         return 0;
  68 }
  69
  70 SYS_FUNC(fsetxattr)
  71 {
  72         if (entering(tcp)) {
  73                 printfd(tcp, tcp->u_arg[0]);
  74                 tprints(", ");
  75                 printstr(tcp, tcp->u_arg[1], -1);
  76                 print_xattr_val(tcp, 0, tcp->u_arg[2], tcp->u_arg[3], tcp->u_arg[3]);
  77                 tprints(", ");
  78                 printflags(xattrflags, tcp->u_arg[4], "XATTR_???");
  79         }
  80         return 0;
  81 }
  82
  83 SYS_FUNC(getxattr)
  84 {
  85         if (entering(tcp)) {
  86                 printpath(tcp, tcp->u_arg[0]);
  87                 tprints(", ");
  88                 printstr(tcp, tcp->u_arg[1], -1);
  89         } else {
  90                 print_xattr_val(tcp, syserror(tcp), tcp->u_arg[2], tcp->u_arg[3],
  91                                 tcp->u_rval);
  92         }
  93         return 0;
  94 }
  95
  96 SYS_FUNC(fgetxattr)
  97 {
  98         if (entering(tcp)) {
  99                 printfd(tcp, tcp->u_arg[0]);
 100                 tprints(", ");
 101                 printstr(tcp, tcp->u_arg[1], -1);
 102         } else {
 103                 print_xattr_val(tcp, syserror(tcp), tcp->u_arg[2], tcp->u_arg[3],
 104                                 tcp->u_rval);
 105         }
 106         return 0;
 107 }
 108
 109 static void
 110 print_xattr_list(struct tcb *tcp, unsigned long addr, unsigned long size)
 111 {
 112         if (syserror(tcp)) {
 113                 tprintf("%#lx", addr);
 114         } else {
 115                 if (!addr) {
 116                         tprints("NULL");
 117                 } else {
 118                         unsigned long len =
 119                                 (size < (unsigned long) tcp->u_rval) ?
 120                                         size : (unsigned long) tcp->u_rval;
 121                         printstr(tcp, addr, len);
 122                 }
 123         }
 124         tprintf(", %lu", size);
 125 }
 126
 127 SYS_FUNC(listxattr)
 128 {
 129         if (entering(tcp)) {
 130                 printpath(tcp, tcp->u_arg[0]);
 131                 tprints(", ");
 132         } else {
 133                 print_xattr_list(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 134         }
 135         return 0;
 136 }
 137
 138 SYS_FUNC(flistxattr)
 139 {
 140         if (entering(tcp)) {
 141                 printfd(tcp, tcp->u_arg[0]);
 142                 tprints(", ");
 143         } else {
 144                 print_xattr_list(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 145         }
 146         return 0;
 147 }
 148
 149 SYS_FUNC(removexattr)
 150 {
 151         if (entering(tcp)) {
 152                 printpath(tcp, tcp->u_arg[0]);
 153                 tprints(", ");
 154                 printstr(tcp, tcp->u_arg[1], -1);
 155         }
 156         return 0;
 157 }
 158
 159 SYS_FUNC(fremovexattr)
 160 {
 161         if (entering(tcp)) {
 162                 printfd(tcp, tcp->u_arg[0]);
 163                 tprints(", ");
 164                 printstr(tcp, tcp->u_arg[1], -1);
 165         }
 166         return 0;
 167 }