hw/9pfs/9p-util-linux.c

   1 /*
   2  * 9p utilities (Linux Implementation)
   3  *
   4  * Copyright IBM, Corp. 2017
   5  *
   6  * Authors:
   7  *  Greg Kurz <groug@kaod.org>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  */
  12
  13 /*
  14  * Not so fast! You might want to read the 9p developer docs first:
  15  * https://wiki.qemu.org/Documentation/9p
  16  */
  17
  18 #include "qemu/osdep.h"
  19 #include "qemu/xattr.h"
  20 #include "9p-util.h"
  21
  22 ssize_t fgetxattrat_nofollow(int dirfd, const char *filename, const char *name,
  23                              void *value, size_t size)
  24 {
  25     char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
  26     int ret;
  27
  28     ret = lgetxattr(proc_path, name, value, size);
  29     g_free(proc_path);
  30     return ret;
  31 }
  32
  33 ssize_t flistxattrat_nofollow(int dirfd, const char *filename,
  34                               char *list, size_t size)
  35 {
  36     char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
  37     int ret;
  38
  39     ret = llistxattr(proc_path, list, size);
  40     g_free(proc_path);
  41     return ret;
  42 }
  43
  44 ssize_t fremovexattrat_nofollow(int dirfd, const char *filename,
  45                                 const char *name)
  46 {
  47     char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
  48     int ret;
  49
  50     ret = lremovexattr(proc_path, name);
  51     g_free(proc_path);
  52     return ret;
  53 }
  54
  55 int fsetxattrat_nofollow(int dirfd, const char *filename, const char *name,
  56                          void *value, size_t size, int flags)
  57 {
  58     char *proc_path = g_strdup_printf("/proc/self/fd/%d/%s", dirfd, filename);
  59     int ret;
  60
  61     ret = lsetxattr(proc_path, name, value, size, flags);
  62     g_free(proc_path);
  63     return ret;
  64
  65 }
  66
  67 int qemu_mknodat(int dirfd, const char *filename, mode_t mode, dev_t dev)
  68 {
  69     return mknodat(dirfd, filename, mode, dev);
  70 }