LXR qemu/hw/9pfs/9p-util.c

   1/*
   2 * 9p utilities
   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
  22ssize_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
  33ssize_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
  44ssize_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
  55int 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