LXR busybox/e2fsprogs/old_e2fsprogs/e2p/fgetsetflags.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * fgetflags.c          - Get a file flags on an ext2 file system
   4 * fsetflags.c          - Set a file flags on an ext2 file system
   5 *
   6 * Copyright (C) 1993, 1994  Remy Card <card@masi.ibp.fr>
   7 *                           Laboratoire MASI, Institut Blaise Pascal
   8 *                           Universite Pierre et Marie Curie (Paris VI)
   9 *
  10 * This file can be redistributed under the terms of the GNU Library General
  11 * Public License
  12 */
  13
  14/*
  15 * History:
  16 * 93/10/30     - Creation
  17 */
  18
  19#ifdef HAVE_ERRNO_H
  20#include <errno.h>
  21#endif
  22#ifdef HAVE_UNISTD_H
  23#include <unistd.h>
  24#endif
  25#include <sys/types.h>
  26#include <sys/stat.h>
  27#ifdef HAVE_EXT2_IOCTLS
  28#include <fcntl.h>
  29#include <sys/ioctl.h>
  30#endif
  31
  32#include "e2p.h"
  33
  34#ifdef O_LARGEFILE
  35#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK|O_LARGEFILE)
  36#else
  37#define OPEN_FLAGS (O_RDONLY|O_NONBLOCK)
  38#endif
  39
  40int fgetsetflags (const char * name, unsigned long * get_flags, unsigned long set_flags)
  41{
  42#ifdef HAVE_EXT2_IOCTLS
  43        struct stat buf;
  44        int fd, r, f, save_errno = 0;
  45
  46        if (!stat(name, &buf) &&
  47            !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode)) {
  48                goto notsupp;
  49        }
  50        fd = open (name, OPEN_FLAGS);
  51        if (fd == -1)
  52                return -1;
  53        if (!get_flags) {
  54                f = (int) set_flags;
  55                r = ioctl (fd, EXT2_IOC_SETFLAGS, &f);
  56        } else {
  57                r = ioctl (fd, EXT2_IOC_GETFLAGS, &f);
  58                *get_flags = f;
  59        }
  60        if (r == -1)
  61                save_errno = errno;
  62        close (fd);
  63        if (save_errno)
  64                errno = save_errno;
  65        return r;
  66notsupp:
  67#endif /* HAVE_EXT2_IOCTLS */
  68        errno = EOPNOTSUPP;
  69        return -1;
  70}
  71