Class: File::Stat

Inherits:
Object show all
Includes:
Comparable
Defined in:
file.c,
file.c

Overview

Objects of class File::Stat encapsulate common status information for File objects. The information is recorded at the moment the File::Stat object is created; changes made to the file after that point will not be reflected. File::Stat objects are returned by IO#stat, File::stat, File#lstat, and File::lstat. Many of these methods return platform-specific values, and not all values are meaningful on all systems. See also Kernel#test.

Instance Method Summary collapse

Methods included from Comparable

#<, #<=, #==, #>, #>=, #between?

Constructor Details

#File::Stat.new(file_name) ⇒ Object

Create a File::Stat object for the given file name (raising an exception if the file doesn’t exist).



4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
 
# File 'file.c', line 4666

static VALUE
rb_stat_init(VALUE obj, VALUE fname)
{
    struct stat st, *nst;

    rb_secure(2);
    FilePathValue(fname);
    fname = rb_str_encode_ospath(fname);
    if (STAT(StringValueCStr(fname), &st) == -1) {
  rb_sys_fail_path(fname);
    }
    if (DATA_PTR(obj)) {
  xfree(DATA_PTR(obj));
  DATA_PTR(obj) = NULL;
    }
    nst = ALLOC(struct stat);
    *nst = st;
    DATA_PTR(obj) = nst;

    return Qnil;
}

Instance Method Details

#<=>(other_stat) ⇒ -1, ...

Compares File::Stat objects by comparing their respective modification times.

nil is returned if the two values are incomparable.

f1 = File.new("f1", "w")
sleep 1
f2 = File.new("f2", "w")
f1.stat <=> f2.stat   #=> -1

Returns:

  • (-1, 0, 1, nil) 


412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
 
# File 'file.c', line 412

static VALUE
rb_stat_cmp(VALUE self, VALUE other)
{
    if (rb_obj_is_kind_of(other, rb_obj_class(self))) {
        struct timespec ts1 = stat_mtimespec(get_stat(self));
        struct timespec ts2 = stat_mtimespec(get_stat(other));
        if (ts1.tv_sec == ts2.tv_sec) {
            if (ts1.tv_nsec == ts2.tv_nsec) return INT2FIX(0);
            if (ts1.tv_nsec < ts2.tv_nsec) return INT2FIX(-1);
            return INT2FIX(1);
        }
        if (ts1.tv_sec < ts2.tv_sec) return INT2FIX(-1);
        return INT2FIX(1);
    }
    return Qnil;
}

#atime ⇒ Time

Returns the last access time for this file as an object of class Time.

File.stat("testfile").atime   #=> Wed Dec 31 18:00:00 CST 1969

Returns:



796
797
798
799
800
 
# File 'file.c', line 796

static VALUE
rb_stat_atime(VALUE self)
{
    return stat_atime(get_stat(self));
}

#blksize ⇒ Integer?

Returns the native file system’s block size. Will return nil on platforms that don’t support this information.

File.stat("testfile").blksize   #=> 4096

Returns:



678
679
680
681
682
683
684
685
686
 
# File 'file.c', line 678

static VALUE
rb_stat_blksize(VALUE self)
{
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
    return ULONG2NUM(get_stat(self)->st_blksize);
#else
    return Qnil;
#endif
}

#blockdev? ⇒ Boolean

Returns true if the file is a block device, false if it isn’t or if the operating system doesn’t support this feature.

File.stat("testfile").blockdev?    #=> false
File.stat("/dev/hda1").blockdev?   #=> true

Returns:

  • (Boolean) 


4825
4826
4827
4828
4829
4830
4831
4832
4833
 
# File 'file.c', line 4825

static VALUE
rb_stat_b(VALUE obj)
{
#ifdef S_ISBLK
    if (S_ISBLK(get_stat(obj)->st_mode)) return Qtrue;

#endif
    return Qfalse;
}

#blocks ⇒ Integer?

Returns the number of native file system blocks allocated for this file, or nil if the operating system doesn’t support this feature.

File.stat("testfile").blocks   #=> 2

Returns:



699
700
701
702
703
704
705
706
707
708
709
710
711
 
# File 'file.c', line 699

static VALUE
rb_stat_blocks(VALUE self)
{
#ifdef HAVE_STRUCT_STAT_ST_BLOCKS
# if SIZEOF_STRUCT_STAT_ST_BLOCKS > SIZEOF_LONG
    return ULL2NUM(get_stat(self)->st_blocks);
# else
    return ULONG2NUM(get_stat(self)->st_blocks);
# endif
#else
    return Qnil;
#endif
}

#chardev? ⇒ Boolean

Returns true if the file is a character device, false if it isn’t or if the operating system doesn’t support this feature.

File.stat("/dev/tty").chardev?   #=> true

Returns:

  • (Boolean) 


4847
4848
4849
4850
4851
4852
4853
 
# File 'file.c', line 4847

static VALUE
rb_stat_c(VALUE obj)
{
    if (S_ISCHR(get_stat(obj)->st_mode)) return Qtrue;

    return Qfalse;
}

#ctime ⇒ aTime

Returns the change time for stat (that is, the time directory information about the file was changed, not the file itself).

Note that on Windows (NTFS), returns creation time (birth time).

File.stat("testfile").ctime   #=> Wed Apr 09 08:53:14 CDT 2003

Returns:

  • (aTime) 


832
833
834
835
836
 
# File 'file.c', line 832

static VALUE
rb_stat_ctime(VALUE self)
{
    return stat_ctime(get_stat(self));
}

#dev ⇒ Fixnum

Returns an integer representing the device on which stat resides.

File.stat("testfile").dev   #=> 774

Returns:



451
452
453
454
455
 
# File 'file.c', line 451

static VALUE
rb_stat_dev(VALUE self)
{
    return DEVT2NUM(get_stat(self)->st_dev);
}

#dev_major ⇒ Fixnum

Returns the major part of File_Stat#dev or nil.

File.stat("/dev/fd1").dev_major   #=> 2
File.stat("/dev/tty").dev_major   #=> 5

Returns:



468
469
470
471
472
473
474
475
476
 
# File 'file.c', line 468

static VALUE
rb_stat_dev_major(VALUE self)
{
#if defined(major)
    return INT2NUM(major(get_stat(self)->st_dev));
#else
    return Qnil;
#endif
}

#dev_minor ⇒ Fixnum

Returns the minor part of File_Stat#dev or nil.

File.stat("/dev/fd1").dev_minor   #=> 1
File.stat("/dev/tty").dev_minor   #=> 0

Returns:



489
490
491
492
493
494
495
496
497
 
# File 'file.c', line 489

static VALUE
rb_stat_dev_minor(VALUE self)
{
#if defined(minor)
    return INT2NUM(minor(get_stat(self)->st_dev));
#else
    return Qnil;
#endif
}

#directory? ⇒ Boolean

Returns true if stat is a directory, false otherwise.

File.stat("testfile").directory?   #=> false
File.stat(".").directory?          #=> true

Returns:

  • (Boolean) 


4739
4740
4741
4742
4743
4744
 
# File 'file.c', line 4739

static VALUE
rb_stat_d(VALUE obj)
{
    if (S_ISDIR(get_stat(obj)->st_mode)) return Qtrue;
    return Qfalse;
}

#executable? ⇒ Boolean

Returns true if stat is executable or if the operating system doesn’t distinguish executable files from nonexecutable files. The tests are made using the effective owner of the process.

File.stat("testfile").executable?   #=> false

Returns:

  • (Boolean) 


5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
 
# File 'file.c', line 5099

static VALUE
rb_stat_x(VALUE obj)
{
    struct stat *st = get_stat(obj);

#ifdef USE_GETEUID
    if (geteuid() == 0) {
  return st->st_mode & S_IXUGO ? Qtrue : Qfalse;
    }
#endif
#ifdef S_IXUSR
    if (rb_stat_owned(obj))
  return st->st_mode & S_IXUSR ? Qtrue : Qfalse;
#endif
#ifdef S_IXGRP
    if (rb_stat_grpowned(obj))
  return st->st_mode & S_IXGRP ? Qtrue : Qfalse;
#endif
#ifdef S_IXOTH
    if (!(st->st_mode & S_IXOTH)) return Qfalse;
#endif
    return Qtrue;
}

#executable_real? ⇒ Boolean

Same as executable?, but tests using the real owner of the process.

Returns:

  • (Boolean) 


5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
 
# File 'file.c', line 5131

static VALUE
rb_stat_X(VALUE obj)
{
    struct stat *st = get_stat(obj);

#ifdef USE_GETEUID
    if (getuid() == 0) {
  return st->st_mode & S_IXUGO ? Qtrue : Qfalse;
    }
#endif
#ifdef S_IXUSR
    if (rb_stat_rowned(obj))
  return st->st_mode & S_IXUSR ? Qtrue : Qfalse;
#endif
#ifdef S_IXGRP
    if (rb_group_member(get_stat(obj)->st_gid))
  return st->st_mode & S_IXGRP ? Qtrue : Qfalse;
#endif
#ifdef S_IXOTH
    if (!(st->st_mode & S_IXOTH)) return Qfalse;
#endif
    return Qtrue;
}

#file? ⇒ Boolean

Returns true if stat is a regular file (not a device file, pipe, socket, etc.).

File.stat("testfile").file?   #=> true

Returns:

  • (Boolean) 


5166
5167
5168
5169
5170
5171
 
# File 'file.c', line 5166

static VALUE
rb_stat_f(VALUE obj)
{
    if (S_ISREG(get_stat(obj)->st_mode)) return Qtrue;
    return Qfalse;
}

#ftype ⇒ String

Identifies the type of stat. The return string is one of: “file”, “directory”, “characterSpecial”, “blockSpecial”, “fifo”, “link”, “socket”, or “unknown”.

File.stat("/dev/tty").ftype   #=> "characterSpecial"

Returns:



4722
4723
4724
4725
4726
 
# File 'file.c', line 4722

static VALUE
rb_stat_ftype(VALUE obj)
{
    return rb_file_ftype(get_stat(obj));
}

#gid ⇒ Fixnum

Returns the numeric group id of the owner of stat.

File.stat("testfile").gid   #=> 500

Returns:



582
583
584
585
586
 
# File 'file.c', line 582

static VALUE
rb_stat_gid(VALUE self)
{
    return GIDT2NUM(get_stat(self)->st_gid);
}

#grpowned? ⇒ Boolean

Returns true if the effective group id of the process is the same as the group id of stat. On Windows NT, returns false.

File.stat("testfile").grpowned?      #=> true
File.stat("/etc/passwd").grpowned?   #=> false

Returns:

  • (Boolean) 


4893
4894
4895
4896
4897
4898
4899
4900
 
# File 'file.c', line 4893

static VALUE
rb_stat_grpowned(VALUE obj)
{
#ifndef _WIN32
    if (rb_group_member(get_stat(obj)->st_gid)) return Qtrue;
#endif
    return Qfalse;
}

#initialize_copy(orig) ⇒ Object

:nodoc:



4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
 
# File 'file.c', line 4689

static VALUE
rb_stat_init_copy(VALUE copy, VALUE orig)
{
    struct stat *nst;

    if (!OBJ_INIT_COPY(copy, orig)) return copy;
    if (DATA_PTR(copy)) {
  xfree(DATA_PTR(copy));
  DATA_PTR(copy) = 0;
    }
    if (DATA_PTR(orig)) {
  nst = ALLOC(struct stat);
  *nst = *(struct stat*)DATA_PTR(orig);
  DATA_PTR(copy) = nst;
    }

    return copy;
}

#ino ⇒ Fixnum

Returns the inode number for stat.

File.stat("testfile").ino   #=> 1083669

Returns:



509
510
511
512
513
514
515
516
517
 
# File 'file.c', line 509

static VALUE
rb_stat_ino(VALUE self)
{
#if SIZEOF_STRUCT_STAT_ST_INO > SIZEOF_LONG
    return ULL2NUM(get_stat(self)->st_ino);
#else
    return ULONG2NUM(get_stat(self)->st_ino);
#endif
}

#inspect ⇒ String

Produce a nicely formatted description of stat.

File.stat("/etc/passwd").inspect
   #=> "#<File::Stat dev=0xe000005, ino=1078078, mode=0100644,
   #    nlink=1, uid=0, gid=0, rdev=0x0, size=1374, blksize=4096,
   #    blocks=8, atime=Wed Dec 10 10:16:12 CST 2003,
   #    mtime=Fri Sep 12 15:41:41 CDT 2003,
   #    ctime=Mon Oct 27 11:20:27 CST 2003>"

Returns:



852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
 
# File 'file.c', line 852

static VALUE
rb_stat_inspect(VALUE self)
{
    VALUE str;
    size_t i;
    static const struct {
  const char *name;
  VALUE (*func)(VALUE);
    } member[] = {
  {"dev",      rb_stat_dev},
  {"ino",      rb_stat_ino},
  {"mode",    rb_stat_mode},
  {"nlink",   rb_stat_nlink},
  {"uid",      rb_stat_uid},
  {"gid",      rb_stat_gid},
  {"rdev",    rb_stat_rdev},
  {"size",    rb_stat_size},
  {"blksize", rb_stat_blksize},
  {"blocks",  rb_stat_blocks},
  {"atime",   rb_stat_atime},
  {"mtime",   rb_stat_mtime},
  {"ctime",   rb_stat_ctime},
    };

    struct stat* st;
    TypedData_Get_Struct(self, struct stat, &stat_data_type, st);
    if (!st) {
        return rb_sprintf("#<%s: uninitialized>", rb_obj_classname(self));
    }

    str = rb_str_buf_new2("#<");
    rb_str_buf_cat2(str, rb_obj_classname(self));
    rb_str_buf_cat2(str, " ");

    for (i = 0; i < sizeof(member)/sizeof(member[0]); i++) {
  VALUE v;

  if (i > 0) {
      rb_str_buf_cat2(str, ", ");
  }
  rb_str_buf_cat2(str, member[i].name);
  rb_str_buf_cat2(str, "=");
  v = (*member[i].func)(self);
  if (i == 2) {    /* mode */
      rb_str_catf(str, "0%lo", (unsigned long)NUM2ULONG(v));
  }
  else if (i == 0 || i == 6) { /* dev/rdev */
      rb_str_catf(str, "0x%"PRI_DEVT_PREFIX"x", NUM2DEVT(v));
  }
  else {
      rb_str_append(str, rb_inspect(v));
  }
    }
    rb_str_buf_cat2(str, ">");
    OBJ_INFECT(str, self);

    return str;
}

#mode ⇒ Fixnum

Returns an integer representing the permission bits of stat. The meaning of the bits is platform dependent; on Unix systems, see stat(2).

File.chmod(0644, "testfile")   #=> 1
s = File.stat("testfile")
sprintf("%o", s.mode)          #=> "100644"

Returns:



532
533
534
535
536
 
# File 'file.c', line 532

static VALUE
rb_stat_mode(VALUE self)
{
    return UINT2NUM(ST2UINT(get_stat(self)->st_mode));
}

#mtime ⇒ aTime

Returns the modification time of stat.

File.stat("testfile").mtime   #=> Wed Apr 09 08:53:14 CDT 2003

Returns:

  • (aTime) 


812
813
814
815
816
 
# File 'file.c', line 812

static VALUE
rb_stat_mtime(VALUE self)
{
    return stat_mtime(get_stat(self));
}

#nlink ⇒ Fixnum

Returns the number of hard links to stat.

File.stat("testfile").nlink             #=> 1
File.link("testfile", "testfile.bak")   #=> 0
File.stat("testfile").nlink             #=> 2

Returns:



550
551
552
553
554
 
# File 'file.c', line 550

static VALUE
rb_stat_nlink(VALUE self)
{
    return UINT2NUM(get_stat(self)->st_nlink);
}

#owned? ⇒ Boolean

Returns true if the effective user id of the process is the same as the owner of stat.

File.stat("testfile").owned?      #=> true
File.stat("/etc/passwd").owned?   #=> false

Returns:

  • (Boolean) 


4867
4868
4869
4870
4871
4872
 
# File 'file.c', line 4867

static VALUE
rb_stat_owned(VALUE obj)
{
    if (get_stat(obj)->st_uid == geteuid()) return Qtrue;
    return Qfalse;
}

#pipe? ⇒ Boolean

Returns true if the operating system supports pipes and stat is a pipe; false otherwise.

Returns:

  • (Boolean) 


4754
4755
4756
4757
4758
4759
4760
4761
4762
 
# File 'file.c', line 4754

static VALUE
rb_stat_p(VALUE obj)
{
#ifdef S_IFIFO
    if (S_ISFIFO(get_stat(obj)->st_mode)) return Qtrue;

#endif
    return Qfalse;
}

#rdev ⇒ Fixnum?

Returns an integer representing the device type on which stat resides. Returns nil if the operating system doesn’t support this feature.

File.stat("/dev/fd1").rdev   #=> 513
File.stat("/dev/tty").rdev   #=> 1280

Returns:



600
601
602
603
604
605
606
607
608
 
# File 'file.c', line 600

static VALUE
rb_stat_rdev(VALUE self)
{
#ifdef HAVE_STRUCT_STAT_ST_RDEV
    return DEVT2NUM(get_stat(self)->st_rdev);
#else
    return Qnil;
#endif
}

#rdev_major ⇒ Fixnum

Returns the major part of File_Stat#rdev or nil.

File.stat("/dev/fd1").rdev_major   #=> 2
File.stat("/dev/tty").rdev_major   #=> 5

Returns:



621
622
623
624
625
626
627
628
629
 
# File 'file.c', line 621

static VALUE
rb_stat_rdev_major(VALUE self)
{
#if defined(HAVE_STRUCT_STAT_ST_RDEV) && defined(major)
    return DEVT2NUM(major(get_stat(self)->st_rdev));
#else
    return Qnil;
#endif
}

#rdev_minor ⇒ Fixnum

Returns the minor part of File_Stat#rdev or nil.

File.stat("/dev/fd1").rdev_minor   #=> 1
File.stat("/dev/tty").rdev_minor   #=> 0

Returns:



642
643
644
645
646
647
648
649
650
 
# File 'file.c', line 642

static VALUE
rb_stat_rdev_minor(VALUE self)
{
#if defined(HAVE_STRUCT_STAT_ST_RDEV) && defined(minor)
    return DEVT2NUM(minor(get_stat(self)->st_rdev));
#else
    return Qnil;
#endif
}

#readable? ⇒ Boolean

Returns true if stat is readable by the effective user id of this process.

File.stat("testfile").readable?   #=> true

Returns:

  • (Boolean) 


4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
 
# File 'file.c', line 4913

static VALUE
rb_stat_r(VALUE obj)
{
    struct stat *st = get_stat(obj);

#ifdef USE_GETEUID
    if (geteuid() == 0) return Qtrue;
#endif
#ifdef S_IRUSR
    if (rb_stat_owned(obj))
  return st->st_mode & S_IRUSR ? Qtrue : Qfalse;
#endif
#ifdef S_IRGRP
    if (rb_stat_grpowned(obj))
  return st->st_mode & S_IRGRP ? Qtrue : Qfalse;
#endif
#ifdef S_IROTH
    if (!(st->st_mode & S_IROTH)) return Qfalse;
#endif
    return Qtrue;
}

#readable_real? ⇒ Boolean

Returns true if stat is readable by the real user id of this process.

File.stat("testfile").readable_real?   #=> true

Returns:

  • (Boolean) 


4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
 
# File 'file.c', line 4946

static VALUE
rb_stat_R(VALUE obj)
{
    struct stat *st = get_stat(obj);

#ifdef USE_GETEUID
    if (getuid() == 0) return Qtrue;
#endif
#ifdef S_IRUSR
    if (rb_stat_rowned(obj))
  return st->st_mode & S_IRUSR ? Qtrue : Qfalse;
#endif
#ifdef S_IRGRP
    if (rb_group_member(get_stat(obj)->st_gid))
  return st->st_mode & S_IRGRP ? Qtrue : Qfalse;
#endif
#ifdef S_IROTH
    if (!(st->st_mode & S_IROTH)) return Qfalse;
#endif
    return Qtrue;
}

#setgid? ⇒ Boolean

Returns true if stat has the set-group-id permission bit set, false if it doesn’t or if the operating system doesn’t support this feature.

File.stat("/usr/sbin/lpc").setgid?   #=> true

Returns:

  • (Boolean) 


5242
5243
5244
5245
5246
5247
5248
5249
 
# File 'file.c', line 5242

static VALUE
rb_stat_sgid(VALUE obj)
{
#ifdef S_ISGID
    if (get_stat(obj)->st_mode & S_ISGID) return Qtrue;
#endif
    return Qfalse;
}

#setuid? ⇒ Boolean

Returns true if stat has the set-user-id permission bit set, false if it doesn’t or if the operating system doesn’t support this feature.

File.stat("/bin/su").setuid?   #=> true

Returns:

  • (Boolean) 


5221
5222
5223
5224
5225
5226
5227
5228
 
# File 'file.c', line 5221

static VALUE
rb_stat_suid(VALUE obj)
{
#ifdef S_ISUID
    if (get_stat(obj)->st_mode & S_ISUID) return Qtrue;
#endif
    return Qfalse;
}

#size ⇒ Fixnum

Returns the size of stat in bytes.

File.stat("testfile").size   #=> 66

Returns:



661
662
663
664
665
 
# File 'file.c', line 661

static VALUE
rb_stat_size(VALUE self)
{
    return OFFT2NUM(get_stat(self)->st_size);
}

#size ⇒ Integer

Returns the size of stat in bytes.

File.stat("testfile").size   #=> 66

Returns:



5201
5202
5203
5204
5205
5206
5207
5208
 
# File 'file.c', line 5201

static VALUE
rb_stat_s(VALUE obj)
{
    off_t size = get_stat(obj)->st_size;

    if (size == 0) return Qnil;
    return OFFT2NUM(size);
}

#socket? ⇒ Boolean

Returns true if stat is a socket, false if it isn’t or if the operating system doesn’t support this feature.

File.stat("testfile").socket?   #=> false

Returns:

  • (Boolean) 


4802
4803
4804
4805
4806
4807
4808
4809
4810
 
# File 'file.c', line 4802

static VALUE
rb_stat_S(VALUE obj)
{
#ifdef S_ISSOCK
    if (S_ISSOCK(get_stat(obj)->st_mode)) return Qtrue;

#endif
    return Qfalse;
}

#sticky? ⇒ Boolean

Returns true if stat has its sticky bit set, false if it doesn’t or if the operating system doesn’t support this feature.

File.stat("testfile").sticky?   #=> false

Returns:

  • (Boolean) 


5263
5264
5265
5266
5267
5268
5269
5270
 
# File 'file.c', line 5263

static VALUE
rb_stat_sticky(VALUE obj)
{
#ifdef S_ISVTX
    if (get_stat(obj)->st_mode & S_ISVTX) return Qtrue;
#endif
    return Qfalse;
}

#symlink? ⇒ Boolean

Returns true if stat is a symbolic link, false if it isn’t or if the operating system doesn’t support this feature. As File::stat automatically follows symbolic links, symlink? will always be false for an object returned by File::stat.

File.symlink("testfile", "alink")   #=> 0
File.stat("alink").symlink?         #=> false
File.lstat("alink").symlink?        #=> true

Returns:

  • (Boolean) 


4781
4782
4783
4784
4785
4786
4787
4788
 
# File 'file.c', line 4781

static VALUE
rb_stat_l(VALUE obj)
{
#ifdef S_ISLNK
    if (S_ISLNK(get_stat(obj)->st_mode)) return Qtrue;
#endif
    return Qfalse;
}

#uid ⇒ Fixnum

Returns the numeric user id of the owner of stat.

File.stat("testfile").uid   #=> 501

Returns:



566
567
568
569
570
 
# File 'file.c', line 566

static VALUE
rb_stat_uid(VALUE self)
{
    return UIDT2NUM(get_stat(self)->st_uid);
}

#world_readable? ⇒ Fixnum?

If stat is readable by others, returns an integer representing the file permission bits of stat. Returns nil otherwise. The meaning of the bits is platform dependent; on Unix systems, see stat(2).

m = File.stat("/etc/passwd").world_readable?  #=> 420
sprintf("%o", m)            #=> "644"

Returns:



4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
 
# File 'file.c', line 4981

static VALUE
rb_stat_wr(VALUE obj)
{
#ifdef S_IROTH
    if ((get_stat(obj)->st_mode & (S_IROTH)) == S_IROTH) {
  return UINT2NUM(get_stat(obj)->st_mode & (S_IRUGO|S_IWUGO|S_IXUGO));
    }
    else {
  return Qnil;
    }
#endif
}

#world_writable? ⇒ Fixnum?

If stat is writable by others, returns an integer representing the file permission bits of stat. Returns nil otherwise. The meaning of the bits is platform dependent; on Unix systems, see stat(2).

m = File.stat("/tmp").world_writable?     #=> 511
sprintf("%o", m)            #=> "777"

Returns:



5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
 
# File 'file.c', line 5073

static VALUE
rb_stat_ww(VALUE obj)
{
#ifdef S_IROTH
    if ((get_stat(obj)->st_mode & (S_IWOTH)) == S_IWOTH) {
  return UINT2NUM(get_stat(obj)->st_mode & (S_IRUGO|S_IWUGO|S_IXUGO));
    }
    else {
  return Qnil;
    }
#endif
}

#writable? ⇒ Boolean

Returns true if stat is writable by the effective user id of this process.

File.stat("testfile").writable?   #=> true

Returns:

  • (Boolean) 


5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
 
# File 'file.c', line 5005

static VALUE
rb_stat_w(VALUE obj)
{
    struct stat *st = get_stat(obj);

#ifdef USE_GETEUID
    if (geteuid() == 0) return Qtrue;
#endif
#ifdef S_IWUSR
    if (rb_stat_owned(obj))
  return st->st_mode & S_IWUSR ? Qtrue : Qfalse;
#endif
#ifdef S_IWGRP
    if (rb_stat_grpowned(obj))
  return st->st_mode & S_IWGRP ? Qtrue : Qfalse;
#endif
#ifdef S_IWOTH
    if (!(st->st_mode & S_IWOTH)) return Qfalse;
#endif
    return Qtrue;
}

#writable_real? ⇒ Boolean

Returns true if stat is writable by the real user id of this process.

File.stat("testfile").writable_real?   #=> true

Returns:

  • (Boolean) 


5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
 
# File 'file.c', line 5038

static VALUE
rb_stat_W(VALUE obj)
{
    struct stat *st = get_stat(obj);

#ifdef USE_GETEUID
    if (getuid() == 0) return Qtrue;
#endif
#ifdef S_IWUSR
    if (rb_stat_rowned(obj))
  return st->st_mode & S_IWUSR ? Qtrue : Qfalse;
#endif
#ifdef S_IWGRP
    if (rb_group_member(get_stat(obj)->st_gid))
  return st->st_mode & S_IWGRP ? Qtrue : Qfalse;
#endif
#ifdef S_IWOTH
    if (!(st->st_mode & S_IWOTH)) return Qfalse;
#endif
    return Qtrue;
}

#zero? ⇒ Boolean

Returns true if stat is a zero-length file; false otherwise.

File.stat("testfile").zero?   #=> false

Returns:

  • (Boolean) 


5184
5185
5186
5187
5188
5189
 
# File 'file.c', line 5184

static VALUE
rb_stat_z(VALUE obj)
{
    if (get_stat(obj)->st_size == 0) return Qtrue;
    return Qfalse;
}