PeterHarding at 06:06, 19 July 2009

2009-07-19T06:06:55Z

← Older revision		Revision as of 16:06, 19 July 2009
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	[[Category:Python]]		[[Category:Python]]
			[[Category:Examples]]

PeterHarding: New page: =Script=

 #!/usr/bin/env python # #  A bunch of convenience functions for testing file attributes. # #  Written by Sean Reifschneider  #  Please direct...

2008-07-11T07:47:29Z

New page: =Script= <pre> #!/usr/bin/env python # # A bunch of convenience functions for testing file attributes. # # Written by Sean Reifschneider <jafo-python-fileinfo@tummy.com> # Please direct...

New page

=Script=
<pre>
#!/usr/bin/env python
#
# A bunch of convenience functions for testing file attributes.
#
# Written by Sean Reifschneider <jafo-python-fileinfo@tummy.com>
# Please direct all comments to him at the above address.
#
# VERSION: 1.0 1999-01-04

#TODO:
# Does not implement -O and -G tests from "test" (is file effectively
# uid or gid you)?
# Find a common naming scheme (or two -- posix-like and "other"?) for methods
# f_ok() => exists()
# r_ok() => readable()
# x_ok() => executeable()
# ifreg() => is_reg()?
# ifdir() => is_dir()?
# is_woth() => s_iwoth() or write_other()?
# is_rgrp() => s_irgrp() or read_group()?
# is_suid() => s_isuid() or setuid()?

import os
import stat
import types

def _ok(name, mode):
try: os.access(name, mode)
except: return(0)
return 1

def f_ok(name): return(_ok(name, os.F_OK))
def r_ok(name): return(_ok(name, os.R_OK))
def w_ok(name): return(_ok(name, os.W_OK))
def x_ok(name): return(_ok(name, os.X_OK))

# stat routine that automaticly selects stat/fstat/lstat (if followsymlink)

def mstat(name, followsymlink = 1):
if type(name) == types.StringType:
info = os.stat(name)
if followsymlink and stat.S_ISLNK(info[stat.ST_MODE]):
return(os.lstat(name))
return(info)
return(os.fstat(name))

def _mode(name): return(mstat(name)[stat.ST_MODE])

def mode(name): return(stat.S_IMODE(_mode(name)))
def ifreg(name): return(stat.S_ISREG(_mode(name)))
def ifdir(name): return(stat.S_ISDIR(_mode(name)))
def ifchr(name): return(stat.S_ISCHR(_mode(name)))
def ifblk(name): return(stat.S_ISBLK(_mode(name)))
def iffifo(name): return(stat.S_ISFIFO(_mode(name)))
def iflnk(name): return(stat.S_ISLNK(_mode(name)))
def ifsock(name): return(stat.S_ISSOCK(_mode(name)))

def is_suid(name): return(_mode(name) & stat.S_ISUID == stat.S_ISUID)
def is_sgid(name): return(_mode(name) & stat.S_ISGID == stat.S_ISGID)
def is_svtx(name): return(_mode(name) & stat.S_ISVTX == stat.S_ISVTX)
def is_read(name): return(_mode(name) & stat.S_IREAD == stat.S_IREAD)
def is_write(name): return(_mode(name) & stat.S_IWRITE == stat.S_IWRITE)
def is_exec(name): return(_mode(name) & stat.S_IEXEC == stat.S_IEXEC)
def is_rwxu(name): return(_mode(name) & stat.S_IRWXU == stat.S_IRWXU)
def is_rusr(name): return(_mode(name) & stat.S_IRUSR == stat.S_IRUSR)
def is_wusr(name): return(_mode(name) & stat.S_IWUSR == stat.S_IWUSR)
def is_xusr(name): return(_mode(name) & stat.S_IXUSR == stat.S_IXUSR)
def is_rwxg(name): return(_mode(name) & stat.S_IRWXG == stat.S_IRWXG)
def is_rgrp(name): return(_mode(name) & stat.S_IRGRP == stat.S_IRGRP)
def is_wgrp(name): return(_mode(name) & stat.S_IWGRP == stat.S_IWGRP)
def is_xgrp(name): return(_mode(name) & stat.S_IXGRP == stat.S_IXGRP)
def is_rwxo(name): return(_mode(name) & stat.S_IRWXO == stat.S_IRWXO)
def is_roth(name): return(_mode(name) & stat.S_IROTH == stat.S_IROTH)
def is_woth(name): return(_mode(name) & stat.S_IWOTH == stat.S_IWOTH)
def is_xoth(name): return(_mode(name) & stat.S_IXOTH == stat.S_IXOTH)

def is_empty(name): return(mstat(name)[stat.ST_SIZE] == 0)
def size(name): return(mstat(name)[stat.ST_SIZE])
def isatty(file):
try:
os.ttyname(file)
return(1)
except OSError, e:
if e == '[Errno 2] No such file or directory':
return(0)
raise

# returns age difference between lhs and rhs files (in seconds):
# <0 lhs older than rhs
# >0 lhs newer than rhs
# 0 lhs same age as rhs
def mtime_cmp(lhs, rhs): return(mtime(lhs) - mtime(rhs))
def mtime(file): return(mstat(lhs)[stat.ST_MTIME])
def mtime_newer(lhs, rhs): return(mtime_cmp(lhs, rhs) > 0)
def mtime_older(lhs, rhs): return(mtime_cmp(lhs, rhs) < 0)
def mtime_equal(lhs, rhs): return(mtime_cmp(lhs, rhs) == 0)
</pre>

[[Category:Python]]

FileInfo.py - Revision history

PeterHarding at 06:06, 19 July 2009

PeterHarding: New page: =Script=
#!/usr/bin/env python # # A bunch of convenience functions for testing file attributes. # # Written by Sean Reifschneider # Please direct...