vlib: add inode/mode information functionality (#4242)

* vlib: add inode/mode information functionality

* vlib: add docs to inode
pull/4243/head
Daniel Däschle 2020-04-04 23:37:13 +02:00 committed by GitHub
parent ef59bac511
commit e077cce103
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2 changed files with 135 additions and 0 deletions

92
vlib/os/inode.v 100644
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// Copyright (c) 2019-2020 Alexander Medvednikov. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module os
enum FileType {
regular
directory
character_device
block_device
fifo
symbolic_link
socket
}
struct FilePermission {
read bool
write bool
execute bool
}
struct FileMode {
typ FileType
owner FilePermission
group FilePermission
others FilePermission
}
// inode returns the mode of the file/inode containing inode type and permission information
// it supports windows for regular files but it doesn't matter if you use owner, group or others when checking permissions on windows
pub fn inode(path string) FileMode {
mut attr := C.stat{}
C.stat(path.str, &attr)
mut typ := FileType.regular
if attr.st_mode & C.S_IFMT == C.S_IFDIR {
typ = .directory
}
$if !windows {
if attr.st_mode & C.S_IFMT == C.S_IFCHR {
typ = .character_device
} else if attr.st_mode & C.S_IFMT == C.S_IFBLK {
typ = .block_device
} else if attr.st_mode & C.S_IFMT == C.S_IFIFO {
typ = .fifo
} else if attr.st_mode & C.S_IFMT == C.S_IFLNK {
typ = .symbolic_link
} else if attr.st_mode & C.S_IFMT == C.S_IFSOCK {
typ = .socket
}
}
$if windows {
return FileMode{
typ: typ
owner: FilePermission{
read: bool(attr.st_mode & C.S_IREAD)
write: bool(attr.st_mode & C.S_IWRITE)
execute: bool(attr.st_mode & C.S_IEXEC)
}
group: FilePermission{
read: bool(attr.st_mode & C.S_IREAD)
write: bool(attr.st_mode & C.S_IWRITE)
execute: bool(attr.st_mode & C.S_IEXEC)
}
others: FilePermission{
read: bool(attr.st_mode & C.S_IREAD)
write: bool(attr.st_mode & C.S_IWRITE)
execute: bool(attr.st_mode & C.S_IEXEC)
}
}
} $else {
return FileMode{
typ: typ
owner: FilePermission{
read: bool(attr.st_mode & C.S_IRUSR)
write: bool(attr.st_mode & C.S_IWUSR)
execute: bool(attr.st_mode & C.S_IXUSR)
}
group: FilePermission{
read: bool(attr.st_mode & C.S_IRGRP)
write: bool(attr.st_mode & C.S_IWGRP)
execute: bool(attr.st_mode & C.S_IXGRP)
}
others: FilePermission{
read: bool(attr.st_mode & C.S_IROTH)
write: bool(attr.st_mode & C.S_IWOTH)
execute: bool(attr.st_mode & C.S_IXOTH)
}
}
}
}

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import os
const (
// tfolder will contain all the temporary files/subfolders made by
// the different tests. It would be removed in testsuite_end(), so
// individual os tests do not need to clean up after themselves.
tfolder = os.join_path(os.temp_dir(), 'v', 'tests', 'inode_test')
)
fn testsuite_begin() {
eprintln('testsuite_begin, tfolder = $tfolder')
os.rmdir_all(tfolder)
assert !os.is_dir(tfolder)
os.mkdir_all(tfolder)
os.chdir(tfolder)
assert os.is_dir(tfolder)
}
fn testsuite_end() {
os.chdir(os.wd_at_startup)
os.rmdir_all(tfolder)
assert !os.is_dir(tfolder)
}
fn test_inode_file_type() {
filename := './test1.txt'
mut file := os.open_file(filename, 'w', 0o600)
file.close()
mode := os.inode(filename)
os.rm(filename)
assert mode.typ == .regular
}
fn test_inode_file_owner_permission() {
filename := './test2.txt'
mut file := os.open_file(filename, 'w', 0o600)
file.close()
mode := os.inode(filename)
os.rm(filename)
assert mode.owner.read
assert mode.owner.write
assert !mode.owner.execute
}